Operation and Maintenance Manual
InRow® Chilled Water Cooling Units
InRow® RC
ACRC500, ACRC501, ACRC502
990-3237B-001
Publication Date: November 2014
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Table of Contents
InRow RC Operation and Maintenance Manual
i
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Display Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Event Log. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Quick Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
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General Information
Important Safety Information
Read the instructions carefully to become familiar with the equipment before trying to install, operate, service,
or maintain it. The following special messages may appear throughout this manual or on the equipment to warn
of potential hazards or to call attention to information that clarifies or simplifies a procedure.
The addition of this symbol to a Danger or Warning safety label indicates that an electrical hazard
exists which will result in personal injury if the instructions are not followed.
This is the safety alert symbol. It is used to alert you to potential personal injury hazards. Obey all
safety messages that follow this symbol to avoid possible injury or death.
DANGER
DANGER indicates an imminently hazardous situation which, if not avoided, will result in death
or serious injury.
WARNING
WARNING indicates a potentially hazardous situation which, if not avoided, can result in death
or serious injury.
CAUTION
CAUTION indicates a potentially hazardous situation which, if not avoided, can result in minor
or moderate injury.
NOTICE
NOTICE addresses practices not related to physical injury including certain environmental
hazards, potential damage or loss of data.
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Safety Notices During Operation
Read and adhere to the following important safety considerations when working with this equipment. Follow all
local and national regulations when handling refrigerants. Service to the components in the refrigeration loop
should be performed only by a certified HVAC technician.
DANGER
HAZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH
• Apply appropriate personal protective equipment (PPE) and follow safe electrical work
practices. See NFPA 70E or CSA Z462.
• This equipment must be installed and serviced by qualified personnel only.
• Turn off all power supplying this equipment before working on or inside the equipment.
• Always use a properly rated voltage sensing device to confirm power is off.
• Replace all devices, doors, and covers before turning on power to this equipment.
Failure to follow these instructions will result in death or serious injury.
WARNING
HAZARD FROM MOVING PARTS
Keep hands, clothing, and jewelry away from moving parts. Check the equipment for
foreign objects before closing the doors and starting the equipment.
Failure to follow these instructions can result in death, serious injury, or
equipment damage.
WARNING
HAZARD TO EQUIPMENT OR PERSONNEL
All work must be performed by Schneider Electric qualified personnel.
Failure to follow these instructions can result in death, serious injury, or
equipment damage.
CAUTION
HAZARD TO EQUIPMENT OR PERSONNEL
Ensure that all spare parts and tools are removed from the equipment before operating it
Failure to follow these instructions can result in injury or equipment damage.
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NOTICE
STATIC ELECTRICITY HAZARD
Circuit boards contained within this unit are sensitive to static electricity. Use one or more
electrostatic-discharge device while handling the boards.
Failure to follow these instructions can result in equipment damage.
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Commissioning
After installation, complete the following checklists to verify that all components are working properly and that
the equipment is ready to begin operation.
Checklists
Initial inspection checklist
The initial inspection ensures that the equipment has been properly installed, the location of the cooling unit has
been properly prepared and the cooling unit is free of damage.
WARNING
DAMAGE TO EQUIPMENT OR PERSONNEL
Do not run service utilities in front of the fan outlet.
Failure to follow these instructions can result in death, serious injury, or
equipment damage.
NOTE: The vapor barrier minimizes moisture infiltration. Without a vapor barrier, it will be difficult to maintain
the humidity in the room. Do not introduce unconditioned outside air into the space.
Ensure that:
The installation procedure is complete according to the requirements of this installation manual.
The walls, floor, and ceiling of the room where the cooling unit is located are sealed with a vapor barrier.
There is no evidence of damage to the cooling unit.
The clearance around the equipment is in accordance with local and national codes and regulations as well
as this installation manual.
The cooling unit is level and joined to the adjacent racks
The cooling unit is not installed at the open end of a row.
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Electrical inspection checklist
The electrical inspection verifies that all electrical connections are secure and correct and that the equipment is
properly grounded.
WARNING
ELECTRICAL HAZARD
• Electrical service must conform to local and national electrical codes and regulations.
• The equipment must be grounded.
Failure to follow these instructions can result in death, serious injury, or
equipment damage.
Ensure that:
Incoming voltages match the phase and voltage listing on the nameplate.
Electrical wiring complies with local and national codes and regulations.
Equipment is properly grounded.
Front door is properly grounded.
Electrical connections are tight, including contactors, terminal blocks, controllers, switches, relays, auxiliary
devices, and field connections.
Circuit breakers are properly connected and securely attached to the DIN rail.
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Mechanical inspection checklist
The mechanical inspection verifies that all mechanical components and connections are secure.
CAUTION
PIPING INSTALLATION
Failure to properly install piping may result in improper cooling unit operation or possible
damage to the cooling unit or surrounding equipment.
Failure to follow these instructions can result in equipment damage.
Ensure that:
Condensate drain line is at least the size of the drain connection.
Mechanical connections are tight.
Fans are turning freely and the blades are not distorted or bent.
Pipe fittings are tight.
Air is bled from the water system. If air remains in the system, bleed it out now.
Supply chilled water temperature is recorded.
Chilled water flow is correct based on the performance requirements of the cooling unit.
Field-installed traps and piping are in accordance with the installation manual. Strainers are in place in the
chilled water supply loop. Proper piping practices have been followed.
Piping is adequately supported and isolated when necessary.
Field-installed service valves are open.
Water outlet temperature sensor is positioned correctly. For top-connected cooling units, the wire with only a
green wire tie is positioned in connector J23. For bottom-connected cooling units, the wire with both green
and white wire ties is positioned in connector J23.
Piping in the building and on the roof is properly insulated.
Covers and guards are in place.
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User interface inspection checklist
The user interface inspection verifies that the sensors and internal communication links are installed properly.
Check that the outdoor heat exchanger is connected to the cooling unit and to the other cooling units in the
room if you are using cooling group controls.
Ensure that:
An A-Link bus is connected to each cooling unit and a terminator is plugged into all unused A-Link
connectors.
The input contacts and output relays are connected correctly.
The building management system is connected correctly and a terminator is wired into the final cooling unit.
The temperature sensors located on the front of the equipment are connected correctly.
The rack temperature sensors are installed correctly.
The network port is connected correctly and an IP address has been assigned to the cooling unit.
The optional rope water detection device is installed properly.
Start-up inspection checklist
The start-up inspection ensures that the equipment is operating properly after the initial start-up. This inspection
verifies that all modes of operation are working correctly and that the cooling unit is ready for normal operation.
While the equipment is operating, ensure that:
The cooling unit is free from malfunctions, including chilled water leaks, unusual vibrations, or other
irregularities, in each mode of operation.
The current draw of fan motors and transformers for the cooling operation is within the ratings of the
respective circuit breakers.
Record the current at the main power connection of the main circuit breaker.
Record all current draws on the load side of any circuit breakers used for each device.
Compare the circuit breaker setting for each device to the actual current measured and the full load amps of
the device to verify that the current draws are acceptable.
Feed B can supply power to all functions in the equipment.
The cool cycle engages.
The correct water outlet temperature sensor is positioned in connector J23.
Air filters are clean and free of debris. Replace air filters as needed.
The clogged filter alarm is operating properly.
Cover 1/3 of the filter area to initiate the alarm.
Final inspection checklist
The final inspection verifies that the system is clean, and the start-up form has been sent to Schneider Electric.
Ensure that:
The system is clean and free from debris.
Packaging materials are disposed of properly.
The start-up form was completed and sent to Schneider Electric.
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Operation
Display Interface
Status
ESC
?
Check
Log
Warning
Critical
Item Description
Function
Critical Alarm LED (red)
When lit, a critical alarm condition exists and requires your
immediate attention.
Warning Alarm LED (yellow)
Check Log LED (yellow)
When lit, a warning alarm condition exists. Failure to correct this
condition could cause a critical alarm.
When lit, at least one new event has been logged since the last time
the log was checked. Only events that pertain to the operation of the
cooling unit will activate the LED.
Status LED (green)
When lit, the cooling unit is receiving electrical power. When flashing
green, the cooling unit is downloading firmware for the controller.
This takes several minutes.
Liquid Crystal Display (LCD)
View alarms, status data, context-sensitive help, and modify
configurable items.
UP and DOWN arrow keys
ESC key
Select menu items and access information.
Return to previous screen or cancel current operation.
ENTER key
Open menu items and input changes to cooling group level and
cooling unit level settings.
HELP key
Display context-sensitive help. Press the HELP key for information
about each option on the screen and for instructions on performing
tasks.
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Using the Display
Every time you apply power to the cooling unit, the display interface initializes, causing the LEDs to cycle and
the alarm-tone to activate.
Scrolling status screens
After start-up, the interface displays the firmware revision number of the display interface. The display interface
then scrolls automatically and continuously through screens of status information. Press the up or down arrow
key to interrupt the automatic scrolling and view a specific status screen. To return to the scrolling status
screens, press ESC from one of the main menu screens.
Status Screen Name
Status Information Displayed
InRow RC
• On/Standby
• Unit identifier
• Cooling Unit name
• Cooling Unit location
Group
Unit
• Alarms/No Alarms
• Cool Outpt (Cool Output) kW
• Cool Setpt (Cool Setpoint) °C (or °F)
• Max Rack (Maximum Rack Temperature) °C (or °F)
• Alarms/No Alarms
• Cool Output kW
• Max Rack In (Maximum Rack Inlet Temperature) °C (or °F)
• Air Flow l/s (liters per second) or CFM (cubic feet per minute)
Main menu screens
On any top-level status screen, press the ENTER or ESC key to open the first
main menu screen.
NOTE: Once a period of inactivity (at the keys of the display interface)
exceeds the Password Timeout setting, the display interface returns to
the scrolling status screens.
On/Standby
View Alarms
Clear Alarms
View Event Log
Clear Event Log
Configure Modbus
Set Date & Time
Set Password
For information on setting the time-out duration, see
Set Display Units
Configure Display
Configure Network
All main menu choices are displayed on a series of six main menu screens.
Navigating the main menu
About InRow RC
Set Identification
Service Intervals
Selector arrow: Press the up or down arrow key to move the selector arrow
to a main menu option. Press the ENTER key to view the selected sub-menu
screen. In the example shown below, the selector arrow points to the Set Date
and Time setting. To select that item, press the ENTER key.
View Run Hours
Configure Unit
Configure Group
Set Group PIDs
Time: 13:15:23
Date: 18-Nov-2010
Format: dd/mm/yyyy
View Group Status
View Unit Status
Set Group Setpoints
Set Unit Threshlds
NOTE: If the selector arrow is on the top line of a main menu screen, press the
up arrow key to move the selector arrow to the top line of the previous screen.
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Continue arrows: Continue arrows indicate that additional options or settings are available on a menu or
status screen. Press the up or down arrow key to view the additional items.
Clear Event Log
Configure Modbus
Set Date & Time
Set Password
Navigating sub-menus
Selecting a option displays the sub-menu screen for that option. In this example, the selector arrow is on the
top line of the Set Date and Time sub-menu screen.
Time: 13:15:23
Date: 18-Nov-2010
Format: dd/mm/yyyy
Use the up or down arrow key to move the selector arrow to an option, and press the ENTER key.
• List of choices: If the setting is a list of choices, an input arrow displays next to the setting. Press the
up or down arrow key to select the menu option to change. Then press the ENTER key to exit the input
mode and save the setting. Press the ESC key to exit without saving.
• Numbers or text fields: If the setting is a number or text field, use the arrow keys to select the value of
the first character, and press the ENTER key to move to the next character. Press the ENTER key after
the last character is set to exit the input mode and save the setting. Press the ESC key to exit without
saving. If an invalid value is entered, the display interface beeps and restores the previous valid value to
the field.
Input arrows: Input arrows next to a selected setting indicate that the setting can be modified by pressing
the up or down arrow key. Press the ENTER key to save the change or the ESC key to cancel the change.
Time: 13:15:23
Date: 18-Nov-2010
Format: dd/mm/yyyy
Using the Path statement
Select the main- and sub-menu options specified in the path statement to view or configure a setting. The path
statement lists the main- and sub-menu items you select to navigate to the item to view or modify. The parts of
the path statement are defined below:
Path: Main > Set Password > Change Passwords
Main >: Your starting point is the main menu.
Set Password >: Scroll to and select this option from the main menu.
Change Passwords >: Scroll to and select this option from the sub-menu.
Subsequent options are listed and defined under the path statement.
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Password entry
The cooling unit has two levels of password protection:
• Device password allows Device Users to change basic and environmental settings.
• Admin password allows all privileges granted for Device Users, and also allows the Administrator to
modify settings that control the components in the cooling unit or change advanced options.
When you try to change a setting, the display interface prompts you to enter your Admin password. The default
value for both the Device and Admin password is apc (lowercase). To enter your password, use the up or down
arrow key to scroll through the available character set. Press the ENTER key to select the current character
and move the cursor to the next character position. After selecting the last character of your password, press
the ENTER key once more to submit your password.
Once the password is entered, it remains in effect until the period of inactivity exceeds the Password Timeout
setting.
NOTE: Passwords are case sensitive.
Start the cooling unit
Path: Main > On/Standby
1. To start the cooling unit, press the ENTER key until the cursor is on the Operation > On/Standby menu
item.
2. Press the ENTER key again to show the toggle state arrow to the right of Operation.
3. Use the up and down arrow keys to change from Standby to On.
See “Path: Main > Operation > Limit Access” below if you are prompted to enter a password
before changing the On/Standby setting.
4. Press the ENTER key again to set the On position.
a. The fans will start.
b. The cooling unit will run according to the configured settings.
NOTE: On/Standby only affects the local cooling unit. You must set the On/Standby option for each
cooling unit in the cooling group.
Path: Main > Operation > Limit Access
The default setting for the Limit Access password protection option is No. If the Limit Access option has been
set to Yes, you will be prompted to enter the Device password before a change can be made to the On/
Standby setting.
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Stop the cooling unit
DANGER
HAZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH
• Apply appropriate personal protective equipment (PPE) and follow safe electrical work
practices. See NFPA 70E or CSA Z462.
• This equipment must be installed and serviced by qualified personnel only.
• Turn off all power supplying this equipment before working on or inside the equipment.
• Always use a properly rated voltage sensing device to confirm power is off.
• Replace all devices, doors, and covers before turning on power to this equipment.
Failure to follow these instructions will result in death or serious injury.
CAUTION
STANDBY OPTION
The Standby option does not remove power from the cooling unit. You must disconnect
power at the mains to remove power from the cooling unit.
Failure to follow these instructions can result in equipment damage.
1. To stop the cooling unit, press the ENTER key until the cursor is on the Operation > On/Standby menu
item.
2. Press the ENTER key again to show the toggle state arrow to the right of Operation.
3. Use the up and down arrow keys to change from On to Standby.
See “Path: Main > Operation > Limit Access” on page 11 if you are prompted to enter a
password before changing the On/Standby setting.
4. Press the ENTER key again to change the setting to Standby. The cooling unit will enter the standby
mode.
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General Configuration
The configuration options are set during the commissioning of the cooling units in the cooling group.
NOTE: All changes to settings must be performed by qualified personnel.
Cooling unit configuration
Path: Main > Configure Unit > General
Capacity: Set the cooling capacity of the cooling unit:
– Auto: The cooling unit automatically controls its output under normal (default) conditions.
– Max: The cooling unit runs at full capacity.
NOTE: Normal checks for cooling failures are disabled in the Max mode.
Start-up Dly: Enter a value for the delay. The start-up delay begins when the cooling unit is started and
initialized. The cooling unit cannot begin operation until this delay expires. Use the start-up delay to restart
equipment sequentially in your room after a scheduled downtime or a power outage.
Idle on Fail: When set to Yes, the cooling unit will enter idle mode if the cooling unit is unable to supply
conditioned air. Set to No to disable the cooling unit from entering idle mode if a Cooling Failure is detected.
Idle On Leak: When set to Yes, the cooling unit will enter idle mode if a Water Detection Fault activates. Set to
No to disable the cooling unit from entering idle mode if a leak is detected.
NOTE: The leak sensor (part number AP9325) is optional.
NOTE: There are three alarms that will cause the cooling unit to enter idle mode:
• Water Detection Fault (when Idle On Leak is set to Yes)
• Condensate Pan Full
• Cooling Failure (when Idle On Fail is set to Yes)
Bypass Vlve (Bypass Valve): Select the setting that matches the physical status of the bypass valve (open or
closed).
Fluid Cal: Causes the input valve to stay fully open to facilitate adjusting water flow through multiple cooling
units.
Role Override: Set to ON, forces the cooling unit to be the Primary cooling unit in the group. Set to Auto,
allows the system to choose the role of the cooling unit. Choose ON if you have Runtime Balancing enabled
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Contacts
View the state of input and output contacts
Path: Main > Configure Unit > Discrete I/O
Each cooling unit supports a user-defined input contact and a user-defined output contact. Each contact
monitors a sensor and responds to changes in the state of the sensor (open or closed).
Input State: Indicates the actual state of the input contact (open or closed). A cooling unit is On when the state
is normal and in Standby when the state is not normal.
Output State: Indicates the actual state of the output contact (open or closed). An alarm will cause the output
contact to change from the normal state.
Edit the normal state of input and output contacts
Path: Main > Configure Unit > Discrete I/O > Normal State
You can set input contacts to cause alarm conditions based on a user-defined normal state. Output contacts
can map internal alarms and events to outside devices.
Input Norm: Set the normal state of the contact (open or closed). The cooling unit changes its operating mode
to Standby when the actual state differs from the normal state.
Output Norm: Set the normal state of the contact (open or closed). If the state of an alarm or event mapped to
this contact changes from the normal state, the contact also changes state.
Output Src: Define the type of output alarm, either Any Alrm or Critical, that causes the output to change
from its normal state.
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Cooling Group Configuration
Use the configuration settings to add cooling units to the group and to define group operation. The system
automatically assigns the state of Backup to units in the group. A unit whose Role Override setting is set to ON
will automatically be set as a Primary cooling unit. A unit in the Standby or Failed state is not considered a
potential backup unit. The system periodically reviews the state of the units to maintain the proper number of
ON and Backup units. If no units are available to assign to the Backup role, then the No Backup Units Available
alarm is initiated.
NOTE: All changes to settings must be performed by qualified personnel.
Configure the cooling group
Path: Main > Configure Group
The Configure Group menu contains settings that identify the number of cooling units installed in this cooling
group and the physical arrangement of those cooling units.
Num Units: Enter the number of cooling units in this cooling group. Up to 12 cooling units can be joined
together to work as a single cooling group.
Type: Set the rack deployment strategy for the cooling units of this cooling group.
• In-Row: Air flow is not ducted. Hot aisle air is cooled, then shared by all loads in the row.
• RACS: (Rack Air Containment System). Air flow in the enclosure is controlled by a ducting system fitted
to the enclosure.
• HACS: (Hot Aisle Containment System). Air flow in the room is controlled by enclosing the hot air aisle.
The loads share an enclosed common hot aisle.
%Glycol: The percentage of glycol used by the Cooling Group to cool the environment. Only qualified service
personnel should make changes to this setting.
Fan Cntrl: This selection allows air flow to be controlled automatically by the cooling unit or manually by user-
selected fan speed preference.
• Auto: Air flow is automatically controlled by the cooling unit.
• Manual: The air flow is fixed to the value of the Fan Speed Preference property. See “Fan Spd: Set the
fan speed preference that will give you the desired temperature difference (DT). Each fan speed
provides an approximate DT between the supply air from the Rack PDU and the air returned from the
rack.” on page 18 for more information.
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Identify the cooling unit
Path: Main > Set Identification
The Set Identification menu contains settings that identify the name and location of the cooling unit.
Unit Id: Assign a unique identification number to this cooling unit. Range: 1 through 12.
Name: Assign a Name, up to 40 alpha-numeric characters, to the cooling unit.
Location: Enter the Location, up to 40 alpha-numeric characters, of the cooling unit.
NOTE: Only the first 19 characters (of the 40 that are possible to enter) will display on the display interface.
You must use Telnet, the Control console or the Web to access all 40 characters. See “Web interface” on
Configure Modbus
Path: Main > Configure Modbus
Use the Configure Modbus menu to set up communications between the cooling unit and the building
management system.
Modbus: Enable or disable Modbus communication protocol.
Target Id: Each Modbus device must have a unique target identification number. Enter a unique number for
this cooling unit.
Baud Rate: Set either 9600 bps or 19200 bps.
Fixed settings: 8 data bits, no parity, 1 stop bit. These settings cannot be modified.
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Control the Environment
The primary function of the cooling unit is to cool air from the hot aisle and deliver it to the cold aisle at the
temperature setpoint. The control strategies employed by the cooling unit depend upon the deployment
strategy of the cooling group.
In an in-row environment, the cooling unit supplies constant-temperature supply air to the common cold aisle.
The fan speed is modulated to ensure that the desired volume of air reaches the IT equipment. The fan speed
is determined by the difference between the cooling setpoint and the maximum rack air inlet temperature.
In a HACS or RACS environment, the cooling unit neutralizes the heat accumulated in the common hot aisle
and expels it back into the surrounding environmental space while maintaining the desired temperature in the
cold aisle.
How the Cool mode works
Cool: Cooling control is varied based on configuration:
• InRow: The equipment maintains the supply air temperature setpoint by regulating the flow of chilled
water through the cooling coil. The evaporator fan speed is controlled by comparing the rack inlet
temperature to the cooling setpoint. As the rack temperature increases compared to the cooling setpoint,
the fans increase output to maintain the setpoint. As rack temperature decreases compared to the
cooling setpoint, the fans decrease output to maintain the setpoint.
• RACS/HACS: The supply air setpoint is maintained the same way as with the InRow configuration. The
fan speed is controlled by the fan speed preference setting. The fan speed can be selected based on the
temperature differential across the cooling unit. As actual supply and return temperatures deviate from
the fan speed preference setting, the fan speed increases to bring the temperature difference back down
to the setpoint or decreases fan output to increase the unit temperature differential.
Fluid Calibration Mode: Runs the cooling unit with the valve fully open and at minimum fan speed. This
special mode is typically used to balance the fluid flow in multiple units or in one unit. This mode generates a
critical alarm. The cooling unit will take some time to return to normal operation once the Fluid Calibration Mode
is turned off.
See Supply Air and Return Air on page 24 for more information.
Setpoints
Path: Main > Set Group Setpoints
A setpoint is the target value that a cooling group tries to maintain in the rack. The default setpoints are
appropriate for most cooling applications.
The setpoints for each mode must be within the following ranges:
• Cool: 18.0–25.0°C (64.4–90.0°F)
• Supply Air: 17.0–23.0°C (59.0–86.4°F)
NOTE: The Supply Air setting is defined when the cooling group is commissioned. This task is
performed by authorized personnel only.
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NOTE: If the Supply Air setpoint is greater than the Cool setpoint, the cooling unit triggers an alarm
and resets the Supply Air setpoint to equal the Cool setpoint.
• Fan Spd: Set the fan speed preference that will give you the desired temperature difference (DT). Each
fan speed provides an approximate DT between the supply air from the Rack PDU and the air returned
from the rack.
–Low = 16.7°C (30°F) DT (60% of maximum fan speed)
– Med-Low = 13.9°C (25°F) DT (70% of maximum fan speed)
– Med = 11.1°C (20°F) DT (80% of maximum fan speed)
– Med-High = 6.3°C (15°F) DT (90% of maximum fan speed)
– High = 5.6°C (10°F) DT (100% of maximum fan speed)
NOTE: The cooling group will automatically override this fan speed setting and adjust the fan speed
to provide optimum cooling for the environment as needed.
PID settings
Path: Main > Set Group PIDs
The Proportional plus Integral plus Derivative (PID) loop controls the output of the fans.
NOTE: All changes to settings must be performed by qualified personnel.
Gain (P): The proportional multiplier (gain) for this mode or actuator. The proportional multiplier adjusts for the
difference (error) between the measured value and the setpoint.
Rate (I): The integral multiplier (reset rate) for this mode or actuator. The integral multiplier adjusts for error
measurement and the amount of time that the error has existed. The integral multiplier adds to or subtracts
from the output in small increments to correct for the offset error caused by the proportional contribution.
Deriv (D): The derivative multiplier (derivative) for this mode or actuator. The derivative multiplier adjusts the
output for rapid changes in the error, correcting for the rate of change of the error over time.
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Tune the PID loop
Tune the PID loop to optimize the performance of the cooling group.
NOTE: This procedure is to be performed by Schneider Electric authorized personnel only. The PID loop must
be tuned after the equipment in the room is installed and running. The loop should be tuned periodically to
account for changes in the room load.
1. Adjust the integral and derivative constants to zero and the proportional constant to 1.0.
2. Set the temperature setpoint value and start the cooling group.
3. When the temperature reaches a stable value, increase the proportional constant by 0.5. If the
temperature does not respond to this change, adjust the setpoint.
4. Repeat step 3 until the temperature value starts to oscillate and the peak amplitude of the oscillations is
constant.
5. Note the time, in minutes, between the peaks of the oscillations. This is the Ultimate Period, P
U.
6. Note the value of the proportional constant. This is the Ultimate Gain, G
U.
7. Compute the PID constants using the table below. Use the equations for that control method in the row
to compute the values for each constant.
Control Method Proportional
Integral
Derivative
P
0.5*G
–
–
–
U
P + I
P + I + D
0.45*G
0.54*G /P
U
U
U
0.6*G
1.2*G /P
U U
0.075*G *P
U
U
U
8. Set each constant according to these calculations.
You may need to further tune the PID loop in the following ways to account for changes in the room load:
Loop Behavior
Slow response to temperature changes
PID Tuning Correction
Increase the proportional multiplier or increase the
derivative multiplier.
Overcooling/undercooling after changes in the room Increase the derivative or the proportional multiplier.
load or changes in setpoint
Environmental temperature never reaches the
setpoint
Increase the integral multiplier.
Overcooling/undercooling on constant room load
Decrease the integral multiplier.
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Run hours
The cooling unit records the number of hours each of its components has operated. When a component is
replaced, use the Reset Run Hours option to reset the run hours for the displayed component to zero.
Path: Main > View Run Hours
Components:
• Air Filter
– Reset Run Hours
NOTE: Replace air filters with Schneider Electric air filters only.
• Fans
– Fan Number
• Reset Run Hours
• Condensate Pump
– Reset Run Hours
Thresholds
Set alarms to alert you to threshold violations.
Path: Main > Set Unit Thresholds
When the monitored input violates the unit threshold, an alarm will occur. Set thresholds for the following
sensors:
• Rack Inlet: The temperature of the air entering the rack at the rack inlet sensor.
• Supply Air: The average temperature of the air output from the cooling unit, measured by the upper and
lower supply air temperature sensors.
• Return Air: The temperature of the air entering the cooling unit at the temperature sensor.
• Inlet Fluid: The temperature of the chilled water entering the cooling unit
Service intervals
Path: Main > Service Intervals
The service interval depends on environmental cleanliness. Each component interval setting has an alarm. If
enabled, the alarm will sound when the component interval has elapsed. The alarm is cleared by selecting
Clear Alarms in the main menu. Set the number of weeks to service the following:
• Air Filter Interval: The default is 18 weeks.
• Condensate Pump Interval: The default is 52 weeks.
• Fan Interval: The default is 52 weeks.
NOTE: The Air Filter interval alarm is enabled by default. The Condensate Pump and Fan interval
alarms are disabled by default.
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Display Settings
Set display interface settings, including time and date, units, passwords, and time-out. You can also adjust the
contrast, key click, beeper volume, and beep on alarm settings.
Password & timeout
Path: Main > Set Password
NOTE: The default user password is apc (lowercase). See “Password entry” on page 11 for more information
on how to enter the password.
Change passwords: Set the Admin and Device passwords.
1. Move the selector arrow next to the Change Passwords option and press the ENTER key.
2. Select the password to change (either Admin or Device).
3. Enter a new password (up to 8 characters).
4. Press the ENTER key to confirm.
Timeout: Set the length of time which can elapse when no keys are pressed before the display interface
returns to the scrolling screen status. The password must then be entered to regain access.
Invalidate: Override the password timeout and require password entry immediately.
Date & time
Path: Main > Set Date & Time
Set the time: Enter the correct time, and press the ENTER key. The Time is displayed on some status screens
and is also used in the alarm and event logs to time-stamp events.
Set the date: Enter the day, month, and year, and press the ENTER key. The Date is displayed on some status
screens and is also used in the alarm and event logs to date-stamp events.
Set the format: Use the up or down arrow key to select the date Format setting.
• mm/dd/yyyy (11/16/2007) (Default)
• yyyy-mm-dd (2007-11-16)
• dd-mmm-yy (16-Nov-07)
• mmm-dd-yy (Nov-16-07)
• dd.mm.yyyy (16.11.2007)
Adjust display
Path: Main Menu > Configure Display
Contrast: Adjust the visibility of the screen text. Lower numbered settings provide darker text; higher numbers
provide lighter text. Settings range from 0–7.
Key Click: Enable or disable an audible tone every time a key is pressed on the display interface.
Beeper Volume: Set the volume of the display interface alarm tone, and for the audible tone that sounds every
time a key is pressed on the display interface.
Beep On Alarm: Set the cooling unit to sound an audible tone every 30 seconds when a new alarm occurs.
Silence the audible tone by pressing any key on the display interface. When the alarm clears itself, the tone will
stop on its own.
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Network Configuration
The cooling unit is shipped with a Network Management Card (NMC) that enables you to manage the cooling
unit over your network. Configure the network settings for the Network Management Card from the display
interface. The management card allows remote control and configuration of the cooling unit.
Configure the network
Path: Main > Configure Network
MAC Address: Displays the unique network identifier assigned to the Network Management Card of the
cooling unit installed in the cooling unit at the factory.
IP Address: You will be prompted to enter an Admin password. Enter the password and press ENTER to
return to the IP screen. Press ENTER again to change the following settings for Manual boot mode only.
• IP: Enter the IP address assigned to the Network Management Card of the cooling unit.
• SM: Enter the subnet mask for the Network Management Card of the cooling unit.
• GW: Enter the default gateway for the Network Management Card of the cooling unit.
Boot Mode: Set the method by which the Network Management Card of the cooling unit will acquire its network
settings.
• Manual: Enter the IP Address, subnet mask, and default gateway using the IP Address menu.
• BOOTP: Set the Network Management Card of the cooling unit to obtain its network settings from a
BOOTP server.
• DHCP: Set the Network Management Card of the cooling unit to obtain its network settings from a DHCP
server.
By default, DHCP requires an Schneider Electric cookie before it will accept an IP address.
See “DHCP:” on page 32 for more information.
• BOOTPDHCP: Set the Network Management Card of the cooling unit to search for its network settings
from either a BOOTP or a DHCP server.
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View Status Readings
The display interface has several options for viewing the status of the cooling unit, the cooling group to which
the cooling unit belongs, and the environment being controlled. The status readings for the cooling unit are
available under the View Unit Status option in the main menu, and status readings for the cooling group are
available under the View Group Status option on the main menu or on the scrolling status screens.
Scrolling status screens
When the display interface is idle, it scrolls through screens of status information. Press the up or down arrow
key to interrupt the automatic scrolling and view a specific status screen.
Cooling unit status
Path: Main > View Unit Status
View information specific to this cooling unit.
Op Mode (Operating): The cooling unit is in one of the following modes:
• On: The cooling unit is cooling.
• PreStart: The cooling unit is initializing and establishing communication with the controller. During
PreStart, the valve of the cooling unit opens at 35%. The fans will start at 30% and stay on at that rate for
10 minutes.
• Standby: The cooling unit is receiving power but not enabled for cooling.
• Idle: The cooling unit is not operating in normal mode due to active alarms.
For more information, see “Idle On Leak:” on page 13.
Cool Outpt (Output): The actual cooling output of the cooling unit.
Cool Demnd (Demand): The amount of cooling that the heat load currently requires.
Supply Air: The average temperature of the air leaving the cooling unit, as measured by the upper and lower
supply air temperature sensors.
Return Air: The temperature of the air entering the cooling unit.
Max Rack In (Maximum): The highest reading of the three rack inlet temperature sensors determines the rack
temperature.
Power Source: The source of power to the cooling unit.
Rack In #n: The temperature of the air entering the rack at the remote temperature sensor.
Fluid In: The temperature of the chilled water as it enters the cooling coil.
Fluid Out: The temperature of the chilled water as it leaves the cooling coil.
Fluid Flow: The amount of chilled water that flows through the cooling unit.
Fluid Vlv Pos (Fluid Valve Position): The position of the valve that controls how much chilled water enters
the cooling unit.
Air Flow: The amount of air required to maintain the setpoint temperature.
Fan Speed: The speed of the fans that regulate the air flow through the cooling unit.
Filter DP (Differential Pressure): The filter differential pressure displayed in the Water column in inches or in
pascals.
Sply Humid (Supply Humidity): The humidity of the air leaving the cooling unit.
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Cooling group status
Path: Main > View Group Status
View information about the cooling group.
Max Rack (Maximum): The highest rack temperature reported by any cooling unit in the cooling group.
Min Rack (Minimum): The lowest rack temperature reported by any cooling unit in the cooling group.
Air Flow: The combined airflow output of the cooling units in the cooling group.
Cool Output: The combined output of the cooling group.
Cool Demnd (Demand): The cooling output required to meet the current heat load of the conditioned space.
Cool Setpt (Setpoint): The temperature you set to maintain the room environment.
About the cooling unit
Path: Main > About InRow RC
View identifying information that is helpful when obtaining service:
• Model: Model number
• S/N: Serial number
• F/W: Display interface firmware revision
• H/W: Hardware revision
• Made: Date of manufacture
• RP APP: Application version
• AOS Ver: Operating system version
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Event Log
The event log saves status information and a message each time a change in the cooling group is detected.
Alarms and events are recorded in the log and displayed on the active alarms screen. Status events
(informational) and system configuration changes are only displayed in the event log.
View event log
Path: Main > View Event Log
The event log keeps a record of all alarms and events. The screen displays the following:
• The name of the event.
• The time and date the event occurred.
Use the arrow keys to scroll through the list of events and display the date and time for each event.
Clear event log
Path: Main > Clear Event Log
A confirmation screen is displayed when you select this option. Enter the Admin password to erase the log.
Select YES to erase all of the events in the log. Select NO to return to the main screen.
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Respond to Alarms
When an alarm is triggered, the cooling unit alerts you through the display by the following methods:
• Active alarm screen entry on scrolling status screens
• LEDs on the front panel display
• An optional audible alarm every 30 seconds, if enabled
View active alarms
Path: Main > View Alarms
The View Alarms screen provides the number of alarms, the severity, and a brief description of the alarm.
Press the arrow keys to view the rest of the list.
Clear active alarms
Path: Main > Clear Alarms
A confirmation screen is displayed when you select this option. Enter the Admin password to clear the alarm
list. Select YES to clear all of the alarms in the list. Select NO to return to the main screen. If the conditions that
caused the alarm still exist, those conditions cause the alarm to be regenerated.
Alarm messages and suggested actions
Alarm Message
Severity
Warning • A hardware failure exists.
• For assistance, contact Customer Support.
Warning • Clean or replace the air filter.
• If the problem persists, contact Customer Support.
Action Required
Air Containment Pressure
Sensor Fault
Air Filter Clogged
Air Filter Run Hours Violation
Warning • Reset the Air Filter Run Hours after the air filter is cleaned or
replaced.
A-Link Isolation Relay Fault
Coil Fluid Valve Actuator Fault
Critical • For assistance, contact Customer Support.
Critical • A hardware failure exists.
• For assistance, contact Customer Support.
Check Condensate
Management System Exists
Warning • The condensate pump is running.
• For assistance, contact Customer Support.
Condensate Pan Full
Critical • Make sure the floats are operating correctly.
• Clear debris from the condensate pan and drain lines.
• Replace the sensor.
• For assistance, contact Customer Support.
Condensate Pump Run Hours
Violation
Warning • At the display interface, reset the Condensate Pump Run Hours in
the View Run Hours screen after the appropriate maintenance for the
device has been performed.
Containment Differential
Pressure High Alarm
Warning • Check the cooling unit airflow for obstruction.
• Clean or replace the air filter and reset the Air Filter run hours in the
View Run Hours screen.
• If the problem persists, contact Customer Support.
Cooling Failure
Critical • Make sure the chiller is operating properly.
• For assistance, contact Customer Support.
Entering Fluid High
Temperature Violation
Warning • Make sure the chiller is operating properly.
• At the display interface, make sure the Inlet Fluid threshold is set
correctly in the Set Unit Threshlds screen.
• If the problem persists, contact Customer Support.
Entering Fluid Temperature
Sensor Fault
Warning • Make sure the sensor is connected properly.
• If the problem persists, contact Customer Support.
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Alarm Message
Severity
Critical • A hardware failure exists.
• For assistance, contact Customer Support.
Warning • A hardware failure exists.
• For assistance, contact Customer Support.
Action Required
External Communication Fault
Fan #n Fault
Fan #n Run Hours Violation
Warning • At the display interface, reset the Fans run hours in the View Run
Hours screen after the appropriate maintenance for the device has
been performed.
Filter Sensor Fault
Warning • A hardware failure exists.
• For assistance, contact Customer Support.
Fluid Calibration Active
Fluid Flowmeter Comm Fault
Fluid Flowmeter Fault
Critical • The cooling unit is in fluid calibration mode. See “Fluid Calibration
Mode:” on page 17 for more information.
Warning • Make sure the sensor is connected properly.
• If the problem persists, contact Customer Service.
Critical • If a leak exists, fix the problem.
• Make sure the supply and return chilled water pipes are connected
properly, fluid is flowing from the chiller to the unit, and the electrical
connections to the flowmeter are correct.
• If the problem persists, contact Customer Support.
Group Communication Lost
Internal Communication Fault
Warning • Make sure the number of cooling units in the group is configured
properly, and the A-Link connections between cooling units are correct.
• Make sure the system is receiving power and is connected properly.
• If the problem persists, contact Customer Support.
Critical • A hardware failure exists.
• For assistance, contact Customer Support.
Leaving Fluid Temperature
Sensor Fault
Warning • Make sure the sensor is connected properly.
• If the problem persists, contact Customer Support.
No Backup Units Available
Warning • Check to make sure cooling units in the group are set to
Configure Unit > General > Role Override > Auto and that cooling
units are available (not in a failed state).
• For assistance, contact Customer Support.
On Standby: Input Contact
Fault
Warning • At the display interface, make sure the Input Normal State is defined
correctly in the Set Unit Threshlds screen.
• Clear the problem that caused the input contact switch to change from
its normal state.
• If the problem persists, contact Customer Support.
Power Supply Feed A Fault
Warning • Make sure the power source is connected properly and the power is
on.
• If the problem persists, contact Customer Support.
Rack Inlet #n High
Temperature Violation
Critical • Make sure the temperature sensor is connected and placed properly.
• Make sure the Rack Inlet threshold is set correctly in the Set Unit
Threshlds screen.
• If the problem persists, contact Customer Support.
Rack Inlet #n Temperature
Sensor Fault
Critical • Make sure the sensors are connected properly.
• If the problem persists, replace the sensor, or contact Customer
Support.
Return Air High Temperature
Violation
Warning • Make sure the Return Air threshold is set correctly in the Set Unit
Threshlds screen.
• If the problem persists, contact Customer Support.
Return Air Sensor Fault
Critical • Make sure the sensor is connected properly.
• Replace the sensor.
• If the problem persists, contact Customer Support.
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Alarm Message
Severity
Action Required
Supply Air High Temperature
Violation
Warning • Make sure the temperature sensor is connected properly.
• Make sure the Supply Air threshold is set correctly in the Set Unit
Threshlds screen.
• If the problem persists, contact Customer Support.
Supply Air Sensor Fault (upper
or lower)
Critical • Make sure the faulty sensor is connected properly.
• Replace the sensor.
• If the problem persists, contact Customer Support.
Supply Humidity Sensor Fault
Water Detection Fault
Critical • Make sure the sensor is connected properly.
• Replace the sensor.
• If the problem persists, contact Customer Support.
Warning • Identify and isolate the source of the leak.
• For assistance, contact Customer Support.
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Network Management Card
Quick Configuration
The cooling unit is shipped with a Network Management Card that enables the cooling unit to be managed over
a network. Configure the Network Management Card to control this cooling unit through a network.
Overview
You must configure the following TCP/IP settings before the Network Management Card can operate on a
network:
• IP address of the Network Management Card
• Subnet mask
• Default gateway
NOTE: Never use the loopback address (127.0.0.1) as the default gateway for the Network Management Card.
Doing so will disable the card and will require you to reset TCP/IP settings to their defaults using a local serial
login.
NOTE: If a default gateway is unavailable, use the IP address of a computer that is located on the same subnet
as the Network Management Card and that is usually running. The Network Management Card uses the default
gateway to test the network when traffic is very light.
See “Watchdog Features” in the “Introduction” of the User Guide for more information about
the watchdog role of the default gateway.
TCP/IP configuration methods
Use one of the following methods to define the TCP/IP settings needed by the Network Management Card:
• Schneider Electric Device IP Configuration Wizard (See “Schneider Electric Device IP Configuration
Schneider Electric Device IP Configuration Wizard
®
You can use the Schneider Electric Device IP Configuration Wizard at a computer running Microsoft
®
®
®
Windows 2000, Windows Server 2003, or Windows XP to configure a Network Management Card.
NOTE: Most software firewalls must be temporarily disabled for the Wizard to discover unconfigured Network
Management Cards.
To configure one or more Network Management Cards from a user configuration file, see the User
1. Insert the Utility CD into a computer on your network.
2. If autorun is enabled, the user interface of the CD starts when you insert the CD. If autorun is not
enabled, open the file contents.htm on the CD.
3. Select the Device IP Configuration Wizard from the main menu.
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4. When the Wizard discovers the unconfigured Network Management Card, follow the on-screen
instructions.
NOTE: If you leave the Start a Web browser when finished option enabled, you can use Schneider
Electric for both the user name and password to access the Network Management Card through your
browser.
.ini file utility
You can use the .ini file export utility to export .ini file settings from configured Network Management Cards to
one or more unconfigured Network Management Cards.
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BOOTP & DHCP configuration
The default TCP/IP configuration setting, BOOTP & DHCP, assumes that a properly configured BOOTP or
DHCP server is available to provide TCP/IP settings to Network Management Cards. The Network
Management Card first attempts to discover a properly configured BOOTP server, and then a DHCP server. It
repeats this pattern until it discovers a BOOTP or DHCP server.
A user configuration (.ini) file can function as a BOOTP or DHCP boot file. For more information, see
the TCP/IP configuration section of the User Guide, available from the Utility CD or the Schneider
BOOTP: For the Network Management Card to use a BOOTP server to configure its TCP/IP settings, it must
find a properly configured RFC951-compliant BOOTP server.
1. In the BOOTPTAB file of the BOOTP server, enter the MAC address of the Network Management Card,
and the IP addresses of the subnet mask, and default gateway, and an optional bootup file name. Look
for the MAC address on the display interface (Path: Main > Configure Network) or on the label on the
back of the Network Management Card.
2. When the Network Management Card reboots, the BOOTP server provides it with the TCP/IP settings.
– If you specified a bootup file name, the Network Management Card attempts to transfer that file from
the BOOTP server using TFTP or FTP. The Network Management Card assumes all settings
specified in the bootup file.
– If you did not specify a bootup file name, you can configure the other settings of the Network
Management Card remotely through its Web interface or control console; user name and password
are both Schneider Electric, by default.
See your BOOTP server documentation to create a bootup file.
DHCP: You can use a RFC2131/RFC2132-compliant DHCP server to configure the TCP/IP settings for the
Network Management Card.
This section summarizes communication between the Network Management Card and a DHCP
server. For more details about how a DHCP server can configure the network settings for a Network
Management Card, see “DHCP Configuration” in the User Guide.
1. A Network Management Card sends out a DHCP request that uses the following to identify itself:
– A Vendor Class Identifier (APC by default)
– A Client Identifier (by default, the MAC address value of the Network Management Card)
– A User Class Identifier (by default, the identification of the application firmware of the Network
Management Card)
2. A properly configured DHCP server responds with a DHCP offer that includes all of the settings that the
Network Management Card needs for network communication. The DHCP offer also includes the
Vendor Specific Information option (DHCP option 43). By default, the Network Management Card will
ignore DHCP offers that do not encapsulate the Schneider Electric cookie in the Vendor Specific
Information option using the following hexadecimal format:
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Option 43 = 01 04 31 41 50 43
where
– the first byte (01) is the code
– the second byte (04) is the length
– the remaining bytes (31 41 50 43) are the Schneider Electric cookie
See your DHCP server documentation to add code to the Vendor Specific Information
option.
To change the control console DHCP Cookie Is setting, use the Advanced option in the
To disable the requirement that a DHCP offer include the Schneider Electric cookie, use
the DHCP Cookie Is setting in the control console:
Network > TCP/IP > Boot Mode > DHCP only > Advanced > DHCP Cookie Is.
Local access to the control console
You can use a computer connected to the serial port on the main board holding the Network Management Card
to access the control console.
1. Select a serial port at the local computer, and disable any service that uses that port.
2. Use the configuration cable to connect the selected port to the serial port on the main board holding the
Network Management Card. Use either 940-0103, the 6-ft (1.8-m) cable that came with your UPS, or
AP9804 (990-1524), the 15-ft (4.6-m) cable available from Schneider Electric.
3. Run a terminal program (such as HyperTerminal) and configure the selected port for 9600 or 19200 bps,
8 data bits, no parity, 1 stop bit, and no flow control. Save the changes.
4. Press ENTER to display the User Name prompt.
5. Use apc for the user name and password.
Remote access to the control console
From any computer on the same subnet as the Network Management Card, you can use ARP and Ping to
assign an IP address to a Network Management Card, and then use Telnet to access the control console of that
Network Management Card and configure the needed TCP/IP settings.
NOTE: After the IP address of the Network Management Card is configured, you can use Telnet without first
using ARP and Ping to access that Network Management Card.
1. Use the MAC address for the Network Management Card in the ARP command to define the IP
address. For example, to define an IP address of 156.205.14.141 for a Network Management Card that
has a MAC address of 00 c0 b7 63 9f 67, use one of the following commands:
– Windows command format:
arp -s 156.205.14.141 00-c0-b7-63-9f-67
– LINUX command format:
arp -s 156.205.14.141 00:c0:b7:63:9f:67
NOTE: The MAC address is available on the display interface at:
Path: Main > Configure Network or look at the label on the back of the Network Management
Card for the MAC address.
2. Use Ping with a size of 113 bytes to assign the IP address defined by the ARP command. For the IP
address defined in step 1, use one of the following Ping commands:
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– Windows command format:
ping 156.205.14.141 -l 113
– LINUX command format:
ping 156.205.14.141 -s 113
3. Use Telnet to access the Network Management Card at its newly assigned IP address. For example:
telnet 156.205.14.141
4. Use apc for both user name and password.
Control console
1. Choose Network from the Control Console menu.
2. Choose TCP/IP from the Network menu.
3. If you are not using a BOOTP or DHCP server to configure the TCP/IP settings, select the Boot Mode
menu and then select Manual boot mode.
4. Set the System IP, Subnet Mask, and Default Gateway address values. (Changes will take effect
when you log out.)
5. Press ENTER to return to the TCP/IP menu.
6. Press CTRL+C to exit to the Control Console menu.
7. Log out (option 4 in the Control Console menu).
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Access a Configured Network Management Card
Overview
After the Network Management Card is running on your network, you can access the configured Network
Management Card through the following interfaces:
• Web interface (HTTP or HTTPS protocol)
• Telnet or Secure SHell (SSH)
• SNMP
• FTP or Secure CoPy (SCP) to upgrade firmware
• Modbus
For more information on the interfaces, see the User Guide.
Web interface
®
®
®
Use Microsoft Internet Explorer (IE) 5.5 and higher (on Windows operating systems only), Mozilla-based
®
®
browsers that support Firefox 1.x (on all operating systems), or Netscape 7.x and higher (on all operating
systems) to access the Web interface of the cooling unit. Other commonly available browsers also may work
but have not been fully tested by Schneider Electric.
You can use either of the following protocols when you use the Web interface:
• The HTTP protocol (enabled by default), which provides authentication by user name and password but
no encryption.
• The HTTPS protocol, which provides extra security through Secure Sockets Layer (SSL); encrypts user
names, passwords, and data being transmitted; and authenticates the Network Management Card by
means of digital certificates.
To access the Web interface and configure the security of your device on the network:
1. Address the Network Management Card by its IP address or DNS name (if configured).
2. Enter the user name and password (by default, apc and apc for an Administrator).
3. To enable or disable the HTTP or HTTPS protocols, use the Network menu on the Administration tab,
and select the access option under the Web heading on the left navigation menu.
For more information on selecting and configuring network security, see the Security
Handbook, available on the Utility CD or from the Schneider Electric Web site,
Telnet and SSH
You can access the control console through Telnet or Secure SHell (SSH), depending on which is enabled.
Select the Administration tab, the Network option on the top menu bar, and then the access option under
Console on the left navigation menu. By default, Telnet is enabled. Enabling SSH automatically disables
Telnet.
Telnet for basic access: Telnet provides the basic security of authentication by user name and password, but
not the high-security benefits of encryption. To use Telnet to access the control console of the Network
Management Card:
1. At a command prompt, use the following command line, and press ENTER:
telnet address
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As address, use the IP address of the Network Management Card or DNS name (if configured).
2. Enter the user name and password (by default, apc and apc for an Administrator, or device and apc for
a Device User).
SSH for high-security access: If you use the high security of SSL for the Web interface, use Secure SHell
(SSH) for access to the control console. SSH encrypts user names, passwords, and transmitted data.
The interface, user accounts, and user access rights are the same whether you access the control console
through SSH or Telnet, but to use SSH, you must first configure SSH and have an SSH client program installed
on your computer.
See the User Guide for more information on configuring and using SSH.
Simple Network Management Protocol (SNMP)
®
SNMPv1 only: After you add the PowerNet MIB to a standard SNMP MIB browser, you can use that browser
to access the Network Management Card. All user names, passwords, and community names for SNMP are
transferred over the network as plain text. The default read community name is public; the default read/write
community name is private.
SNMPv3 only: For SNMP GETs, SETs, and trap receivers, SNMPv3 uses a system of user profiles to identify
users. An SNMPv3 user must have a user profile assigned in the MIB software program to perform GETs and
SETs, browse the MIB, and receive traps. The default settings are no authentication and no privacy.
NOTE: To use SNMPv3, you must have a MIB program that supports SNMPv3.
NOTE: The Network Management Card supports only MD5 authentication and DES encryption.
SNMPv1 and SNMPv3: To use StruxureWare Data Center Expert to manage the Network Management Card,
you must have SNMPv1 enabled in the unit interface. Read access allows InfraStruXure devices to receive
traps. Write access is required while you set the InfraStruXure device as a trap receiver.
To enable or disable SNMP access, you must be an Administrator. Select the Administration tab, select the
Network menu on the top menu bar, and use the access option under SNMPv1 or SNMPv3 on the left
navigation menu.
FTP/SCP
You can use FTP (enabled by default) or Secure CoPy (SCP) to transfer downloaded firmware to the Network
Management Card, or to access a copy of the event or data logs of the cooling unit. SCP provides the higher
security of encrypted data transmission and is enabled automatically when you enable SSH.
To use StruxureWare Data Center Expert to manage the Network Management Card, you must have the FTP
Server enabled in the Network Management Card. To enable or disable FTP Server access, you must be an
Administrator. On the Administration tab, select the Network menu on the top menu bar, and use the FTP
server option on the left navigation menu.
In the User Guide, see the following sections:
• To transfer firmware, see “File Transfers.”
• To retrieve a copy of the event or data log, see “Use FTP or SCP to retrieve log files.”
Modbus
Modbus lets you view the Network Management Card through the interface of your building management
system. The Modbus interface supports 2-wire RS-485, plus ground.
NOTE: Modbus can be configured to run at either 9600 or 19200 bps. It is already configured for 8 data bits, no
parity, and 1 stop bit, which are not changeable.
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Recover From a Lost Password
You can use a local computer (a computer that connects to the Network Management Card through the serial
port) to access the control console.
1. Select a serial port at the local computer, and disable any service that uses that port.
2. Connect the provided RS-232 configuration cable to the selected port on the computer and to the RS-
232 console port at the Network Management Card.
3. Run a terminal program (such as HyperTerminal) on your computer and configure the selected port for
9600 bps, 8 data bits, no parity, 1 stop bit, and no flow control.
4. Press ENTER, repeatedly if necessary, to display the User Name prompt. If you are unable to display
the User Name prompt, verify the following:
– The serial port is not in use by another application.
– The terminal settings are correct as specified in step 3.
– The correct cable is being used as specified in step 2.
5. Press the RESET switch. The Status LED will flash alternately orange and green. Press the RESET
button a second time immediately while the LED is flashing to reset the user name and password to
their defaults temporarily.
6. Press ENTER as many times as necessary to redisplay the User Name prompt, then use the default,
apc, for the user name and password. (If you take longer than 30 seconds to log on after the User
Name prompt is redisplayed, you must repeat step 5 and log on again.)
7. From the Control Console menu, select System, then User Manager.
8. Select Administrator, and change the User Name and Password settings, both of which are now
defined as apc.
9. Press Ctrl+C, log off, reconnect any serial cable you disconnected, and restart any service you disabled.
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Maintenance
Monthly Preventive Maintenance
Photocopy the following pages and use them during the maintenance procedures. After they have been
completed, save them for future reference.
Prepared By: ________________________________
Model Number: ______________________________
Serial Number: ______________________________
Date: ______________________________________
Environment
In what type of room is the cooling unit located?
___________________________________________________
Is the cooling unit maintaining the temperature setpoint?
___________________________________________________
Temperature setpoint __________________________________
Is there visible damage to the cooling unit (dents, scratches)?
________________________________________________________________________
________________________________________________________________________
________________________________________________________________________
Check the environmental damage (dirt, dust, debris, liquid stains) around the cooling unit installation area?
________________________________________________________________________
________________________________________________________________________
Record the room temperature near the return of the cooling unit.
Temperature: ________________________________________
Record the alarm history for the last month.
________________________________________________________________________
________________________________________________________________________
________________________________________________________________________
Cleanliness
Check the condition of the air filters. Change if necessary.
Check for accumulation of debris in the drain pan. Clean as required.
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Mechanical
DANGER
HAZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH
• Apply appropriate personal protective equipment (PPE) and follow safe electrical work
practices. See NFPA 70E or CSA Z462.
• This equipment must be installed and serviced by qualified personnel only.
• Turn off all power supplying this equipment before working on or inside the equipment.
• Always use a properly rated voltage sensing device to confirm power is off.
• Replace all devices, doors, and covers before turning on power to this equipment.
Failure to follow these instructions will result in death or serious injury.
Check the fans. All components should be moving freely with no signs of binding or damages.
Verify that the condensate line is flowing freely.
Electrical
DANGER
HAZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH
• Apply appropriate personal protective equipment (PPE) and follow safe electrical work
practices. See NFPA 70E or CSA Z462.
• This equipment must be installed and serviced by qualified personnel only.
• Turn off all power supplying this equipment before working on or inside the equipment.
• Always use a properly rated voltage sensing device to confirm power is off.
• Replace all devices, doors, and covers before turning on power to this equipment.
Failure to follow these instructions will result in death or serious injury.
Inspect the electrical panel for tight connections and for overheated connections from loose contact terminals.
Confirm the incoming main voltage matches the cooling unit nameplate. The measurement should be within 10%
of the nameplate listing.
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Quarterly Preventive Maintenance
* Perform all the Monthly Preventive Maintenance items and the items below.
Prepared By: _________________________________
Model Number: _______________________________
Serial Number: _______________________________
Date: ______________________________________
Mechanical
DANGER
HAZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH
• Apply appropriate personal protective equipment (PPE) and follow safe electrical work
practices. See NFPA 70E or CSA Z462.
• This equipment must be installed and serviced by qualified personnel only.
• Turn off all power supplying this equipment before working on or inside the equipment.
• Always use a properly rated voltage sensing device to confirm power is off.
• Replace all devices, doors, and covers before turning on power to this equipment.
Failure to follow these instructions will result in death or serious injury.
Verify that the fan hardware is tight.
Clean the condensate drain line.
Clean the dust from door perforations.
Clean the dust from fan bezels.
Functional
Verify that the cooling operation mode is functioning properly.
Semi-Annual Preventive Maintenance
* Perform all the Monthly Preventive Maintenance items and the items below.
Prepared By: _________________________________
Model Number: _______________________________
Serial Number: _______________________________
Date: ______________________________________
Cleanliness
Check the cleanliness of the evaporator coil. Clean if required.
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Troubleshooting
Problem
Possible Cause
Corrective Action
Controls erratic or
inoperative
• Inlet temperature to cooling
unit is higher than rated
maximum temperature
• Reduce the load or add additional cooling equipment.
Fans fail to start
• Cooling unit shutdown due to • Temporarily remove the input contact cable, if it is
an external command
connected.
• Single fan fails to start
• Verify that the fan circuit breaker is ON.
Cooling unit cannot • Improper placement of remote • Verify that the remote temperature sensor is properly
obtain setpoint
temperature sensor
located in the cold aisle.
• Dirty filter
• Clean the filter.
• Dirty coil
• Clean the coil.
• Valve/actuator malfunction
• Application error
• Fully open the valve.
• Contact Schneider Electric Technical Support.
• Entering water temperature is • Verify that the temperature of the Cooling Unit water supply
too high
is within the specified range.
• Heat load is too far away
• Place the cooling unit closer to the heat load.
Water carryover
• Improper fan speed selected • RACS and HACS modes only: Select the next-highest fan
speed setting. For example, change the fan speed setting
from Low to Med/Low.
• Inlet water temperature is too • Verify that the temperature of the inlet water is within the
low
specified range.
• Room humidity is too
high/low
• Improve room sealing.
Temperature control • Improper placement of remote • Verify that the remote temperature sensor is properly
not tight enough temperature sensor located in the cold aisle.
Water on outside of • Condensate drain hose is not • Verify that the condensate drain hose is properly connected
cooling unit
connected or not properly
to the pump and properly routed outside of the cooling unit.
routed outside the cooling unit • Verify that the condensate drain line does not exceed 5.4 m
(18 ft) lift and 18.3 m (60.0 ft) horizontal run.
• Leak in drain system
• Locate and repair the leak.
• Cooling unit not leveled
properly
• Adjust the leveling feet of the cooling unit.
• Damaged piping insulation
• Identify damaged area and repair the insulation.
• Verify that the actuator is connected properly.
Fluid valve not
responsive
• Actuator not connected
properly
• Actuator and shaft not rotating • Tighten the linkage screw on the actuator shaft.
together
• Rotary switch on the bottom of • Confirm that the rotary switch is pointing toward the front of
the actuator is set incorrectly
the cooling unit.
Display interface not • Display interface not
• Verify that the display interface cable is connected properly.
operational, but
connected properly
cooling unit operates
Incorrect air pressure • False filter clogs
• Verify that the ends of the clear plastic air tubes are not
obstructed.
• Verify that the clear plastic air tubes are connected to the
controller.
• Verify that the clear plastic air tubes are not pinched.
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Problem
Alarms do not show • External monitoring equipment • Confirm that power, if required, is being supplied to the
up on monitoring is not receiving power or is not external equipment.
Possible Cause
Corrective Action
equipment (Customer functioning properly
Output Contact)
• If the cooling unit (+12 V or +24 V) is providing power to the
external equipment, verify that the external equipment is
<50 mA.
• Test the external equipment by bypassing the customer
output contact.
Cooling unit does not • Drive voltage
shut down on
command
• Verify that there is a drive voltage entering the input of the
cooling unit. You may use the available +12 V or +24 V. You
must also use the ground.
No communication
with building
• Improper connection
• Confirm that the cooling unit is connected to the BMS port
and not to the Control port.
management system
(BMS) port
• Make sure that the wire polarity is correct. Using a DC
voltmeter, test the signal with no transmissions in progress.
Expect the voltage at pin 2 to be greater than at pin 1 by at
least 200 mV. Measure the cooling unit with the cable
disconnected, and then measure it again with the cable
connected. If the signal is less than 200 mV, the cooling unit
may be reverse-wired.
• Make sure that every cooling unit has either two sets of
wires in its connector or one set of wires and a terminating
resistor of 100 to 120 ohms.
Cooling units are not • A-Link failure
communicating with
• Verify that the first and last cooling units have one cable and
a terminator.
each other
• Verify that every other cooling unit has two cables.
• Confirm that the A-Link cables are connected to the A-Link
ports and that a network cable is connected to the network
port.
• Verify that the number of cooling units in the cooling group
matches the group number setting.
Output air is 17°C
(62°F) and fans are
running at a very high
rate of speed.
• Upper or lower supply air
sensor
• Either upper or lower supply air temperature sensor has a
fault. Verify that both supply air temperature sensors are
installed and working properly.
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Worldwide Customer Support
Customer support for this or any other product is available at no charge in any of the following ways:
• Visit the Schneider Electric Web site to access documents in the Schneider Electric Knowledge Base
and to submit customer support requests.
Connect to localized Schneider Electric Web sites for specific countries, each of which provides
customer support information.
Global support searching Schneider Electric Knowledge Base and using e-support.
• Contact the Schneider Electric Customer Support Center by telephone or e-mail.
around the world for contact information.
For information on how to obtain local customer support, contact the representative or other distributors
from whom you purchased your product.
As standards, specifications, and designs change from time to time, please ask for confirmation of the information given in this publication.
© 2014 Schneider Electric. All Rights Reserved.
The Schneider Electric logo and InRow are trademarks owned by Schneider Electric Industries S.A.S., or its affiliated companies. All other
trademarks are the property of their respective owners.
990-3237B-001
11/2014
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