Hoshizaki Refrigerator HR24A User Manual

Hoshizaki America, Inc.  
Hoshizaki  
Undercounter Refrigerator  
Model  
HR24A  
SERVICE MANUAL  
“A Superior Degree  
of Reliability”  
Number: 73187  
Issued: 12-7-2011  
Download from Www.Somanuals.com. All Manuals Search And Download.  
IMPORTANT  
This manual should be read carefully before the appliance is serviced. Read  
the warnings and guidelines contained in this booklet carefully as they provide  
essential information for the continued safe use, service, and maintenance of the  
appliance. Retain this booklet for any further reference that may be necessary.  
CONTENTS  
Important Safety Information ................................................................................................. 5  
I. Specifications...................................................................................................................... 7  
A. Electrical and Refrigerant Data ..................................................................................... 7  
B. Storage Capacity and Dimensions................................................................................ 7  
1. Storage Capacity...................................................................................................... 7  
2. Dimensions.............................................................................................................. 8  
II. General Information........................................................................................................... 9  
A. Construction.................................................................................................................. 9  
B. Sequence of Operation ............................................................................................... 10  
1. Sequence Cycles and Shutdown ........................................................................... 10  
2. Sequence Flow Chart............................................................................................ 12  
C. Control Board and Display Module.............................................................................. 13  
1. Control Board Layout ............................................................................................. 14  
2. Display Module Layout .......................................................................................... 14  
D. Cabinet Temperature................................................................................................... 15  
E. Display Module Icons.................................................................................................. 16  
F. Control Panel Lockout.................................................................................................. 16  
G. Alarm Safeties............................................................................................................. 17  
H. Service Menu.............................................................................................................. 18  
III. Technical Data ................................................................................................................ 24  
A. Refrigeration Circuit .................................................................................................... 24  
B. Wiring Diagram............................................................................................................ 25  
IV. Service Diagnosis........................................................................................................... 26  
A. Diagnostic Procedure.................................................................................................. 26  
B. Control Board Check................................................................................................... 29  
C. Thermistor Check........................................................................................................ 30  
D. Diagnostic Chart ......................................................................................................... 31  
V. Replacement of Components .......................................................................................... 33  
A. Service for Refrigerant Lines....................................................................................... 33  
1. Refrigerant Recovery ............................................................................................. 33  
2. Brazing .................................................................................................................. 34  
3. Evacuation and Recharge (R-134a) ...................................................................... 34  
B. Important Notes for Component Replacement............................................................ 35  
C. Door Reversal ............................................................................................................. 36  
3
Download from Www.Somanuals.com. All Manuals Search And Download.  
VI. Cleaning and Maintenance Instructions ......................................................................... 37  
A. Cleaning...................................................................................................................... 37  
1. Exterior................................................................................................................... 37  
2. Cabinet Interior...................................................................................................... 37  
3. Door Gasket .......................................................................................................... 37  
4. Shelves.................................................................................................................. 37  
B. Maintenance................................................................................................................ 37  
VII. Preparing the Appliance for Periods of Non-Use........................................................... 38  
VIII. Disposal........................................................................................................................ 39  
4
Download from Www.Somanuals.com. All Manuals Search And Download.  
Important Safety Information  
Throughout this manual, notices appear to bring your attention to situations which could  
result in death, serious injury, damage to the appliance, or damage to property.  
WARNING  
NOTICE  
IMPORTANT  
Indicates a hazardous situation which could result in death or  
serious injury.  
Indicates a situation which could result in damage to the  
appliance or property.  
Indicates important information about the use and care of the  
appliance.  
WARNING  
This appliance should be destined only to the use for which it has been expressly  
conceived. Any other use should be considered improper and therefore dangerous.  
The manufacturer cannot be held responsible for injury or damage resulting from  
improper, incorrect, and unreasonable use. Failure to service and maintain the  
appliance in accordance with this manual will adversely affect safety, performance,  
component life, and warranty coverage.  
To reduce the risk of death, electric shock, serious injury, or fire, follow basic  
precautions including the following:  
• Only qualified service technicians should install and service this appliance.  
• This appliance must be installed in accordance with applicable national, state, and  
local codes and regulations.  
• This appliance requires an independent power supply of proper capacity. See  
the nameplate for electrical specifications. Failure to use an independent power  
supply of proper capacity can result in a tripped breaker, blown fuse, damage to  
existing wiring, or component failure. This could lead to heat generation or fire.  
THIS APPLIANCE MUST BE GROUNDED. This appliance is equipped with a  
NEMA 5-15 three-prong grounding plug  
to reduce the risk of potential shock  
hazards. It must be plugged into a properly grounded, independent 3-prong wall  
outlet. If the outlet is a 2-prong outlet, it is your personal responsibility to have a  
qualified electrician replace it with a properly grounded, independent 3-prong wall  
outlet. Do not remove the ground prong from the power cord and do not use an  
adapter plug.  
• Do not use an extension cord.  
To reduce the risk of electric shock, turn off the appliance before unplugging.  
To reduce the risk of electric shock, do not touch the plug with damp hands.  
• Do not use an appliance with a damaged power cord. The power cord should not  
be altered, jerked, bundled, weighed down, pinched, or tangled. Such actions  
could result in electric shock or fire. To unplug the appliance, be sure to pull the  
plug, not the cord, and do not jerk the cord.  
• Do not make any alterations to the appliance. Alterations could result in electric  
shock, injury, re, or damage to the appliance.  
5
Download from Www.Somanuals.com. All Manuals Search And Download.  
WARNING, continued  
• This appliance is not intended for use by persons (including children) with reduced  
physical, sensory, or mental capabilities, or lack of experience and knowledge,  
unless they have been given supervision or instruction concerning use of the  
appliance by a person responsible for their safety.  
• Children should be properly supervised around this appliance.  
• Do not climb, stand, or hang on the appliance or door or allow children or animals  
to do so. Do not climb into the appliance or allow children or animals to do so.  
Death or serious injury could occur or the appliance could be damaged.  
• Be careful not to pinch fingers when opening and closing the door. Be careful  
when opening and closing the door when children are in the area.  
• Do not use combustible spray or place volatile or flammable substances near the  
appliance. They might catch fire.  
• Keep the area around the appliance clean. Dirt, dust, or insects in the appliance  
could cause harm to individuals or damage to the appliance.  
NOTICE  
• Protect the floor when moving the appliance to prevent damage to the floor.  
• Keep ventilation openings, in the appliance enclosure or in the built-in structure,  
clear of obstruction. Do not place anything on top of the appliance. Blockage of  
airflow could negatively affect performance and damage the equipment.  
• Do not tightly pack the cabinet. Allow some space between items to ensure good  
air flow. Also allow space between items and interior surfaces.  
• Do not store items near the air outlet. They might freeze up and crack or break.  
To prevent deformation or cracks, do not spray insecticide onto the plastic parts or  
let them come into contact with oil.  
To avoid damage to the gasket, use only the door handle when opening and  
closing.  
6
Download from Www.Somanuals.com. All Manuals Search And Download.  
I. Specifications  
A. Electrical and Refrigerant Data  
See the nameplate for electrical and refrigerant data. The nameplate is located inside  
the cabinet.  
Electrical and Refrigerant Data  
Design Pressure (PSIG) Refrigerant (oz.)  
Model AC Supply Voltage Amperes  
HR24A 115/60/1  
HIGH  
LOW  
134a  
4
360  
120  
2.80  
We reserve the right to make changes in specifications and design without prior notice.  
B. Storage Capacity and Dimensions  
1. Storage Capacity  
Storage Capacity  
Interior Storage  
Total Shelf  
Model Capacity (ft3)  
Space (ft2)  
HR24A  
3.67  
2.26  
We reserve the right to make changes in specifications and design without prior notice.  
7
Download from Www.Somanuals.com. All Manuals Search And Download.  
2. Dimensions  
Unit: mm [in.]  
Top View  
Front View  
Side View  
Additional Dimensions (mm [in.])  
Model Interior Width Interior Height  
HR24A 460 [18.11] 475 [18.70]  
Interior Depth  
Door Stay Open Position  
450/330 [17.72/13.00]  
616 [24.25]  
We reserve the right to make changes in specifications and design without prior notice.  
8
Download from Www.Somanuals.com. All Manuals Search And Download.  
II. General Information  
A. Construction  
1. HR24A  
Display Module/Control Board  
Door Switch  
Door Lock  
Door  
• Evaporator Fan  
• Evaporator  
• Cabinet Thermistor  
Wire Shelves  
Door Gasket  
• Evaporator Fan Shroud  
Condenser  
Compressor  
Wire Harness  
Condensate  
Drain Line  
Condensate Drain  
Pan  
Drier  
Power Cord  
Capillary Tube  
Compressor  
Start Relay  
9
Download from Www.Somanuals.com. All Manuals Search And Download.  
B. Sequence of Operation  
1. Sequence Cycles and Shutdown  
The steps in the sequence are as outlined below. When power is supplied to CB,  
DM LEDs flash 3 times, then °F LED turns on. Press the power button for 2 sec., the  
cabinet temperature and EvapFM icon turn on and EvapFM starts. 2-min. Comp delay  
timer starts. Comp icon flashes during the 2-min. Comp delay. When the 2-min. Comp  
delay timer terminates, Comp icon turns steady and Comp starts.  
Note: • EvapFM de-energizes when door is opened.  
• There is a Comp delay of 2 min. at startup.  
• There is a minimum Comp run time of 3 min.  
• There is a Comp delay of 2 min. after a power interruption.  
"+" Up "P" Set Power  
Button Button Button  
Cabinet Temperature LEDs "-" Down  
Button  
°
°F  
Alarm Icon  
Compressor Icon  
°F LED  
Defrost Icon  
Evaporator Fan Motor Icon  
a) Refrigerator  
• The °F and CT LEDs remain on throughout the sequence of operation.  
• This appliance uses a time-initiated/time-terminated Comp off cycle defrost. The factory  
default defrost setting is once every 6 hours for 30 min.  
• 6-hr. defrost timer starts the very first time CB is energized (factory testing). Defrost time  
is cumulative power on time, therefore time may vary between starting the appliance  
and the first defrost. After the first defrost, defrost can be monitored for activation every  
6 hours.  
• Cabinet temperature is displayed during defrost.  
1. Startup  
EvapFM icon is on and Comp icon is flashing. EvapFM energizes. 2-min. Comp delay  
timer starts. Comp icon flashes until 2-min. Comp delay timer terminates.  
2. Cool Down  
EvapFM icon is on and Comp icon turns steady. EvapFM continues. 2-min. Comp  
delay timer terminates. Comp energizes and 3-min. Comp run timer starts.  
3. Cool Down Achieved  
EvapFM icon is on. CTh cools to setpoint (default 39°F). EvapFM continues. If Comp run  
time > 3-min., Comp icon turns off and Comp de-energizes. If Comp run time < 3-min.,  
Comp continues until 3-min. Comp run timer terminates, then Comp icon turns off and  
Comp de-energizes.  
10  
Download from Www.Somanuals.com. All Manuals Search And Download.  
4. Cool Down Restart  
EvapFM and Comp icons are on. CTh warms to 4°F above setpoint. Comp icon turns  
on and Comp energizes. 3-min. Comp run timer starts.  
5. Defrost Initiation  
EvapFM and Defrost icons are on.  
a) Automatic Defrost Initiation: EvapFM and Defrost icons are on. EvapFM continues.  
6-hr. DT terminates. 30-min. DT starts. If Comp run time < 3 min., Comp icon and  
Comp continue until 3-min. Comp run timer terminates. Once 3-min. Comp run timer  
terminates, Comp icon turns off, Comp de-energizes, and defrost starts.  
b) Manual Defrost Initiation: EvapFM and Defrost icons are on. To initiate a manual  
defrost, press and hold the "+" button until the defrost icon turns on. EvapFM  
continues. 30-min. DT starts. If Comp run time < 3 min., Comp icon and Comp  
continue until 3-min. Comp run timer terminates. Once 3-min. Comp run timer  
terminates, Comp icon turns off, Comp de-energizes, and 30-min. DT starts.  
Note: If the display module panel is locked, press and hold the "-" button and the power  
button until "UnL" appears briefly on the display module.  
6. Defrost Termination  
Comp icon is on. EvapFM icon flashing. 30-min. DT terminates. 6-hr. DT starts. Comp  
icon turns on and Comp energizes. 3-min. Comp run timer starts. 2-min. EvapFM timer  
starts, EvapFM icon starts flashing, and EvapFM de-energizes. When 2-min. EvapFM  
timer terminates, EvapFM icon turns steady and EvapFM energizes.  
7. Energy Saving Mode  
ESM initiates during periods of inactivity. Once CTh cools to setpoint, 20-min. ESM timer  
starts. DS must remain engaged without activation (door open) for 20 min. after CTh  
has achieved setpoint for ESM to initiate. Once 20-min. ESM timer terminates, EvapFM  
operates on ESM cycle. See "EvapFM ESM Cycle" below.  
Note: If DS is activated (door open) before 20-min. ESM timer terminates, ESM timer  
resets and 20-min. ESM timer re-starts once CTh cools to setpoint again.  
EvapFM ESM Cycle:  
• If Comp is de-energized when 20-min. ESM timer terminates, EvapFM de-energizes.  
• If Comp is energized when 20-min. ESM timer terminates, EvapFM continues and  
cycles off with Comp.  
• During ESM Comp off time, EvapFM operation is 1 min. on and 5 min. off. EvapFM  
operates on and off with Comp.  
Legend: CB–control board; Comp–compressor; CTh–cabinet thermistor; CT–cabinet  
temperature; DM–display module; DS–door switch; DT–defrost timer; ESM–energy  
saving mode; EvapFM–evaporator fan motor  
11  
Download from Www.Somanuals.com. All Manuals Search And Download.  
2. Sequence Flow Chart  
e v s e t a p b o o i n t  
C T h 4  
F °  
e v s e t a p b o o i n t  
F ° o 4 m s a r t  
C T h w  
12  
Download from Www.Somanuals.com. All Manuals Search And Download.  
C. Control Board and Display Module  
For factory default settings, see "II.H. Service Menu."  
For control board check procedure, see "IV.B. Control Board Check."  
NOTICE  
• The control board and display module are fragile; handle very carefully.  
• The control board and display module contain integrated circuits, which are  
susceptible to failure due to static discharge. It is especially important to touch  
the metal part of the appliance before handling or replacing the control board and  
display module .  
• Do not touch the electronic devices on the control board and display module or  
the back of the control board or display module.  
• Do not change wiring and connections. Do not misconnect terminals.  
• Do not short out power supply to test for voltage.  
• Always replace the whole control board and display module assembly if it goes  
bad.  
13  
Download from Www.Somanuals.com. All Manuals Search And Download.  
1. Control Board Layout  
Control Board  
Power Supply Input (115VAC)  
Compressor (115VAC)  
Ribbon Cable  
Control Board  
Cabinet Thermistor  
E1  
CONTROL BOARD  
Door Switch (5VDC)  
RIBBON CABLE  
Evaporator Fan Motor  
(12VDC)  
E2  
DISPLAY MODULE  
Display Module  
Display Module  
Fig. 1  
2. Display Module Layout  
"+" Up "P" Set Power  
Button Button Button  
Cabinet Temperature LEDs "-" Down  
Button  
Display  
°
°F  
Alarm Icon  
Compressor Icon  
Defrost Icon  
°F LED  
Evaporator Fan Motor Icon  
Fig. 2  
14  
Download from Www.Somanuals.com. All Manuals Search And Download.  
D. Cabinet Temperature  
1. Default Settings  
The default CT setpoint is 39°F. The default CT display scale setting is °F. NOTICE! Do  
not change the CT display scale from °F to °C. All temperature related values in the  
service menu must be changed manually if the CT display scale is changed from  
°F to °C.  
a) Adjusting the Temperature Setpoint  
The CT setpoint is adjustable between 34°F and 52°F. Follow the directions below to  
adjust the CT setpoint.  
Note: If the display module panel is locked, press and hold the "-" button and the power  
button until "UnL" appears briefly on the display module.  
1) Press and hold the "P" button until Comp icon flashes on DM.  
2) Press the "-" or "+" button until the desired value is displayed.  
3) Press the "P" button to save the new CT setpoint and return to the CT display. If  
no button is pressed for 15 sec. after selecting the new CT setpoint, DM returns to  
CT display and the new CT setpoint is saved.  
b) Manual Defrost  
To initiate a manual defrost, press and hold the "+" button until the defrost icon turns on.  
30-min. DT starts. If Comp run time < 3 min., Comp icon and Comp continue until 3-min.  
Comp run timer terminates. Once 3-min. Comp run timer terminates, Comp icon turns  
off, Comp de-energizes, and 30-min. DT starts. During defrost, the defrost icon stays on,  
EvapFM runs normally, and CT is displayed. Defrost lasts for 30 min.  
Legend: Comp–compressor; CT–cabinet temperature; DM–display module; DT–defrost  
timer; EvapFM–evaporator fan motor  
15  
Download from Www.Somanuals.com. All Manuals Search And Download.  
E. Display Module Icons  
Display module icons inform you of energized components and if the appliance is in  
alarm.  
Display Module Icons  
Icon  
Meaning  
Compressor  
Steady: Compressor running.  
Flashing: Compressor delay timer. Compressor starts within 2 min.  
While adjusting cabinet temperature setpoint. For cabinet temperature setpoint  
adjustment, see "II.D Cabinet Temperature."  
Defrost  
Appliance is in defrost cycle. See "II.B.a)5. Defrost" for details.  
Evaporator Fan Motor  
Evaporator fan motor is running. Evaporator fan motor de-energizes when door is open.  
During energy saving mode, evaporator fan motor cycles with compressor. When compressor is  
de-energized, evaporator fan motor cycles 1 min. on and 5 min. off.  
Alarm  
Appliance is in alarm. See "II.G. Alarm Safeties" for details.  
F. Control Panel Lockout  
The control panel can be locked to help prevent the appliance from being turned off or  
the setpoint from being changed inadvertently.  
To lock the control panel, press and hold the "-" button and the power button until "Loc"  
appears briefly on the display module.  
To unlock the control panel, press and hold the "-" button and the power button until  
"UnL" appears briefly on the display module.  
16  
Download from Www.Somanuals.com. All Manuals Search And Download.  
G. Alarm Safeties  
The alarms are designed to protect the appliance and the items inside. These alarms  
give information and warnings in the event the appliance is operating out of acceptable  
parameters. For all alarms except Pr1, the alarm icon  
alternates with the cabinet temperature. If the Pr1 alarm occurs, only Pr1 and the alarm  
icon are displayed.  
turns on and the alarm code  
Alarm Signals  
Corrective Action/Reset Details  
Alarm Code Problem  
High Temperature Alarm  
If obvious corrections such as closing the door and  
cleaning the condenser do not bring temperature  
back in range, see "IV. Service Diagnosis."  
Cabinet temperature has exceeded the  
setpoint temperature by 10°F for more  
than 2 hours.  
AH  
Automatically resets when temperature returns to  
normal. Alarm icon flashes until reset manually.  
Low Temperature Alarm  
If obvious corrections do not bring the temperature  
back in range, see "IV. Service Diagnosis."  
AL  
Cabinet temperature has remained below  
the setpoint temperature by 10°F for more Automatically resets when temperature returns to  
than 2 hours.  
normal. Alarm icon flashes until reset manually.  
Door Open  
Close the door.  
Ld  
Cabinet Thermistor Malfunction Alarm  
Compressor and evaporator fan motor cycle 10 min.  
on, 10 min. off.  
Pr1  
Cabinet thermistor has failed.  
a) High and Low Temperature Alarm Values (AH or AL)  
If an AH or AL alarm occurs, follow the steps below to acquire alarm details.  
1) Press the "-" button for 3 sec. to enter the alarm menu. "EnS" is displayed.  
2) Press the "+" button once. "LS" is displayed.  
3) Press the "P" button. The alarm code is displayed.  
4) Press the "P" button again and the alarm details are displayed in 2 second increments.  
AH or AL Alarm code  
XX°F The highest or lowest temperature during the alarm  
dur Alarm duration  
h01 Hours alarm has been engaged  
n15 Minutes alarm has been engaged (continuance of h01)  
To review, press the "P" button again.  
To exit, press the on/off button twice. After pressing the on/off button the first time, "LS"  
is displayed. After pressing the on/off button the second time, the display returns to the  
alarm code display.  
17  
Download from Www.Somanuals.com. All Manuals Search And Download.  
b) Clearing High and Low Temperature Alarms  
To clear an alarm, follow the steps below.  
1) Press the "-" button for 3 sec. to enter the alarm menu. "EnS" is displayed.  
2) Press the "-" or "+" button twice. After pressing the "-" or "+" button the first time, "LS" is  
displayed. After pressing the "-" or "+" button the second time, "rLS" is displayed.  
3) Once "rLS" is displayed, press the "P" button.  
4) Using the "-" or "+" button, set the display to "149."  
5) Press the "P" button. The display flashes "----" for 4 sec. The alarm and display module  
are now deleted and clear. The control board returns to normal operation.  
Note: If the cabinet temperature is out of acceptable range, the procedures above  
only change the alarm icon  
from flashing to steady for 15 minutes. Once the  
temperature is in acceptable range, the alarm clears from the display module and  
deleted from memory.  
H. Service Menu  
The service menu chart is provided to give information on the operation parameters of  
this appliance. NOTICE! Do not adjust. Adjustments outside of the factory default  
settings could adversely affect safety, performance, component life, and warranty  
coverage.  
Note: If the display module panel is locked, press and hold the "-" button and the power  
button until "UnL" appears briefly on the display module.  
a) Service Menu Access  
(1) Enter Service Menu  
1. Make sure the appliance is plugged into the electrical outlet and power is on.  
2. Press and hold the "-" and "+" buttons until "PA" is displayed.  
3. Press the "P" button. "0" is displayed. Using the "-" button, set the display to "-19." This is  
the service menu password.  
(2) Service Menu List  
4. Press the "P" button, "PA" is displayed. Press and hold the "-" and "+" buttons until "SP"  
is displayed. "SP" is the first level of the service menu. "SP" is working setpoint.  
5. To view the setting value, press the "P" button. To adjust the setting value, press the  
"-" or "+" button. To return to the service menu list, press the "P" button. This saves the  
new value and returns you to the service menu list.  
6. Press the "-" or "+" button to scroll through the service menu list. Press the "P" button  
to view the selected setting value. Press the "P" button again to save the changes and  
return to the service menu list.  
(3) Exit Service Menu  
7. Press the "-" and "+" buttons for 4 sec. to exit the service menu or do not operate the  
display for 60 sec. Display automatically switches back to normal operating mode and  
saves changes after 60 sec. of inactivity.  
18  
Download from Www.Somanuals.com. All Manuals Search And Download.  
b) Service Menu Chart  
Setpoint  
Service Menu Min.  
Max.  
Unit  
Factory Setting Description  
SP  
See r1 See r2 °C/°F 39°F  
Cabinet setpoint.  
(compressor off temperature).  
(see r0 for compressor on temperature).  
Thermistor Input (Do Not Adjust)  
Service Menu Min.  
Max.  
25  
Unit  
Factory Setting Description  
CA1  
CA2  
-25  
-25  
°C/°F  
°C/°F  
0
0
Cabinet thermistor temperature offset.  
25  
Evaporator thermistor temperature  
offset.  
P1  
0
1
---  
0
Decimal point for °C display: 0=no,  
1=yes.  
P2  
P3  
0
0
1
2
---  
---  
1
0
Temperature display scale: 0=°C, 1=°F  
Evaporator thermistor:  
0=not connected  
1=defrost/evaporator fan  
2=defrost  
P8  
0
250  
ds  
5
Temperature display delay.  
Operation (Do Not Adjust)  
Service Menu Min.  
Max.  
Unit  
Factory Setting Description  
r0  
0
15  
°C/°F  
4°F  
Temperature differential above  
setpoint for the compressor to  
turn on.  
r1  
r2  
r3  
r4  
r5  
r6  
-99  
r1  
0
r2  
99  
1
°C/°F  
°C/°F  
---  
34°F  
52°F  
0
Minimum cabinet setpoint.  
Maximum cabinet setpoint.  
Locked setpoint. 0=no, 1=yes  
0
99  
99  
240  
°C/°F  
°C/°F  
min.  
0
Energy saving and overcooling  
Do not adjust.  
0
0
0
30  
Compressor Protection (Do Not Adjust)  
Service Menu Min.  
Max.  
Unit  
Factory Setting Description  
C0  
0
240  
min.  
2
Compressor delay at startup  
and after power interruption.  
C1  
0
240  
min.  
5
Minimum time between  
compressor starts.  
C2  
C3  
C4  
0
0
0
240  
240  
240  
min.  
sec.  
min.  
3
Minimum compressor off time.  
Minimum compressor run time.  
180  
10  
Compressor off time with  
defective cabinet thermistor.  
C5  
0
240  
min.  
10  
Compressor on time with  
defective cabinet thermistor.  
19  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Defrost (Do Not Adjust)  
Unit Factory Setting Description  
Service Menu Min.  
Max.  
d0  
0
99  
hrs.  
6
Defrost interval:  
0=no defrost  
d1  
0
2
---  
2
Defrost type. Do not adjust.  
0=electric heater  
1=hot gas  
2=off cycle (evaporator fan motor)  
d2  
d3  
d4  
-99  
0
99  
99  
1
°C/°F  
min.  
---  
N/A  
30  
0
Limit for defrost if P3 = 1 or 2.  
Defrost duration.  
0
Defrost on startup. Do not adjust.  
0=no, 1=yes  
d5  
d6  
0
0
99  
1
min.  
---  
0
0
Minimum time between startup and  
defrost. Do not adjust.  
Temperature display  
during defrost. Do not adjust.  
0=cabinet temperature  
1=cabinet temperature or setpoint  
+ differential (4°F). Based on  
cabinet temperature at defrost  
initiation.  
d7  
d8  
0
0
15  
3
min.  
---  
0
0
Drip time. Do not adjust.  
Defrost initiation. Do not adjust.  
0=d0 defrost timer is cumulative  
power on time.  
1=d0 defrost timer is cumulative  
compressor run time.  
2=defrost starts when  
evaporator temperature < d9  
for time d0.  
3=based on evaporator temperature  
when evaporator thermistor is  
present.  
d9  
-99  
0
99  
99  
°C/°F  
°C/°F  
---  
32  
27  
0
Do not adjust.  
Do not adjust.  
Do not adjust.  
Do not adjust.  
Do not adjust.  
Do not adjust.  
d10  
d11  
d12  
d13  
d14  
d15  
0
1
0
99  
min.  
min.  
min.  
min.  
30  
1
1
240  
240  
99  
0
30  
0
0
Minimum compressor run time before  
defrost if d1=1. Do not adjust.  
20  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Temperature Alarm (Do Not Adjust)  
Service Menu Min.  
Max.  
Unit  
Factory Setting Description  
A0  
0
1
---  
0
AL alarm sensor. Do not adjust.  
0=cabinet thermistor  
1=evaporator thermistor  
A1  
A2  
-99  
0
99  
2
°C/°F  
---  
-10  
1
Degrees below setpoint for AL alarm  
when A2=1. Do not adjust.  
AL alarm. Do not adjust.  
0=deactivated  
1=A1 relative to setpoint  
(setpoint - A1)  
2=absolute. AL occurs at  
temperature A1.  
A4  
A5  
-99  
0
99  
2
°C/°F  
---  
10  
1
Degrees above setpoint for AH  
alarm when A5=1. Do not adjust.  
AH alarm. Do not adjust.  
0=deactivated  
1=A4 relative to setpoint  
(setpoint + A4)  
2=absolute. AH occurs at  
temperature A4.  
A6  
A7  
0
0
240  
240  
min.  
min.  
120  
120  
AH delay after startup.  
Do not adjust.  
Delay for AL or AH alarm to occur  
after temperature is below A1 or  
above A4.  
Do not adjust.  
A8  
A9  
0
0
240  
240  
15  
min.  
min.  
15  
15  
4
AH delay after door switch closes.  
Do not adjust.  
AH delay after door switch opens. Do  
not adjust.  
A11  
0.1  
°C/°F  
A1 and A4 temperature differential.  
Do not adjust.  
21  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Evaporator Fan Motor (Do Not Adjust)  
Service Menu Min.  
Max.  
Unit  
Factory Setting Description  
F0  
0
4
---  
1
Fan operation with door closed.  
Do not adjust.  
0=off  
1=on: see also F13, F14, and L10  
2=parallel with compressor  
3= dependent on F1  
4=disabled when compressor is off,  
dependent on F1 when  
compressor is on.  
F1  
F2  
-99  
0
99  
2
°C/°F  
---  
30  
1
Fan off temperature when F0 set to  
3 or 4. Do not adjust.  
Fan operation during defrost:  
Do not adjust.  
0=disabled  
1=enabled  
2=dependent on F0  
F3  
F7  
0
15  
99  
2
0
Maximum fan off time when defrost  
thermistor used.  
-99  
°C/°F  
Fan on temperature when defrost  
thermistor used.  
F8  
F9  
0.1  
0
15  
°C/°F  
sec.  
4
0
F1 differential.  
240  
Energy saving evaporator fan motor  
delay after compressor shuts off.  
F13  
F14  
0
0
240  
240  
min.  
min.  
5
1
Energy saving evaporator fan motor  
off time.  
Energy saving evaporator fan motor  
on time.  
Door Switch and Door Alarm (Do Not Adjust)  
Service Menu Min.  
Max.  
Unit  
Factory Setting Description  
L0  
0
5
---  
2
Door switch function.  
1=compressor and evaporator  
fan motor de-energized  
2=evaporator fan motor  
de-energized  
3-5=reserved  
L1  
0
1
---  
0
Door switch operation.  
0=normally open  
1=normally closed  
L2  
L3  
-1  
-1  
120  
120  
min.  
min.  
10  
-1  
Door alarm time delay.  
-1=deactivated  
Evaporator fan motor off time  
when door is open.  
-1=until door switch engaged  
L4  
0
0
1
---  
0
Save door alarm.  
0=no  
1=yes  
L10  
999  
min.  
20  
Energy saving activation.  
After cabinet temperature  
is reached and door switch  
remains closed.  
22  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Serial Network (Do Not Adjust)  
Service Menu Min.  
Max.  
247  
3
Unit  
---  
Factory Setting Description  
LA  
Lb  
LP  
1
0
0
247  
2
Address (not used)  
---  
Baud Rate (not used)  
Parity (not used)  
2
---  
2
23  
Download from Www.Somanuals.com. All Manuals Search And Download.  
III.Technical Data  
A. Refrigeration Circuit  
Left Side  
Perimeter  
Liquid Line  
Condenser  
Drier  
Condensate Pan  
Evaporator  
Capillary Tube  
Evaporator  
Fan Motor  
Compressor  
24  
Download from Www.Somanuals.com. All Manuals Search And Download.  
B. Wiring Diagram  
1. HR24A  
25  
Download from Www.Somanuals.com. All Manuals Search And Download.  
IV. Service Diagnosis  
WARNING  
• This appliance should be diagnosed and repaired only by qualified service  
personnel to reduce the risk of death, electric shock, serious injury, or fire.  
• Risk of electric shock. Use extreme caution and exercise safe electrical practices.  
• Moving parts (e.g. fan blade) can crush and cut. Keep hands clear.  
• Make sure all food zones are clean after the appliance is serviced. For cleaning  
procedures, see "VI. A. Cleaning."  
A. Diagnostic Procedure  
The diagnostic procedure is basically a sequence check that allows you to diagnose the  
electrical system and components. Before proceeding, check for correct installation and  
proper voltage per appliance nameplate. When checking AC voltage (115VAC), always  
choose a neutral (W wire) to establish a good neutral connection. If the control board is  
in alarm, see "II.F Alarm Safeties." For further details, see "IV.B. Control Board Check."  
• If the control panel is locked, press and hold the "-" button and the power button until  
"UnL" appears briefly on the display module.  
• The °F and cabinet temperature LEDs remain on throughout the sequence of operation.  
• This appliance uses a time-initiated/time-terminated Comp off cycle defrost. The factory  
default defrost setting is once every 6 hours for 30 min.  
• 6-hr. defrost timer starts the very first time CB is energized (during factory testing).  
Defrost time is cumulative power on time, therefore time may vary between starting  
the appliance and the first defrost. After the first defrost, defrost can be monitored for  
activation every 6 hours.  
• Cabinet temperature is displayed during defrost.  
1) Press and hold the power button for 2 sec. to turn off the appliance.  
2) Unplug the appliance from the electrical outlet.  
3) Remove the top panel. Secure the top panel to prevent it from falling over when  
checking voltages and CB items.  
4) Secure (tape) DS in the door closed position.  
5) Plug the appliance back into the electrical outlet. °F LED turns on. Diagnosis: Confirm  
that °F LED is on. If not, check CB POWER connector for 115VAC. If 115VAC is not  
present, check power supply and power cord connection. If 115VAC is present and  
°F LED is not on, replace CB.  
6) Press the power button for 2 sec. to turn on the appliance.  
26  
Download from Www.Somanuals.com. All Manuals Search And Download.  
7) Startup–EvapFM icon is on and Comp icon is flashing. EvapFM energizes.  
2-min. Comp delay timer starts. Comp icon flashes until 2-min. Comp delay timer  
terminates. Diagnosis: Check that CT LEDs and EvapFM icon turn on. Next, check  
that EvapFM energizes. If not, confirm that DS is engaged. Check across DS for 5VDC.  
If 5VDC is not present, check DS activation lever and DS continuity. Note: DS contacts  
are open when DS is engaged. If 5VDC is present, check CB EvapFM connector for  
12VDC. If 12VDC is not present, replace CB. If 12VDC is present, check EvapFM wiring  
connector for loose connection, EvapFM continuity, and fan blade for binding.  
8) Cool Down–EvapFM icon is on and Comp icon turns steady. EvapFM continues.  
2-min. Comp delay timer terminates. Comp energizes and 3-min. Comp run timer  
starts. Diagnosis: Confirm CTh is at least 4°F above setpoint. Next, check that Comp  
energizes. If not, check CB Comp connector for 115VAC. If 115VAC is not present,  
confirm CTh status. See "IV.C. Thermistor Check." If CTh is in range and 115VAC is not  
present, replace CB. If 115VAC is present, and Comp is off, check Comp wire harness  
connections. Next check Comp external protector (integrated with start relay), Comp  
start components, and Comp motor winding continuity. If Comp energizes and the  
cabinet does not cool down, check for air leaks around the door (gasket), a restriction in  
the refrigeration circuit, or refrigerant leak.  
9) Cool Down AchievedEvapFM icon is on. CTh cools to setpoint (default 39°F).  
EvapFM continues. If Comp run time > 3-min., Comp icon turns off and Comp  
de-energizes. If Comp run time < 3-min., Comp continues until 3-min. Comp run timer  
terminates, then Comp icon turns off and Comp de-energizes. Diagnosis: If CTh is  
in range and Comp does not de-energize, confirm Comp run time > 3 min. If Comp  
continues after 3-min. Comp run timer terminates, replace CB.  
10) Cool Down RestartEvapFM icon is on. CTh warms to 4°F above setpoint (default  
39°F). Comp icon turns on and Comp energizes. 3-min. Comp run timer starts.  
Diagnosis: See step 8 above.  
11) Defrost–EvapFM and Defrost icons are on. Cabinet Temperature is Displayed.  
a) Automatic Defrost Initiation: 6-hr. DT terminates. 30-min. DT starts. EvapFM  
continues. If Comp run time < 3 min., Comp icon and Comp continue until 3-min.  
Comp run timer terminates. Once 3-min. Comp run timer terminates, Comp  
icon turns off, Comp de-energizes, and defrost starts. Diagnosis: Has 6-hr. DT  
terminated? If defrost icon is on, confirm that Comp de-energizes. If not, confirm  
Comp run time > 3 min. If Comp continues after 3-min. Comp run timer terminates,  
replace CB.  
b) Manual Defrost Initiation: To initiate a manual defrost, press and hold the "+" button  
until the defrost icon turns. 30-min. DT starts. EvapFM continues. If Comp run time  
< 3 min., Comp icon and Comp continue until 3-min. Comp run timer terminates.  
Once 3-min. Comp run timer terminates, Comp icon turns off, Comp de-energizes,  
and defrost starts. Diagnosis: If defrost icon is on, confirm that Comp de-energizes.  
If not, confirm Comp run time > 3 min. If Comp continues after 3-min. Comp run timer  
terminates, replace CB.  
27  
Download from Www.Somanuals.com. All Manuals Search And Download.  
c) Defrost Termination: Comp icon is on. EvapFM icon flashing. 30-min. DT  
terminates. 6-hr. DT starts. Comp icon turns on and Comp energizes. 2-min. EvapFM  
timer starts. EvapFM icon starts flashing and EvapFM de-energizes. When 2-min.  
EvapFM timer terminates, EvapFM icon turns steady and EvapFM energizes. Normal  
operation resumes. Diagnosis: Has appliance been in defrost for 30 min.? If not,  
allow 30-min. DT to terminate. Confirm CTh is 4°F above setpoint. After 30-min.  
DT terminates, does Comp icon turn on and Comp energize? If not, replace CB. If  
30-min. DT terminates and Comp icon turns on but Comp does not energize, check  
CB Comp connector for 115VAC. If 115VAC is not present, replace CB. If 115VAC is  
present, and Comp is off, check Comp wire harness connections, Comp external  
protector (integrated with start relay), Comp start components, and Comp motor  
winding continuity.  
12) Energy Saving Mode  
ESM initiates during periods of inactivity. Once CTh cools to setpoint, 20-min. ESM  
timer starts. DS must remain engaged without activation (door open) for 20 min. after  
CTh has achieved setpoint for ESM to initiate. Once 20-min. ESM timer terminates,  
EvapFM operates on ESM cycle.  
Diagnosis: Confirm 20-min. ESM timer terminates. Check that EvapFM cycles off with  
Comp and operates 1 min. on and 5 min. off when Comp is de-energized. If not, replace  
CB.  
Legend: CB–control board; Comp–compressor; CT–cabinet temperature; DM–display  
module; DS–door switch; DT–defrost timer; ESM–energy saving mode;  
EvapFM–evaporator fan motor  
28  
Download from Www.Somanuals.com. All Manuals Search And Download.  
B. Control Board Check  
Before replacing a CB that does not show a visible defect and that you suspect is bad,  
always conduct the following check procedure. This procedure will help you verify your  
diagnosis. Always choose a neutral (W wire) to establish a good neutral connection  
when checking AC voltage (115VAC).  
Startup and Cool Down:  
1) Press the power button for 2 sec. to turn off the appliance.  
2) Unplug the appliance from the electrical outlet.  
3) Remove the top panel. Check all wiring connections. Confirm that the power cord,  
EvapFM, Comp, DS, and CTh are all properly connected to CB and ground connection  
(GND) is properly connected to the frame.  
4) Secure the top panel to prevent it from falling over when checking voltages and  
CB items.  
5) Secure (tape) DS in the door closed position.  
6) Plug the appliance back in. °F LED turns on. Diagnosis: Confirm that °F LED is on. If  
not, check CB POWER connector for 115VAC. If 115VAC is not present, check power  
supply and power cord connection. If 115VAC is present and °F LED is not on, replace  
CB.  
7) Press the power button for 2 sec. to turn on the appliance.  
8) Check that CT LEDs and EvapFM icon turn on. If not, check for 115VAC at the POWER  
connector on CB. If 115VAC is not present, check power cord and power supply.  
If 115VAC is present, and DM is not on (°F and CT LEDs and EvapFM icon), replace  
CB.  
9) If °F and CT LEDs are on but EvapFM icon is not, confirm DS is engaged (pushed in,  
contacts open). Check across DS for 5VDC. If 5VDC is not present, check DS activation  
lever and DS continuity. Note: DS contacts are open when DS is engaged (door closed).  
If 5VDC is present, check CB EvapFM connector for 12VDC. If 12VDC is not present,  
replace CB. If 12VDC is present, check EvapFM wiring connector for loose connection,  
EvapFM continuity, and fan blade for binding.  
10) Defrost:  
This appliance defrosts every 6 hrs. for 30 min. Defrost is an off-cycle defrost.  
a) Manual Defrost Initiation: To initiate a manual defrost, press and hold the "+" button  
until the defrost icon turns on. 30-min. DT starts. EvapFM continues. If Comp run  
time < 3 min., Comp icon and Comp continue until 3-min. Comp run timer terminates.  
Once 3-min. Comp run timer terminates, Comp icon turns off, Comp de-energizes,  
and 30-min. DT starts. Diagnosis: If defrost icon is on, confirm that Comp  
de-energizes. If not, confirm Comp run time > 3 min. If Comp continues after 3-min.  
Comp run timer terminates, replace CB.  
29  
Download from Www.Somanuals.com. All Manuals Search And Download.  
b) Defrost Termination: Comp icon is on. EvapFM icon flashing. 30-min. DT terminates.  
6-hr. DT starts. Comp icon turns on and Comp energizes. 2-min. EvapFM timer  
starts. EvapFM icon starts flashing and EvapFM de-energizes. When 2-min. EvapFM  
timer terminates, EvapFM icon turns steady and EvapFM energizes. Normal  
operation resumes. Diagnosis: Has appliance been in defrost for 30 min.? If not,  
allow 30-min. DT to terminate. Confirm CTh is 4°F above setpoint. After 30-min. DT  
terminates, does Comp icon turns on and Comp energize? If not, replace CB.  
Legend: CB–control board; Comp–compressor; CT–cabinet temperature; DM–display  
module; DS–door switch; DT–defrost timer; EvapFM–evaporator fan motor  
C.Thermistor Check  
The cabinet thermistor is used for cabinet temperature control. Thermistor resistance  
varies depending on temperature. The control board monitors the resistance to control  
system operation. No adjustment is required. In the event the cabinet thermistor reading  
is out of range (Pr1 alarm), the compressor operates on a fixed time basis of 10-min. on  
and 10-min. off.  
To check thermistor resistance, follow the steps below.  
1) Press the power button for 2 sec. to turn the appliance off, then unplug the appliance.  
2) Remove the evaporator shroud.  
3) Disconnect and remove the evaporator thermistor.  
4) Immerse the thermistor sensor portion in a glass containing ice and water for 2 to 3 min.  
5) Check the resistance between the wires at the thermistor connector. Normal reading is  
within 14.0 to 19.0 kΩ. If outside the normal reading, replace the thermistor.  
6) Reconnect and replace the thermistor in its correct position.  
7) Replace the evaporator shroud in its correct position.  
8) Plug the appliance back in. Press the power button for 2 sec. to turn the appliance on.  
30  
Download from Www.Somanuals.com. All Manuals Search And Download.  
D. Diagnostic Chart  
Before consulting the diagnostic charts, check the following:  
• Check the cabinet temperature setpoint and factory default settings. For factory default  
settings, see "II.D. Cabinet Temperature" and "II.H. Service Menu."  
• Make sure the doors are not left open or opened too often and that they are sealing  
properly.  
• Make sure product is not blocking airflow and that the cabinet is not overloaded with  
warm or hot product. Product should be allowed to cool before putting in the appliance.  
• Check for correct installation and proper voltage per appliance nameplate. This  
appliance is approved for indoor or outdoor use. Normal operating ambient temperature  
should be within 61°F to 95°F (16°C to 35°C).  
• The appliance should not be located next to ovens, grills, or other high heat producing  
equipment or exposed to direct sunlight.  
• The appliance must have a minimum of 1" (3 cm) clearance at bottom and top. Air must  
be able to circulate freely under, behind, and above the appliance.  
• Check the control board using the steps in "IV.B. Control Board Check."  
1. Appliance Not Cooling  
Appliance Not Cooling - Possible Cause  
Power Supply  
Unplugged, off, blown fuse, or tripped or defective breaker.  
1.  
a)  
b)  
c)  
a)  
b)  
a)  
b)  
a)  
b)  
a)  
Loose connection.  
Not within specifications.  
Loose connection.  
Defective.  
Cord and Plug  
2.  
3.  
4.  
5.  
Wiring  
Loose connection or open.  
Faulty.  
Power Button (control board)  
Turned "OFF."  
Defective.  
Control Board and Display Module  
See "II.G. Alarm Safeties."  
and "IV.B. Control Board Check."  
In alarm.  
Defective.  
b)  
Door Switch  
Door open.  
6.  
7.  
a)  
b)  
a)  
b)  
a)  
b)  
c)  
d)  
a)  
a)  
a)  
b)  
Defective.  
Evaporator Fan Motor  
Compressor  
Fan blade binding.  
Defective.  
Compressor external protector open or defective.  
Motor winding open.  
PTC relay contacts bad or coil winding open.  
Inefficient.  
8.  
Condenser  
Dirty.  
9.  
10.  
11.  
Evaporator  
Dirty or frozen up.  
Refrigerant/Refrigerant Lines  
Gas leak, low charge.  
Refrigerant lines restricted.  
31  
Download from Www.Somanuals.com. All Manuals Search And Download.  
2. Evaporator is Frozen Up  
Evaporator is Frozen Up - Possible Cause  
Evaporator  
Dirty.  
1.  
2.  
3.  
4.  
a)  
a)  
a)  
a)  
b)  
Evaporator Fan Motor  
Control Board  
Defective.  
Defective, not operating evaporator fan motor.  
Gas leak, low charge.  
Refrigerant lines restricted.  
Refrigerant/Refrigerant Lines  
3. Defrost Fails to Start or Terminate  
Defrost Fails to Start or Terminate - Possible Cause  
Control Board  
Defective.  
a)  
1.  
32  
Download from Www.Somanuals.com. All Manuals Search And Download.  
V. Replacement of Components  
WARNING  
• This appliance should be diagnosed and repaired only by qualified service  
personnel to reduce the risk of death, electric shock, serious injury, or fire.  
• Press the power button for 2 sec. to turn off the appliance, then unplug the power  
cord from the electrical outlet before servicing.  
• Make sure all food zones in the appliance are clean after the appliance is  
serviced. For cleaning procedures, see "VI.A. Cleaning."  
A. Service for Refrigerant Lines  
WARNING  
• Repairs requiring the refrigeration circuit to be opened must be performed by  
properly trained and EPA-certified service personnel.  
• Use an electronic leak detector or soap bubbles to check for leaks. Add a trace  
of refrigerant to the system (if using an electronic leak detector), and then raise  
the pressure using nitrogen gas (140 PSIG). Do not use R-134a as a mixture with  
pressurized air for leak testing.  
NOTICE  
• Always recover the refrigerant and store it in an approved container. Do not  
discharge the refrigerant into the atmosphere.  
• Do not leave the system open for longer than 15 min. when replacing or servicing  
parts. The Polyol Ester (POE) oils used in R-134a appliances can absorb  
moisture quickly. Therefore it is important to prevent moisture from entering the  
system when replacing or servicing parts.  
• Always install a new drier every time the sealed refrigeration system is opened.  
Do not replace the drier until after all other repair or replacement has been made.  
Install the new drier with the arrow on the drier in the direction of the refrigerant  
flow.  
• When brazing, protect the drier by using a wet cloth to prevent the drier from  
overheating. Do not allow the drier to exceed 250°F (121°C).  
1. Refrigerant Recovery  
No refrigerant access valves are provided on this appliance. Using proper refrigerant  
practices, utilize a temporary tap-line valve on the high side to recover the refrigerant.  
Store the refrigerant in an approved container. Do not discharge the refrigerant into the  
atmosphere.  
After recovery is complete, replace the tap-line valve with a proper, permanent access  
valve.  
33  
Download from Www.Somanuals.com. All Manuals Search And Download.  
2. Brazing  
WARNING  
• R-134a itself is not flammable at atmospheric pressure and temperatures up to  
212°F (100°C).  
• R-134a itself is not explosive or poisonous. However, when exposed to high  
temperatures (open flames), R-134a can be decomposed to form hydrofluoric  
acid and carbonyl fluoride both of which are hazardous.  
• Do not use silver alloy or copper alloy containing arsenic.  
• Use an electronic leak detector or soap bubbles to check for leaks. Add a trace  
of refrigerant to the system (if using an electronic leak detector), and then raise  
the pressure using nitrogen gas (140 PSIG). Do not use R-134a as a mixture with  
pressurized air for leak testing.  
1) Braze all fittings while purging with nitrogen gas flowing at a pressure of 3 to 4 PSIG.  
NOTICE  
• Always install a new drier every time the sealed refrigeration system is opened.  
Do not replace the drier until after all other repair or replacement has been made.  
Install the new drier with the arrow on the drier in the direction of the refrigerant  
flow.  
• When brazing, protect the drier by using a wet cloth to prevent the drier from  
overheating. Do not allow the drier to exceed 250°F (121°C).  
2) Use an electronic leak detector or soap bubbles to check for leaks. Add a trace  
of refrigerant to the system (if using an electronic leak detector), and then raise  
the pressure using nitrogen gas (140 PSIG). Do not use R-134a as a mixture with  
pressurized air for leak testing.  
3. Evacuation and Recharge (R-134a)  
1) Attach a vacuum pump to the system. Be sure the high-side charging hose is connected  
to the field-installed high-side access valve.  
IMPORTANT  
The vacuum level and vacuum pump may be the same as those for current  
refrigerants. However, the rubber hose and gauge manifold to be used for  
evacuation and refrigerant charge should be exclusively for POE oils.  
2) Turn on the vacuum pump, then open the high-side valve on the gauge manifold. Never  
allow the oil in the vacuum pump to flow backwards.  
3) Allow the vacuum pump to pull down to a 29.9" Hg vacuum. Evacuating period depends  
on pump capacity.  
4) Close the high-side valve on the gauge manifold.  
34  
Download from Www.Somanuals.com. All Manuals Search And Download.  
5) Disconnect the gauge manifold hose from the vacuum pump and attach it to a  
refrigerant service cylinder. Remember to loosen the connection and purge the air from  
the hose. See the nameplate for the required refrigerant charge. Hoshizaki recommends  
only virgin refrigerant or reclaimed refrigerant which meets the requirements of ARI  
Standard 700 (latest edition) be used.  
6) A liquid charge is recommended when charging an R-134a system. Place the service  
cylinder on the scales; if the service cylinder is not equipped with a dip tube, invert the  
service cylinder, then place it on the scales. Open the high-side valve on the gauge  
manifold.  
7) Allow the system to charge with liquid until the proper charge weight is met.  
8) Close the high-side valve on the gauge manifold, then close the refrigerant access valve  
(if applicable). Disconnect the gauge manifold hose.  
9) Cap the access valve to prevent a possible leak.  
B. Important Notes for Component Replacement  
NOTICE  
When replacing a component listed below, see the notes to help ensure proper  
operation.  
Component  
Notes  
Compressor  
Install a new PTC relay. WARNING! To reduce the risk of electric shock, be sure to  
reconnect the component's ground wire.  
35  
Download from Www.Somanuals.com. All Manuals Search And Download.  
C. Door Reversal  
If you would like to reverse the door swing, follow the steps below.  
1) Make sure the appliance is off and unplugged.  
2) Remove the fasteners securing the top panel. See Fig. 1. Being careful not to pull on the  
wires to the control panel and door switch, lift off the top panel. Secure the top panel so  
that it does not interfere with the upper hinge or top panel bracket and will not fall.  
3) While maintaining a hold on the door, remove the fasteners securing the upper hinge to  
the right side of the appliance. Lift off the door and upper hinge.  
4) Remove the top panel bracket from the left side of the appliance, then secure it to the  
right side of the appliance.  
5) Remove the 2 outside plastic plugs from the lower left side of the appliance.  
6) Remove the lower hinge from the right side of the appliance, then secure it to the left  
side of the appliance.  
7) Place the 2 plastic plugs in the holes on the lower-right side of the appliance.  
8) Remove the plastic plugs and the handle from the door.  
9) Secure the handle to the right side of the door. Place the plugs in the open handle holes  
on the left side of the door and in the hinge hole on the right side of the door.  
10) Place the door onto the lower hinge, then place the upper hinge in the door and secure  
to the left side of the appliance.  
11) Make sure the door is level. If not, adjust the door using the slots in the hinges.  
12) Check that the wiring is connected and routed properly, then replace the top panel in its  
correct position. Secure the top panel.  
Plastic Plugs  
Top Panel  
Top Panel Bracket  
Upper Hinge  
Control Panel  
Handle  
Door Switch  
Lower Hinge  
Fig. 1  
Plastic Plugs  
36  
Download from Www.Somanuals.com. All Manuals Search And Download.  
VI. Cleaning and Maintenance Instructions  
A. Cleaning  
WARNING  
• Before cleaning the appliance, turn off and unplug the appliance to prevent  
electric shock by unexpected entrance of water into the appliance or injury by  
moving parts.  
• Before cleaning the appliance, move all items into another refrigerator.  
• Do not splash water directly onto the appliance. This might cause short circuit,  
electric shock, corrosion, or failure.  
• Before using a sanitizer such as inert soap and sodium hypochlorite (chlorine  
bleach), thoroughly read the manufacturer’s instructions on its proper usage.  
IMPORTANT  
To prevent damage to the plastic surfaces, do not use the following: thinner,  
benzine, alcohol, petroleum, soap powder, polishing powder, alkaline cleaner,  
acid, scouring pad and especially those strong cleaners for use on a ventilating  
fan or a cooking range. Also, to prevent corrosion, do not use sodium hypochlorite  
(chlorine bleach) on the stainless steel surfaces.  
• Use a clean cloth for cleaning.  
1. Exterior  
Wipe the exterior occasionally with a clean, soft cloth. Use a damp cloth containing a  
neutral cleaner to wipe off oil or dirt buildup.  
2. Cabinet Interior  
Spills should be wiped up promptly to avoid unpleasant odors. The cabinet interior should  
be cleaned periodically with a mild soap or detergent and warm water.  
3. Door Gasket  
Door gasket should be cleaned regularly with mild soap and warm water to remove dirt  
and grease.  
4. Shelves  
Remove and clean regularly.  
B. Maintenance  
1. Condenser  
Check the condenser once a year and use a brush or vacuum cleaner to clean the  
condenser as required.  
2. Power Supply Connection  
If the plug or power cord is damaged, replace it. Be sure to connect the ground wire.  
37  
Download from Www.Somanuals.com. All Manuals Search And Download.  
VII. Preparing the Appliance for Periods of Non-Use  
When shutting down the appliance for more than one week, follow the instructions  
below.  
WARNING  
When preparing the appliance for long storage, prevent the door from closing  
to reduce the risk of children getting trapped. Leave the shelves in place so that  
children may not easily climb inside.  
IMPORTANT  
When preparing the appliance for long storage, clean the cabinet interior, door  
gaskets, and shelves. See "VI.A. Cleaning" for details.  
1) Before shutting down the appliance, move all items into another refrigerator.  
2) Press and hold the power button for 2 sec. to turn off the appliance.  
3) Unplug the appliance. WARNING! To reduce the risk of electric shock, do not touch  
the plug with damp hands.  
38  
Download from Www.Somanuals.com. All Manuals Search And Download.  
VIII. Disposal  
WARNING  
When preparing the appliance for disposal, remove the door to reduce the risk of  
children getting trapped. Leave the shelves in place so that children may not easily  
climb inside.  
This appliance contains refrigerant and must be disposed of in accordance with  
applicable national, state, and local codes and regulations. Refrigerant must be  
recovered by properly certified service personnel.  
39  
Download from Www.Somanuals.com. All Manuals Search And Download.  

Graham Field Medical Alarms GF13605 User Manual
Grandstream Networks Telephone Accessories HT 502 User Manual
Haier Flat Panel Television LEC32B33200 User Manual
Haier Washer XPB60 111S User Manual
Harbor Freight Tools Automobile Parts 41005 User Manual
Honeywell Bluetooth Headset AP 010 BT User Manual
HP Hewlett Packard Laptop 377703 001 User Manual
HP Hewlett Packard Personal Computer Business PC User Manual
Hypertec Carrying Case Z0701 V2 User Manual
Image Home Gym IMBE39400 User Manual