Service & Parts Manual
2007
Compact Programmable
Models
CP14N10
CP18N30
CP24N30
CP-14-18-24-Svc-Prts-07 (3-07)
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Specifications and Technical Parameters
Model
CP14N10
CP18N30
CP24N30
COOLING
230/208V~
60Hz
Function
COOLING
COOLING
Rated Voltage
115V ~
230/208V~
Rated Frequency
Total Capacity (Btu/h)
Power Input (W)
Rated Input (W)
60Hz
60Hz
14000
18000/17600
23500/23100
2740/2710
3538
1430
1850/1810
1540
2478
Rated Current (A)
Air Flow Volume (CFM) (H)
Dehumidifying Volume (pints/h)
EER / C.O.P BTU/W.H)
Energy Class
15
12.57
18.09
458.8
458.8
617.6
3.38
4.65
8.46
9.8
9.7/9.7
8.6/8.5
/
Centrifugal flow fan – 1
φ7.93 X 4.31
Aluminum fin-copper tube
φ0.276
/
Centrifugal flow fan – 1
φ7.93 X 4.31
Aluminum fin-copper tube
φ0.276
/
Fan Type-Piece
Centrifugal flow fan – 1
φ8.82 X 4.31
Aluminum fin-copper tube
φ0.276
Diameter-Length (inch)
Evaporator
Indoor Side
Pipe Diameter (inch)
Coil length (l) x height (H) x coil width (L)
Compressor Type
16.61 X 15 X 1
ROTARY
16.61 X 15 X 1
ROTARY
16.61 X 15 X 1
ROTARY
L.R.A. (A)
58
42
56
Compressor RLA(A)
Compressor Power Input(W)
Overload Protector
Working Temp Range (ºF)
Condenser
10.9
7.45
11.7/11.0
1182
1700
2425/2480
Built in
Outdoor Side
MRA13425-12007
50º-115º
MRA98982-9200
50º-115º
50º-115º
Aluminum fin-copper tube
Axial fan –1
φ15.59
Aluminum fin-copper tube
Axial fan –1
φ15.59
Aluminum fin-copper tube
Axial fan –1
φ15.59
Fan Type-Piece
Fan Diameter (inch)
Fan Motor Speed (rpm) (H/M/L)
900/780/730
200
900/780/730
200
1000/900/800
190
Output of Fan Motor (W)
Fan Motor RLA(A)
3
1.45
1.35
Fan Motor Capacitor (uF)
15 MFD
7 MFD
7 MFD
Permissible Excessive Operating Pressure for the Discharge Side (Psig)
Permissible Excessive Operating Pressure for the Suction Side (Psig)
Dimension (H/W/D)( inch)
300
300
300
150
150
150
16.85 x 25.98 x 28.46
19.96 x 31.1 x 29.13
150/163
16.85 x 25.98 x 28.46
19.96 x 31.1 x 29.13
150/163
16.85 x 25.98 x 29.29
19.69 x 29.29 x 36.22
165/183
Dimension of Package (H/W/D)( inch)
Net Weight /Gross Weight (Pounds)
Refrigerant Charge (Ounce)
R22/26.46
R22/27.87
R22/33.51
Performance Data
EVAP. AIR TEMP.
OPERATING
PRESSURES
BREAKER
FUSE
ELECTRICAL RATINGS
R-22 REF.
CONDENSER
TEMPERATURE
DEG. F
DEG. F
PERFORMANCE
DATA* Cooling
Discharge Suction Super
Sub-Cooling
Voltage
Temp
Temp Heat
Discharge Temp.
Amps
Cool
Amps
Heat Rotor Amps
Locked Charge in
60 Hertz
Amps
Suction Discharge
Air
Drop F.
OZ.
CP14N10
CP18N30
59
58
57
57
56
21
22
23
23
24
118
119
119
117
117
173
173
172
197
195
56
66
66
60
57
41
52
52
44
44
54
55
55
50
50
78
77
77
75
75
267
269
269
264
264
12.1
8.3
/
/
/
/
/
58
26.5
115
230
208
230
208
15
15
38.9/42.4
27.9
33.5
8.5
12.3
13.1
CP24N30
56A(230V)
20
*Rating Conditions:
80 degrees F, room air temp. & 50% relative humidity, with 95 degree F, outside air temp & 40% relative humidity.
3
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Outer Component Identification
Models: CP14N10, CP18N30, CP24N30
Cabinet
Air inlet louver
Front grille
Front intake grille
Air filter
(behind front intake grille)
Power cord
Control panel cover
4
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Installation Dimensions
Models: CP14N10, CP18N30, CP24N30
(Top View)
Fence / obstruction
Over 2'
Over
1'
Over
1'
Wall Or window
(Front View)
(Side View)
Ceiling
Over 1'
Over 1'
25.98"
16.85"
Over 2'
Less than
8.66"
5
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Wiring Diagrams
CP24N30
CP18N30 / CP14N10
6
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Functional Component Definitions
MECHANICAL COMPONENTS
HERMETIC COMPONENTS
Vent door Allows introduction of fresh air into the room and/or
Compressor Motorized device used to compress refrigerant
exhausts stale room air outside (on select models.)
through the sealed system.
Plenum assembly Diffuser with directional louvers used to direct
the conditioned airflow.
Check valve A pressure-operated device used to direct the flow
of refrigerant to the proper capillary tube, during either the heating
or cooling cycle.
Blower wheel Attaches to the indoor side of the fan motor shaft
and is used for distributing unconditioned, room side air though the
heat exchanger and delivering conditioned air into the room.
Capillary tube A cylindrical meter device used to evenly distribute
the flow of refrigerant to the heat exchangers (coils.)
Slinger fan blade Attaches to the outdoor side of the fan motor
shaft and is used to move outside air through the condenser coil,
while slinging condensate water out of the base pan and onto
the condenser coil, thus lowering the temperature and pressures
within the coil.
ELECTRICAL COMPONENTS
Thermostat Used to maintain the specified room side comfort
level
Capacitor Reduces line current and steadies the voltage supply,
while greatly improving the torque characteristics of the fan motor
and compressor motor.
MoneySaver® switch When engaged, it sends the power sup-
ply to the fan motor through the thermostat, which allows for a
cycle-fan operation.
Fan Motor Dual-shafted fan motor operates the indoor blower
wheel and the condenser fan blade simultaneously.
Heat anticipator Used to provide better thermostat and room
air temperature control.
7
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Refrigeration System Sequence of Operation
A good understanding of the basic operation of the refrigera-
tion system is essential for the service technician. Without this
understanding, accurate troubleshooting of refrigeration system
problems will be more difficult and time consuming, if not (in some
cases) entirely impossible. The refrigeration system uses four basic
principles (laws) in its operation they are as follows:
In the case of the capillary tube this is accomplished (by design)
through size (and length) of device, and the pressure difference
present across the device.
Since the evaporator coil is under a lower pressure (due to the
suction created by the compressor) than the liquid line, the liquid
refrigerant leaves the metering device entering the evaporator coil.
As it enters the evaporator coil, the larger area and lower pressure
allows the refrigerant to expand and lower its temperature (heat
intensity). This expansion is often referred to as “boiling”. Since
the unit’s blower is moving Indoor air across the finned surface
of the evaporator coil, the expanding refrigerant absorbs some of
that heat. This results in a lowering of the indoor air temperature,
hence the “cooling” effect.
1. “Heat always flows from a warmer body to a cooler body.”
2. “Heat must be added to or removed from a substance before
a change in state can occur”
3. “Flow is always from a higher pressure area to a lower
pressure area.”
4. “The temperature at which a liquid or gas changes state is
dependent upon the pressure.”
The expansion and absorbing of heat cause the liquid refrigerant
to evaporate (i.e. change to a gas). Once the refrigerant has been
evaporated (changed to a gas), it is heated even further by the
air that continues to flow across the evaporator coil.
The refrigeration cycle begins at the compressor. Starting the
compressor creates a low pressure in the suction line which draws
refrigerant gas (vapor) into the compressor. The compressor then
“compresses” this refrigerant, raising its pressure and its (heat
intensity) Temperature.
The particular system design determines at exactly what point (in
the evaporator) the change of state (i.e. liquid to a gas) takes place.
In all cases, however, the refrigerant must be totally evaporated
(changed) to a gas before leaving the evaporator coil.
The refrigerant leaves the compressor through the discharge line
as a hot high pressure gas (vapor). The refrigerant enters the
condenser coil where it gives up some of its heat. The condenser
fan moving air across the coil’s finned surface facilitates the transfer
of heat from the refrigerant to the relatively cooler outdoor air.
The low pressure (suction) created by the compressor causes
the refrigerant to leave the evaporator through the suction line
as a cool low pressure vapor. The refrigerant then returns to the
compressor, where the cycle is repeated.
When a sufficient quantity of heat has been removed from the
refrigerant gas (vapor), the refrigerant will “condense” (i.e. change
to a liquid). Once the refrigerant has been condensed (changed)
to a liquid it is cooled even further by the air that continues to flow
across the condenser coil.
Refrigerant System Components
The RAC design determines at exactly what point (in the condenser)
the change of state (i.e. gas to a liquid) takes place. In all cases,
however, the refrigerant must be totally condensed (changed) to a
liquid before leaving the condenser coil.
Suction
Line
Discharge
Line
Evaporator
Coil
Condenser
Coil
The refrigerant leaves the condenser coil through the liquid line
as a warm high pressure liquid. It next will pass through the
refrigerant drier (if so equipped). It is the function of the drier to
trap any moisture present in the system, contaminants, and large
particulate matter.
Compressor
Metering
Device
Refrigerant Drier
Liquid
Line
The liquid refrigerant next enters the metering device. The
metering device is a capillary tube. The purpose of the metering
device is to “meter” (i.e. control or measure) the quantity of
refrigerant entering the evaporator coil.
Refrigerant
Dryer
8
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Sealed Refrigeration System Repairs
IMPORTANT
ANY SEALED SYSTEM REPAIRS TO COOL-ONLY MODELS REQUIRE THE INSTALLATION OF A LIQUID LINE DRIER.
ALSO, ANY SEALED SYSTEM REPAIRS TO HEAT PUMP MODELS REQUIRE THE INSTALLATION OF A SUCTION LINE DRIER.
EQUIPMENT REQUIRED
HERMETIC COMPONENT REPLACEMENT cont’d
1. Voltmeter
6. Pressurize system to 30 PSIG with proper refrigerant and boost
refrigerant pressure to 150 PSIG with dry nitrogen.
2. Ammeter
7. Leak test complete system with electric halogen leak
detector, correcting any leaks found.
3. Ohmmeter
4. E.P.A. Approved Refrigerant Recovery System.
8. Reduce the system to zero gauge pressure.
5.
Vacuum Pump (capable of 200 microns or less vacuum.)
9. Connect vacuum pump to high side and low side of system
with deep vacuum hoses, or copper tubing. (Do not use
regular hoses.)
6. Acetylene Welder
7. Electronic Halogen Leak Detector (G.E. Type H-6 or
equivalent.)
10. Evacuate system to maximum absolute holding pressure
of 200 microns or less. NOTE: This process can be
accelerated by use of heat lamps, or by breaking the
vacuum with refrigerant or dry nitrogen at 5,000 microns.
Pressure system to 5 PSIG and leave in system a
minimum of 10 minutes. Release refrigerant, and proceed
with evacuation of a pressure of 200 microns or less.
8. Accurate refrigerant charge measuring device such as:
a. Balance Scales - 1/2 oz. accuracy
b. Charging Board - 1/2 oz. accuracy
9. High Pressure Gauge - (0 - 400 lbs.)
10. Low Pressure Gauge - (30 - 150 lbs.)
11. Vacuum Gauge - (0 - 1000 microns)
11. Break vacuum by charging system from the high side with
the correct amount of liquid refrigerant specified. This will
prevent boiling the oil out of the crankcase, and damage
to the compressor due to over heating.
EQUIPMENT MUST BE CAPABLE OF:
1. Recovery CFC’s as low as 5%.
2. Evacuation from both the high side and low side of the
system simultaneously.
NOTE: If the entire charge will not enter the high side, allow the
remainder to enter the low side in small increments while operating
the unit.
3. Introducing refrigerant charge into high side of the
system.
12.
Restart unit several times after allowing pressures to stabilize.
Pinch off process tubes, cut and solder the ends. Remove
pinch off tool, and leak check the process tube ends.
4. Accurately weighing the refrigerant charge actually
introduced into the system.
5. Facilities for flowing nitrogen through refrigeration tubing
during all brazing processes.
SPECIAL PROCEDURE IN THE CASE OF COMPRESSOR
MOTOR BURNOUT
HERMETIC COMPONENT REPLACEMENT
1. Recover all refrigerant and oil from the system.
The following procedure applies when replacing components
in the sealed refrigeration circuit or repairing refrigerant leaks.
(Compressor, condenser, evaporator, capillary tube, refrigerant
leaks, etc.)
2. Remove compressor, capillary tube and filter drier from the
system.
3. Flush evaporator condenser and all connecting tubing with
dry nitrogen or equivalent, to remove all contamination
from system. Inspect suction and discharge line for carbon
deposits. Remove and clean if necessary.
1. Recover the refrigerant from the system at the process
tube located on the high side of the system by installing a
line tap on the process tube. Apply gauge from process
tube to EPA approved gauges from process tube to EPA
approved recovery system. Recover CFC’s in system to at
least 5%.
4. Reassemble the system, including new drier strainer and
capillary tube.
5. Proceed with processing as outlined under hermetic
component replacement.
2. Cut the process tube below pinch off on the suction side
of the compressor.
ROTARY COMPRESSOR SPECIAL TROUBLESHOOTING
AND SERVICE
3. Connect the line from the nitrogen tank to the suction
process tube.
Basically, troubleshooting and servicing rotary compressors
is the same as on the reciprocating compressor with only one
main exception:
4. Drift dry nitrogen through the system and un-solder the
more distant connection first. (Filter drier, high side process
tube, etc.)
NEVER, under any circumstances, charge a rotary compressor
through the LOW side. Doing so would cause permanent damage
to the new compressor.
5. Replace inoperative component, and always install a new
filter drier. Drift dry nitrogen through the system when
making these connections.
9
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Refrigerant Charging
NOTE: BECAUSE THE RAC SYSTEM IS A SEALED SYSTEM,
SERVICE PROCESS TUBES WILL HAVE TO BE INSTALLED.
FIRST INSTALL A LINE TAP AND REMOVE REFRIGERANT
FROM SYSTEM. MAKE NECESSARY SEALED SYSTEM
REPAIRS AND VACUUM SYSTEM. CRIMP PROCESS TUBE
LINE AND SOLDER END SHUT. DO NOT LEAVE A SERVICE
VALVE IN THE SEALED SYSTEM.
METHOD OF CHARGING
The acceptable method for charging the RAC system is the
Weighed in Charge Method. The weighed in charge method is
applicable to all units. It is the preferred method to use, as it is the
most accurate.
The weighed in method should always be used whenever a charge
is removed from a unit such as for a leak repair, compressor
replacement, or when there is no refrigerant charge left in the unit.
To charge by this method, requires the following steps:
Proper refrigerant charge is essential to proper unit operation.
Operating a unit with an improper refrigerant charge will result in
reduced performance (capacity) and/or efficiency. Accordingly,
the use of proper charging methods during servicing will insure
that the unit is functioning as designed and that its compressor
will not be damaged.
1. Install a piercing valve to remove refrigerant from the
sealed system. (Piercing valve must be removed from
the system before recharging.)
2. Recover Refrigerant in accordance with EPA
regulations.
Too much refrigerant (overcharge) in the system is just as bad (if
not worse) than not enough refrigerant (undercharge). They both
can be the source of certain compressor failures if they remain
uncorrected for any period of time. Quite often, other problems
(such as low air flow across evaporator, etc.) are misdiagnosed as
refrigerant charge problems. The refrigerant circuit diagnosis chart
will assist you in properly diagnosing these systems.
3. Install a process tube to sealed system.
4. Make necessary repairs to system.
5. Evacuate system to 250 - 300 microns or less.
6. Weigh in refrigerant with the property quantity of R-22
refrigerant.
An overcharged unit will at times return liquid refrigerant (slugging)
back to the suction side of the compressor eventually causing a
mechanical failure within the compressor. This mechanical failure
can manifest itself as valve failure, bearing failure, and/or other
mechanical failure. The specific type of failure will be influenced
by the amount of liquid being returned, and the length of time the
slugging continues.
7. Start unit, and verify performance.
8. Crimp the process tube and solder the end shut.
Not enough refrigerant (Undercharge) on the other hand, will cause
the temperature of the suction gas to increase to the point where it
does not provide sufficient cooling for the compressor motor. When
this occurs, the motor winding temperature will increase causing
the motor to overheat and possibly cycle open the compressor
overload protector. Continued overheating of the motor windings
and/or cycling of the overload will eventually lead to compressor
motor or overload failure.
NOTE: In order to access the sealed system it will be necessary to install Schrader type fittings to the process tubes
on the discharge and suction of the compressor. Proper refrigerant recovery procedures need to be adhered to as
outlined in EPA Regulations. THIS SHOULD ONLY BE ATTEMPTED BY QUALIFIED SERVICE PERSONNEL.
10
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Refrigerant Charging
UNDERCHARGED REFRIGERANT SYSTEMS
An undercharged system will result in poor performance (low
pressures, etc.) in both the heating and cooling cycle.
low charge, however, frosting and thawing can also be caused by
insufficient air over the evaporator.
Whenever you service a unit with an undercharge of refrigerant,
always suspect a leak. The leak must be repaired before charging
the unit.
Checks for an undercharged system can be made at the compressor
. If the compressor seems quieter than normal, it is an indication of
a low refrigerant charge. A check of the amperage drawn by the
compressor motor should show a lower reading. (Check the Unit
Specification.) After the unit has run 10 to 15 minutes, check the
gauge pressures.
To check for an undercharged system, turn the unit on, allow the
compressor to run long enough to establish working pressures in
the system (15 to 20 minutes).
Gauges connected to system with an undercharge will have low
head pressures and substantially low suction pressures.
During the cooling cycle you can listen carefully at the exit of the
metering device into the evaporator; an intermittent hissing and
gurgling sound indicates a low refrigerant charge. Intermittent
frosting and thawing of the evaporator is another indication of a
NOTE: Heat pump
refrigeration
drawing
OVERCHARGED REFRIGERANT SYSTEMS
Compressor amps will be near normal or higher. Noncondensables
can also cause these symptoms. To confirm, remove some of the
charge, if conditions improve, system may be overcharged. If condi-
tions don’t improve, Noncondensables are indicated.
An over charge can cause the compressor to fail, since it would
be “slugged” with liquid refrigerant.
The charge for any system is critical. When the compressor is noisy,
suspect an overcharge, when you are sure that the air quantity over
the evaporator coil is correct. Icing of the evaporator will not be
encountered because the refrigerant will boil later if at all. Gauges
connected to system will usually have higher head pressure
(depending upon amount of overcharge). Suction pressure should
be slightly higher.
Whenever an overcharged system is indicated, always make sure
that the problem is not caused by air flow problems. Improper
air flow over the evaporator coil may indicate some of the same
symptoms as an overcharged system.
11
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Refrigerant Charging
RESTRICTED REFRIGERANT SYSTEM
A quick check for either condition begins at the evaporator. With
a partial restriction, there may be gurgling sounds at the metering
device entrance to the evaporator. The evaporator in a partial
restriction could be partially frosted or have an ice ball close to the
entrance of the metering device. Frost may continue on the suction
line back to the compressor.
Troubleshooting a restricted refrigerant system can be
difficult. The following procedures are the more common
problems and solutions to these problems. There are two
types of refrigerant restrictions: Partial restrictions and
complete restrictions.
• A partial restriction allows some of the refrigerant to circulate
through the system.
Often a partial restriction of any type can be found by feel, as
there is a temperature difference from one side of the restriction
to the other.
• With a complete restriction there is no circulation of refrigerant
in the system.
With a complete restriction, there will be no sound at the metering
device entrance. An amperage check of the compressor with a
partial restriction may show normal current when compared to the
unit specification. With a complete restriction the current drawn may
be considerably less than normal, as the compressor is running
in a deep vacuum (no load). Much of the area of the condenser
will be relatively cool since most or all of the liquid refrigerant will
be stored there.
• Restricted refrigerant systems display the same symptoms as
a “low-charge condition.”
• When the unit is shut off, the gauges may equalize very
slowly.
• Gauges connected to a completely restricted system will run
in a deep vacuum. When the unit is shut off, the gauges will
not equalize at all.
The following conditions are based primarily on a system in the
cooling mode.
12
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Cooling Only Room Air Conditioners: Troubleshooting Tips
Problem
Possible Cause
Action
Check voltage at compressor. 115V & 230V units
will operate at 10% voltage variance
Low voltage
Set t-stat to coldest position. Test t-stat & replace if
inoperative
T-stat not set cold enough or inoperative
Hard start compressor. Direct test compressor. If
compressor starts, add starting components
Compressor hums but cuts off on B10 overload
Open or shorted compressor windings
Compressor
does not run
Check for continuity & resistance
Open overload
Open capacitor
Test overload protector & replace if inoperative
Test capacitor & replace if inoperative
Test for continuity in all positions. Replace if inop-
erative
Inoperative system switch
Broken, loose or incorrect wiring
Refer to appropriate wiring diagrams to check wiring
Problem
Possible Cause
Inoperative system switch
Broken, loose or incorrect wiring
Open capacitor
Action
Test switch & replace if inoperative
Refer to applicable wiring diagram
Test capacitor & replace if inoperative
Test switch & replace if inoperative
Fan motor
does not run
Fan speed switch open
Test fan motor & replace if inoperative (be sure
internal overload has had time to reset)
Inoperative fan motor
Problem
Possible Cause
Action
Undersized unit
Refer to industry standard sizing chart
Set to coldest position. Test t-stat & replace if neces-
sary
T-stat open or inoperative
Dirty filter
Clean as recommended in Owner's Manual
Use pressure wash or biodegradable cleaning agent
to clean
Dirty or restricted condenser or evaporator coil
Poor air circulation
Does not cool or
only cools slightly
Adjust discharge louvers. Use high fan speed
Close doors. Instruct customer on use of this feature
Check for leak & make repair
Fresh air or exhaust air door open on applicable
models
Low capacity - undercharge
Check amperage draw against nameplate. If not
conclusive, make pressure test
Compressor not pumping properly
13
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Cooling Only Room Air Conditioners: Troubleshooting Tips
Problem
Possible Cause
Action
Replace fuse, reset breaker. If repeats, check fuse
or breaker size. Check for shorts in unit wiring &
components
Fuse blown or circuit tripped
Power cord not plugged in
System switch in "OFF" position
Inoperative system switch
Plug it in
Unit does not run
Set switch correctly
Test for continuity in each switch position
Loose or disconnected wiring at switch or other
components
Check wiring & connections. Reconnect per wiring
diagram
Problem
Possible Cause
Action
Dirty filter
Clean as recommended in Owner's Manual
Check for dirty or obstructed coil. Use pressure
wash or biodegradable cleaning agent to clean
Restricted airflow
Inoperative t-stat
Test for shorted t-stat or stuck contacts
De-ice coil & check for leak
Evaporator coil
freezes up
Short of refrigerant
Inoperative fan motor
Test fan motor & replace if inoperative
De-ice coil. Check temp. differential (delta T) across
coil. Touch test coil return bends for same temp.
Test for low running current
Partially restricted capillary tube
Problem
Possible Cause
Action
Unit undersized. Test cooling performance & replace
with larger unit if needed
Excessive heat load
Check for partially iced coil & check temperature
split across coil
Restriction in line
Refrigerant leak
Compressor runs
continually & does not
cycle off
Check for oil at silver soldered connections. Check
for partially iced coil. Check split across coil. Check
for low running amperage
Check operation of t-stat. Replace if contacts
remain closed.
T-stat contacts stuck
T-stat incorrectly wired
Refer to appropriate wiring diagram
Problem
Possible Cause
Action
Disconnect power to unit. Remove cover of t-stat &
check if contacts are stuck. If so, replace t-stat
T-stat contacts stuck
T-stat does not turn
unit off
T-stat set at coldest point
Incorrect wiring
Turn to higher temp. setting to see if unit cycles off
Refer to appropriate wiring diagrams
Unit undersized for area to be cooled
Refer to industry standard sizing chart
14
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Cooling Only Room Air Conditioners: Troubleshooting Tips
Problem
Possible Cause
Action
Check operation of unit. Replace overload if system
operation is satisfactory
Overload inoperative. Opens too soon
Allow a minimum of 2 minutes to allow pressures
to equalize before attempting to restart. Instruct
customer of waiting period
Compressor restarted before system pressures
equalized
Check voltage with unit operating. Check for
other appliances on circuit. Air conditioner should
be in separate circuit for proper voltage & fused
separately
Low or fluctuating voltage
Compressor runs for
short periods only.
Cycles on overload
Incorrect wiring
Refer to appropriate wiring diagram
Check by substituting a known good capacitor of
correct rating
Shorted or incorrect capacitor
Restricted or low air flow through condenser coil
Check for proper fan speed or blocked condenser
Check for kinked discharge line or restricted
condenser. Check amperage
Compressor running abnormally hot
Problem
Possible Cause
Action
Place jumper across t-stat terminals to check if unit
operates. If unit operates, replace t-stat.
Loss of charge in t-stat bulb
T-stat does not
turn unit on
Loose or broken parts in t-stat
Incorrect wiring
Check as above
Refer to appropriate wiring diagram
Problem
Possible Cause
Poorly installed
Action
Refer to Installation Manual for proper installation
Reposition - adjust motor mount
Fan blade striking chassis
Check that compressor grommets have not
deteriorated. Check that compressor mounting parts
are not missing
Noisy operation
Compressor vibrating
Check assembly & parts for looseness, rubbing &
rattling
Improperly mounted or loose cabinet parts
Problem
Possible Cause
Action
Evaporator drain pan overflowing
Clean obstructed drain trough
Evaporator drain pan broken or cracked. Reseal or
replace
Condensation forming on base pan
Poor installation resulting in rain entering the room
Check installation instructions. Reseal as required
Water leaks into the
room
Clean the dirty evaporator coil. Use pressure wash
or biodegradable cleaning agent to clean
Condensation on discharge grille louvers
Chassis gasket not installed
Install gasket, per Installation manual
Downward slope of unit is too steep
Refer to installation manual for proper installation
15
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Cooling Only Room Air Conditioners: Troubleshooting Tips
Problem
Possible Cause
Action
Ensure that foam gaskets are installed in between
window panes & in between the unit & the sleeve.
Also, ensure that fresh air/exhaust vents (on
applicable models) are in the closed position & are
in tact
Sublimation:
When
unconditioned saturated, outside air mixes with
conditioned air, condensation forms on the cooler
surfaces
Water "spitting"
into room
Follow installation instructions to ensure that
downward pitch of installed unit is no less than 1/4"
& no more than 3/8"
Downward pitch of installation is too steep
Clean & advise customer of periodic cleaning &
maintenance needs of entire unit
Restricted coil or dirty filter
Problem
Possible Cause
Action
Adjust louvers for best possible air circulation
Operate in "MoneySaver" position
Advise customer
Insufficient air circulation thru area to be air
conditioned
Excessive moisture
Oversized unit
Inadequate vapor barrier in building structure,
particularly floors
Problem
Possible Cause
Action
T-stat differential too narrow
Replace t-stat
Plenum gasket not sealing, allowing discharge air to
short cycle t-stat
Check gasket. Reposition or replace as needed
T-stat short cycles
Clean & advise customer of periodic cleaning &
maintenance needs of entire unit
Restricted coil or dirty filter
Problem
Possible Cause
Action
Anticipator (resistor) wire disconnected at t-stat or
system switch
Refer to appropriate wiring diagram
Disconnect plus from outlet. Remove resistor from
bracket. Insert plug & depress "COOL" & "FAN
AUTOMATIC" buttons. Place t-stat to warmest
setting. Feel resistor for temperature. If no heat,
replace resistor
Prolonged off cycles
(automatic operation)
Anticipator (resistor) shorted or open
Partial loss of charge in t-stat bulb causing a wide
differential
Replace t-stat
Problem
Possible Cause
Action
Evaporator drain pan cracked or obstructed
Repair, clean or replace as required
Detach shroud from pan & coil. Clean & remove old
sealer. Reseal, reinstall & check
Water in compressor area
Outside water leaks
Use pressure wash or biodegradable cleaning agent
to clean
Obstructed condenser coil
Fan blade/slinger ring improperly positioned
Adjust fan blade to 1/2" of condenser coil
16
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Heat / Cool Room Air Conditioners: Troubleshooting Tips
Problem
Possible Cause
Action
Disconnect power to unit. Remove resistor from t-
stat bulb block. Plus in unit & allow to operate. Feel
resistor for heat. If not heat, replace resistor
Heat anticipator (resistor) shorted (on applicable
models)
Room temperature
uneven
(Heating cycle)
Wide differential - partial loss of t-stat bulb charge
Incorrect wiring
Replace t-stat & check
Refer to appropriate wiring diagram. Resistor is
energized during "ON" cycle of compressor or fan.
Problem
Possible Cause
Action
Incorrect wiring
Refer to appropriate wiring diagram
Defrost control timer motor not advancing
(applicable models)
Check for voltage at "TM" & "TM1" on timer. If no
voltage, replace control
If outside coil temperature is 25F or below, &
Defrost control out of calibration (applicable models) preselected time limit has elapsed, replace defrost
control
Unit will not defrost
If contacts remain closed between terminals "2"
Defrost control contacts stuck
& "3" of the defrost control after preselected time
interval has passed, replace control
Defrost control bulb removed from or not making
good coil contact
Reinstall & be assured that good bulb to coil contact
is made
Problem
Possible Cause
Exhaust or fresh air door open
Dirty filter
Action
Check if operating properly. Instruct customer on
proper use of control
Clean as recommended in Owner's Manual
Check heat rise across coil. If unit operates
efficiently, check if insulation can be added to attic
or walls. If insulation is adequate, recommend
additional unit or larger one
Unit undersized
Does not heat
adequately
T-stat should close at 38°F. Check continuity of
control. If temperature is below 38°F, replace control
Outdoor t-stat open (applicable models)
Heater hi-limit control cycling on & off
Check for adequate fan air across heater. Check
control for open at 160°F & close at 150°F
Shorted supplementary heater
Incorrect wiring
Ohmmeter check, approx. 32-35 ohms
Check applicable wiring diagram
17
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Heat / Cool Room Air Conditioners: Troubleshooting Tips
Problem
Possible Cause
Action
Refer to applicable wiring diagram
Check for continuity of coil
Incorrect wiring
Defective solenoid coil
Unit cools when heat
is called for
Block condenser coil & switch unit to cooling. Allow
pressure to build up in system, then switch to
heating. If valve fails to shift, replace valve.
Reversing valve fails to shift
Inoperative system switch
Check for continuity of system switch
Problem
Possible Cause
Action
Check for partially starved outer coil. Replace
heating capillary tube
Heating capillary tube partially restricted
Switch unit several times from heating to cooling.
Check temperature rise across coil. Refer to
specification sheet for correct temperature rise
Cooling adequate,
but heating
Check valve leaking internally
insufficient
De-energize solenoid coil, raise head pressure,
energize solenoid to break loose. If valve fails to
make complete shift, replace valve.
Reversing valve failing to shift completely;
bypassing hot gas
18
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Components
Model CP14N10
19
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Model CP14N10
No Description
Qty
Friedrich Part#
Code
1
2
3
4
5
6
7
8
9
Supporter Assy
Screw ST4.2X13
Window locking bracket
Screw 4X20
Seal strip 1
Seal strip 2
Curtain Assemby Left and Right
Right Curtain
Left Curtain
1
7
2
6
1
1
1
1
1
1
6
1
1
1
1
4
1
4
1
1
1
1
1
1
1
1
1
1
1
2
2
1
1
1
1
1
67700200
67700154
67700113
67700151
67700128
67700129
67700201
67700202
67700203
67700204
67700155
67700149
67700170
67700205
67700158
67700153
67700206
67700152
67700207
67700157
67700159
67700117
67700208
67700110
67700112
67700209
67700109
67700127
67700130
67700210
67700124
67700211
67700121
67700125
67700212
67700116
10 Cabinet Assy
11 Screw ST4.2X6.5
12 Screw M4X8
13 Connect cord
14 Screw M4X5
15 Washer 4
16 Screw ST4.2X22
17 Top Rail Assy
18 Screw ST4X10
19 Condenser Assy
20 Nut with Washer M10
21 Washer 10
22 Fan Blade
23 Shroud, Fan Blade
24 Top Cover
25 Motor Support
26 Motor CJ100U
27 Innerwall
28 Shroud
29 Air Outlet Foam
30 Swing Louver
31 Swing Linkage
32 Motor, Swing Louver
33 Inflectional Axis
34 Swing Support
35 Fresh Air Door
36 Blower Wheel
20
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Model CP14N10
No Description
Qty
Friedrich Part#
Code
37 Clapboard of Snail Shell
38 Base Plate of Air Flue
39 Evaporator Assy
40 Sensor Holder
41 Compressor 44B124HXCEF
42 Overload Protector
43 Compressor Gasket
44 Nut with washer M8
45 Capillary Assy
1
1
1
1
1
1
3
3
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
14
1
1
1
1
1
1
1
67700108
67700106
67700103
67700213
67700214
67700215
67700216
67700156
67700217
67700131
67700218
67700219
67700220
67700221
67700114
67700222
67700136
67700223
67700160
67700224
67700225
67700226
67700227
67700228
67700229
67700230
67700231
67700232
67700233
67700234
67700235
67700236
67700237
67700105
67700171
46 Water Tray
47 Capacitor 15uF/300VAC
48 Capacitor 50uF/450V
49 Relay 841-S-1A-D 110/120V
50 Transformer 41X26.5C
51 Capacitor clamp
52 Main PCB M2A91J
53 Electric box
54 Isolation Washer D
55 Wire Clamp
56 Power cord
57 Receiver Cover
58 Membrane
59 Control Panel Cover A
60 Display Board 2A91J
61 Front Panel Assy
62 Guide Louver Linkage
63 Filter
64 Guide Louver
65 Front Case
66 Front Panel
67 AS Window
68 Remote Cover
69 Chassis
70 Chassis Fixer
71 Remote Control
21
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Models CP18C30 & CP18N30
No Description
Qty
Friedrich Part#
Code
1
2
3
4
5
6
7
8
9
Supporter Assy
1
7
2
6
1
1
1
1
1
1
6
1
1
1
1
6
1
4
1
1
1
1
1
1
1
1
1
1
1
2
2
1
1
1
1
67700132
67700154
67700113
67700151
67700128
67700129
67700166
67700168
67700167
67700111
67700155
67700149
67700170
67700150
67700158
67700153
67700134
67700152
67700104
67700157
67700159
67700117
67700107
67700110
67700112
67700164
67700109
67700127
67700130
67700120
67700124
67700133
67700121
67700125
67700123
Self-threading Screw ST4.2x22
Window Locking Bracket
Screw 4X20
Seal Strip 1
Seal Strip 2
Curtain Assemby Left and Right
Right Curtain
Left Curtain
10 Cabinet Assy
11 Self-threading Screw ST4.2X6.5
12 Screw Assay M4x8
13 Connect Cord
14 Screw M4X6
15 Washer 4
16 Self-threading Screw ST4.2x22
17 Top Rail
18 Self-threading Screw with Gasket ST4X10
19 Condenser Assy
20 Nut with Washer M10
21 Washer 6
22 Fan Blade
23 Shroud, Fan Blade
24 Upper Clapboard
25 Motor Support
26 Motor CJ100B
27 Innerwall
28 Blower Front
29 Air Outlet Foam 1
30 Swing Louver
31 Lever of Vertical Guider
32 Swing Motor SM020B
33 Inflectional Axis
34 Cross Beam
35 Fresh Air Door
22
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Models CP18C30 & CP18N30
No Description
Qty
Friedrich Part#
Code
36 Blower Wheel
1
1
1
1
2
1
1
3
3
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
8
1
1
1
1
1
1
1
1
67700116
67700108
67700106
67700103
67700141
67700101
67700102
67700161
67700156
67700115
67700131
67700145
67700144
67700147
67700146
67700114
67700136
67700142
67700160
67700169
67700143
67700138
67700137
67700148
67700165
67700122
67700163
67700118
67700119
67700140
67700139
67700135
67700126
67700105
67700162
67700171
37 Front Clapboard of Snail Shell
38 Base Plate of Air Flue
39 Evaporator Assy
40 Insert Block
41 Compressor 2K25S236AHF
42 Overload Protector
43 Compressor Gasket AD7070815
44 Nut with Washer M8
45 Capillary Assay
46 Water Tray
47 Capacitor 7uF/450V
48 Capacitor CBB65 40uF/450V(TUV)
49 Relay 841-S-1A-D 200V/240V TUV
50 Power Transformer 41X26.5F
51 Capacitor Clamp
52 Electric box
53 Main PCB J25713J
54 Fixed Clamp
55 Power cord
56 Display Board J25713J
57 Receiver Cover
58 Control Panel Cover
59 Touch Pad Plate
60 Front Panel Assy
61 Guide louver linkage
62 Filter
63 Horizontal air guider1
64 Horizontal air guider2
65 Up Filter Guide
66 Down Filter Guide
67 Panel
68 Basepan
69 Chassis Fixer
70 Drain Plug
71 Remote Control
23
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Components
Model CP24N30
24
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Model CP24N30
No Description
Qty
Friedrich Part#
Code
1
2
3
4
5
6
7
8
9
Supporter Assy
Screw ST4.2X13
Window locking bracket
Screw 4X20
Seal strip 1
Seal strip 2
LT & RT Curtain Assembly
Right Curtain
Left Curtain
1
7
2
6
1
1
1
1
1
1
6
1
1
1
1
4
1
4
1
1
1
1
1
1
1
1
1
1
1
2
2
1
1
1
1
1
1
67700200
67700154
67700113
67700151
67700128
67700129
67700201
67700202
67700203
67700238
67700155
67700149
67700170
67700205
67700158
67700153
67700206
67700152
67700239
67700157
67700159
67700117
67700208
67700240
67700112
67700241
67700109
67700242
67700130
67700210
67700124
67700133
67700121
67700125
67700212
67700243
67700108
10 Cabinet Assy
11 Screw ST4.2X6.5
12 Screw M4X8
13 Connect cord
14 Screw M4X5
15 Washer 4
16 Screw ST4.2X22
17 Top Rail Assy
18 Screw ST4X10
19 Condenser Assy
20 Nut with Washer M10
21 Washer 10
22 Fan Blade
23 Shroud, Fan Blade
24 Top Cover
25 Motor Support
26 Motor CJ100U
27 Innerwall
28 Shroud
29 Air Outlet Foam
30 Swing Louver
31 Swing Linkage
32 Motor, Swing Louver
33 Inflectional Axis
34 Swing Support
35 Fresh Air Door
36 Blower Wheel
37 Blower Front
25
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Model CP24N30
No Description
Qty
Friedrich Part#
Code
38 Base Plate of Air Flue
39 Evaporator Assy
40 Sensor Holder
41 Compressor 44B124HXCEF
42 Overload Protector
43 Compressor Gasket
44 Nut with washer M8
45 Capillary Assy
1
1
1
1
1
3
3
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
14
1
1
1
1
1
1
1
67700106
67700103
67700213
67700244
67700215
67700216
67700156
67700245
67700131
67700145
67700246
67700147
67700247
67700114
67700248
67700136
67700223
67700160
67700249
67700225
67700226
67700227
67700228
67700229
67700230
67700231
67700232
67700233
67700234
67700235
67700236
67700250
67700105
67700171
46 Water Tray
47 Capacitor 15uF/300VAC
48 Capacitor 50uF/450V
49 Relay 841-S-1A-D 110/120V
50 Transformer 41X26.5C
51 Capacitor clamp
52 Main PCB M2A91J
53 Electric box
54 Isolation Washer D
55 Wire Clamp
56 Power cord
57 Receiver Cover
58 Touch Pad Plate
59 Control Panel Cover A
60 Display Board 2A91J
61 Front Panel Assy
62 Guide Louver Linkage
63 Filter
64 Guide Louver
65 Front Case
66 Front Panel
67 AS Window
68 Remote Cover
69 Basepan
70 Chassis Fixer
71 Remote Control
26
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Friedrich Air Conditioning Company
P.O. Box 1540
San Antonio, TX 78295
210.357.4400
ROOM AIR CONDITIONERS
LIMITED WARRANTY
FIRST YEAR
ANY PART: If any part supplied by FRIEDRICH fails because of a defect in workmanship or material within twelve months from
date of original purchase, FRIEDRICH will repair the product at no charge, provided room air conditioner is reasonably accessible
for service. Any additional labor cost for removing inaccessible units and/or charges for mileage related to travel by a Service
Agency that exceeds 25 miles one way will be the responsibility of the owner. This remedy is expressly agreed to be the exclusive
remedy within twelve months from the date of the original purchase.
SECOND THROUGH FIFTH YEAR
SEALED REFRIGERANT SYSTEM: If the Sealed Refrigeration System (defined for this purpose as the compressor, condenser
coil, evaporator coil, reversing valve, check valve, capillary, filter drier, and all interconnecting tubing) supplied by FRIEDRICH in
your Room Air Conditioner fails because of a defect in workmanship or material within sixty months from date of purchase,
FRIEDRICH will pay a labor allowance and parts necessary to repair the Sealed Refrigeration System; PROVIDED FRIEDRICH will
not pay the cost of diagnosis of the problem, removal, freight charges, and transportation of the air conditioner to and from the
Service Agency, and the reinstallation charges associated with repair of the Sealed Refrigeration System. All such cost will be the
sole responsibility of the owner. This remedy is expressly agreed to be the exclusive remedy within sixty months from the date of the
original purchase.
APPLICABILITY AND LIMITATIONS: This warranty is applicable only to units retained within the Fifty States of the U.S.A., District
of Columbia, and Canada. This warranty is not applicable to:
1. Air filters or fuses.
2. Products on which the model and serial numbers have been removed.
3. Products which have defects or damage which results from improper installation, wiring, electrical current
characteristics, or maintenance; or caused by accident, misuse or abuse, fire, flood, alterations and/or misapplication
of the product and/or units installed in a corrosive atmosphere, default or delay in performance caused by war,
government restrictions or restraints, strikes, material shortages beyond the control of FRIEDRICH, or acts of God.
OBTAINING WARRANTY PERFORMANCE: Service will be provided by the FRIEDRICH Authorized Dealer or Service
Organization in your area. They are listed in the Yellow Pages. If assistance is required in obtaining warranty performance, write
to: Room Air Conditioner Service Manager, Friedrich Air Conditioning Co., P.O. Box 1540, San Antonio, TX 78295-1540.
LIMITATIONS:
THIS WARRANTY IS GIVEN IN LIEU OF ALL OTHER WARRANTIES. Anything in the warranty
notwithstanding, ANY IMPLIED WARRANTIES OF FITNESS FOR PARTICULAR PURPOSE AND/OR MERCHANTABILITY
SHALL BE LIMITED TO THE DURATION OF THIS EXPRESS WARRANTY. MANUFACTURER EXPRESSLY DISCLAIMS AND
EXCLUDES ANY LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGE FOR BREACH OF ANY EXPRESSED OR
IMPLIED WARRANTY.
NOTE: Some states do not allow limitations on how long an implied warranty lasts, or do not allow the limitation or exclusion of
consequential or incidental damages, so the foregoing exclusions and limitations may not apply to you.
OTHER: This warranty gives you specific legal rights, and you may also have other rights which vary from state to state.
PROOF OF PURCHASE: Owner must provide proof of purchase in order to receive any warranty related services.
All service calls for explaining the operation of this product will be the sole responsibility of the consumer.
All warranty service must be provided by an Authorized FRIEDRICH Service Agency, unless authorized by FRIEDRICH prior to
repairs being made.
(10-04)
Friedrich Air Conditioning Co.
Post Office Box 1540 • San Antonio, Texas 78295-1540
4200 N. Pan Am Expressway • San Antonio, Texas 78218-5212
(210) 357-4400 • FAX (210) 357-4480
CP-14-18-24-Svc-Prts-07 (3-07)
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Friedrich Air Conditioning Co.
Post Office Box 1540 • San Antonio, Texas 78295-1540
4200 N. Pan Am Expressway • San Antonio, Texas 78218-5212
(210) 357-4400 • FAX (210) 357-4480
CP-14-18-24-Svc-Prts-07 (3-07)
Printed in the U.S.A.
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