Friedrich CP14-18-24 CP24N30 User Manual

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Service & Parts Manual 2007

Compact Programmable

Models

CP14N10

CP18N30

CP24N30

CP-14-18-24-Svc-Prts-07(3-07)

Table of Contents

 

Performance Data........................................................................................................................................................................

3

Outer Component Identification...................................................................................................................................................

4

Installation Dimensions ................................................................................................................................................................

5

Wiring Diagrams...........................................................................................................................................................................

6

Functional Component Definitions ...............................................................................................................................................

7

Refrigeration System Sequence of Operation ............................................................................................................................

8

Sealed Refrigeration System Repairs ....................................................................................................................................

9-12

Troubleshooting .....................................................................................................................................................................

13-18

Part Diagrams and Part Lists................................................................................................................................................

19-23

Warranty .....................................................................................................................................................................................

24

The information contained in this manual is intended for use by a qualified service technician who is familiar with the safety procedures required in installation and repair, and who is equipped with the proper tools and test instruments.

Installation or repairs made by unqualified persons can result in hazards subjecting the unqualified person making such repairs to the risk of injury or electrical shock which can be serious or even fatal not only to them, but also to persons being served by the equipment.

If you install or perform service on equipment, you must assume responsibility for any bodily injury or property damage which may result to you or others. Friedrich Air Conditioning Company will not be responsible for any injury or property damage arising from improper installation, service, and/or service procedures.

2

Specifications and Technical Parameters

Model

 

CP14N10

CP18N30

CP24N30

Function

 

COOLING

COOLING

COOLING

Rated Voltage

 

115V ~

230/208V~

230/208V~

Rated Frequency

 

60Hz

60Hz

60Hz

Total Capacity (Btu/h)

14000

18000/17600

23500/23100

Power Input (W)

 

1430

1850/1810

2740/2710

Rated Input (W)

 

1540

2478

3538

Rated Current (A)

 

15

12.57

18.09

Air Flow Volume (CFM) (H)

458.8

458.8

617.6

Dehumidifying Volume (pints/h)

3.38

4.65

8.46

EER / C.O.P BTU/W.H)

9.8

9.7/9.7

8.6/8.5

Energy Class

 

/

/

/

 

Fan Type-Piece

Centrifugal flow fan – 1

Centrifugal flow fan – 1

Centrifugal flow fan – 1

 

Diameter-Length(inch)

φ7.93 X 4.31

φ7.93 X 4.31

φ8.82 X 4.31

Indoor Side

Evaporator

Aluminum fin-coppertube

Aluminum fin-coppertube

Aluminum fin-coppertube

 

Pipe Diameter (inch)

φ0.276

φ0.276

φ0.276

 

Coil length (l) x height (H) x coil width (L)

16.61 X 15 X 1

16.61 X 15 X 1

16.61 X 15 X 1

 

Compressor Type

ROTARY

ROTARY

ROTARY

 

L.R.A. (A)

58

42

56

 

Compressor RLA(A)

10.9

7.45

11.7/11.0

 

Compressor Power Input(W)

1182

1700

2425/2480

Outdoor Side

Overload Protector

MRA13425-12007

MRA98982-9200

Built in

 

Working Temp Range (ºF)

50º-115º

50º-115º

50º-115º

 

Condenser

Aluminum fin-coppertube

Aluminum fin-coppertube

Aluminum fin-coppertube

 

Fan Type-Piece

Axial fan –1

Axial fan –1

Axial fan –1

 

Fan Diameter (inch)

φ15.59

φ15.59

φ15.59

Fan Motor Speed (rpm) (H/M/L)

900/780/730

900/780/730

1000/900/800

Output of Fan Motor (W)

200

200

190

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)

300

300

300

Permissible Excessive Operating Pressure for the Suction Side (Psig)

150

150

150

Dimension (H/W/D)( inch)

16.85 x 25.98 x 28.46

16.85 x 25.98 x 28.46

16.85 x 25.98 x 29.29

Dimension of Package (H/W/D)( inch)

19.96 x 31.1 x 29.13

19.96 x 31.1 x 29.13

19.69 x 29.29 x 36.22

Net Weight /Gross Weight (Pounds)

150/163

150/163

165/183

Refrigerant Charge (Ounce)

R22/26.46

R22/27.87

R22/33.51

Performance Data

 

EVAP. AIR TEMP.

CONDENSER

 

 

 

 

OPERATING

ELECTRICAL RATINGS

R-22REF.

 

BREAKER

PERFORMANCE

 

DEG. F

Discharge

Suction

Super

 

PRESSURES

 

FUSE

 

 

 

 

 

 

 

 

 

 

TEMPERATURE

Sub-Cooling

 

 

 

 

 

 

Voltage

 

DATA* Cooling

Discharge

Temp.

DEG. F

Temp

Temp

Heat

 

Suction

Discharge

Amps

Amps

Locked

Charge in

 

60 Hertz

 

Air

 

Drop F.

 

 

 

 

 

Cool

Heat

Rotor Amps

OZ.

 

Amps

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CP14N10

59

 

21

118

173

56

41

54

78

267

12.1

/

58

26.5

115

15

CP18N30

58

 

22

119

173

66

52

55

77

269

8.3

/

38.9/42.4

27.9

230

15

57

 

23

119

172

66

52

55

77

269

8.5

/

208

 

 

 

 

 

CP24N30

57

 

23

117

197

60

44

50

75

264

12.3

/

56A(230V)

33.5

230

20

56

 

24

117

195

57

44

50

75

264

13.1

/

208

 

 

 

 

 

*Rating Conditions:

80 degrees F, room air temp. & 50% relative humidity, with 95 degree F, outside air temp & 40% relative humidity.

 

 

 

3

Outer Component Identification

Models: CP14N10, CP18N30, CP24N30

Cabinet

Air inlet louver

Front grille

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Front intake grille

 

 

Air filter

Power cord

(behind front intake grille)

 

 

 

 

 

Control panel cover

4

Installation Dimensions

Models: CP14N10, CP18N30, CP24N30

 

(Top View)

 

 

 

Fence / obstruction

Over 2'

 

 

Over

Over

 

1'

1'

 

 

Wall Or window

 

(Front View)

Ceiling

(Side View)

 

 

25.98"

Over 1'

Over 1'

16.85"

 

 

 

 

Over 2'

 

 

Less than

 

 

8.66"

5

Wiring Diagrams

CP24N30

CP18N30 / CP14N10

6

Functional Component Definitions

MECHANICAL COMPONENTS

Vent door Allows introduction of fresh air into the room and/or exhausts stale room air outside (on select models.)

Plenum assembly Diffuser with directional louvers used to direct the conditioned airflow.

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.

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 supply to the fan motor through the thermostat, which allows for acycle-fanoperation.

Fan Motor Dual-shaftedfan motor operates the indoor blower wheel and the condenser fan blade simultaneously.

Heat anticipator Used to provide better thermostat and room air temperature control.

HERMETIC COMPONENTS

Compressor Motorized device used to compress refrigerant through the sealed system.

Check valve Apressure-operateddevice used to direct the flow of refrigerant to the proper capillary tube, during either the heating or cooling cycle.

Capillary tube A cylindrical meter device used to evenly distribute the flow of refrigerant to the heat exchangers (coils.)

7

Refrigeration System Sequence of Operation

A good understanding of the basic operation of the refrigeration 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:

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 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 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.

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.

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.

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.

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.

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.

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 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 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.

Refrigerant System Components

Suction

Discharge

Line

Line

Evaporator

Condenser

Coil

Coil

 

Compressor

Metering

Refrigerant Drier

Device

Liquid

Refrigerant

Line

Dryer

 

8

Sealed Refrigeration System Repairs

IMPORTANT

ANY SEALED SYSTEM REPAIRS TO COOL-ONLYMODELS 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

1.Voltmeter

2.Ammeter

3.Ohmmeter

4.E.P.A. Approved Refrigerant Recovery System.

5.Vacuum Pump (capable of 200 microns or less vacuum.)

6.Acetylene Welder

7.Electronic Halogen Leak Detector (G.E. Type H-6or equivalent.)

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)

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.

3.Introducing refrigerant charge into high side of the system.

4.Accurately weighing the refrigerant charge actually introduced into the system.

5.Facilities for flowing nitrogen through refrigeration tubing during all brazing processes.

HERMETIC COMPONENT REPLACEMENT

The following procedure applies when replacing components in the sealed refrigeration circuit or repairing refrigerant leaks. (Compressor, condenser, evaporator, capillary tube, refrigerant leaks, etc.)

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%.

2.Cut the process tube below pinch off on the suction side of the compressor.

3.Connect the line from the nitrogen tank to the suction process tube.

HERMETIC COMPONENT REPLACEMENT cont’d

6.Pressurizesystemto30PSIGwithproperrefrigerantandboost refrigerant pressure to 150 PSIG with dry nitrogen.

7.Leak test complete system with electric halogen leak detector, correcting any leaks found.

8.Reduce the system to zero gauge pressure.

9.Connect vacuum pump to high side and low side of system with deep vacuum hoses, or copper tubing. (Do not use regular hoses.)

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.

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.

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.

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.

SPECIAL PROCEDURE IN THE CASE OF COMPRESSOR MOTOR BURNOUT

1.Recover all refrigerant and oil from the system.

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.

4.Reassemble the system, including new drier strainer and capillary tube.

5.Proceed with processing as outlined under hermetic component replacement.

ROTARY COMPRESSOR SPECIAL TROUBLESHOOTING AND SERVICE

4.Drift dry nitrogen through the system and un-solderthe more distant connection first. (Filter drier, high side process tube, etc.)

5.Replace inoperative component, and always install a new filter drier. Drift dry nitrogen through the system when making these connections.

Basically, troubleshooting and servicing rotary compressors is the same as on the reciprocating compressor with only one main exception:

NEVER, under any circumstances, charge a rotary compressor through the LOW side. Doing so would cause permanent damage to the new compressor.

9

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.

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.

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.

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.

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.

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:

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.

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-22refrigerant.

7.Start unit, and verify performance.

8.Crimp the process tube and solder the end shut.

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

Refrigerant Charging

UNDERCHARGED REFRIGERANT SYSTEMS

An undercharged system will result in poor performance (low pressures, etc.) in both the heating and cooling cycle.

Whenever you service a unit with an undercharge of refrigerant, always suspect a leak. The leak must be repaired before charging the unit.

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).

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

low charge, however, frosting and thawing can also be caused by insufficient air over the evaporator.

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.

Gauges connected to system with an undercharge will have low head pressures and substantially low suction pressures.

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 conditions don’t improve, Noncondensables are indicated.

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.

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.

11

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.

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 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.

The following conditions are based primarily on a system in the cooling mode.

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.

With a complete restriction there is no circulation of refrigerant in the system.

Restricted refrigerant systems display the same symptoms as a “low-chargecondition.”

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.

12

Cooling Only Room Air Conditioners: Troubleshooting Tips

Problem

Possible Cause

Action

 

Low voltage

Check voltage at compressor. 115V & 230V units

 

will operate at 10% voltage variance

 

 

 

 

 

 

T-statnot set cold enough or inoperative

Set t-statto coldest position. Testt-stat& replace if

 

inoperative

 

 

 

 

 

 

Compressor hums but cuts off on B10 overload

Hard start compressor. Direct test compressor. If

 

compressor starts, add starting components

Compressor

 

 

 

does not run

Open or shorted compressor windings

Check for continuity & resistance

 

 

 

 

Open overload

Test overload protector & replace if inoperative

 

Open capacitor

Test capacitor & replace if inoperative

 

Inoperative system switch

Test for continuity in all positions. Replace if inop-

 

erative

 

 

 

Broken, loose or incorrect wiring

Refer to appropriate wiring diagrams to check wiring

 

 

 

Problem

Possible Cause

Action

 

Inoperative system switch

Test switch & replace if inoperative

 

Broken, loose or incorrect wiring

Refer to applicable wiring diagram

Fan motor

Open capacitor

Test capacitor & replace if inoperative

does not run

 

 

Fan speed switch open

Test switch & replace if inoperative

 

 

Inoperative fan motor

Test fan motor & replace if inoperative (be sure

 

internal overload has had time to reset)

 

 

Problem

Possible Cause

Action

 

Undersized unit

Refer to industry standard sizing chart

 

T-statopen or inoperative

Set to coldest position. Test t-stat& replace if neces-

 

sary

 

 

 

Dirty filter

Clean as recommended in Owner's Manual

 

Dirty or restricted condenser or evaporator coil

Use pressure wash or biodegradable cleaning agent

Does not cool or

to clean

 

only cools slightly

Poor air circulation

Adjust discharge louvers. Use high fan speed

 

Fresh air or exhaust air door open on applicable

Close doors. Instruct customer on use of this feature

 

models

 

 

 

Low capacity - undercharge

Check for leak & make repair

 

Compressor not pumping properly

Check amperage draw against nameplate. If not

 

conclusive, make pressure test

 

 

13

Cooling Only Room Air Conditioners: Troubleshooting Tips

Problem

 

Possible Cause

Action

 

 

 

Replace fuse, reset breaker. If repeats, check fuse

 

Fuse blown or circuit tripped

or breaker size. Check for shorts in unit wiring &

 

 

 

components

 

 

 

Unit does not run

Power cord not plugged in

Plug it in

System switch in

"OFF" position

Set switch correctly

 

 

Inoperative system switch

Test for continuity in each switch position

 

Loose or disconnected wiring at switch or other

Check wiring & connections. Reconnect per wiring

 

components

 

diagram

Problem

Possible Cause

Action

 

Dirty filter

Clean as recommended in Owner's Manual

 

Restricted airflow

Check for dirty or obstructed coil. Use pressure

 

wash or biodegradable cleaning agent to clean

 

 

Evaporator coil

Inoperative t-stat

Test for shorted t-stator stuck contacts

Short of refrigerant

De-icecoil & check for leak

freezes up

Inoperative fan motor

Test fan motor & replace if inoperative

 

 

 

De-icecoil. Check temp. differential (delta T) across

 

Partially restricted capillary tube

coil. Touch test coil return bends for same temp.

 

 

Test for low running current

 

 

 

Problem

Possible Cause

Action

 

Excessive heat load

Unit undersized. Test cooling performance & replace

 

with larger unit if needed

 

 

 

Restriction in line

Check for partially iced coil & check temperature

 

split across coil

Compressor runs

 

 

Check for oil at silver soldered connections. Check

continually & does not

 

Refrigerant leak

for partially iced coil. Check split across coil. Check

cycle off

 

for low running amperage

 

 

 

 

 

 

T-statcontacts stuck

Check operation of t-stat.Replace if contacts

 

remain closed.

 

 

 

T-statincorrectly wired

Refer to appropriate wiring diagram

Problem

Possible Cause

Action

 

T-statcontacts stuck

Disconnect power to unit. Remove cover of t-stat&

 

check if contacts are stuck. If so, replace t-stat

 

 

T-statdoes not turn

 

 

T-statset at coldest point

Turn to higher temp. setting to see if unit cycles off

unit off

 

 

 

Incorrect wiring

Refer to appropriate wiring diagrams

 

Unit undersized for area to be cooled

Refer to industry standard sizing chart

 

 

 

14

Cooling Only Room Air Conditioners: Troubleshooting Tips

Problem

Possible Cause

Action

 

Overload inoperative. Opens too soon

Check operation of unit. Replace overload if system

 

operation is satisfactory

 

 

 

Compressor restarted before system pressures

Allow a minimum of 2 minutes to allow pressures

 

to equalize before attempting to restart. Instruct

 

equalized

 

customer of waiting period

 

 

 

 

 

 

 

Check voltage with unit operating. Check for

Compressor runs for

Low or fluctuating voltage

other appliances on circuit. Air conditioner should

be in separate circuit for proper voltage & fused

short periods only.

 

 

separately

Cycles on overload

 

 

 

Incorrect wiring

Refer to appropriate wiring diagram

 

 

Shorted or incorrect capacitor

Check by substituting a known good capacitor of

 

correct rating

 

 

 

Restricted or low air flow through condenser coil

Check for proper fan speed or blocked condenser

 

 

 

 

Compressor running abnormally hot

Check for kinked discharge line or restricted

 

condenser. Check amperage

 

 

Problem

Possible Cause

Action

 

Loss of charge in t-statbulb

Place jumper across t-statterminals to check if unit

T-statdoes not

operates. If unit operates, replace t-stat.

 

turn unit on

Loose or broken parts in t-stat

Check as above

 

Incorrect wiring

Refer to appropriate wiring diagram

Problem

Possible Cause

Action

 

Poorly installed

Refer to Installation Manual for proper installation

 

 

 

 

Fan blade striking chassis

Reposition - adjust motor mount

Noisy operation

 

Check that compressor grommets have not

Compressor vibrating

deteriorated. Check that compressor mounting parts

 

 

 

are not missing

 

 

 

 

Improperly mounted or loose cabinet parts

Check assembly & parts for looseness, rubbing &

 

rattling

 

 

Problem

Possible Cause

Action

 

Evaporator drain pan overflowing

Clean obstructed drain trough

 

Condensation forming on base pan

Evaporator drain pan broken or cracked. Reseal or

 

replace

 

 

Water leaks into the

Poor installation resulting in rain entering the room

Check installation instructions. Reseal as required

 

 

room

Condensation on discharge grille louvers

Clean the dirty evaporator coil. Use pressure wash

 

or biodegradable cleaning agent to clean

 

 

 

Chassis gasket not installed

Install gasket, per Installation manual

 

Downward slope of unit is too steep

Refer to installation manual for proper installation

 

 

 

15

Cooling Only Room Air Conditioners: Troubleshooting Tips

Problem

 

Possible Cause

Action

 

Sublimation:

When

Ensure that foam gaskets are installed in between

 

window panes & in between the unit & the sleeve.

 

unconditioned saturated, outside air mixes with

 

Also, ensure that fresh air/exhaust vents (on

 

conditioned air, condensation forms on the cooler

 

applicable models) are in the closed position & are

 

surfaces

 

Water "spitting"

 

in tact

 

 

 

 

 

into room

 

 

Follow installation instructions to ensure that

 

Downward pitch of installation is too steep

downward pitch of installed unit is no less than 1/4"

 

 

 

& no more than 3/8"

 

 

 

 

 

Restricted coil or dirty filter

Clean & advise customer of periodic cleaning &

 

maintenance needs of entire unit

 

 

 

Problem

Possible Cause

Action

 

Insufficient air circulation thru area to be air

Adjust louvers for best possible air circulation

 

conditioned

 

 

Excessive moisture

Oversized unit

Operate in "MoneySaver" position

 

Inadequate vapor barrier in building structure,

Advise customer

 

particularly floors

 

 

Problem

Possible Cause

Action

 

T-statdifferential too narrow

Replace t-stat

 

Plenum gasket not sealing, allowing discharge air to

Check gasket. Reposition or replace as needed

T-statshort cycles

short cycle t-stat

 

 

Restricted coil or dirty filter

Clean & advise customer of periodic cleaning &

 

maintenance needs of entire unit

 

 

Problem

Possible Cause

Action

 

Anticipator (resistor) wire disconnected at t-stator

Refer to appropriate wiring diagram

 

system switch

 

 

 

 

 

Prolonged off cycles

 

Disconnect plus from outlet. Remove resistor from

 

bracket. Insert plug & depress "COOL" & "FAN

(automatic operation)

Anticipator (resistor) shorted or open

AUTOMATIC" buttons. Place t-statto warmest

 

 

setting. Feel resistor for temperature. If no heat,

 

 

replace resistor

 

 

 

 

Partial loss of charge in t-statbulb causing a wide

Replace t-stat

 

differential

 

 

Problem

Possible Cause

Action

 

Evaporator drain pan cracked or obstructed

Repair, clean or replace as required

 

 

 

 

Water in compressor area

Detach shroud from pan & coil. Clean & remove old

 

sealer. Reseal, reinstall & check

Outside water leaks

 

Obstructed condenser coil

Use pressure wash or biodegradable cleaning agent

 

 

to clean

 

 

 

Fan blade/slinger ring improperly positioned

Adjust fan blade to 1/2" of condenser coil

 

 

 

16

Heat / Cool Room Air Conditioners: Troubleshooting Tips

Problem

Possible Cause

Action

 

Heat anticipator (resistor) shorted (on applicable

Disconnect power to unit. Remove resistor from t-

 

stat bulb block. Plus in unit & allow to operate. Feel

 

models)

 

resistor for heat. If not heat, replace resistor

Room temperature

 

 

 

uneven

Wide differential - partial loss of t-statbulb charge

Replace t-stat& check

(Heating cycle)

 

 

 

 

 

 

Incorrect wiring

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

Check for voltage at "TM" & "TM1" on timer. If no

 

(applicable models)

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

Unit will not defrost

 

control

 

 

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

Reinstall & be assured that good bulb to coil contact

 

good coil contact

is made

Problem

Possible Cause

Action

 

Exhaust or fresh air door open

Check if operating properly. Instruct customer on

 

proper use of control

 

 

 

Dirty filter

Clean as recommended in Owner's Manual

 

 

Check heat rise across coil. If unit operates

 

Unit undersized

efficiently, check if insulation can be added to attic

 

or walls. If insulation is adequate, recommend

 

 

Does not heat

 

additional unit or larger one

 

 

adequately

Outdoor t-statopen (applicable models)

T-statshould close at 38°F. Check continuity of

 

 

control. If temperature is below 38°F, replace control

 

 

 

 

 

 

Heater hi-limitcontrol cycling on & off

Check for adequate fan air across heater. Check

 

control for open at 160°F & close at 150°F

 

 

 

Shorted supplementary heater

Ohmmeter check, approx. 32-35ohms

 

Incorrect wiring

Check applicable wiring diagram

17

Heat / Cool Room Air Conditioners: Troubleshooting Tips

Problem

Possible Cause

Action

 

Incorrect wiring

Refer to applicable wiring diagram

 

Defective solenoid coil

Check for continuity of coil

Unit cools when heat

 

Block condenser coil & switch unit to cooling. Allow

is called for

Reversing valve fails to shift

pressure to build up in system, then switch to

 

 

heating. If valve fails to shift, replace valve.

 

 

 

 

Inoperative system switch

Check for continuity of system switch

Problem

Possible Cause

Action

 

Heating capillary tube partially restricted

Check for partially starved outer coil. Replace

 

heating capillary tube

 

 

Cooling adequate,

 

Switch unit several times from heating to cooling.

Check valve leaking internally

Check temperature rise across coil. Refer to

but heating

 

specification sheet for correct temperature rise

insufficient

 

 

 

 

 

 

 

Reversing valve failing to shift completely;

De-energizesolenoid coil, raise head pressure,

 

energize solenoid to break loose. If valve fails to

 

bypassing hot gas

 

make complete shift, replace valve.

 

 

 

 

 

18

Components

Model CP14N10

19

Model CP14N10

No

Description

Qty

Friedrich Part#

Code

 

 

 

 

 

1

Supporter Assy

1

67700200

 

2

Screw ST4.2X13

7

67700154

 

3

Window locking bracket

2

67700113

 

4

Screw 4X20

6

67700151

 

5

Seal strip 1

1

67700128

 

6

Seal strip 2

1

67700129

 

7

Curtain Assemby Left and Right

1

67700201

 

8

Right Curtain

1

67700202

 

9

Left Curtain

1

67700203

 

10

Cabinet Assy

1

67700204

 

11

Screw ST4.2X6.5

6

67700155

 

12

Screw M4X8

1

67700149

 

13

Connect cord

1

67700170

 

14

Screw M4X5

1

67700205

 

15

Washer 4

1

67700158

 

16

Screw ST4.2X22

4

67700153

 

17

Top Rail Assy

1

67700206

 

18

Screw ST4X10

4

67700152

 

19

Condenser Assy

1

67700207

 

20

Nut with Washer M10

1

67700157

 

21

Washer 10

1

67700159

 

22

Fan Blade

1

67700117

 

23

Shroud, Fan Blade

1

67700208

 

24

Top Cover

1

67700110

 

25

Motor Support

1

67700112

 

26

Motor CJ100U

1

67700209

 

27

Innerwall

1

67700109

 

28

Shroud

1

67700127

 

29

Air Outlet Foam

1

67700130

 

30

Swing Louver

2

67700210

 

31

Swing Linkage

2

67700124

 

32

Motor, Swing Louver

1

67700211

 

33

Inflectional Axis

1

67700121

 

34

Swing Support

1

67700125

 

35

Fresh Air Door

1

67700212

 

36

Blower Wheel

1

67700116

 

20

Model CP14N10

No

Description

Qty

Friedrich Part#

Code

37

Clapboard of Snail Shell

1

67700108

 

38

Base Plate of Air Flue

1

67700106

 

39

Evaporator Assy

1

67700103

 

40

Sensor Holder

1

67700213

 

41

Compressor 44B124HXCEF

1

67700214

 

42

Overload Protector

1

67700215

 

43

Compressor Gasket

3

67700216

 

44

Nut with washer M8

3

67700156

 

45

Capillary Assy

1

67700217

 

46

Water Tray

1

67700131

 

47

Capacitor 15uF/300VAC

1

67700218

 

48

Capacitor 50uF/450V

1

67700219

 

49

Relay 841-S-1A-D110/120V

1

67700220

 

50

Transformer 41X26.5C

1

67700221

 

51

Capacitor clamp

1

67700114

 

52

Main PCB M2A91J

1

67700222

 

53

Electric box

1

67700136

 

54

Isolation Washer D

1

67700223

 

55

Wire Clamp

1

67700160

 

56

Power cord

1

67700224

 

57

Receiver Cover

1

67700225

 

58

Membrane

1

67700226

 

59

Control Panel Cover A

1

67700227

 

60

Display Board 2A91J

1

67700228

 

61

Front Panel Assy

1

67700229

 

62

Guide Louver Linkage

1

67700230

 

63

Filter

1

67700231

 

64

Guide Louver

14

67700232

 

65

Front Case

1

67700233

 

66

Front Panel

1

67700234

 

67

AS Window

1

67700235

 

68

Remote Cover

1

67700236

 

69

Chassis

1

67700237

 

70

Chassis Fixer

1

67700105

 

71

Remote Control

1

67700171

 

21

Models CP18C30 & CP18N30

No

Description

Qty

Friedrich Part#

Code

1

Supporter Assy

1

67700132

 

2

Self-threadingScrew ST4.2x22

7

67700154

 

3

Window Locking Bracket

2

67700113

 

4

Screw 4X20

6

67700151

 

5

Seal Strip 1

1

67700128

 

6

Seal Strip 2

1

67700129

 

7

Curtain Assemby Left and Right

1

67700166

 

8

Right Curtain

1

67700168

 

9

Left Curtain

1

67700167

 

10

Cabinet Assy

1

67700111

 

11

Self-threadingScrew ST4.2X6.5

6

67700155

 

12

Screw Assay M4x8

1

67700149

 

13

Connect Cord

1

67700170

 

14

Screw M4X6

1

67700150

 

15

Washer 4

1

67700158

 

16

Self-threadingScrew ST4.2x22

6

67700153

 

17

Top Rail

1

67700134

 

18

Self-threadingScrew with Gasket ST4X10

4

67700152

 

19

Condenser Assy

1

67700104

 

20

Nut with Washer M10

1

67700157

 

21

Washer 6

1

67700159

 

22

Fan Blade

1

67700117

 

23

Shroud, Fan Blade

1

67700107

 

24

Upper Clapboard

1

67700110

 

25

Motor Support

1

67700112

 

26

Motor CJ100B

1

67700164

 

27

Innerwall

1

67700109

 

28

Blower Front

1

67700127

 

29

Air Outlet Foam 1

1

67700130

 

30

Swing Louver

2

67700120

 

31

Lever of Vertical Guider

2

67700124

 

32

Swing Motor SM020B

1

67700133

 

33

Inflectional Axis

1

67700121

 

34

Cross Beam

1

67700125

 

35

Fresh Air Door

1

67700123

 

22

Models CP18C30 & CP18N30

No

Description

Qty

Friedrich Part#

Code

36

Blower Wheel

1

67700116

 

37

Front Clapboard of Snail Shell

1

67700108

 

38

Base Plate of Air Flue

1

67700106

 

39

Evaporator Assy

1

67700103

 

40

Insert Block

2

67700141

 

41

Compressor 2K25S236AHF

1

67700101

 

42

Overload Protector

1

67700102

 

43

Compressor Gasket AD7070815

3

67700161

 

44

Nut with Washer M8

3

67700156

 

45

Capillary Assay

1

67700115

 

46

Water Tray

1

67700131

 

47

Capacitor 7uF/450V

1

67700145

 

48

Capacitor CBB65 40uF/450V(TUV)

1

67700144

 

49

Relay 841-S-1A-D200V/240V TUV

1

67700147

 

50

Power Transformer 41X26.5F

1

67700146

 

51

Capacitor Clamp

1

67700114

 

52

Electric box

1

67700136

 

53

Main PCB J25713J

1

67700142

 

54

Fixed Clamp

1

67700160

 

55

Power cord

1

67700169

 

56

Display Board J25713J

1

67700143

 

57

Receiver Cover

1

67700138

 

58

Control Panel Cover

1

67700137

 

59

Touch Pad Plate

1

67700148

 

60

Front Panel Assy

1

67700165

 

61

Guide louver linkage

1

67700122

 

62

Filter

1

67700163

 

63

Horizontal air guider1

8

67700118

 

64

Horizontal air guider2

1

67700119

 

65

Up Filter Guide

1

67700140

 

66

Down Filter Guide

1

67700139

 

67

Panel

1

67700135

 

68

Basepan

1

67700126

 

69

Chassis Fixer

1

67700105

 

70

Drain Plug

1

67700162

 

71

Remote Control

1

67700171

 

23

Components

Model CP24N30

24

Model CP24N30

No

Description

Qty

Friedrich Part#

Code

1

Supporter Assy

1

67700200

 

2

Screw ST4.2X13

7

67700154

 

3

Window locking bracket

2

67700113

 

4

Screw 4X20

6

67700151

 

5

Seal strip 1

1

67700128

 

6

Seal strip 2

1

67700129

 

7

LT & RT Curtain Assembly

1

67700201

 

8

Right Curtain

1

67700202

 

9

Left Curtain

1

67700203

 

10

Cabinet Assy

1

67700238

 

11

Screw ST4.2X6.5

6

67700155

 

12

Screw M4X8

1

67700149

 

13

Connect cord

1

67700170

 

14

Screw M4X5

1

67700205

 

15

Washer 4

1

67700158

 

16

Screw ST4.2X22

4

67700153

 

17

Top Rail Assy

1

67700206

 

18

Screw ST4X10

4

67700152

 

19

Condenser Assy

1

67700239

 

20

Nut with Washer M10

1

67700157

 

21

Washer 10

1

67700159

 

22

Fan Blade

1

67700117

 

23

Shroud, Fan Blade

1

67700208

 

24

Top Cover

1

67700240

 

25

Motor Support

1

67700112

 

26

Motor CJ100U

1

67700241

 

27

Innerwall

1

67700109

 

28

Shroud

1

67700242

 

29

Air Outlet Foam

1

67700130

 

30

Swing Louver

2

67700210

 

31

Swing Linkage

2

67700124

 

32

Motor, Swing Louver

1

67700133

 

33

Inflectional Axis

1

67700121

 

34

Swing Support

1

67700125

 

35

Fresh Air Door

1

67700212

 

36

Blower Wheel

1

67700243

 

37

Blower Front

1

67700108

 

25

Model CP24N30

No

Description

Qty

Friedrich Part#

Code

 

 

 

 

 

38

Base Plate of Air Flue

1

67700106

 

39

Evaporator Assy

1

67700103

 

40

Sensor Holder

1

67700213

 

41

Compressor 44B124HXCEF

1

67700244

 

42

Overload Protector

1

67700215

 

43

Compressor Gasket

3

67700216

 

44

Nut with washer M8

3

67700156

 

45

Capillary Assy

1

67700245

 

46

Water Tray

1

67700131

 

47

Capacitor 15uF/300VAC

1

67700145

 

48

Capacitor 50uF/450V

1

67700246

 

49

Relay 841-S-1A-D110/120V

1

67700147

 

50

Transformer 41X26.5C

1

67700247

 

51

Capacitor clamp

1

67700114

 

52

Main PCB M2A91J

1

67700248

 

53

Electric box

1

67700136

 

54

Isolation Washer D

1

67700223

 

55

Wire Clamp

1

67700160

 

56

Power cord

1

67700249

 

57

Receiver Cover

1

67700225

 

58

Touch Pad Plate

1

67700226

 

59

Control Panel Cover A

1

67700227

 

60

Display Board 2A91J

1

67700228

 

61

Front Panel Assy

1

67700229

 

62

Guide Louver Linkage

1

67700230

 

63

Filter

1

67700231

 

64

Guide Louver

14

67700232

 

65

Front Case

1

67700233

 

66

Front Panel

1

67700234

 

67

AS Window

1

67700235

 

68

Remote Cover

1

67700236

 

69

Basepan

1

67700250

 

70

Chassis Fixer

1

67700105

 

71

Remote Control

1

67700171

 

26

Friedrich Air Conditioning Company

P.O. Box 1540

San Antonio, TX 78295

210.357.4400

www.friedrich.com

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 Organizationin 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

 

www.friedrich.com

CP-14-18-24-Svc-Prts-07(3-07)

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

www.friedrich.com

Printed in the U.S.A.

CP-14-18-24-Svc-Prts-07(3-07)