Friedrich CP14-18-24 CP14N10, CP14-18-24 CP18N30, CP14-18-24 CP24N30, CP14N10, CP18N30 Service And Parts Manual

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Service & P arts 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 Identiﬁ cation ................................................................................................................................................... 4

Installation Dimensions ................................................................................................................................................................5

Wiring Diagrams ...........................................................................................................................................................................6

Functional Component Deﬁ nitions ...............................................................................................................................................7

Refrigeration System Sequence of Operation ............................................................................................................................8

Sealed Refrigeration System Repairs ....................................................................................................................................9-12

T roubleshooting .....................................................................................................................................................................13-18

Part Diagrams and Part Lists ................................................................................................................................................19-23

Warranty ..................................................................................................................................................................................... 24

The information contained in t his manual is intended for use by a qualiﬁ ed ser vice technician who is familiar

with the safety procedures required i n in stal la tion a nd repair, and who is equipped with the proper tools and test instruments.

Installation or repairs made by unqualiﬁ ed persons can result in hazards subjecting the unqualiﬁ ed person making such repai rs 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 injur y or proper t y damage which may result to you or others. Friedrich Air Conditioning Co mpany will not be responsible for any injury or property damage arising from improper installation, service, and/or service procedures.

Speciﬁ cations 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 ﬂ ow fan – 1 Centrifugal ﬂ ow fan – 1 Centrifugal ﬂ ow fan – 1

Diameter-Length (inch) φ7.93 X 4.31 φ7.93 X 4.31 φ8.82 X 4.31

Indoor Side

Outdoor Side

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

Evaporator Aluminum ﬁ n-copper tube Aluminum ﬁ n-copper tube Aluminum ﬁ n-copper tube

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

Overload Protector MRA13425-12007 MRA98982-9200 Built in

Working Temp Range (ºF) 50º-115º 50º-115º 50º-115º

Condenser Aluminum ﬁ n-copper tube Aluminum ﬁ n-copper tube Aluminum ﬁ n-copper tube

Fan Type-Piece Axial fan –1 Axial fan –1 Axial fan –1

Fan Diameter (inch) φ15.59 φ15.59 φ15.59

Performance Data

EVAP. AIR TEMP.

PERFORMANCE

DATA * Cooling

CP14N10

CP18N30

CP24N30

DEG. F

Discharge

Air

59 21 118 173 56 41 54 78 267 12.1 / 58 26.5 115 15 58 22 119 173 66 52 55 77 269 8.3 / 57 23 119 172 66 52 55 77 269 8.5 / 208 57 23 117 197 60 44 50 75 264 12.3 / 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.

Temp.

Drop F.

CONDENSER

TEMPERATURE

DEG. F

Discharge

Temp

Suction

Temp

Super

Heat

Sub-Cooling

OPERATING PRESSURES

Suction Discharge

ELECTRICAL RATING S R-22 REF.

Amps

Cool

Heat

Locked

Rotor Amps

38.9/42.4 27.9

56A(230V) 33.5

Charge in

OZ.

Voltage

230

BREAKER

FUSE

60 Hertz

Amps

Outer Component Identiﬁ cati o n

Models: CP14N10, CP18N30, CP24N30

Front intake grille

Cabinet

Air inlet louver

Front grille

Air filter (behind front intake grille)

Power cord

Control panel cover

Installation Dimensions

Models: CP14N10, CP18N30, CP24N30

(Top View)

Over 2'

Fence / obstruction

16.85"

Over 1'

(Front View)

25.98"

Over 1'

Wall Or window

Ceiling

Over 1'

(Side View)

Over 1'

Over 2'

Less than

8.66"

Wiring Diagrams

CP24N30

CP18N30 / CP14N10

Functional Component Deﬁ nitions

MECHANICAL C OMPONEN TS

Vent d o o r 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 airﬂ ow. 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 t he base pan and onto the condenser coil, thus lowering the temperature and pressures within the coil.

ELECTRICAL COMPONENTS

Thermostat Used to maintain the speciﬁ ed 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 W hen engaged, it sends the power sup ply to the fan motor through t he thermost at, which allows for a cycle-fan operation.

Fan Motor Dual- shaf ted fan motor operate s 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 A pressure-operated device used to direct the ﬂ ow

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 ﬂ ow of refrigerant to the heat exchangers (coils.)

Refrigeration System Sequence of Operation

A good understanding of t he basic operation of the refrigera tion system is essential for the s ervic e technician. Without t his understanding, accurate troubleshooting of refrigeration system problems will be more difﬁ cult and time consuming, if not (in some cases) entirely impossible. The re frigeration system uses four basic principles (laws) in its operation they are as follows:

1. “Heat always ﬂ ows 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 w hich a liquid or gas c hanges state is dependent upon the pressure.”

The refrigerat ion cycle begins at the compre ssor. Starting the

compressor creates a low pressure in the suction line which draws refrigerant gas (vapor) into the compressor. The compressor then

“compresse s” this refrigerant, raising it s pressure and its (heat

intensity) T emperature.

The refrigerant leaves the compressor through the discharge line

as a hot high pressure gas (vapor). The refrigerant enter s the condenser coil where it gives up some of its heat. The condenser fan moving air across the coil’s ﬁ nned surface facilitates the transfer of heat from the refrigerant to the relatively cooler outdoor air.

When a sufﬁ cient quantity of heat has be en 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 ﬂ ow across the condenser 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 co il is under a lower p res sure (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 ﬁ nned 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 ﬂ ow 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 compre ssor caus es

the refrigerant to le ave the evaporator through t he suctio n line as a cool low pressure vapor . The refrigerant then returns to the compressor, where the cycle is repeated.

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 plac e. In all cas es, 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 nex t enters the metering device. The

metering device is a capillary tube. The purpose of the metering device is to “meter ” (i.e. control or me asure) th e quantity of refrigerant entering the evaporator coil.

Suction Line

Evaporator Coil

Metering Device

Refrigerant Dryer

Discharge Line

Condenser Coil

Compressor

Refrigerant Drier

Liquid

Line

Sealed Refrigeration System Repairs

IMPORTANT

ANY SEALED SYSTEM REPAIRS TO COOL -ONLY MODELS REQUIRE THE INST ALLATION 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. V acuum Pump ( capable of 200 microns or less vacuum. )

6. Acetylene Welder

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

1 0. 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 ﬂ owing nitrogen throu gh refriger ation tubing during all brazing processes.

HERMETIC COMPONENT REP LAC EMEN T

The following proc edure applies when replacing component s in the sealed refrig eration circuit or repairing ref rigerant leaks. (Compressor, condenser, evaporator, capillary tub e, refrigerant

leaks, etc.)

1. Recover the refr igerant from the system at the proc ess tube located on the high side of the system by installing a line tap on the proc ess tube. App ly gauge from pr ocess tube to EP A ap pro v ed gauges from process tube to E PA 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 nitr ogen tank to the suction process tube.

4. Dr ift dry ni trogen through the system and un- solder the more distant connection ﬁ rst. (Filter drier, high side process tube, etc.)

5. Replace inoperative component, and always install a new ﬁ lter drier. Drift dr y nitrogen through the system when making these connections.

HERMETIC COMPONENT REP LAC EMEN T cont’d

6. Pressurize system to 30 PSIG with proper refrigerant and boost refrigerant pressure to 1 50 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 c op per tubin g. (Do n ot use regular hoses.)

1 0. Evacuate system to maximum absolute holding pressure

of 200 micro ns or less. NOTE: This process c an 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 speciﬁ ed. This will prevent boiling the oil out of the crankcas e, 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 PROCE DURE IN THE CASE OF COM PRESSOR MOTOR BURNOUT

1. Recover all refrigerant and oil from the system.

2. Remove compressor, capillary tube and ﬁ lter drier from the system.

3. Flush evaporator condenser and all connecting tubing with dry nitro gen 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 drie r str ainer and capil l a ry t u b e .

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

ROTA RY COMPRESSOR SPECIAL TROUBLESHOOTING AND SERVICE

Basically, troubleshooting and ser vicing rotary c ompressors 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.

Refrigerant Charging

NOTE: BECAUSE THE R AC SYSTEM IS A SEA LED SYSTEM, SERVICE PROC ESS TUBES WILL H AVE TO BE INSTALLED. FIRST INSTALL A LINE TAP AND REMOV E REFRIGERA NT FROM SYSTEM. MAKE NECESSARY SEALED SYSTEM REPAIRS AND VACUUM SYSTEM. CRIMP PRO CESS TUB E LINE AND SOLDER END SHUT. DO NOT LEAVE A SERVICE VAL VE 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 performanc e (capacity) and/or efﬁ ciency. Accordingly, the use of proper charging meth ods during ser vicing 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 sourc e of cert ain compress or failures if they remain uncorrec ted for any period of time. Quite of ten, other problems (such as low air ﬂ ow across ev aporator , 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 c ompr essor eventually c ausing a mechanical failure within the compressor. This mechanical failure can manifest itself as valve failure, bearing failure, and/or other mechanical failure. The speciﬁ c type of failure will be inﬂ uenced 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 sufﬁ cient cooling for the compressor motor. When this occurs, the m otor w in ding temp er ature w ill inc r eas e c ausin g the motor to overheat and possibl y cycle open the compres sor overload protector. Continued overheating of the moto r win dings and/or cycling of the overload will eventually lead to compressor motor or overload failure.

METHOD OF CHAR GIN G

The acceptabl e method for charging the RAC system is the

Weighed in Charge Method. The weighed in c harge 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, compress or replacement, or when there is no refrigerant charge left in th e unit.

To charge by this method, requires the following steps:

1. Inst all 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 pr opert y quantity of R-22 refrigerant.

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 ﬁ ttings to the process tubes on the discharge and suction of the compress or. Proper refrigerant recovery procedures need to be adhered to as outlined in EPA Regulations. THIS SHOULD ONL Y BE ATTEMPTED BY QUALIFIED SERVICE PERSONNEL.

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 servic e a unit with an under charge 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 work in g pr essures in the system (1 5 to 20 minutes ).

During the co oling c ycle you c an listen c aref ully at the exit of t he metering device into the evaporato r; an intermittent hissing an d gurgling sound indicates a l ow refrigerant charge. Intermit tent frosting and thawing of the evaporator is another indication of a

NOTE: Heat pump refrigeration drawing

low charge, however, frosting and thawing can also be caused by insufﬁ cient 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 c harge. A check of t he amper age drawn by the compressor m otor should show a l ower reading. (Check the Uni t Speciﬁ cation.) After the unit has run 10 to 15 minutes, check the gauge pressures.

Gauges connec ted to system with an under charge will have low head pressures and substantially low suction pressures.

OVERCHARGED REFRIGERANT SYSTEMS

Compressor amps will be near normal or higher . Noncondensables can also cause these symptoms. T o conﬁ rm, remove some of the charge, if conditions improve, system may be overcharged. If condi-

tions don’t improve, Noncondensables are indicated.

Whenever an overcharged system is indi cated, always make sure

that the problem is not c aused by air ﬂ ow problems. Improper air ﬂ ow over the evaporator coil may indicate some of the same symptoms as an overcharged system.

An over charge can caus e the com press or to fail, since it wo uld 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 evapora tor w ill not be encountered because the refriger ant 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 .

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 par tial 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 par tial restriction of any t ype can be found by feel, as there is a temperature dif ferenc e from one side of t he restr ict ion to the other.

With a complete restriction, there will be no sound at the metering device entrance. An amp erage check of the co mpressor with a partial restriction may show normal current when compared to the unit speciﬁ cation. 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 condit ions are based primar ily on a system in the coolin g m od e.

Troubleshooti ng a restricte d refrigeran t system can be difﬁ cult. The fo llowing proce dures ar e the more comm on proble ms and solution s to these prob lems. There a re two type s of refrigera nt restrict ions: Partial r estricti ons 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-charge condition.”

• When the unit is shut off, the gauges may equal ize ver y slowly.

• Gauges connected to a completely re stricted system will run in a deep vacuum. When the unit is shut off, the gauges will not equalize at all.

Cooling Only Room Air Conditioners: Troubleshooting Tips

Problem Possible Cause Action

Low voltage

T-stat not set cold enough or inoperative

Compressor hums but cuts off on B10 overload

Compressor does not run

Problem Possible Cause Action

Fan motor

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

Broken, loose or incorrect wiring Refer to appropriate wiring diagrams to check wiring

Inoperative system switch Test switch & replace if inoperative Broken, loose or incorrect wiring Refer to applicable wiring diagram Open capacitor Test capacitor & replace if inoperative Fan speed switch open Test switch & replace if inoperative

Inoperative fan motor

Check voltage at compressor. 115V & 230V units will operate at 10% voltage variance

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

Hard start compressor. Direct test compressor. If compressor starts, add starting components

Test for continuity in all positions. Replace if inoperative

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

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

Use pressure wash or biodegradable cleaning agent to clean

Close doors. Instruct customer on use of this feature

Check amperage draw against nameplate. If not conclusive, make pressure test

Does not cool or

only cools slightly

T-stat open or inoperative Dirty ﬁ lter Clean as recommended in Owner's Manual Dirty or restricted condenser or evaporator coil Poor air circulation Adjust discharge louvers. Use high fan speed

Fresh air or exhaust air door open on applicable models

Low capacity - undercharge Check for leak & make repair Compressor not pumping properly

Cooling Only Room Air Conditioners: Troubleshooting Tips

Problem Possible Cause Action

Replace fuse, reset breaker. If repeats, check fuse

Fuse blown or circuit tripped

Unit does not run

Problem Possible Cause Action

Evaporator coil

freezes up

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

components

Dirty ﬁ lter Clean as recommended in Owner's Manual Restricted airﬂ ow Inoperative t-stat Test for shorted t-stat or stuck contacts

Short of refrigerant De-ice coil & check for leak Inoperative fan motor Test fan motor & replace if inoperative

Partially restricted capillary tube

or breaker size. Check for shorts in unit wiring & components

Check wiring & connections. Reconnect per wiring diagram

Check for dirty or obstructed coil. Use pressure wash or biodegradable cleaning agent to clean

De-ice coil. Check temp. differential (delta T) across coil. Touch test coil return bends for same temp. Test for low running current

Problem Possible Cause Action

Excessive heat load

Restriction in line

Compressor runs

continually & does not

cycle off

Problem Possible Cause Action

T-stat does not turn

unit off

Refrigerant leak

T-stat contacts stuck T-stat incorrectly wired Refer to appropriate wiring diagram

T-stat contacts stuck

T-stat set at coldest point Turn to higher temp. setting to see if unit cycles off Incorrect wiring Refer to appropriate wiring diagrams Unit undersized for area to be cooled Refer to industry standard sizing chart

Unit undersized. Test cooling performance & replace with larger unit if needed

Check for partially iced coil & check temperature split across coil

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.

Disconnect power to unit. Remove cover of t-stat & check if contacts are stuck. If so, replace t-stat

Cooling Only Room Air Conditioners: Troubleshooting Tips

Problem Possible Cause Action

Check operation of unit. Replace overload if system operation is satisfactory

Allow a minimum of 2 minutes to allow pressures to equalize before attempting to restart. Instruct customer of waiting period

Check voltage with unit operating. Check for other appliances on circuit. Air conditioner should be in separate circuit for proper voltage & fused separately

Check by substituting a known good capacitor of correct rating

Compressor runs for

short periods only .

Cycles on overload

Overload inoperative. Opens too soon

Compressor restarted before system pressures equalized

Low or ﬂ uctuating voltage

Incorrect wiring Refer to appropriate wiring diagram Shorted or incorrect capacitor

Restricted or low air ﬂ ow through condenser coil Check for proper fan speed or blocked condenser

Compressor running abnormally hot

Problem Possible Cause Action

T-stat does not

turn unit on

Problem Possible Cause Action

Noisy operation

Problem Possible Cause Action

Loss of charge in t-stat bulb Loose or broken parts in t-stat Check as above

Incorrect wiring Refer to appropriate wiring diagram

Poorly installed Refer to Installation Manual for proper installation Fan blade striking chassis Reposition - adjust motor mount

Compressor vibrating

Improperly mounted or loose cabinet parts

Evaporator drain pan overﬂ owing Clean obstructed drain trough Condensation forming on base pan

Check for kinked discharge line or restricted condenser. Check amperage

Place jumper across t-stat terminals to check if unit operates. If unit operates, replace t-stat.

Check that compressor grommets have not deteriorated. Check that compressor mounting parts are not missing

Check assembly & parts for looseness, rubbing & rattling

Evaporator drain pan broken or cracked. Reseal or replace

Water leaks into the

room

Poor installation resulting in rain entering the room Check installation instructions. Reseal as required

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

Clean the dirty evaporator coil. Use pressure wash or biodegradable cleaning agent to clean

Cooling Only Room Air Conditioners: Troubleshooting Tips

Problem Possible Cause Action

Sublimation: When unconditioned saturated, outside air mixes with conditioned air, condensation forms on the cooler

Water "spitting"

into room

Problem Possible Cause Action

Excessive moisture

Problem Possible Cause Action

T-stat short cycles

surfaces

Downward pitch of installation is too steep

Restricted coil or dirty ﬁ lter

Insufﬁ cient air circulation thru area to be air conditioned

Oversized unit Operate in "MoneySaver" position Inadequate vapor barrier in building structure,

particularly ﬂ oors

T-stat differential too narrow Replace t-stat Plenum gasket not sealing, allowing discharge air to

short cycle t-stat Restricted coil or dirty ﬁ lter

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

Follow installation instructions to ensure that downward pitch of installed unit is no less than 1/4" & no more than 3/8"

Clean & advise customer of periodic cleaning & maintenance needs of entire unit

Adjust louvers for best possible air circulation

Advise customer

Check gasket. Reposition or replace as needed Clean & advise customer of periodic cleaning &

maintenance needs of entire unit

Problem Possible Cause Action

Anticipator (resistor) wire disconnected at t-stat or system switch

Prolonged off cycles

(automatic operation)

Problem Possible Cause Action

Outside water leaks

Anticipator (resistor) shorted or open

Partial loss of charge in t-stat bulb causing a wide differential

Evaporator drain pan cracked or obstructed Repair, clean or replace as required

Water in compressor area

Obstructed condenser coil

Fan blade/slinger ring improperly positioned Adjust fan blade to 1/2" of condenser coil

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

Replace t-stat

Detach shroud from pan & coil. Clean & remove old sealer. Reseal, reinstall & check

Use pressure wash or biodegradable cleaning agent to clean

Heat / Cool Room Air Conditioners: Troubleshooting Tips

Problem Possible Cause Action

Heat anticipator (resistor) shorted (on applicable models)

Room temperature

uneven

(Heating cycle)

Problem Possible Cause Action

Unit will not defrost

Wide differential - partial loss of t-stat bulb charge Replace t-stat & check

Incorrect wiring

Incorrect wiring Refer to appropriate wiring diagram Defrost control timer motor not advancing

(applicable models)

Defrost control out of calibration (applicable models)

Defrost control contacts stuck

Defrost control bulb removed from or not making good coil contact

Disconnect power to unit. Remove resistor from tstat bulb block. Plus in unit & allow to operate. Feel resistor for heat. If not heat, replace resistor

Refer to appropriate wiring diagram. Resistor is energized during "ON" cycle of compressor or fan.

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

If outside coil temperature is 25F or below, & preselected time limit has elapsed, replace defrost control

If contacts remain closed between terminals "2" & "3" of the defrost control after preselected time interval has passed, replace control

Reinstall & be assured that good bulb to coil contact is made

Problem Possible Cause Action

Exhaust or fresh air door open Dirty ﬁ lter Clean as recommended in Owner's Manual

Unit undersized

Does not heat

adequately

Outdoor t-stat open (applicable models)

Heater hi-limit control cycling on & off Shorted supplementary heater Ohmmeter check, approx. 32-35 ohms

Incorrect wiring Check applicable wiring diagram

Check if operating properly . Instruct customer on proper use of control

Check heat rise across coil. If unit operates efﬁ ciently, check if insulation can be added to attic or walls. If insulation is adequate, recommend additional unit or larger one

T-stat should close at 38°F. Check continuity of control. If temperature is below 38°F, replace control

Check for adequate fan air across heater. Check control for open at 160°F & close at 150°F

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

is called for

Problem Possible Cause Action

Cooling adequate,

but heating

insufﬁ cient

Reversing valve fails to shift

Inoperative system switch Check for continuity of system switch

Heating capillary tube partially restricted

Check valve leaking internally

Reversing valve failing to shift completely; bypassing hot gas

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.

Check for partially starved outer coil. Replace heating capillary tube

Switch unit several times from heating to cooling. Check temperature rise across coil. Refer to speciﬁ cation sheet for correct temperature rise

De-energize solenoid coil, raise head pressure, energize solenoid to break loose. If valve fails to make complete shift, replace valve.

Components

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 Inﬂ ectional Axis 1 67700121 34 Swing Support 1 67700125 35 Fresh Air Door 1 67700212 36 Blower Wheel 1 67700116

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-D 110/120V 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

Models CP18C30 & CP18N30

No Description Qty Friedrich Part# Code

1 Supporter Assy 1 67700132 2 Self-threading Screw 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 6770011 1 11 Self-threading Screw 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-threading Screw ST4.2x22 6 67700153 17 Top Rail 1 67700134 18 Self-threading Screw 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 Inﬂ ectional Axis 1 67700121 34 Cross Beam 1 67700125 35 Fresh Air Door 1 67700123

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 T ray 1 67700131 47 Capacitor 7uF/450V 1 67700145 48 Capacitor CBB65 40uF/450V(TUV) 1 67700144 49 Relay 841-S-1A-D 200V/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

Components

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 Inﬂ ectional Axis 1 67700121 34 Swing Support 1 67700125 35 Fresh Air Door 1 67700212 36 Blower Wheel 1 67700243 37 Blower Front 1 67700108

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-D 110/120V 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

Front Panel 1 67700234

66 67 AS Window 1 67700235 68 Remote Cover 1 67700236 69 Basepan 1 67700250 70 Chassis Fixer 1 67700105 71 Remote Control 1 67700171

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

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.

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.

Friedrich Air Conditioning Co. Post Ofﬁ ce Box 1540 • San Antonio, Texas 78295-1540 4200 N. Pan Am Expressway • San Antonio, Te xas 782 1 8-5212 (210 ) 357-4400 • FAX (210) 357 -4480 www.friedrich.com

(10-04)

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

Friedrich Air Conditioni ng Co. Post Office Bo x 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)

Friedrich CP14-18-24 CP14N10, CP14-18-24 CP18N30, CP14-18-24 CP24N30, CP14N10, CP18N30 Service And Parts Manual

Specifications and Main Features

Frequently Asked Questions

User Manual