Friedrich 2007 Air Conditioner User Manual
Contents
1. cto OVERLOAD PROTECTOR e COMBINATION TERMINAL MEDIUM HEAT erol Ate obo Pde SYSTEM SWITCH O PLASTIC INSULATOR of of o INDOOR THERMOSTAT PART ONLY xlololololololololo 619 405 12 04 32 MODEL 509110 509110 WIRING DIAGRAM COMPRESSOR 1 TERMINAL ORIENTATION MAY VARY REVERSING MARKINGS RED SYSTEM THERMOSTAT 1 ALTERNATE COMPRESSOR N WIRE HARNESS BLUE OVERLOAD DEFROST THERMOSTAT YELLOW PROTECTOR PRESSOR PURPLE BLUE c CONNECTOR SWITCH TOR GE GREEN YELLOW INNERWALL GREEN OR MOTOR MOUNT GREEN CAPACITOR TO CAPACITOR BRACKET MEDIUM SWITCH LOGIC CLOSED LEGEND SWITCH POSITION CIRCUIT ANTICIPATOR RESISTOR 23 4151617 T8 IS 10 MONEY SAVER I GROUND LEAD oF 10 o of of of of of of of CAPACITOR tow CooL o x o COMPRESSOR COMBINATION TERMINAL MEDIUM COOL 1 10 PAN MOTOR O PLASTIC INSULATOR HIGH COOL fol ol fo x o OVERLOAD PROTECTOR x 0 10 0 0 REVERSING VALVE 5101010101015151012 OUTDOOR THERMOST SINT 0 0101010101010 OUTDOOR THERMOSTAT 619 405 17 33 MODELS YS13L33 A YM18L34 A rs WIRING DI2. BROWN CAPACITOR MEDIUM LEGEND TO INNERWALL MOTOR MOUNT HEATER LOW COOL MEDIUM COOL MEDIUM HEAT FAN ONLY ANTICIPATOR RESISTOR HTR MONEY SAVER ROCKER SWITCH CAPACITOR COMPRESSOR FAN MOTOR OVERLOAD PROTECTOR SYSTEM SWITCH INDOOR THERMOSTAT HEATER HEATER LIMIT THERMAL FUSE GROUND LEAD COMBINATION TERMINAL PLASTIC INSULATOR PART 619 405 16 02 31 MODEL EL36L35 A WIRING DIAGRAM RED BLUE 7 COMPRESSOR TERMINAL ORIENTATION YELLOW MAY VARY MARKINGS RED COMPRESSOR SYSTEM SWITCH L ALTERNATE YELLOW COMPRESSOR WIRE HARNESS YELLOW THERMOSTAT ORANGE GRAY OVERLOAD PROTECTOR COMPRESSOR WHITE BLACK FAN 40108 BLUE BLACK OR WHIT OR SUPPLY SMOOTH OR BLACK CORD CONDUCTOR ORANGE RIBBED OR WHITE 2 RED REEN YELLOW REEN F TO INNERWALL MOTOR MOUNT TO_CAPACITOR TO CAPACITOR BRACKET CAPACITOR BRACKET CHASSIS HEATER MEDIUM OVLD SWITCH LOGIC CLOSED SWITCH POSITION ANTICIPATOR RESISTOR L MONEY SAVER ROCKER switch HEATER HL HEATER LIMIT ol of of 010 THERMAL FUSE 112 OFF of ol TF LOW COOL Of o xIx o x MEDIUM COOL x o o x o x FAN MOTOR GROUND LEAD
3. ROCKER SWITCH GE IBBED OR WHITE CONDUCTOR R gt aoe g 92 io BRACKET CAPACITOR TO CAPACITOR HEATER BRACKET CHASSIS BLUE BLACK OR WHITE SMOOTH OR BLACK CONDUCTOR GREEN YELLOW TO INNERWALL GREEN DR MOTOR MOUNT REEN GREEN MEDIUM SWITCH LOGIC LEGEND Ri SWITCH POSITION CIRCUIT ANTICIPATOR RESISTOR HTR HEATER 11234 5 10 MONEY SAVER HEATER LIMIT ERE CAPACITOR THERMAL FUSE of of x x o x COMPRESSOR GROUND LEAD MEDIUM COOL 01 101 10 FAN MOTOR OVERLOAD COMBINATION TERMINAL 615 REVERSING VALVE PLASTIC INSULATOR IRIS INDOOR THERMOSTAT PART NO PEAN 0101010 OUTDOOR THERMOSTAT 619 405 04 35 m gt rriedrich Friedrich Air Conditioning Co Post Office Box 1540 San Antonio Texas 78295 1540 4200 Pan Am Expressway San Antonio Texas 78218 5212 210 357 4400 FAX 210 357 4480 www friedrich com Printed in the U S A RAC Svc 07 4 07
4. DE ICE CONTROL SWITCH SYSTEM NOTE OPTIONAL CONFIGURATION SMOOTH OR BLACK CONDUCTOR RED OR BLUE SUPPLY CORD RIBBED OR WHITE CONDUCTOR THERMOSTAT BLACK CAPACITOR RED OR BLUE TO CAPACITOR BRACKET ORANGE HEATER SCHEMATIC H HTR ce R MTR FAN CAP 5 SWITCH LOGIC Z LEGEND Men THERMAL FUSE OFF COMPRESSOR INSULATED TERMINAL FAN FAN MOTOR GROUND LEAD COOL OVERLOAD PROTECTOR 9 COMBINATION TERMINAL LOW COOL SYSTEM SWITCH Ses cu FLAG TERMINAL DIC DE ICE CONTROL LOW HEAT INDOOR THERMOSTAT EATER PART NO REV HI HEAT 617 581 17 02 SWITCH POSITION 30 SUPPLY CORD TO CAPACITOR BRACKET MODELS WIRING ES12L33 A ES16L33 A EM18L34 A EM24L35 A DIAGRAM COMPRESSOR TERMINAL ORIENTATION MAY VARY REFER_TO MARKINGS ON YELLOW L WHITE HAA RED COMPRESSOR ALTERNATE COMPRESSOR IRE HARNESS OVERLOAD PROTECTOR COMPRESSOR BLUE ANTICIPATOR NT RESISTOR IBBED WHITE RED DRANGE N DRANGE CONNECTOR GREEN YELLOW GREEN DR ONDUCTOR BRACKET CHASSIS 4 m zi 2 a R C S z o YELLOW
5. Reversing valve failing to shift completely bypassing hot gas 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 specification 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 TROUBLESHOOTING CHART COOLING REFRIGERANT SYSTEM DIAGNOSIS HEATING High Suction Pressure High Load Conditions High Air Flow Across Indoor Coil Low Head Pressure Low Suction Pressure Low Load Conditions Low Air Flow Across Indoor Coil High Head Pressure High Load Conditions Low Air Flow Across Outdoor Coil Overcharged Noncondensables air Low Load Conditions Refrigerant System Restriction Refrigerant System Restriction Reversing Valve not Fully Seated Overcharged Defective Compressor Reversing Valve not Fully Seated Undercharged in System Undercharged Moisture in System Defective Compressor 22 TROUBLESHOOTING CHART HEATING REFRIGERANT SYSTEM DIAGNOSIS HEATING Low Suction Pressure High Suction Pressure Low Head Pressure High Head Pressure Low Airflow Outdoor Ambient Too High Refrigerant System Outdoor Ambient Too High Across Outdoor Coil for Operation in Heating Restriction For Operation In Heating Refrigerant System Reversing Valve not Rever
6. Number Identification Guide Serial Number Decade Manufactured L 0 C 3 F 6 A 1 D 4 G 7 B 2 E 5 H 8 Year Manufactured A 1 D 4 G 7 B 2 E 5 H 8 C 3 F 6 J 9 Month Manufactured A Jan D Apr G Jul K Oct B Feb H Aug L Nov C Mar F Jun J Sept M Dec 8th Digit Engineering Major change 7th Digit Options 0 Straight Cool amp Heat Pump Models 1 1 KW Heat Strip Normal 3 KW Heat Strip Normal 4 4 KW Heat Strip Normal 5 5 KW Heat Strip Normal 6th Digit Voltage 1 115 Volts 3 230 208 Volts 5th Digit Alphabetical Modifier 00001 Production Run Number Product Line P PTAC EAC V VPAK H Split PERFORMANCE DATA oz OEZ 380Z Oe TOL uc S gc 8 96L ve 80 10ZHS OEZ 830Z suc gsc 9L 86 902 9c vs S OE 1STHS OE OEC B0Z og os LIUL6 TE 892 22 S T vct gc og OEZ 830Z OvL os 9vc clL e 6 SZT zs OE OEZ 830Z 009 6 os OST ZOE OL EET 6r ove ona 2 og occ Soc 97s 6 82 OL z cor 6r Os0E TOETS oc OEZ 380Z TOS 089 esc L 9S 82 8215 oz OES B0Z o
7. a sp son oW Timer 9p 2 2 E CENTER Electronic Control ELECTRONIC CONTROLS TESTING THE ELECTRONIC CONTROL XQ WS BOARDS amp QME BOARDS Activating Test Mode Activate test mode by pressing at the same time the MODE button and the temperature DOWN button on XQ amp WS models LEDs for Hour Start and Stop will blink 1 bps while Test Mode is active Activate test mode by pressing at the same time the MONEY SAVER button and the CHECK FILTER button on QME models LED for the Filter Alert will blink 1 bps while Test Mode is active Test Mode has duration of 90 minutes Test Mode can be activated under any conditions including Off Test Mode is cancelled by pressing the On Off button unplugging the unit or when the 90 minutes is timed out All settings revert to the factory default settings of Cool 75 F Timer and Set Hour features are nonfunctional Test Mode overrides the three minute lockout all delays for compressor and fan motor start speed change and delay when switching modes Test Mode default settings are ON Money Saver 60 F and High fan speed Activating Error Code Mode Submode of Test Mode Unit must be in Test Mode to enter Error Code Mode Activate Error Code Mode by pressing the TIMER ON OFF button on XQ amp WS models LED for the TIMER ON OFF will flash 1 bps while Error Code Mode is active Pressing the TEMP HR button will
8. display 00 Consecutive presses will scroll through all error codes logged Press the TEMP HR button to see the reverse order of all error codes logged When the end of logged error codes is reached the temperature set point will appear Activate Error Code Mode by pressing at the same time the A C START button and the ON OFF button on QME models LED for the TIMER ON OFF will flash 1 bps while Error Code Mode is active Pressing the WARMER button will display 00 Consecutive presses will scroll through all error codes logged Press the COOLER button to see the reverse order of all error codes logged When the end of logged error codes is reached the temperature set point will appear TESTING THE ELECTRONIC CONTROL ERROR CODE LISTINGS IMPORTANT Error Codes are cleared from the log by exiting from Error Code Mode To exit on XQ models press Timer On Off button To exit QME models press A C Start and On Off buttons Or unplug unit to exit Error Code Mode Plug unit in after 5 seconds to resume normal operation of unit TESTING THE ELECTRONIC CONTROL ERROR CODE LISTINGS E1 SHORT CYCLE SITUATION Keyboard is fine Investigate and define short cycling problem E2 KEYBOARD STUCK ERROR If key button s are pressed continuously for twenty seconds or more If MODE key is stuck unit will default to cool Exit Error Code Mode to see if error E2 is no longer displayed and unit is functioning Re
9. mechanical as well as the power supply Use proper testing instruments voltmeter ohmmeter ammeter wattmeter etc to perform electrical tests Use an air conditioning or refrigeration thermometer to check room outdoor and coil operating temperatures Use a sling psychrometer to measure wet bulb temperatures indoors and outdoors Inspect the surrounding area inside and outside to ensure that the units clearances have not been compromised or altered Inspect the sleeve and drain system periodically at least yearly or bi yearly and clean of all obstructions and debris Clean both areas with an antibacterial and antifungal cleaner Rinse both items thoroughly with water and ensure that the drain outlets are operating correctly Check the sealant around the sleeve and reseal areas as needed Clean the front cover when needed Use a mild detergent Wash and rinse with warm water Allow it to dry thoroughly before reinstalling it in the chassis UNIT IDENTIFICATION Model Number Code SS08L 10 A 1st Digit Function S Straight Cool Value Series Y Heat Pump E Electric Heat K Straight Cool R Straight Cool X Straight Cool W Thru the Wall WallMaster Series 2nd Digit C Casement Q Q Star S Small Chassis M Medium Chassis L Large Chassis H HazardGard 3rd and 4th Digit Approximate BTU HR Cooling Heating BTU Hr capacity listed in the Specification Performance Data Section RAC Serial
10. 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 COMPRESSORSPECIAL TROUBLESHOOTING AND SERVICE 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
11. 405 11 27 MODEL SL28L30 A meu renim WIRING DIAGRAM IDRIENTATIDN MAY VARY REFER MARKING ON COMPRESSOR ALTERNATE COMPRESSOR OVERLOAD PROTECTOR HARNESS COMPRESSOR MOLDED RESISTOR BLACK OR WHITE CONDUCTOR SMOOTH OR BLACK SUPPLY CORD GREEN OR GREEN YELLOW GREEN YELLOW GREEN OR TO INNERWALL TD CAPACITOR OR MOUNT RIBBED OR WHITE BRACKET CONDUCTOR SWITCH LOGIC ANTICIPATOR RESISTOR SWITCH POSITION MONEY SAVER ROCKER SWITCH 1 CAPACITOR rr COMPRESSOR GROUND LEAD FAN MOTOR e COMBINATION TERMINAL IX O O OVERLOAD PROTECTOR PLASTIC INSULATOR SYSTEM INDOOR THERMOSTAT PART NO REV FAN ONLY o 619 405 01 28 START CAPACITOR __ x TO CAPACITOR BRACKET TU CHASSIS LOSED ANTICIPATOR RESISTOR INNERWALL MODELS SL36L30 B WIRING DIAGRAM s BROWN ROCKER SWITCH CONDUCTOR THERMOSTAT ORANGE SUPPLY CORD SMOOTH OR BLACK MOTOR WIRE HARNESS TO CAPACITOR BRACKET 6 WAY MULTI PIN CONNECTOR RIBBED OR WHITE CONDUCTOR MOTOR MOUNT ANTICIPATOR RESISTOR MONEY SAVER ROCKER SWITCH CAPACITOR COMPRESSOR GROUND LEAD FAN MOTOR COMBINATION TERMINAL OVERLOAD PROTECTOR O PLASTIC INSULATOR SYSTEM SWITCH INDOOR THERMOSTAT PART NO HARD START KIT 619 142 13 29 MODEL EQO8L11 A WIRING DIAGRAM COMPRESSOR
12. A RM18L30 A KM18L30 A KM21L30 A RM24L30 A KM24L30 A COMPRESSOR TERMINAL COMPRESSOR ORIENTATION MAY VARY 7 ey MARKINGS 4 COMPRESSOR BLUE COMPRESSOR WIRE HARNESS DR WHITE x o lt ond OVERLOAD ALTERNATE PROTECTOR COMPRESSOR WIRING DIAGRAM PURPLE 1 1 SWITCH ROCKER GE ANTICIPATOR RESISTOR CAPACITOR RED THERMOSTAT 5 69 TO CHASSIS OR GREEN YELLOW FAN INNERWALL MOTOR MOTOR MOUNT X CLOSED SWITCH LOGIC 0 OPEN LEGEND RIBBED OR WHITE CONDUCTOR SWITCH 0 BLUE 11 j SMOOTH DR BLACK CONDUCTOR aE i gt SUPPLY CORD GREEN OR GREEN YELL TO CAPACITOR BRACKET ANTICIPATOR RESISTOR MONEY SAVER ROCKER SWITCH CAPACITOR COMPRESSOR GROUND LEAD FAN MOTOR e OVERLOAD PROTECTOR O SYSTEM SWITCH INDOOR THERMOSTAT COMBINATION TERMINAL PLASTIC INSULATOR PART REV 619 405 00 01 25 26 MODELS 5508110 SS10L10 A B 5512110 SS12L30 A B SS14L10 A B SS16L30 A B SM18L30 A B SM21L30 A B SM24L30 A B COMPRESSOR TERMINAL COMPRESSOR ORIENTATION MAY VARY REFER TO MARKINGS ON COMPRESSOR OVERLOAD PROTECTOR COMPRESSOR HARNESS CAPACITOR WIRING DIAGRAM RED BLACK ALTERNATE COMPRESSOR SUPPLY SMOOTH OR BLA
13. AGRAM REVERSING VALV COMPRESSOR TERMINAL ORIENTATION MAY VARY REFER TO MARKINGS ON SYSTEM RED COMPRESSOR ALTERNATE COMPRESSOR WIRE HARNESS BLUE OVERLOAD PROTECTOR COMPRESSOR WHITE DEFROST THERMOSTAT BLUE ORANGE BROWN RED c CONNECTOR E ANTICIPATOR RESISTOR SMOOTH OR BLACK CONDUCTOR ORANGE i IBBED OR WHITE CONDUCTOR RED n GREEN YELLOW TO INNERWALL GREEN OR MOTOR MOUNT TO_CAPACITOR BRACKET CHASSIS R gt a gt GREEN c 2 x Ol TO CAPACITOR 34 BRACKET MEDIUM SWITCH LOGIC CLOSED OPEN ISWITCH_ POSITION MEDIUM COOL HIGH COOL x oJo x amp leleleellele X 0 0 1 01 10 o Ix o ANTICIPATOR RESISTOR MONEY SAVER CAPACITOR COMPRESSOR FAN MOTOR OVERLOAD REVERSING VALVE INDOOR THERMOSTAT OUTDOOR THERMOSTAT HEATER HEATER LIMIT THERMAL FUSE GROUND LEAD COMBINATION TERMINAL PLASTIC INSULATOR PART NO 619 405 15 02 MODELS YL24L35 A WIRING DIAGRAM COMPRESSOR TERMINAL ORIENTATION MAY VARY REFER MARKINGS pom THERMOSTAT SYSTEM SWITCH RED YELLOW M R compressor COMPRESSO WIRE HARNESS OVERLOAD DEFROST PROTECTOR THERMOSTAT WHITE BLACK BLACK BLUE ORANGE PURPLE
14. CK CONDUCTOR e 80 GREEN YELLOW GREEN OR TO CAPACITOR BRACKET TO CHASSIS SCHEMATIC L1 TO CAPACITOR BRACKET RIBBED OR WHITE CONDUCTOR GREEN OR GREEN YELLOWf INNERVALL AMOTOR MOTOR MOUNT NEUTRAL 115 V L2 230 208 SWITCH LOGIC X SWITCH POSITION OFF HI COOL MED COOL LOW COOL LEGEND CAPACITOR COMPRESSOR FAN MOTOR COMBINATION TERMINAL OVERLOAD PROTECTOR i GROUND LEAD PART NO 619 405 06 02 MODEL SL36L30 A are TERMINAL IDRIENTATIUN MAY VARY TO MARKING ON COMPRESSOR WIRING DIAGRAM REFER ALTERNATE COMPRESSOR OVERLOAD PROTECTOR ANTICIFATOR HARNESS COMPRESSOR MOLDED BLACK OR WHITE CAPACITOR ROCKER SWITCH GE THERMOSTAT ORANGE x CHASSIS GREEN OR GREEN YELLUW ID INNERWALL MOTOR MOUNT BLUE SWITCH LOGIC CLOSED LEGEN SMOOTH OR BLACK SUPPLY CORD GREEN YELLUW GREEN OR CAPACITOR BRACKET a A m m c CONDUCTOR HERM ANTICIPATOR RESISTOR SWITCH POSITION MONEY SAVER ROCKER SWITCH CAPACITOR COMPRESSOR FAN MOTOR LOW COOL OVERLOAD PROTECTOR MED COOL SYSTEM SWITCH INDOOR THERMOSTAT GROUND LEAD COMBINATION TERMINAL PLASTIC INSULATOR PART NO 619
15. IDED 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 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 a corrosive atmosphere default or delay in performance caused war government restrictions or restraints strikes material shortages beyond the control of FRIEDRICH or acts of God OBTAINING WARRANTY PERFORMANCE Service will be provided by the FRIEDRICH Authorized Dealer or Service Organization in your area They are listed in the Yellow Pages If assistance is required in obtaining warranty performance write to Room Air Conditioner Service Manager Friedrich Air Cond
16. ace compressor COOLING ONLY ROOM AIR CONDITIONERS TROUBLESHOOTING TIPS Problem Possible Cause Action Check voltage at compressor 115V amp 230V units Low voltage will operate at 10 voltage variance Set t stat to coldest position Test t stat amp 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 amp resistance Open overload Test overload protector amp replace if inoperative Open capacitor Test capacitor amp replace if inoperative Test for continuity in all positions Replace if Inoperative system switch inoperative Refer to appropriate wiring diagrams to check wiring T stat not set cold enough or inoperative Broken loose or incorrect wiring Problem Possible Cause Action Inoperative system switch Test switch amp replace if inoperative Broken loose or incorrect wiring Refer to applicable wiring diagram Fan motor Open capacitor Test capacitor amp replace if inoperative does not run Fan speed switch open Test switch amp replace if inoperative Test fan motor amp replace if inoperative be sure Inoperative fan motor 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 am
17. ailure 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 Install a process tube to sealed system Make necessary repairs to system Evacuate system to 250 300 microns or less w Weigh in refrigerant with the property quan
18. ce needs of entire unit Problem Possible Cause Action Insufficient air circulation thru area to be air conditioned Excessive moisture Operate in MoneySaver position Inadequate vapor barrier in building structure 1 Advise customer particularly floors Problem Possible Cause Action T stat differential too narrow Replace t stat Plenum gasket not sealing allowing discharge air i T stat short cycles to short cycle t stat Check gasket Reposition or replace as needed Adjust louvers for best possible air circulation Restricted coil or dirty filter Clean amp advise customer of periodic cleaning amp maintenance needs of entire unit Problem Possible Cause Action Anticipator resistor wire disconnected at t stat Refer to appropriate wiring diagram or system switch Disconnect plus from outlet Remove resistor from bracket Insert plug amp depress COOL Anticipator resistor shorted or open amp FAN AUTOMATIC buttons Place t stat to warmest setting Feel resistor for temperature If no heat replace resistor Partial loss of charge in t stat bulb causing a wide Replace t stat differential Problem Possible Cause Action Prolonged off cycles automatic operation Evaporator drain pan cracked or obstructed Repair clean or replace as required Detach shroud from pan amp coil Clean amp remove Water in compressor area old sealer Reseal reinstall amp check Outside water lea
19. dication 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 Accumulator Suction Pressure Much Lower Compressor Running Quieter than Normal Amps Lower Head Pressure Outdoor Indoor Coil Lower Coil Undercharged System OVERCHARGED REFRIGERANT SYSTEMS Compressor amps will be near normal or higher Noncon densables can also cause these symptoms To confirm remove some of the charge if conditions improve system may be overcharged If conditions don t improve Noncon densables 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 de
20. efrigerant 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 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 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 Reversing Valve Outdoor Coil Gauges may equalize very slowly Partially Restricted System Accumulator Suction Pressure Indoor Coil Outdoor Coil Compressor Gauges will not equalize with unit shut off Completely Restricted System TROUBLESHOOTING TOUCH TEST CHART TO SERVICE REVERSING VALVES NOTES VALVE OPERATING CONDITION TEMPERATURE OF VALVE BODY WARMER THAN VALVE BODY DISCHARGE TUBE from Compressor SUCTION TUBE to Compressor Tube to INSIDE Tube to OUTSIDE COIL LEFT Pilot Capillary Tube RIGHT Pilot Capillary Tube N POSSIBLE CAUSES CORRECTIONS Normal Cooling Normal Heating MALFUNCTION OF VALVE Valve will not shift fro
21. ezes up Short of refrigerant De ice coil amp check for leak Inoperative fan motor Test fan motor amp replace if inoperative De ice coil Check temp differential delta T Partially restricted capillary tube across coil Touch test coil return bends for same temp Test for low running current Problem Possible Cause Action Unit undersized Test cooling performance amp replace with larger unit if needed MEET Check for partially iced coil amp check temperature Restriction in line split across coil Check for oil at silver soldered connections Refrigerant leak Check for partially iced coil Check split across coil Check for low running amperage T stat contacts stuck Check operation of t stat Replace if contacts remain closed T stat incorrectly wired Refer to appropriate wiring diagram Problem Possible Cause Action Excessive heat load Compressor runs continually amp does not cycle off Disconnect power to unit Remove cover of t stat amp check if contacts are stuck If so replace t stat T stat does not turn T stat set at coldest point Turn to higher temp setting to see if unit cycles unit off off Refer to appropriate wiring diagrams Unit undersized for area to be cooled Refer to industry standard sizing chart T stat contacts stuck 18 COOLING ONLY ROOM AIR CONDITIONERS TROUBLESHOOTING TIPS Problem Possible Cause Action Check operation of unit Replace overload if system o
22. gerant 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 I Suction Discharge Line T Line Evaporator costae _ Coil e 209 oil ___ PS gt Compressor Metering Device Refrigerant Drier Li
23. he 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 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 4 Drift dry nitrogen through the system and un solder the more distant connection first Filter drier high side process tube etc 5 Replace inoperative component and always install new filter drier Drift dry nitrogen through the system when making these connections HERMETIC COMPONENT REPLACEMENT cont d 6 Pressurize system to 30 PSIG with proper refrigerant and boost refrigerant pressure to 150 PSIG with dry nitrogen 7 Leak test complete system with electric halogen leak detector correcting any leaks found Reduce the system to zero gauge pressure 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
24. inned 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 refri
25. itioning 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 ROUTINE MAINTENANCE NOTE Units are to be inspected and serviced by qualified service personnel only Routine maintenance is required annually or semi annually depending upon annual usage 1 Clean the unit air intake filter least every 250 to 300 fan hours of operation or whe
26. ks 0 orbid SEHE HINT se pressure wash or biodegradable cleaning Obstructed condenser coil agent to clean Fan blade slinger ring improperly positioned Adjust fan blade to 1 2 of condenser coil 20 HEAT COOL ROOM AIR CONDITIONERS TROUBLESHOOTING TIPS Problem Possible Cause Action Disconnect power to unit Remove resistor from t stat bulb block Plus in unit amp allow to operate Feel resistor for heat If not heat replace resistor Heat anticipator resistor shorted on applicable models Room temperature Basin Wide differential partial loss of t stat bulb charge Replace t stat amp check Refer to appropriate wiring diagram Resistor is Incorrect wiring 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 amp TM1 on timer If no applicable models voltage replace control If outside coil temperature is 25F or below amp preselected time limit has elapsed replace defrost control Defrost control out of calibration applicable Unit will not defrost made If contacts remain closed between terminals 2 Defrost control contacts stuck amp 3 of the defrost control after preselected time interval has passed replace control Defrost control bulb removed from or not making Reinstall amp be assured that good bulb to coil good coil contact co
27. ler port Body damage Replace valve Both ports of pilot open Raise head pressure operate solenoid If no shift use valve with smaller ports Body damage Valve hung up at mid stroke Pumping vol ume of compressor not sufficient to maintain reversal Replace valve Raise head pressure operate solenoid If no shift use valve with smaller ports Both ports of pilot open Piston needle on end of slide leaking Raise head pressure operate solenoid If no shift replace valve Operate valve several times then recheck If excessive leak replace valve Pilot needle and piston needle leaking Pressure differential too high Clogged pilot tube Operate valve several times then recheck If excessive leak replace valve Stop unit Will reverse during equalization period Recheck system Raise head pressure operate solenoid to free dirt If still no shift replace valve Dirt in bleeder hole Raise head pressure operate solenoid Remove valve and wash out Check on air before reinstalling if no movement replace valve Add strainer to discharge tube Mount valve horizontally Piston cup leak Stop unit After pressures equalize restart with solenoid de energized If valve shifts reattempt with compressor running If it still will not reverse while running replace the valve Defective pilot Replace valve Defective compressor Repl
28. m cool to heat Valve will not shift from cool to heat Starts to shift but does not complete reversal Apparent leap in heating Will not shift from heat to cool 16 Check Electrical circuit and coil Check refrigeration charge No voltage to coil Repair electrical circuit Defective coil Low charge Replace coil Repair leak recharge system Pressure differential too high Recheck system Pilot valve okay Dirt in one bleeder hole De energize solenoid raise head pres sure reenergize solenoid to break dirt loose If unsuccessful remove valve wash out Check on air before installing If no movement replace valve add strainer to discharge tube mount valve horizontally Piston cup leak Clogged pilot tubes Stop unit After pressures equalize restart with solenoid energized If valve shifts reattempt with compressor running If still no shift replace valve Raise head pressure operate solenoid to free If still no shift replace valve Both ports of pilot open Back seat port did not close Raise head pressure operate solenoid to free partially clogged port If still no shift replace valve Defective Compressor Not enough pressure differential at start of stroke or not enough flow to maintain pres sure differential Replace compressor Check unit for correct operating pressures and charge Raise head pressure If no shift use valve with smal
29. n and approximately three minutes delay before the compressor is activated providing that the mode was set for cooling and the set point temperature has not been met in the room REFRIGERATION SYSTEM SEQUENCE OF OPERATION A good understanding of the basic operation of the refrigera tion system is essential for the service technician Without this understanding accurate troubleshooting of refrigeration system problems will be more difficult and time consuming if not in some cases entirely impossible The refrigeration system uses four basic principles laws in its operation they are as follows 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 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 f
30. n the unit s indicator light is on if so equipped Clean the filters with a mild detergent in warm water and allow to dry thoroughly before reinstalling The indoor coil evaporator coil the outdoor coil condenser coil and base pan should be inspected periodically yearly or bi yearly and cleaned of all debris lint dirt leaves paper etc Clean the coils and base pan with a soft brush and compressed air or vacuum If using a pressure washer be careful not to bend the aluminium fin pack Use a sweeping up and down motion in the direction of the vertical aluminum fin pack when pressure cleaning coils Cover all electrical components to protect them from water or spray Allow the unit to dry thoroughly before reinstalling it in the sleeve NOTE Do not use a caustic coil cleaning agent on coils or base pan Use a biodegradable cleaning agent and degreaser gt o Inspect the indoor blower housing evaporator blade condenser fan blade and condenser shroud periodically yearly or bi yearly and clean of all debris lint dirt mold fungus etc Clean the blower housing area and blower wheel with an antibacterial antifungal cleaner Use a biodegradable cleaning agent and degreaser on condenser fan and condenser shroud Use warm or cold water when rinsing these items Allow all items to dry thoroughly before reinstalling them Periodically at least yearly or bi yearly inspect all control components both electrical and
31. nit s cooling and heating capacity rating G the amperes and the energy efficiency ratio FUNCTIONAL COMPONENT DEFINITIONS MECHANICAL COMPONENTS Bellows condensate valve Temperature sensitive valve that opens up to drain off condensate water when the outside temperature falls below 40 F and closes when the outside temperature reaches 58 F 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 System switch Used to regulate the operation of the fan motor the compressor or to turn the unit off For troubleshoot ing refer to the wiring diagrams and schematics in the back of this service manual Capacitor Reduces line current and steadies the voltage supply while greatly improving the torque characteristics of the fan motor and c
32. ntact is made Problem Possible Cause Action 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 efficiently check if insulation can be added to attic or walls If insulation is adequate recommend additional unit or larger one Exhaust or fresh air door open Unit undersized Does not heat adequately T stat should close at 38 F Check continuity of Outdoor t stat open applicable models control If temperature is below 38 F replace control Heater hi limit control cycling on amp off Check for adequate fan air across heater Check yong control for open at 160 F amp close at 150 F Shorted supplementary heater Ohmmeter check approx 32 35 ohms Check applicable wiring diagram 21 HEAT COOL ROOM AIR CONDITIONERS TROUBLESHOOTING TIPS Possible Cause tion Refer to applicable wiring diagram Defective solenoid coil Check for continuity of coil Unit cools when heat is called for Reversing valve fails to shift Block condenser coil amp switch unit to cooling Allow 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 Cooling adequate but heating insufficient Check valve leaking internally
33. om psi eoe duni u3duar gt asna Squnssqud SA ees eR INWY OJHA ur TORLONIA aes ECNOO 5 pieopiezeH ELECTRICAL DATA Wire Size Fuse Circuit Breaker Grounding Receptacle Use ONLY wiring size recommended for single outlet branch circuit Use ONLY type and size fuse or HACR circuit breaker indicated on unit s rating plate Proper current protection to the unit is the responsibility of the owner Unit MUST be grounded from branch circuit through service cord to unit or through separate ground wire provided on permanently connected units Be sure that branch circuit or general purpose outlet is grounded The field supplied outlet must match plug on service cord and be within reach of service cord Do NOT alter the service cord or plug Do NOT use an extension cord Refer to the table above for proper receptacle and fuse type ELECTRIC SHOCK HAZARD Turn off electric power before service or installation All electrical connections and wiring MUST be installed by a qualified electrician and conform to the National Electrical Code and all local codes which have jurisdiction Failure to do so can result in property damage personal injury and or death The consumer through the AHAM Room Air Conditioner Certification Program can be certain that the AHAM Certification Seal accurately states the u
34. ompressor motor ELECTRONIC CONTROLS TESTING THE ELECTRONIC CONTROLS CHECK FILTER light will come on after 250 hours of use Touch CHECK FILTER to reset ELECTRICAL COMPONENTS cont d MoneySaver switch When engaged it sends the power supply to the fan motor through the thermostat which allows for a cycle fan operation Fan Motor Dual shafted fan motor operates the indoor blower wheel and the condenser fan blade simultaneously Solenoid Used to energize the reversing valve on all heat pump units Heating element Electric resistance heater available in 3 3 4 0 or 5 2 kW on select TwinTemp models 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 Reversing valve A four way switching device used on all heat pump models to change the flow of refrigerant to permit heating or cooling Check valve A pressure operated device used to direct the flow of refrigerant to the proper capillary tube during either the heating or cooling cycle Capillary tube A cylindrical meter device used to evenly dis tribute the flow of refrigerant to the heat exchangers coils QuietMaster PROGRAMMABLE PM BL Cow Set Check Hour Filter Press to reset Power a Money Mode Cool Saver Only 1 4 Smart Speed Fan
35. p replace if T stat open or inoperative necessary Dirty filter Clean as recommended in Owner s Manual Use pressure wash biodegradable cleaning Dirty or restricted condenser or evaporator coil Does not cool or agent to clean only cools slightly Adjust discharge louvers Use high fan speed Fresh air or exhaust air door open on applicable Close doors Instruct customer on use of this models feature Low capacity undercharge Check for leak amp make repair Check amperage draw against nameplate If not Compressor not pumping properly conclusive make pressure test 17 COOLING ONLY ROOM AIR CONDITIONERS TROUBLESHOOTING TIPS Problem Possible Cause Action Replace fuse reset breaker If repeats check Fuse blown or circuit tripped fuse or breaker size Check for shorts in unit wiring amp components Power cord not plugged in Plug it in nit does not run EE 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 amp connections Reconnect per components wiring diagram Problem Possible Cause Action Dirty filter Clean as recommended in Owner s Manual Check for dirty or obstructed coil Use pressure Restricted airflow wash biodegradable cleaning agent to clean Inoperative t stat Test for shorted t stat or stuck contacts Evaporator coil fre
36. pending upon amount of overcharge Suction pressure should be slightly higher Accumulator Suction Pressure Noticeably High Q Pressure Compressor Slightly Slugged with Higher Refrigerant Indoor Coil Overcharged System REFRIGERANT CHARGING cont d 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 apartial 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 acomplete restriction there will be no sound at the me tering device entrance An amperage check of the compres sor 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 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 Accumulator Suction Pressure Indoor Coil Lower Troubleshooting a restricted r
37. peration is satisfactory Overload inoperative Opens too soon Allow a minimum of 2 minutes to allow pressures to equalize before attempting to restart Instruct customer of waiting period Compressor restarted before system pressures equalized Check voltage with unit operating Check for other appliances on circuit Air conditioner should Compressor runs for 9 9 be in separate circuit for proper voltage amp fused short periods only separately Cycles on overload 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 propertamspead on looked condenser Check for kinked discharge line or restricted Compressor running abnormally hot condenser Check amperage Problem Possible Cause Action Place jumper across t stat terminals to check if unit operates If unit operates replace t stat Loss of charge in t stat bulb T stat does not turn unit on Loose or broken parts in t stat Check as above 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 Check that compressor grommets have not Compressor vibrating deteriorated Check that compressor mounting parts are not missing Check assembly amp parts for looseness r
38. place board if E2 still displays after exiting Error Code Mode E3 FROST PROBE OPEN If ohm value is present replace board E4 FROST PROBE SHORT Replace board E5 INDOOR PROBE OPEN Replace board E6 INDOOR PROBE SHORT Replace board NOTE All Error Code displays for Frost amp Indoor Probe will allow unit to operate Unit may or will ice up if faulty components not replaced FROST PROBE SENSOR disables compressor at 35 F INDOOR PROBE SENSOR Control range is 60 F to 90 F 2 F Indoor temperature will be displayed by pressing QME units The Fan Speed button and the Warmer button XQ units The Fan Speed button and the Temp Up button The indoor temperature will be displayed for 10 seconds The display will change back to the Set Point temperature by pressing any key button except for the On Off button The indoor temperature can be viewed in all modes including test mode Check Filter The Check Filter indicator turns on after the fan motor has been operating for 250 hours The Check Filter indicator is reset by pressing the Check Filter button one time only Power failures will not reset the 250 hour timer All time elapsed is stored in memory and resumes counting after power is restored Keep Alive The electronic control has a memory to retain all functions and status as set up by the user in the event of a power failure Once power is restored to the unit there is a two second delay before the fan comes o
39. quid Line B y SEALED REFRIGERATION SYSTEM REPAIRS IMPORTANT ANY SEALED SYSTEM REPAIRS TO COOL ONLY MODELS REQUIRE THE INSTALLATION OF A LIQUID LINE DRIER ALSO ANY SEALED SYSTEM REPAIRS TO HEAT PUMP MODELS REQUIRE THE INSTALLATION OF A SUCTION LINE DRIER EQUIPMENT REQUIRED Voltmeter Ammeter Ohmmeter E P A Approved Refrigerant Recovery System Vacuum Pump capable of 200 microns or less vacuum Acetylene Welder NOP m FF ODN gt Electronic Halogen Leak Detector G E Type H 6 or equivalent 8 Accurate refrigerant charge measuring device such as a Balance Scales 1 2 2 accuracy b Charging Board 1 2 oz accuracy 9 High Pressure Gauge 0 400 Ibs 10 Low Pressure Gauge 30 150 Ibs 11 Vacuum Gauge 0 1000 microns EQUIPMENT MUST BE CAPABLE OF 1 Recovery 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 t
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41. rriedrich Service Manual 2007 Room Air Conditioners ssa _ Ch 1 a E E RAC Svc 07 4 07 TABLE OF CONTENTS Introduction Typical Unit COMpOnentt ccccccceseeceeeeseeceeeceeeaeeeceesaceessecaesaeecaeeaeeeseaeaecesaeeesaecaeeeseesaseasaeseesaseeseesaeeeseesaneataneaees 3 4 Mairitenarice ss i at ee nd ate IU ORE Rim ind 5 Unit Identification 7 A 6 7 Electrical Datta iis creed aoe lee d d dte ee a de eee 8 Functional Component Definitions u L U a u au aa aaa aa aa aus 9 Electronic Controls ve lee eU b e earl oo P ented eee 9 10 Refrigeration Sequence Of Operation 8 11 Sealed Refrigeration Repa Simprentis a niite airon daien a AaS ra r ara aana ae a aeaaea aaaea Taaa Ah Taa aaa ania Ta ELAYE SE 11 12 Refrigerant Charging src wien E EE E ae ee 13 15 TrOUDIGSNOOUNG eeoa 16 23 Wiring DIagraims i peer ERU HI RE EPI PB aera aa dao Pe PM 24 35 WARNING The information contained in this manual is intended for u
42. se 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 INTRODUCTION This service manual is designed to be used in conjunction with the installation manuals provided with each air conditioning system component This service manual was written to assist the professional RAC service technician to quickly and accurately diagnose and repair malfunctions This manual will deal with subjects in a general nature i e all text will not pertain to all models TYPICAL UNIT COMPONENTS Fresh Air Compressor Capillary Tube Liquid Filter Driers Reversing Valve 21 Condenser Coil some models Front Cover _ Discharge Air Outdoor Grille Evaporator Coil Sleeve Return Air Grille Filter Blower Wheel Blower Mo
43. sing Valve not Low Airflow Across Restriction Fully Seated Fully Seated Indoor Coil Undercharged Overcharged Undercharged Overcharged Moisture in System Defective Compressor Defective Compressor Noncondensables air ELECTRICAL TROUBLESHOOTING CHART HEAT PUMP HEAT PUMP SYSTEM COOLS WHEN HEATING IS DESIRED Is Line Voltage Is the Selector Switch Present at the Solenoid an Set for Heat Is the Solenoid Coil Good Replace the Solenoid Coil YES Reversing Valve Stuck Replace the Reversing Valve 23 MODELS XQ05L10 A B XQ06L10 A B C D XQ08L10 A B XQ10L10 A B XQ12L10 A B COMPRESSOR ELECTRONIC CONTROL COMPRESSOR OMEN T ATIC WIRING DIAGRAM ORIENTATION MAY VARY REFER_TO MARKINGS ON COMPRESSOR OVERLOAD PROTECTOR COMPRESSOR WIRE HARNESS CONDUCTOR SUPPLY CORD SMOOTH OR BLACK GREEN YELLOW CAPACITOR TO CAPACITOR BRACKET RIBBED OR WHITE CONDUCTOR MOTOR WIRE BLUE HARNESS TO CAPACITOR BRACKET TO INNERWALL TO CHASSIS MOTOR MOUNT SCHEMATIC NEUTRAL 115 v X CLOSED SWITCH LOGIC SWITCH POSITION CIRCUIT CAP CAPACITOR COMPR COMPRESSOR MTR MOTOR COMBINATION TERMINAL OVLD OVERLOAD PROTECTOR GROUND LEAD PART NO 619 142 114 24 MODELS KS10L10 A RS10L10 A 512110 KS12L30 A 515110 RS15L10 A RS16L30
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45. tity of R 22 refrigerant N Start unit and verify performance 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 REFRIGERANT CHARGING cont d 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 NOTE Heat pump refrigeration drawing 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 in
46. to the new compressor 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 f
47. tor eq Condenser Fan Blade Basepan IMPORTANT It will be necessary for you to accurately identify the unit you are servicing so you can be certain of a proper diagnosis and repair See Unit Identification rriedrich 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 PROV
48. ubbing Improperly mounted or loose cabinet parts amp rattling Problem Possible Cause Action Evaporator drain pan overflowing Clean obstructed drain trough Evaporator drain pan broken or cracked Reseal Condensation forming on base pan or replace Poor installation resulting in rain entering the Check installation instructions Reseal as Water leaks into the room required room Clean the dirty evaporator coil Use pressure Condensation on discharge grille louvers J 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 Noisy operation 19 COOLING ONLY ROOM AIR CONDITIONERS TROUBLESHOOTING TIPS Problem Possible Cause Action Ensure that foam gaskets are installed in between window panes amp in between the unit amp the sleeve Also ensure that fresh air exhaust vents on applicable models are in the closed position amp are in tact Sublimation When unconditioned saturated outside air mixes with conditioned air condensation forms on the cooler surfaces Water spitting into room Follow installation instructions to ensure that Downward pitch of installation is too steep downward pitch of installed unit is no less than 1 4 amp no more than 3 8 Restricted coil or dirty filter Clean amp advise customer of periodic cleaning amp maintenan
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