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1. FLAG TERMINAL LOW COOL x o SYSTEM SWITCH DIC DE ICE CONTROL LOW HEAT ojx INDOOR THERMOSTAT ETER PART NO REV HI HEAT o x H 617 581 17 02 44 MODELS ES12L33 A ES16L33 A EM18L34 A BLUE YELLOW THERMOSTAT SUPPLY SMOOTH OR BLACK CONDUCTOR 2 o 20 WIRING DIAGRAM COMPRESSOR TERMINAL ORIENTATION MAY VARY SYSTEM SWITCH 1 COMPRESSOR I L ALTERNATE COMPRESSOR OVERLOAD PROTECTOR COMPRESSOR WHITE BLUE ORANGE IBBED DR WHITE CONNECTOR ORANGE 4 RED GREEN YELLOW GREEN OR ONDUCTOR TO CAPACITOR BRACKET SCHEMATIC C MA 212 5 5 gt CAPACITUR BRAC TO CHASSIS CAPACITOR MEDIUM EN COOL 00 90 gt X0X0X HIGH HEAT X O X MEDIUM HEAT E x o x LOW HEAT ojx 01610161001 TO INNERWALL MOTOR MOUNT HEATER LEGEND 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 NO 619 405 16 02 45 MODEL EL25L35 A WIRING DIAGRAM BLUE COMPRESSOR TERMINAL O
2. D D D e i I Nit Do I D o i e 2 947590 dW3l WOIVHOdVA3 N e olo Duo io x KIX ejeje 213 NJN CI alain e e i io e ojo N i ojo N x NIN CI CI 641 CI CI N N njajo ON 0 N to N D 75990 dW3l NOLIVHOdVA3 Q0LH900S V S IIVC lA VSE 19814 V 96 I9C 13 98 0 19 1S V OETYEIS V 06 182 lS V 06 192 lS V 0 ILcINS V 0 ILZINM V 0 18LINS V 0 18 LWY V v 18LIN3 V 0 18 LINH V V 18LINA V 0 I7CVI V 0 IVCVIX V 06 l02HS V EETELSA V VOL160SA 8 01 160SA V 0V160SA 9 V 06 19159 8 0619 55 V 0 ISLHS 0612158 V 0 Ic LSM 01 19158 V 0 19159 V 0V ISLSM 0 12158 0112158 V OLIZLSM 8 0110 55 V 0 10159 V 0V 10LSM 9 0 16058 01 18055 V 0L1700A V IL 19003 V OLIELOX V 0L10L0X V 0L1800X V 0L1900X V 0L1900X viva 39NVINHOJH3d 10 COMPONENTS OPERATION amp T
3. 10000 11600 14500 12200 12000 17800 17600 20600 20200 23500 23000 115 115 115 230 208 230 208 230 208 230 208 eo 23 9 0 12 2 5 4 5 8 8 1 8 8 9 4 10 1 11 2 12 1 870 1055 1343 1220 1176 1780 1760 2081 2020 2479 2421 115 11 0 10 8 10 0 10 2 10 0 10 0 9 9 10 0 9 5 9 5 2 5 2 1 3 5 3 5 44 0 70 IC5 3 5 3 QUIETMASTER Heavy Duty models SL25L30 5128130 24600 24400 28000 27700 230 208 230 208 11 5 12 6 13 0 14 2 2536 2515 2947 2916 9 7 9 7 9 5 9 5 6 8 88 e e el e e SL36L30 SCO6H10D TWINTEMP Heat Pump 007110 509110 513133 18134 124135 36000 35700 6200 7200 9200 12700 12500 18000 18000 24000 24000 TWINTEMP Electric Heat 6000 7400 11000 10500 16800 16400 22000 21600 230 208 115 115 230 208 230 208 230 208 18 0 19 6 A gt 5 1 5 6 8 5 9 5 10 9 12 0 3913 3880 758 767 1149 1131 1895 1895 2400 2400 wlio 5 3 5 8 8 5 9 0 11 0 12 0 667 733 1185 1167 1867 1822 2444 2400 9 2 9 2 eo tn 12 0 11 0 11 0 9 5 9 5 10 0 10 0 11 0 rs gt m e x x elejieje je r zioioio e gt
4. MAY VARY REFER TO MARKING ON COMPRESSOR RED RED PURPLE BLACK SYSTEM SWITCH ALTERNATE E COMPRESSOR BLUE OVERLOAD LJ ANTICIPATOR PROTECTOR 3 RESISTOR BROWN i HARNESS hemmt 5 ROCKER MOLDED I LO HH switcH ce BLACK OR WHITE 9 OS CAPACITOR THERMOSTAT ORANGE BLUE BLACK CONDUCTOR SMOOTH OR BLACK 6 CHASSIS GREEN GREEN YELLUW GREEN YELLDW GREEN OR ID INNERWALL M 7 MOTOR MOUNT mi I 3 a m 12 CONDUCTOR HERM C SWITCH LOGIC LEGEN ANTICIPATOR RESISTOR SWITCH POSITION MONEY SAVER ROCKER SWITCH CAPACITOR COMPRESSOR GROUND LEAD LOW COOL FAN MOTOR COMBINATION TERMINAL OVERLOAD PROTECTOR PLASTIC INSULATOR MED COOL SYSTEM SWITCH FAN ONLY 01x101010 INDOOR THERMOSTAT mu 41 MODELS SL28L30 A COMPRESSOR TERMINAL WI R D RA M ORIENTATION MAY VARY REFER TO MARKING ON COMPRESSOR OVERLOAD PROTECTOR HARNESS COMPRESSOR MOLDED RESISTOR BLACK OR WHITE CONDUCTOR SUPPLY CORD GREEN OR GREEN YELLOW GREEN YELLOW GREEN OR TO INNERWALL 10 CAPACITDR MOTOR MOUNT RIBBED OR WHITE BRACKET CONDUCTOR ANTICIPATOR RESISTOR MONEY SAVER ROCKER SWITCH CAPACITOR COMPRESSOR GROUND LEAD FAN MOTOR COMBINATION TERMINAL OVERLOAD PROTECTOR P
5. and 1 C2 and 4 H and M S AR and 55 6 Med Heat Position between terminals C and 1 C2 and 4 M and M S and 5 7 Lo Cool Position between terminals C and 1 C2 and 4 LO and M S AR and 5 8 Fan Only Position between terminals 11 and Figure 17 System Control Switch 1 1 Heat Pump Electric Heat Models SMART CENTER ELECTRONIC CONTROL CENTER See Figure 18 CHECK FILTER light will come on after 250 hours of use Touch CHECK FILTER to reset Figure 18 Electronic Control QuieiMasier PROGRAMMABLE PM 7 m m lt Clock Filter Press to reset Power On off Mode Money Fan Cally Fan Speed Smart 1 4 Fan Timer Stop Start On Off smarr CENTER TESTING THE ELECTRONIC CONTROL XQ WS BOARDS amp QME BOARDS Checking Room Temperature 1 Check the room temperature at the electronic control pad by pressing the FAN SPEED button and the temperature button at the same time on XQ amp WS models 2 Check the room temperature at the electronic control pad by pressing at the same time the FAN SPEED button and the WARMER button on QME models The indoor temperature will display for 10 seconds Indoor temperature can be viewed in all modes including the TEST mode The display can be changed back
6. 12 Restart unit several times after allowing pressures to stabilize Pinch off process tubes cut and solder the ends Remove pinch off tool and leak check the process tube ends SPECIAL PROCEDURE IN THE CASE OF COMPRESSOR MOTOR BURNOUT 1 Recover all refrigerant and oil from the system 2 Remove compressor capillary tube and filter drier from the system 3 Flush evaporator condenser and all connecting tubing with dry nitrogen or equivalent to remove all contamination from system Inspect suction and discharge line for carbon deposits Remove and clean if necessary 4 Reassemble the system including new drier strainer and capillary tube 5 Proceed with processing as outlined under hermetic component replacement ROTARY COMPRESSOR SPECIAL TROUBLESHOOTING AND SERVICE Basically troubleshooting and servicing rotary compressors is the same as on the reciprocating compressor with only one main exception NEVER under any circumstances charge a rotary compressor through the LOW side Doing so would cause permanent damage to the new compressor 23 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 essent
7. This condition can be checked as follows 1 Install a piercing valve on the suction and discharge or liquid process tube 2 Attach gauges to the high and low sides of the system 3 Start the system and run a cooling or heating performance test If test shows A Below normal high side pressure B Above normal low side pressure C Low temperature difference across coil The compressor valves are faulty replace the compressor THERMAL OVERLOAD External Some compressors are equipped with an external overload which is located in the compressor terminal box adjacent to the compressor body See Figure 3 The overload is wired in series with the common motor terminal The overload senses both major amperage and compressor temperature High motor temperature or amperage heats the disc causing it to open and break the circuit to the common motor terminal Heat generated within the compressor shell is usually due to 1 High amperage 2 Low refrigerant charge 3 Frequent recycling 4 Dirty condenser TERMINAL OVERLOAD TEST Compressor External Type 1 Remove overload 2 Allow time for overload to reset before attempting to test 3 Apply ohmmeter probes to terminals on overload wires There should be continuity through the overload TERMINAL OVERLOAD Internal Some model compressors are equipped with an internal overload The overload is embedded in the motor windings to sense the winding temperature an
8. still displays after exiting Error Code Mode E3 FROST PROBE OPEN Normal operation is allowed Ohm frost probe Replace probe if ohm value not read If ohm value present replace board E4 FROST PROBE SHORT Normal operation allowed Replace probe E5 INDOOR PROBE OPEN Control assumes indoor ambient temperature is 90 degree F and unit will operate Ohm indoor probe Replace probe if ohm value not read E6 INDOOR PROBE SHORT Control assumes ambient temperature is 90 degree F and unit will operate Replace probe 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 degrees F INDOOR PROBE SENSOR Control range is 60 degrees F to 90 degrees F 2 degrees F Indoor temperature will be displayed by pressing QME units The Fan Speed button and the Warmer button XQ amp WS 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 re
9. m CAPACITOR gt BRACKET CAPACITOR IGREEN YELLOW TO INNERWALL MOTOR MOUNT GREEN OR CV 2 LI CV UI CAPACITOR BRACKET CHASSIS SCHEMATIC L1 MEDIUM Ah CLOSED LEGEND ANTICIPATOR RESISTOR MONEY SAVER CAPACITOR COMPRESSOR FAN MOTOR GROUND LEAD OVERLOAD PROTECTOR COMBINATION TERMINAL REVERSING VALVE PLASTIC INSULATOR INDOOR THERMOSTAT PART NO OUTDOOR THERMOSTAT 619 142 18 SWITCH LOGIC SWITCH POSITION 2 CLCCIC gt X gt X gt XX CC Oo xJ x lo Jo o o o 7 OFF LOW COOL MEDIUM COOL HIGH COOL HIGH HEAT MEDIUM HEAT LOW HEAT FAN ONLY xleelebebeleleL gt 191992364631 48 MODEL YS09L10 A YS09L10 B WIRING DIAGRAM THERMOSTAT YELLOW DEFROST THERMOSTAT SYSTEM REVERSING VALVE TERMINAL ORIENTATION 1 MAY VARY 1 REFER 1 MARKINGS ON RED _ 1 1 COMPRESSOR ALTERNATE COMPRESSOR WIRE HARNESS BLUE 19 OVERLOAD PROTECTOR ABE COMPRESSOR ANTICIPATOR RESISTOR SMOOTH OR BLACK CONDUCT
10. OR SUPPLY SMOOTH BLACK CORD CONDUCTOR ORANGE lt 4 RIBBED OR WHITE 2 RED REEN YELLOW REEN 6 TU INNERVALL MOTOR MOUNT CAPACITOR TO CAPACITOR BRACKET CAPACITOR BRACKET TU CHASSIS HEATER MEDIUM OVLD SWITCH LOGIC SWITCH POSTION ANTICIPATOR RESISTOR MONEY SAVER ROCKER SWITCH hy elo CAPACITOR COMPRESSOR TF THERMAL FUSE br LOW COOL x x MEDIUM COOL HIGH COOL OVERLOAD PROTECTOR e COMBINATION TERMINAL FAN MOTOR k GROUND LEAD HIGH HEAT MEDIUM BEAT HEAT 42 SYSTEM SWITCH PLASTIC INSULATOR LOW HET HEAT INDOOR THERMOSTAT 619 405 12 Dd 47 MODEL 07110 WIRING DIAGRAM COMPRESSOR TERMINAL ORIENTATION MAY VARY REFER TO SYSTEM 01 MARKINGS ON COMPRESSOR THERMOSTAT SWITCH REVERSING VALVE ALTERNATE i 1 2 COMPRESSOR COMPRESSOR N WIRE HARNESS OVE DEFROST THERMOSTAT YELLOW PROTECTOR WHITE BLACK BLUE ORANGE BROWN PURPLE PURPLE BLU BLACK OR WHIT ROCKER SW GE SMOOTH CONDUCTOR OR BROWN IBBED CONDUCTOR OR BLUE R 2 GREEN ji SA
11. as a low charge condition e 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 Outdoor Coil Gauges may equalize very slowly Partially Restricted System Accumulator Suction Pressure Indoor Coil Desp Vermin Outdoor Coil Compressor Gauges will not equalize with unit shut off Completely Restricted System 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 at least every 250 to 300 fan hours of operation or when 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 2 Theindoor 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 w
12. 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 II 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 smaller 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 Both ports of pilot open Piston needle on end of slide leaking Replace valve Raise head pressure operate solenoid If no shift use valve with smaller ports 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 va
13. 0 25 5512110 11800 90 1000 11 8 25 9514110 14000 120 1305 107 35 5512130 12100 11900 230 208 4 8 5 0 1052 1017 11 5 11 7 29 5516130 16200 15900 230 208 7 4 8 0 1653 1656 9 8 9 6 47 Moisture Room Side Net Removal Air Circulation Weight Pints Hr CFM Sleeve Lbs 11 0 12 11 5 14 10 8 19 10 0 3 2 3 2 5 0 5 5 74 1000 1198 lo Io em to SISIS ALalTs 5 2 e alata eo 8 114 16 737 alata ala w e e gt w e e eo SMI8L30 SM21L30 QUIETMASTER Deluxe 17800 17600 20600 20200 230 208 230 208 7 3 8 0 94 10 1 1618 1600 2081 2020 11 0 11 0 9 9 10 0 45 6 0 Amie als 8510110 RS12L10 8515110 RS16L30 RMI8L30 RM24L30 10200 11800 14500 16200 15900 17800 17600 23500 23000 115 115 115 230 208 230 208 230 208 23 9 0 12 2 7 4 8 0 8 1 8 8 11 2 12 1 872 1000 1343 1653 1656 1780 1760 2479 2421 117 118 10 8 9 8 9 6 10 0 10 0 9 5 9 5 25 25 3 5 47 44 70 3 6 3 QUIETMASTER 0110 2110 5110 2130 130 130 24130
14. PANEL Heat Pump amp Electric Heat Models See Figure 16 An eight position control switch is used to regulate the operation of the fan motor and compressor The compressor can be operated with the fan operating at low medium or high speed in the cooling or heating mode The fan motor can also be operated independently on medium speed See switch section as indicated on decorative control panel NOTE Heat pump models with electric heat in the heat position heating element only will be energized when outdoor temperature is below the operating range of the heat pump Figure 16 System Control Panel Heat Pump amp Electric Heat Models YS ES YM EM YL amp EL Twiniemp Fan Only Low Low Heat cu Cool Med Med Heat 9 Cool Hi e Cool Warmer Cooler Wait three minutes before restarting SYSTEM CONTROL SWITCH TEST See Figure 17 Disconnect leads from control switch Turn control to position being tested There must be continuity as follows 1 Position no continuity between terminals 2 Lo Cool Position between terminals C and 3 C2 and 2 LO and M S AR and 5 3 Med Cool Position between terminals C and 3 C2 and 2 and M S AR and 5 4 Hi Cool Position between terminals C and 3 C2 and 52 H and M S and 55 5 Heat Position between terminals
15. Strip Normal 5 5 KW Heat Strip Normal eth Digit Voltage 1 115 Volts 3 230 208 Volts 5th Digit Alphabetical Modifier 00001 Production Run Number Product Line R RAC P PTAC E EAC V H Split F 4 INSTRUCTIONS FOR USING COOLING LOAD ESTIMATE FORM FOR ROOM AIR CONDITIONERS AHAM PUB NO RAC 1 This cooling load estimate form is suitable for estimating the cooling load for comfort air conditioning installations which do not require specific conditions of inside temperature and humidity The form is based on an outside design temperature of 95 F dry bulb and 75 F wet bulb It can be used for areas in the continental United States having other outside design temperatures by applying a correction factor for the particular locality as determined from the map The form includes day factors for calculating cooling loads in rooms where daytime comfort is desired such as living rooms offices etc The numbers of the following paragraphs refer to the corresponding numbered item on the form 1 Multiply the square feet of window area for each exposure by the applicable factor The window area is the area of the wall opening in which the window is installed For windows shaded by inside shades or venetian blinds use the factor for Inside Shades For windows shaded by outside awnings or by both outside aw nings and inside shades or venetian blinds use the factor for Outside Awnings Single
16. m z m z rz w eo us n e L 008111 7700 4000 115 133 112 1290 10 5 e e 512133 516133 EM18L34 12100 11900 16200 15900 17800 17600 10700 8900 10700 8900 13000 10600 230 208 230 208 230 208 4 8 5 0 7 4 8 0 8 1 8 8 1052 1017 1653 1656 1780 1760 16 0 14 7 16 0 14 7 19 5 17 0 3500 2900 3500 2900 4200 3500 11 5 11 7 9 8 9 6 10 0 10 0 gt A 44 3 ole ele ze e e r e EL25L35 EL36L35 24600 24400 36000 35700 17300 14300 17300 14300 230 208 230 208 11 5 12 6 18 0 19 6 2536 2515 3913 3880 240 224 24 0 22 4 5500 4650 5500 4650 9 7 9 7 9 2 9 2 6 8 11 0 r e Sleeve dimensions listed on the following page The 007 and YS09 models operate on 115 volts and are not equipped with supplemental heat Both models will not provide heat at temperatures below 40 F Friedrich room air conditioners are designed to operate in outdoor temperatures from 50 F to 115 INSTALLATION INFORMATION SLEEVE DIMENSIONS Depth Depth Minimum Minimum Thru the wall with Hoodto Extension Extension Window Width Finished Hole Sleeve Height Width Front Louvers IntoRoom Outside Minimum Maximum Height Width Q 14 19 3 4 21 3 8 8 1 2 51 2 10 3 4 26 42 14 3
17. the cooling check valve forcing the heating check valve shut The liquid refrigerant is directed into the liquid dryer after which the refrigerant is metered through cooling capillary tubes to evaporator Note liquid refrigerant will also be directed through the heating capillary tubes in a continuous loop during the cooling mode HEATING MODE In the heating mode of operation liquid refrigerant from the indoor coil enters the heating check valve forcing the cooling check valve shut The liquid refrigerant is directed into the liquid dryer after which the refrigerant is metered through the heating capillary tubes to outdoor coils Note liquid refrigerant will also be directed through the cooling capillary tubes in a continuous loop during the heating mode HEAT PUMPS REVERSING VALVE See Figure 27 A reversing valve is used to change the refrigerant flow within the system to permit heating or cooling The reversing valve consists of a main valve body which houses the slide and piston plus a pilot valve which is activated by a solenoid There are three tubes connected to one side of the main valve body and one tube on the opposite side The single tube is connected to the compressor discharge line The center tube on the opposite side is the common suction line to the compressor The outside tubes are connected to the indoor and outdoor coils The pivot valve is responsible for directing the refrigerant flow to the indoor or out
18. to the evaporator The evaporator in a partial restriction could be partially frosted or have an ice ball close to the entrance of the metering device Frost may continue on the suction line back to the compressor Often a partial restriction of any type can be found by feel as there is a temperature difference from one side of the restriction to the other With a complete restriction there will be no sound at the metering device entrance An amperage check of the compressor with a partial restriction may show normal current when compared to the unit specification With a complete restriction the current drawn may be considerably less than normal as the compressor is running in a deep vacuum no load Much of the area of the condenser will be relatively cool since most or all of the liquid refrigerant will be stored there The following conditions are based primarily on a system in the cooling mode Accumulator Suction Pressure Indoor Coil Lower Troubleshooting a restricted refrigerant system can be difficult The following procedures are the more common problems and solutions to these problems There are two types of refrigerant restrictions Partial restrictions and complete restrictions A partial restriction allows some of the refrigerant to circulate through the system With a complete restriction there is no circulation of refrigerant in the system e Restricted refrigerant systems display the same symptoms
19. valve Should the valve fail to shift from cooling to heating block the air flow through the outdoor coil and allow the discharge pressure to build in the system Then switch the system from heating to cooling If the valve is stuck in the heating position block the air flow through the indoor coil and allow discharge pressure to build in the system Then switch the system from heating to cooling Should the valve fail to shift in either position after increasing the discharge pressure replace the valve NOTE When brazing a reversing valve into the system it is of extreme importance that the temperature of the valve does not exceed 250 F at any time Wrap the reversing valve with a large rag saturated with water Re wet the rag and thoroughly cool the valve after each brazing operation of the four joints involved The wet rag around the reversing valve will eliminate conduction of heat to the valve body when brazing the line connection SOLENOID COIL Heat Pump Models Only See Figure 27 The solenoid coil is an electromagnetic type coil mounted on the reversing valve and is energized during the operation of the compressor in the heating cycle Should the reversing valve fail to shift during the heating cycle test the solenoid coil TO TEST 1 Disconnect power to unit 2 Disconnect coil leads 3 Attach probes of an ohmmeter to each coil lead and check for continuity NOTE Do not start unit with sole
20. 4 20 12 9 32 18 9 16 14 31 22 12 9 32 18 9 16 14 9 16 22 36 13 29 32 20 3 32 19 3 8 P4 14 31 22 23 5 8 22 1 16 5 15 15 16 25 15 16 27 3 8 8 3 4 3 1 16 16 15 16 27 1 8 42 16 3 16 263 16 17 15 16 25 15 16 2 3 8 8 3 4 3 1 16 16 15 16 27 7 8 42 18 3 16 263 16 20 3 16 28 33 5 8 16 1 2 3 3 16 18 15 16 29 7 8 42 20 3 8 281 4 10 13 16 14 11 16 21 9 7 8 21 2 15 1 2 14 3 4 17 7 8 11 1 8 1415 16 20 1 2 14 1 2 23 11 5 1 4 17 3 4 15 1 2 SV fits windows a minimum of 21 H and a maximum of 40 1 2 H CIRCUIT RATING BREAKER Circuit Rating Plug Face Appearance Breaker or T D Fuse NEMA Facing Blades ALL SV CP XQ and ZQ MODELS 510110 512110 KS15L10 RS10L10 RS12L10 RS15L10 5508110 5509110 5510110 5512110 5514110 8606 100 008111 007110 509110 512130 KM18L30 21130 8516130 RM18L30 5512130 5516130 SM18L30 5 21130 250 15 KM24L30 RM24L30 5125130 SL28L30 121 33 ES16L33 YS13L33 250V 20A 5136130 EM18L34 EL25L35 EL36L35 YM18L34 YL24L35 125V 15A 250V 30A Optional 30 Amp Kit 618 869 00 is recommended in 208 Volt power supply areas that fall below 208 Volts For more information call the Friedrich Service Department Wire Size Use ONLY wiring size recommended for single outlet branch circuit Fuse Circuit Use ONLY type and size fuse or HA
21. CI N 1 1 1 1 184 184 99c 664 664 6 C 99C 6 C 6 C 89C 89C 184 892 820 824 992 992 992 eve 1444 8vc CI CI CI CI CI NIN N CI i N e o 9 C 184 L92 957 e M M e CI N o SNILVH3dO o njn lt e N lt C e e M 2 qns e N CI N olo ES CI N o N 9 e o o o e o e e CI CI N e CI 62 99 uonong 23 o N 5 9 5930 3univsadwal WH3SN3Q0NOD e e o 2 D ojojo t D o I ojo
22. CR Breaker circuit breaker indicated on unit s rating plate VAN CAUTION Proper current protection to the unit is the responsibility of the owner ELECTRIC SHOCK HAZARD Grounding Unit MUST be grounded from branch circuit through service cord to unit or through separate Turn off electric power before service or installation ground wire provigeoion permanently connected All electrical connections and wiring MUST be installed by units Be sure that branch circuit or general purpose outlet is grounded a qualified electrician and conform to the National Electrical Code and all local codes which have jurisdiction Receptacle 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 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 U thatthe AHAM Certification Seal accurately states the unit s cooling and heating capacity rating L C the amperes and the energy efficiency ratio CERTWED RATING AHAM PERFORMANCE DATA SL 0 06 06 0 02 02 SL SL SL SL SL SL 06 0c 02 o o N o A SL SL SL SL SL SL SL SL SL SL SL SL SL SL SL SL SL SL s
23. D TO UNCONDITIONED SPACE TOTAL LINEAR FEET OF WIDTH 9 SUBTOTAL 10 TOTAL COOLING LOAD BTU per hour to be used for selection of room air conditioner s Total in Item 9 X Factor from Map HEAT LOAD FORM The heat load form on the following page may be used by servicing personnel to determine the heatloss of a conditioned space and the ambient winter design temperatures in which the unit will heat the calculated space The upper half of the form is for computing the heat loss of the space to be conditioned It is necessary only to insert the proper measurements on the lines provided and multiply by the given factors then add this result for the total heat loss in BTU Hr F The BTU Hr per F temperature difference is the 70 F inside winter designed temperature minus the lowest outdoor ambient winter temperature of the area where the unit is installed This temperature difference is used as the multiplier when calculating the heat loss The graph shows the following Left Hand Scale Unit capacity BTU Hr or heat loss BTU Hr Bottom Scale Outdoor ambient temperature base point Heat Pump Model BTU Hr capacity heat pump will deliver at outdoor temperatures Balance Point Maximum BTU Hr heat pump will deliver at indicated ambient temperature Following is an example using the heat load form A space to be conditioned is part of a house geographically located in an area where the lowest outdoor amb
24. EEN OR GREEN YELL Z CAPACITOR BRACKET RIBBED OR WHITE CONDUCTOR SWITCH LOGIC CORPO LEGEND ANTICIPATOR RESISTOR MONEY SAVER ROCKER SWITCH CAPACITOR COMPRESSOR GROUND LEAD FAN MOTOR COMBINATION TERMINAL OVERLOAD PROTECTOR Q PLASTIC INSULATOR SYSTEM SWITCH INDOOR THERMOSTAT PART NO REV aa Ed 39 MODELS 5510110 SS12L10 A B SS12L30 A B SS14L10 A B 5516130 SM18L30 A B SM21L30 A B COME NATUR COMPRESSOR ORIENTATION WI R N D MAY VARY REFER TO e MARKINGS ON COMPRESSOR RED BLACK OVERLOAD ALTERNATE PROTECTOR COMPRESSOR COMPRESSOR HARNESS SMOOTH OR BLACK CONDUCTOR ELECTRONIC CONTROL GREEN YELLOW GREEN DR CAPACITOR RED 2 0 BLUE TO CAPACITOR BRACKET GREEN OR GREEN YELLOWf FAN INNERWALL MOTOR MOTOR MOUNT TO CAPACITOR BRACKET RIBBED OR WHITE CONDUCTOR I TU CHASSIS SCHEMATIC NEUTRAL 115 V L2 230 208 L1 SWITCH LOGIC X CLOSED LEGEND 0 OPEN SWITCH POSITION CIRCUIT 314 15 CAPACITOR 2 COMPRESSOR 0 X FAN MOTOR COMBINATION TERMINAL OVERLOAD PROTECTOR GROUND LEAD PART NO REV 619 405 06 02 COOL COOL 40 MODELS SL25L30 A SL36L30 A TERMINAL WI RI NG DIAG RAM
25. ESTING WARNING DISCONNECT ELECTRICAL POWER TO UNIT BEFORE SERVICING OR TESTING COMPRESSORS Compressors are single phase 115 or 230 208 volt depending on the model unit All compressor motors are permanent split capacitor type using only a running capacitor across the start and run terminal All compressors are internally spring mounted and externally mounted on rubber isolators WINDING TEST Remove compressor terminal box cover and disconnect wires from terminals Using an ohmmeter check continuity across the following See Figure 1 1 Terminal S no continuity open winding replace compressor 2 Terminal and R no continuity open winding replace compressor 3 Terminal R and 5 no continuity open winding replace compressor Figure 1 OHMMETER ROTARY COMPRESSOR TOP VIEW GROUND TEST Use an ohmmeter set on its highest scale Touch one lead to the compressor body clean point of contact as a good connection is a must and the other probe in turn to each compressor terminal see Figure 2 If a reading is obtained the compressor is grounded and must be replaced OHMMETER Figure 2 Typical Ground Test ROTARY COMPRESSOR TOP VIEW CHECKING COMPRESSOR EFFICIENCY The reason for compressor inefficiency is normally due to broken or damaged suction and or discharge valves reducing the ability of the compressor to pump refrigerant gas
26. Glass includes all types of single thickness windows and Double Glass includes sealed airspace types storm windows and glass block Only one number should be entered in the right hand column for Item 1 and this number should represent only the exposure with the largest load 2 Multiply the total square feet of all windows in the room by the applicable factor 3a Multiply the total length linear feet of all walls exposed to the outside by the applicable factor Doors should be considered as being part of the wall Outside walls facing due north should be calculated separately from outside walls facing other directions Walls which are permanently shaded by adjacent structures should be considered North Exposure Do not consider trees and shrubbery as providing permanent shading An uninsulated frame wall or a masonry wall 8 inches or less in thickness is considered Light Construction An insulated wall or masonry wall over 8 inches in thickness is considered Heavy Construction 3b Multiply the total length linear feet of all inside walls between the space to be conditioned and any uncondi tioned spaces by the given factor Do not include inside walls which separate other air conditioned rooms 4 Multiply the total square feet of roof or ceiling area by the factor given for the type of construction most nearly describing the particular application use one line only 5 Multiply the total square feet of floor area by the factor gi
27. LASTIC INSULATOR SYSTEM SWITCH INDOOR THERMOSTAT PART NO REV 619 405 01 42 MODELS SL36L30 B WIRING DIAGRAM HARNESS COMPRESSOR ANTICIPATOR RESISTOR I SWITCH SUPPLY CORD SMOOTH OR BLACK CONDUCTOR MOTOR WIRE HARNESS TO CAPACITOR BRACKET CAPACITOR 6 WAY MULTI TO CAPACITOR PIN CONNECTOR BRACKET TO INNERWALL CHASSIS MOTOR MOUNT RIBBED OR WHITE CONDUCTOR SCHEMATIC ANTICIPATOR RESISTOR MONEY SAVER ROCKER SWITCH CAPACITOR COMPRESSOR i GROUND LEAD OE FAN MOTOR COMBINATION TERMINAL OVERLOAD PROTECTOR PLASTIC INSULATOR MED COOL X ojo pco SYSTEM SWITCH 8 INDOOR THERMOSTAT PART NO HARD START KIT 619 142 13 43 MODEL EQ08L11 A WIRING DIAGRAM COMPRESSOR DE ICE CONTROL SWITCH SYSTEM NOTE OPTIONAL CONFIGURATION SMOOTH OR BLACK CONDUCTOR RED OR BLUE SUPPLY CORD RIBBED OR WHITE CONDUCTOR THERMOSTAT _ _ gt BLACK CAPACITOR RED OR BLUE TO CAPACITOR BRACKET HEATER SCHEMATIC HTR 22 FAN CAP X C SWITCH LOGIC 0 0 SWITCH POSITION CIRCUI 112 LEGEND HEATER LIMIT TF THERMAL FUSE CAPACITOR OFF 010 COMPRESSOR INSULATED TERMINAL 3 4 GROUND LEAD FAN ololx FAN MOTOR LI C00L X X OVERLOAD PROTECTOR 9 COMBINATION TERMINAL 0 0
28. LY BE ATTEMPTED BY QUALIFIED SERVICE PERSONNEL 24 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 itis an indication of a low refrigerant charge A check of the amperage drawn by the compressor motor should show a lower reading Check the Unit Specification After the unit has run 10 to 15 minutes check the gauge pressures Gauges connected to system with an undercharge will have low head pressures and substantially low suction pressures Accumulator Suction Pressure Much Lower Indoor Coil Head Pressure Outdo
29. NDUCTOR RED gt GREEN YELLOW TO INNERWALL 1 GREEN OR MOTOR MOUNT R 2 a a zi LI GREEN CAPACITOR BRACKET c z c a TO CAPACITOR 50 BRACKET TO CHASSIS MEDIUM CLOSED OPEN 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 619 405 15 02 MODELS YL24L35 A WIRING DIAGRAM COMPRESSOR TERMINAL ORIENTATION MAY VARY REFER TO MARKINGS ON EET 1 55 COMPRESSOR WIRE HARNESS E OVERLOAD DEFROST PROTECTOR THERMOSTAT VHITE BLACK BLUE ORANGE ANTICIPATOR RESISTOR SMOOTH OR BLACK CONDUCTOR SUPPLY IGREEN YELLOW TO INNERWALL GREEN OR MOTOR MOUNT P BRACKET 2 CAPACITOR TO CAPACITOR HEATER BRACKET TO CHASSIS MEDIUM LEGEND ANTICIPATOR RESISTOR HEATER MONEY SAVER HEATER LIMIT ere od THERMAL FUSE MOTOR GROUND LEAD OVERLOAD COMBINATION TERMINAL REVERSING VALVE PLASTIC INSULATOR INDOOR THERMOSTAT OUTDOOR THERMOSTAT 61 IC QS 51 AEN m rriedrich Friedrich Air Conditioning Co Post Office Box 1540 San Antonio Texas 78295 1540 4200 N Pan Am Expressway San An
30. OR R gt m l REEN GREEN TO CAPACITOR L BRACKET TO PURPLE BLACK OR WHITE ROCKER SWITCH I GE RED N RED IBBED OR WHITE CONDUCTOR om GREEN gt BROWN TO_CAPACITOR BLACK BLUE DRANGE MOTOR BRUWN RED lt CONNECTOR GREEN YELLOW dem OR BRACKET CHASSIS CAPACITOR MEDIUM TO INNERWALL MOTOR MOUNT X CLOSED SWITCH LOGIC SWITCH POSITION CIRCUT 1 1 1 2 53 456789119 or Tolololololololololo Low cooL o ololxi x o x o x o MEDIUM COOL HIGH COOL 0 XI 0 CIXI0CIXIC x o x LEGEND ANTICIPATOR RESISTOR MONEY SAVER 4 m CAPACITOR COMPRESSOR FAN MOTOR OVERLOAD PROTECTOR REVERSING VALVE INDOOR THERMOSTAT OUTDOOR THERMOSTAT GROUND LEAD COMBINATION TERMINAL PLASTIC INSULATOR PART NO 619 405 17 49 MODELS YS13L33 A YM18L34 A COMPRESSOR TERMINAL ORIENTATION MAY VARY REFER TO MARKINGS ON SYSTEM RED conPressoe ALTERNATE COMPRESSOR WIRE HARNESS BLUE OVERLOAD DEFROST PROTECTOR COMPRESSOR THERMOSTAT WHITE 7 BLACK ORANGE BLUE 17 ORANGE 1 E BLACK BROWN p RED I BLACK WHITE ANTICIPATOR RESISTOR SMOOTH OR BLACK CONDUCTOR ORANGE TR IBBED OR WHITE CO
31. OTOR PART NO 614 406 00 02 37 MODELS XQ05L10 A B XQ06L10 A B C D XQ08L10 A B XQ10L10 A B XQ12L10 A B COMPRESSOR ELECTRONIC CONTROL TU MAY VARY REFER TO MARKINGS ON COMPRESSOR OVERLOAD PROTECTOR COMPRESSOR y HARNESS CONDUCTOR SUPPLY CORD GREEN YELLOW CAPACITOR TO CAPACITOR BRACKET RIBBED OR WHITE CONDUCTOR TO CAPACITOR BRACKET TO INNERWALL TO CHASSIS MOTOR MOUNT SCHEMATIC NEUTRAL 115 V L1 0 5 ELECTRONIC CONTROL X CLOSED SWITCH LOGIC X 00 SWITCH POSITION CIRCUIT CAP CAPACITOR OFF COMER c COMPRESSOR COMBINATION TERMINAL HI COOL MTR FAN MOTOR l GROUND LEAD MED COOL OVLD OVERLOAD PROTECTOR LOW COOL PART NO 619 142 14 38 MODELS KS10L10 A RS10L10 A KS12L10 A KS12L30 A KS15L10 A RS15L10 A RS16L30 A RM18L30 A KM18L30 A KM21L30 A RM24L30 A KM24L30 A COMPRESSOR COMPRESSOR ORIENTATION WIRING DIAGRAM MAY VARY 1 REFER TO ey Um MARKINGS ON COMPRESSOR PURPLE OVERLOAD ALTERNATE SWITCH PROTECTOR COMPRESSOR L SYSTEM BLUE COMPRESSOR WIRE HARNESS BLACK DR WHITE RESISTOR CAPACITOR RED BLACK CONDUCTOR CAPACITOR C gt SUPPLY CORD 5515 UR GREEN YELLOW FAN INNERVALL MOTOR MOTOR MOUNT GR
32. RIENTATION MAY VARY YELLOW REFER TO MARKINGS ON RED COMPRESSOR l ALTERNATE I COMPRESSOR NWRE HARNESS em OVERLOAD PROTECTOR COMPRESSOR WHITE BLACK 2 BLUE DRANGE MOTOR BRLIWN YELLUW YELLOW THERMOSTAT ORANGE ORANGE PURPLE ANTICIPATOR RESISTOR SMOOTH OR BLACK CONDUCTOR SUPPLY CORD ORANGE RIBBED OR WHITE om RED ONDUCTOR GREEN GREEN YELLOW TO INNERWALL MOTOR MOUNT SREE TO_CAPACITOR BROWN TO CAPACITOR BRACKET CAPACITOR BRACKET TO CHASSIS MEDIUM OVLD ANTICIPATOR RESISTOR HTR HEATER MONEY SAVER ROCKER SWITCH HL HEATER LIMIT CAPACITOR THERMAL FUSE olololo LOW COOL COMPRESSOR MEDIUM COOL 012 FAN MOTOR GROUND LEAD HeH coo XI 0CIXICIXI0 IX OVERLOAD PROTECTOR COMBINATION TERMINAL SYSTEM SWITCH PLASTIC INSULATOR MEDIUM HEAT INDOOR THERMOSTAT PART NO J FAN ONLY 619 405 02 02 46 MODEL EL36L35 A WIRING DIAGRAM RED Rae A EE M BLUE TAL T COMPRESSOR TERMINAL ORIENTATION YELLOW MAY VARY I MARKINGS ON RED COMPRESSOR I SYSTEM SWITCH L ALTERNATE YELLUW COMPRESSOR WIRE HARNESS YELLOW THERMOSTAT ORANGE OVERLOAD PROTECTOR COMPRESSOR WHITE BLACK BLUE FAN BROWN
33. VALVE See Figure 26 A unique two way check valve is used on the reverse cycle heat pumps It is pressure operated and used to direct the flow of refrigerant through a single filter drier and to the proper capillary tube during either the heating or cooling cycle Figure 26 One way Check Valve Heat Pump Models 7 T o Xx NOTE The slide check inside the valve is made of teflon Should it become necessary to replace the check valve place a wet cloth around the valve to prevent overheating during the brazing operation CHECK VALVE OPERATION In the cooling mode of operation high pressure liquid enters the check valve forcing the slide to close the opposite port liquid line to the indoor coil Refer to refrigerant flow chart This directs the refrigerant through the filter drier and cooling capillary tube to the indoor coil In the heating mode of operation high pressure refrigerant enters the check valve from the opposite direction closing the port liquid line to the outdoor coil The flow path of the refrigerant is then through the filter drier and heating capillary to the outdoor coil Failure of the slide in the check valve to seat properly in either mode of operation will cause flooding of the cooling coil This is due to the refrigerant bypassing the heating or cooling capillary tube and entering the liquid line COOLING MODE In the cooling mode of operation liquid refrigerant from con denser liquid line enters
34. 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 AIC 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 IMPORTANT Error Codes are cleared from the log by exiting from Error Code Mode To exit on XQ amp WS models press Timer On Off button To exit QME models press A C Start and On Off buttons Or un plug 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 Defined as compressor powered on before the three minute time delay ten times in one hour Investigate and correct 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 Replace board if E2
35. ater 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 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 3 Periodically at least yearly or bi yearly inspect all control components both electrical and 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 4 Inspect the surrounding area inside and outside to ensure that the units clearances have not been compromised altered 5 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 wate
36. d hot condenser Check amperage Possible Cause Action Low or fluctuating voltage T stat does not turn unit on Problem Place jumper across t stat terminals to check if unit operates If unit operates replace t stat Loose or broken parts in t stat Check as above Refer to appropriate wiring diagram Loss of charge in t stat bulb Possible Cause Action Noisy operation Problem 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 Improperly mounted or loose Check assembly amp parts for looseness cabinet parts rubbing amp rattling Poorly installed Water leaks into the room Possible Cause Action Evaporator drain pan overflowing Clean obstructed drain trough Condensation forming on base pan Evaporator drain pan broken or cracked Reseal or replace Poor installation resulting in rain Check installation instructions Reseal as entering the room required Condensation on discharge grille Clean the dirty evaporator coil Use pressure louvers wash or biodegradable cleaning agent to clean Chassis gasket not installed Install gasket per Installation manual Downward slope of unit is too Refer to installation manual for proper steep installation Problem Possible Cause Action Water spitting int
37. d or current draw The overload is connected in series with the common motor terminal Should the internal temperature and or current draw become excessive the contacts in the overload will open turning off the compressor The overload will automatically reset but may require several hours before the heat is dissipated Figure 3 External Overload OVERLOAD CHECKING THE INTERNAL OVERLOAD See Figure 4 LINE BREAK Figure 4 INTERNAL OVERLOAD Internal Overload OHMMETER 1 With no power to unit remove the leads from the compressor terminals 2 Using an ohmmeter test continuity between terminals 5 and C R If no continuity the compressor over load is open and the compressor must be replaced FAN MOTOR single phase permanent split capacitor motor is used to drive the evaporator blower and condenser fan A self resetting overload is located inside the motor to protect against high temperature and high amperage conditions See Figure 5 FAN MOTOR TEST 1 Determine that capacitor is serviceable 2 Disconnect fan motor wires from fan speed switch or system switch 3 Apply live test cord probes on black wire and common terminal of capacitor Motor should run at high speed 4 Apply live test cord probes on red wire and common terminal of capacitor Motor should run at low speed 5 Apply live test cord probes on each of the remaining wires from the speed switch or system switch to te
38. d to check thermostat Refer to the troubleshooting section in this manual for additional information on thermostat testing THERMOSTAT ADJUSTMENT No attempt should be made to adjust thermostat Due to the sensitivity of the internal mechanism and the sophisticated equipment required to check the calibration itis suggested that the thermostat be replaced rather than calibrated Thermostat bulb must be straight to insure proper performance Figure 20 Thermostat THERMOSTAT BULB LOCATION The position of the bulb is important in order for the thermostat to function properly The bulb of the thermostat should be located approximately 45 to a maximum of 60 from horizontal Also do not allow the thermostat bulb to touch the evaporator coil See Figures 20 and 21 Figure 21 Thermostat Bulb Location EQ YQ amp SC Models Thermostat sensor holder 020 to be positioned between the 4th and 5th and 6th and 7th rows of tubes from the bottom of the coil at dimension shown Basepan top edge 7 500 Vy 1 500 DEFROST THERMOSTAT Heat Pump Models Only See Figure 22 This thermostat is single pole double throw with contacts between terminals 2 and 3 closing on temperature rise and contacts between terminals 2 and 1 closing on temperature fall When the contacts between terminals 2 and 1 make power is supplied to the heater element This control is dual purpos
39. derstanding 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 always flows from a warmer body to a cooler body 2 Heat must be added to or removed from a substance before a change in state can occur 3 Flow is always from a higher pressure area to a lower pressure area 4 The temperature at which a liquid or gas changes state is dependent upon the pressure The refrigeration cycle begins at the compressor Starting the compressor creates a low pressure in the suction line which draws refrigerant gas vapor into the compressor The compressor then compresses this refrigerant raising its pressure and its heat intensity Temperature The refrigerant leaves the compressor through the discharge line as a hot high pressure gas vapor The refrigerant enters the condenser coil where it gives up some of its heat The condenser fan moving air across the coil s finned surface facilitates the transfer of heat from the refrigerant to the relatively cooler outdoor air When a sufficient quantity of heat has been removed from the refrigerant gas vapor the refrigerant will condense i e change to a liquid Once the refrigerant has been condensed changed to a liquid it is cooled even further by the ai
40. door coil There are three small tubes connected to the pilot valve body The center pilot tube is the common pilot tube and is connected to the center suction line The outside tubes are connected to each end of the main valve body The pilot valve consists of a needle valve and spring When the solenoid is de energized the spring tension closes one pilot port while the other remains open When the solenoid is energized the opposite end is closed The piston in the main valve is pressure operated and will always travel in the direction of the open pilot tube port which provides a path to the center tube Pressure which will increase in the opposite side of the valve will escape through a bleed port located in each piston When de energized the valve will be in the cooling position Figure 27 Reversing Valve TESTING REVERSING VALVE Occasionally the reversing valve may stick in the heating or cooling position or in the mid position When stuck in the mid position part of the discharge gas from the compressor is directed back to the suction side resulting in excessively high suction pressure Check the operation of the valve by starting the system and switching the operation from Cooling to Heating and then back to Cooling Do not hammer on valve 20 If valve fails to change its position test the voltage to the valve coil while the system is in the heating cycle If voltage to coil is satisfactory replace reversing
41. duy 09 asna OOLL OOLL OOLL OOLL OOLL OOLL OOLL OOLL 0201 0 0 0201 OOLL OOLL OOLL OZOL 0 0 0201 0201 0 0 0201 0 0 0201 0 0 0201 0801 0801 0801 0801 0801 0801 ESL 061 088 911 9 2 ely ely 96 96 96 96 96 8 7 8 7 186 60 60 60 09 o i i e N 9 443 Ove 806 voc voc vee vee 814 9 C V9C 112 90 094 022 481 881 111 voc 074 Gly 976 918 Vos 069 09 osy 6 96C 966 oer oes oes 066 0 00 L92 L 92 9 026 082 026 882 082 OLE 264 064 064 026 006 494 0796 092 092 812 02 861 0 02 OLE 6 L 22 eet ZO ul 089 016 0789 0789 0789 oer oer 07 ozy 0CV ozy 0789 0789 Ove 0756 01 ose 0756 01 0 2 019 ozy ozy ozy 296 296 296 099 0 2 082 sduy 40304 9VC 2C LL 02 92 681 98 18 L9L C9 VSL VSL 99 ZOL H sduy Een o oo co M 2 d I d Ecl 7 3 eU ojo M 081 Su 211 8 28 98 222 TS M N M N o 09 1002 sduy SONILVY 1VOTHIO3 13 164 294 208 82 82 184 684 844 726 ble N
42. e control that acts as an outdoor thermostat and defrost control When the sensing bulb attached to the condenser coil senses enough icing on the outdoor coil it will interrupt power to the compressor and supply power to the heating element until the coil temperature reaches above 43 then the heater will shut off and the unit will resume operating in the reverse cycle mode When the outdoor coil temperature drops below 207 the unit will operate in electric heat mode continuously until the outdoor coil temperature rises above 43 The fan motor will not turn off when defrost occurs and the 4 way valve will not reverse Figure 22 Defrost Thermostat Heat Pump Models DEFROST BULB LOCATION Heat Pump Models Only See Figure 23 The defrost control bulb must be mounted securely and in the correct location to operate properly Figure 23 Defrost Thermostat Bulb Location All Heat Pump Models Retainer Slide the bulb end of the thermostat defrost under the retainer as shown RESISTOR Heat Anticipator See Figure 24 Failure of the resistor will cause prolonged and cycles of the unit When replacing a resistor be sure and use the exact replacement Resistor ratings are as follows 115 Volt 5 000 ohms 3 watt 230 Volt 20 000 ohms 3 watt Figure 24 Resistor CAPACITOR RUN See Figure 25 A run capacitor is wired across the auxiliary and main wind ing of a single phase permanent
43. eaker 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 System switch in OFF position Set switch correctly Inoperative system switch Test for continuity in each switch position Loose or disconnected wiring at Check wiring amp connections Reconnect per switch or other components wiring diagram Evaporator coil freezes up Problem Possible Cause Action Dirty filter Clean as recommended in Owner s Manual Check for dirty or obstructed coil Use Restricted airflow pressure wash or biodegradable cleaning agent to clean Inoperative t stat Test for shorted t stat or stuck contacts 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 Possible Cause Action Compressor runs continually amp does not cycle off Problem Unit undersized Test cooling performance amp replace with larger unit if needed _ NS Check for partially iced coil amp check Restriction in line temperature 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 Chec
44. erheat 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 Installa 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 Weigh refrigerant with the property quantity of R 22 refrigerant N Start unit and verify performance 8 Crimp the process tube and solder the end shut NOTE In order to access the sealed system it will be necessary to install Schrader type fittings to the process tubes on the discharge and suction of the compressor Proper refrigerant recovery procedures need to be adhered to as outlined in EPA Regulations THIS SHOULD ON
45. fer to appropriate wiring diagram Defrost control timer motor not Check for voltage at TM amp TM1 on timer If advancing applicable models no 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 models If contacts remain closed between terminals 2 amp 3 of the defrost control after preselected time interval has passed replace control Defrost control bulb removed from Reinstall amp be assured that good bulb to coil or not making good coil contact contact is made Possible Cause Action Defrost control contacts stuck Does not heat adequately 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 T stat should close at 38F Check continuity of control If temperature is below 38F replace control Outdoor t stat open applicable models Heater hi limit control evelina amp Check for adequate fan air across heater yelng Check control for open at 160F amp close at m 150F Shorted supplementary heater Ohmmeter check approx 32 35 ohms Possible Cause Refer to a
46. g section of this manual THERMOSTAT Models ES YS EM YM EL YL See Figure 20 A cross ambient thermostat is used on all heat pump and electric heat units In addition to cycling the unit in a heating or cooling operation the thermostat will terminate the cooling cycle in the event ice forms on the evaporator coil in this case the thermostat functions as a de ice control A resistor anticipator is positioned within a plastic block to supply a small amount of heat to the bulb area to prevent long off cycles in the Cool Fan Auto MoneySaver position A current feedback through the fan motor windings during off cycle completes the circuit to the resistor In the heating cycle the heat anticipator is energized to supply a small amount of heat during the on cycle This will open the contacts in the thermostat prematurely to maintain a closer differential between the cut in and cut out temperature The heat anticipator is energized in the heating mode regardless of whether fan is placed in the automatic MoneySaver or constant run position RANGE Thermostat Properties 60 F 2 to 92 F 829 TEST Cooling Heating Models Remove wires from thermostat and check continuity between terminal 2 common and 3 for cooling Check between terminals 2 common and 1 for heating Also check that contacts in thermostat open after placing in either position NOTE Temperature must be within range liste
47. ial to proper unit operation Operating a unit with an improper refrigerant charge will result in reduced performance capacity and or efficiency Accordingly the use of proper charging methods during servicing will insure that the unit is functioning as designed and that its compressor will not be damaged Too much refrigerant overcharge in the system is just as bad if not worse than not enough refrigerant undercharge They both can be the source of certain compressor failures if they remain uncorrected for any period of time Quite often other problems such as low air flow across evaporator etc are misdiagnosed as refrigerant charge problems The refrigerant circuit diagnosis chart will assist you in properly diagnosing these systems An overcharged unit will at times return liquid refrigerant slugging back to the suction side of the compressor eventually causing a mechanical failure within the compressor This mechanical failure can manifest itself as valve failure bearing failure and or other mechanical failure The specific type of failure will be influenced by the amount of liquid being returned and the length of time the slugging continues Not enough refrigerant Undercharge on the other hand will cause the temperature of the suction gas to increase to the point where it does not provide sufficient cooling for the compressor motor When this occurs the motor winding temperature will increase causing the motor to ov
48. ient winter temperature is 40 F The calculated heat loss is 184 BTU Hr F Subtract 40 F lowest outdoor ambient temperature for the geographical location from 70 F inside design temperature of the unit for a difference of 30 F Multiply 184 by 30 fora 5500 BTU Hr total heat loss for the calculated space On the graph plot the base point 70 and a point on the 40 F line where it intersects with the 5500 BTU Hr line on the left scale Draw a straight line from the base point 70 through the point plotted at 40 F This is the total heat loss line Knowing that we have a 5500 BTU Hr heat loss and we expect that our heat pump will maintain a 70 F inside temperature at 40 F outdoor ambient we plot the selected unit capacity BTU Hr of the unit between 35 and 60 on the graph and draw a straight line between these points Where the total heat loss line and the unit capacity line intersect read down to the outdoor ambient temperature scale and find that this unit will deliver the required BTU Hr capacity to approximately 30 F HEATING LOAD FORM FRIEDRICH ROOM UNIT HEAT PUMPS BTU HR PER WALLS Linear Feet F TEMP DIFFERENCE 2 Insulation Lin Ft x 1 6 Average Lin Ft x 2 6 WINDOWS amp DOORS Area sq ft Single Glass Sq Ft x 1 13 Double Glass Sq Ft x 0 61 INFILTRATION WINDOWS amp DOORS AVG Lin Ft x 1 0 Loose Lin Ft x 2 0 CEILING Area Sq Ft Insulated 6 Ft x 0 07 In
49. k operation of t stat Replace if contacts remain closed T stat incorrectly wired Refer to appropriate wiring diagram Possible Cause Action Excessive heat load T stat does not turn unit off Disconnect power to unit Remove cover T stat contacts stuck of t stat amp check if contacts are stuck If so replace t stat 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 31 32 Problem Possible Cause Action Compressor runs for short periods only Cycles on overload Problem Overload inoperative Opens too Check operation of unit Replace overload if Soon system operation is satisfactory Allow a minimum of 2 minutes to allow pressures to equalize before attempting to restart Instruct customer of waiting period Compressor restarted before system pressures equalized Check voltage with unit operating Check for other appliances on circuit Air conditioner should be in separate circuit for proper voltage amp fused separately 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 Check for proper fan speed or blocked condenser coil condenser Compressor running abnormally Check for kinked discharge line or restricte
50. lve 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 deenergized If valve shifts reattempt with compressor running If it still will not reverse while running replace the valve Defective pilot Replace valve Defective compressor Replace compressor 29 30 COOLING ONLY ROOM AIR CONDITIONERS TROUBLESHOOTING TIPS Problem Possible Cause Action Check voltage at compressor 115V amp 230V gt units will operate at 10 voltage variance T stat not set cold enough or inop Set t stat to coldest position Test t stat amp re erative place if inoperative Compressor hums but cuts off on Hard start compressor Direct test compressor B10overload If compressor starts add starting components Compressor 6 honed ind does not run Check for continuity amp resistance Open overload Test overload protector amp replace if inoperative Open capacitor Test capacitor amp replace if inoperative Test for c
51. ly will be much less satisfactory than one which is slightly undersized and which would operate more nearly continuously Intermittent loads such as kitchen and laundry equipment are not included in this form COOLING LOAD ESTIMATE FORM HEAT GAIN FROM QUANTITY FACTORS BTU Hr DAY Quantity x Factor No Inside Outside Area WINDOWS Heat gain from the sun Shades Shades Awnings X Factor Northeast East These factors are for single glass a an Southeast only For glass block multiply the 75 30 20 the South above factors by 0 5 for double 9d glass or storm windows multiply the 75 35 20 _ __ largest Southwest above factors by 0 8 110 45 30 load West 150 65 45 Use Northwest 120 50 35 only North 0 one WINDOWS Heat by conduction Total of all windows Single glass Double glass or glass block WALLS Based on linear feet of wall Light Construction Heavy Construction a Outside walls North Exposure 30 20 Other than North exposure 60 30 b Inside Walls between conditioned and unconditioned spaces only 4 ROOF OR CEILING Use one only a Roof uninsulated b Roof 1 inch or more insulation c Ceiling occupied space above d Ceiling insulated with attic space above e Ceiling uninsulated with attic space above Floor Disregard if floor is directly on ground or over a basement 6 NUMBER OF PEOPLE 7 LIGHTS AND ELECTRICAL EQUIPMENT IN USE watts DOORS AND ARCHES CONTINUOUSLY OPENE
52. noid coil removed from valve or do not remove coil after unit is in operation This will cause the coil to burn out VALVE DRAIN PAN See Figure 28 During the cooling mode of operation condensate which collects in the drain pan is picked up by the condenser fan blade and sprayed onto the condenser coil This assists in cooling the refrigerant plus evaporating the water During the heating mode of operation it is necessary that water be removed to prevent it from freezing during cold outside temperatures This could cause the condenser fan blade to freeze in the accumulated water and prevent it from turning To provide a means of draining this water a bellows type drain valve is installed over a drain opening in the base pan This valve is temperature sensitive and will open when the outside temperature reaches 40 F The valve will close gradually as the temperature rises above 40 F to fully close at 60 F Figure 28 Bellows Assembly Drain Pan Valve HEATING ELEMENT See Figure 29 All heat pumps and electric heat models are equipped with a heating element with the exception of models starting with YS09 and YQ07 The YS and ES models are equipped with a 3 3 KW element The YM and EM models are equipped with a 4 0 KW element The YL and EL models are equipped with a 5 2 KW element The heating element contains a fuse link and a heater limit switch The fuse link is in series with the power s
53. o room Problem Sublimation Ensure that foam gaskets are installed in When unconditioned saturated between window panes amp in between the outside air mixes with conditioned unit amp the sleeve Also ensure that fresh air condensation forms on the air exhaust vents on applicable models are in cooler surfaces the closed position amp are in tact Follow installation instructions to ensure that donward 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 maintenance needs of entire unit Possible Cause Action Downward pitch of installation is too steep Excessive moisture Problem Insufficient air circulation thru area to be air conditioned Inadequate vapor barrier in building structure particularly Advise customer floors Adjust louvers for best possible air circulation T stat short cycles Problem Possible Cause Action T stat differential too narrow Replace t stat Plenum gasket not sealing allowing discharge air to short cycle t stat Restricted coil or dirty filter Clean amp advise customer of periodic cleaning amp maintenance needs of entire unit Possible Cause Action Check gasket Reposition or replace as needed Prolonged off cycles automatic operation Problem Anticipator resistor wire disconnected at t stat or system Refer to appropriate wiring diagram swi
54. ontinuity in all positions Replace if Inoperative system switch inoperative Refer to appropriate wiring diagrams to check Broken loose or incorrect wiring 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 anmalpr 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 amp replace if necessary Dirty filter Clean as recommended in Owner s Manual Dirty or restricted condenser or Use pressure wash or biodegradable cleaning Does not cool or evaporator coil agent to clean only cools slightly Adjust discharge louvers Use high fan speed Fresh air or exhaust air door open Close doors Instruct customer on use of this on applicable models feature Low capacity undercharge Check for leak amp make repair G mpressornotb mbine prober Check amperage draw against nameplate If p pumping propery not conclusive make pressure test T stat open or inoperative Problem Possible Cause Action Unit does not run Problem Replace fuse reset br
55. or CCII Compressor Running Quieter than Normal Amps Lower Undercharged System 25 OVERCHARGED REFRIGERANT SYSTEMS Compressor amps will be near normal or higher Noncondensables can also cause these symptoms To confirm remove some of the charge if conditions improve system may be overcharged If conditions don t improve Noncondensables are indicated Whenever an overcharged system is indicated always make sure that the problem is not caused by air flow problems Improper air flow over the evaporator coil may indicate some of the same symptoms as an overcharged system Suction Pressure Noticeably High Indoor Coil An over charge can cause the compressor to fail since it would be slugged with liquid refrigerant The charge for any system is critical When the compressor is noisy suspect an overcharge when you are sure that the air quantity over the evaporator coil is correct Icing of the evaporator will not be encountered because the refrigerant will boil later if at all Gauges connected to system will usually have higher head pressure depending upon amount of overcharge Suction pressure should be slightly higher Head Pressure Slightly Compressor Higher Slugged with Refrigerant Overcharged System 26 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
56. pplicable wiring diagram Defective solenoid coil Check for continuity of coil 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 Unit cools when heat is called for Reversing valve fails to shift Heating capillary tube partially Check for partially starved outer coil Replace restricted heating capillary tube Switch unit several times from heating to Cooling adequate cooling Check temperature rise across but heating coil Refer to specification sheet for correct insufficient temperature rise Deenergize solenoid coil raise head pressure energize solenoid to break loose If valve fails to make complete shift replace valve Check valve leaking internally Reversing valve failing to shift completely bypassing hot gas TROUBLESHOOTING CHART COOLING REFRIGERANT SYSTEM DIAGNOSIS COOLING Low Suction Pressure High Suction Pressure Low Head Pressure High Head Pressure Low Load Conditions High Load Conditions Low Load Conditions High Load Conditions Low Air Flow Across High Air Flow Across Refrigerant System Low Air Flow Across Indoor Coil Indoor Coil Restriction Outdoor Coil Refrigerant System Reversing Valve not Reversing Valve not Overcharged Restriction Fully Seated Fully Seated Undercharged Overcharged Undercha
57. r and ensure that the drain outlets are operating correctly Check the sealant around the sleeve and reseal areas as needed 6 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 TROUBLESHOOTING TOUCH TEST CHART TO SERVICE REVERSING VALVES NORMAL FUNCTION OF VALVE NOTES VALVE OPERATING CONDITION DISCHARGE TUBE from Compressor SUCTION TUBE to Compressor Tube to INSIDE Tube to OUTSIDE LEFT Pilot Capillary Tube RIGHT Pilot Capillary Tube TEMPERATURE OF VALVE BODY WARMER THAN VALVE BODY POSSIBLE CAUSES CORRECTIONS Normal Cooling Normal Heating MALFUNCTION OF VALVE Valve will not shift from 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 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 Pilot valve okay Dirt in one bleeder hole Recheck system Deenergize solenoid raise head pressure 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
58. r 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 Refrigerant System Components A Suction Discharge Line R Line Condenser Coil Compressor _ Metering Device _ Refrigerant Dryer Refrigerant Drier Liquid _ Line 22 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 refrigerantthen returns to the compressor where the cycle is repeated 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 Reco
59. r that continues to flow across the condenser coil 21 The RAC design determines at exactly what point in the condenser the change of state i e gas to a liquid takes place In all cases however the refrigerant must be totally condensed changed to a liquid before leaving the condenser coil The refrigerant leaves the condenser coil through the liquid line as a warm high pressure liquid It next will pass through the refrigerant drier if so equipped It is the function of the drier to trap any moisture present in the system contaminants and large particulate matter The liquid refrigerant next enters the metering device The metering device is a capillary tube The purpose of the metering device is to meter i e control or measure the quantity of refrigerant entering the evaporator coil In the case of the capillary tube this is accomplished by design through size and length of device and the pressure difference present across the device Since the evaporator coil is under a lower pressure due to the suction created by the compressor than the liquid line the liquid refrigerant leaves the metering device entering the evaporator coil As it enters the evaporator coil the larger area and lower pressure allows the refrigerant to expand and lower its temperature heat intensity This expansion is often referred to as boiling Since the unit s blower is moving Indoor air across the finned surface of the evaporato
60. rged Noncondensables air in System Moisture in System Defective Compressor Defective Compressor 35 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 pu Valve not E B Valve not Low Airflow Across Restriction Eu Seated EN Seated Indoor Coil Undercharged 222 lt 222 Moisture in System Defective Compressor Defective Compressor in System ELECTRICAL TROUBLESHOOTING CHART HEAT PUMP HEAT PUMP SYSTEM COOLS WHEN HEATING IS DESIRED Is Line Voltage Is the Selector Switch Present at the Solenoid Set for Heat YES Is the Solenoid Coil Good Replace the Solenoid Coil YES Reversing Valve Stuck Replace the Reversing Valve 36 MODEL SC06H10D WIRING DIAGRAM CAUTION FOLLOW WIRING DIAGRAM EXACTLY WHEN WIRING THE COMPRESSOR THE RUN AND START TERMINAL POSITIONS VARY FROM CAPACITOR CONVENTIONAL PRACTICE SYSTEM SWITCH ron BLACK SUPPLY CORD OR WHITE CONDUCTOR REEN TO GROUND SCREW SYSTEM SWITCH SEQUENCE SCHEMATIC _ CLoseD CONTACTS _ I C C SYSTEM SWITCH te OPEN L1 C L1 C FAN RUNNING CAPACTOR F H OVERLOAD M
61. rigerant Systems 26 Restricted Refrigerant System 27 Routine Maintenance 0 28 Troubleshooting esses 29 36 Wiring Diagrams sse 37 51 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 41 Condenser Coil some models 4 Front Cover System Switches Evaporator Coil Sleeve Return Air Grille Filter Blower Wheel Blower Motor 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 WARNING The information contained in this manual is intended for use by a qualified service technician who is familiar with the safety procedures required in installation and repair and who is equipped with the proper tools and test instruments Installation or repairs made by unqualified person
62. rom 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 a new filter drier Drift dry nitrogen through the system when making these connections 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 8 Reduce the system to zero gauge pressure 9 Connect vacuum pump to high side and low side of system with deep vacuum hoses or copper tubing Do not use regular hoses 10 Evacuate system to maximum absolute holding pressure of 200 microns or less NOTE This process can be accelerated by use of heat lamps or by breaking the vacuum with refrigerant or dry nitrogen at 5 000 microns Pressure system to 5 PSIG and leave in system a minimum of 10 minutes Release refrigerant and proceed with evacuation of a pressure of 200 microns or less 11 Break vacuum by charging system from the high side with the correct amount of liquid refrigerant specified This will prevent boiling the oil out of the crankcase and damage to the compressor due to over heating NOTE If the entire charge will not enter the high side allow the remainder to enter the low side in small increments while operating the unit
63. rriedrich Service Manual 2005 Room Air Conditioners TABLE OF CONTENTS Unit Identification u ener 3 Cooling Load 4 5 Heat Load Formis er 6 7 Specifications 000 4 8 9 Performance Data 10 Compressor dete es 11 Thermal Overload 11 12 Thermal Overload 12 Ram dee 12 System 12 16 Thermostats 17 Thermostats 4 2 2220 18 Resistor Heat Anticipator 18 Capacitor Run nennen 19 Check Valve Ein 19 Heat Pump Reversing 20 Solenoid Coil Heat Pump Models 20 Valve 22 222 2er 20 21 Heating 21 Refrigeration Sequence of Operation 21 22 Sealed Refrigeration Repairs 22 23 Refrigerant 2 nennen 24 Undercharged Refrigerant Systems 25 Overcharged Ref
64. s 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 UNIT IDENTIFICATION Model Number Code 550811 0 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 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 B Feb E May H Aug C Mar F Jun J Sep 8th Digit Engineering Major change 7th Digit Options 0 Straight Cool amp Heat Pump Models 121KW Heat Strip Normal 3 3 KW Heat Strip Normal 4 4 KW Heat
65. set 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 on 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 THERMOSTAT EQ AND YQ Models See Figure 19 This thermostat is single pole double throw cross ambient with a range of 60 to 92 F and a differential of 2 F Terminal 2 is common Figure 19 Thermostat EQ amp YQ Models TEST 1 Remove leads from thermostat 2 Turn thermostat knob clockwise to its coldest position 3 Testfor continuity between the two terminals Contacts should be closed 4 Turnthermostat knob counterclockwise to its warmest position 5 Test for continuity contacts should be open NOTE The thermostat must be within the temperature range listed to open and close To maintain the comfort level desired a cross ambient type thermostat is used The thermostat has a range from 60 2 F to 92 3 F The thermostat bulb is positioned in front of the evaporator coil to sense the return air temperature Thermostat malfunction or erratic operation is covered in the troubleshootin
66. sition between terminals C and 1 and 3 3 Lo Cool Position between terminals and 2 and and 3 4 Lo Heat Position between terminals C and 2 and and 4 5 Hi Heat Position between terminals C and 1 and C and 4 Figure 8 System Control Switch YQ Model Only ROTARY SYSTEM SWITCH SC Model See Figure 9 A rotary four position switch is used to turn on the unit and select the operation desired Figure 9 System Control Panel SC Model Only LO COOL COOLER SC SYSTEM CONTROL SWITCH TEST See Figure 10 The switching arrangement of the control is as follows 1 All contacts open 2 Hi Fan Contacts closed between terminals L1 and 1 3 Hi Cool Contacts closed between terminals L1 to 1 and L1 and C 4 Lo Cool Contacts are closed between terminals L1 to 2 and L1 to C Figure 10 System Control Switch SC Model Only 1 Disconnect leads from control switch 2 Check continuity between all switch positions shown in Figure 11 SYSTEM CONTROL SWITCH KS KM SL Models See Figure 11 A five position control switch is used to regulate the operation of the fan motor and compressor The compressor can be operated with the fan operating at low medium or high speed The fan motor can also be operated independently on medium speed See
67. split capacitor motor such as the compressor and fan motor A single capacitor can be used for each motor or a dual rated capacitor can be used for both The capacitor s primary function is to reduce the line current while greatly improving the torque characteristics of a motor The capacitor also reduces the line current to the motor by improving the power factor of the load The line side of the capacitor is marked with a red dot and is wired to the line side of the circuit Figure 25 Dual Rated Run Capacitor Hook up FAN MOTOR COM 2 RED DOT RUN CAPACITOR CAPACITOR TEST 1 Remove capacitor from unit 2 Check for visual damage such as bulges cracks or leaks 3 For dual rated apply an ohmmeter lead to common C terminal and the other probe to the compressor HERM terminal A satisfactory capacitor will cause a deflection on the pointer then gradually move back to infinity 4 Reverse the leads of the probe and momentarily touch the capacitor terminals The deflection of the pointer should be two times that of the first check if the capacitor is good 5 Repeat steps 3 and 4 to check fan motor capacitor NOTE A shorted capacitor will indicate a low resistance and the pointer will move to the 0 end of the scale and remain there as long as the probes are connected An open capacitor will show no movement of the pointer when placed across the terminals of the capacitor CHECK
68. st intermediate speeds If the control is in the MoneySaver mode and the thermostat calls for cooling the fan will start then stop after approximately 2 minutes then the fan and compressor will start together approximately 2 minutes later Figure 5 Fan Motor SYSTEM CONTROL PANEL EQ and YQ Models See Figure 6 EQ and YQ models use a six position control switch to regulate the operation of the unit Figure 6 System Control Panel EQ and YQ Models TWINTEMP Warm e Hi Heat Fan Only e Lo Heat Hi Cool Lo Cool Cool Wait three minutes before restarting SYSTEM CONTROL SWITCH TEST See Figure 7 Turn knob to phase of switch to be tested There must be continuity as follows 1 Fan Only Position between terminals MS and H 2 Hi Cool Position between terminals L1 and C and MS and 3 Low Cool Position between terminals L1 and and MS and LO 4 Low Heat Position between terminals L2 and 2 and MS and LO 5 Heat Position between terminals 12 and 2 and MS and Figure 7 System Control Switch EQ Models YQ SYSTEM CONTROL SWITCH TEST See Figure 8 Turn knob to phase of switch to be tested There must be continuity as follows 1 Fan Only Position between terminals 1 2 II Cool Po
69. sulated 2 Ft x 0 10 Built up Roof 2 insulated Ft x 0 10 Built up Roof 1 2 insulated LL x 0 20 No Insulation Ft x 0 33 Area Sq Ft Above Vented Crawl space Insulated 1 Ft x 0 20 Uninsulated Sq Ft x 0 50 Slab on Ground Lin Ft x 1 70 1 Perimeter insulation Lin Ft x 1 00 Based on Linear Feet of outside wall TOTAL HEAT LOSS PER F BTU HR F Multiply total BTU HR F X 30 and plot on the graph below at 40 F Draw a straight line from the 70 base point thru the point plotted at 40 F The intersection of this heat loss line with the unit capacity line represents the winter design heating load LI HH He pee 11111 ae DEREN EHEN II ST H RRR Ree I I BE LI I I I I I I I I I I I HEAT Loan I I I 4111111111111111111111111111111111716 11111111 AMBIENT TEMPERATURE F BASE POINT SPECIFICATIONS Electrical Characteristics 60 Hertz Energy Cooling Heating Efficiency Capacity Capacity Volts Cooling Cooling Heating Heating Ratio Model BTU h BTU h Rated Amps Watts Amos Watts EER XSTAR XQ05L10 5500 XQ06L10 6300 XQ08L10 8000 XQ10L10 10000 XQ12L10 11700 QUIETMASTER Programmable 5508110 8400 5509110 9100 191 115 18 5510110 10400 867 12
70. switch section as indicated on decorative control panel Figure 11 System Control Panel KS KM SL Quietillaster Cooler Wait three minutes before restarting SYSTEM CONTROL SWITCH TEST See Figure 12 Disconnect leads from control switch There must be continuity as follows 1 Position no continuity between terminals 2 Lo Cool Position between terminals L1 and C LO and MS 3 Med Cool Position between terminals L1 and M and MS 4 Hi Cool Position between terminals L1 and C and MS 5 Fan Only Position between terminals L1 and 2 Figure 12 System Control Switch SYSTEM CONTROL PANEL See Figure 13 A six position control switch is used to regulate the operation of the fan motor and compressor The compressor can be operated with the fan operating at low medium or high speed The fan motor can also be operated independently on medium speed See switch section as indicated on decorative control panel Figure 13 System Control Panel Deluxe Series RS amp RM QuieiMaster 3 Cooler Wait three minutes before restarting SYSTEM CONTROL SWITCH TEST Disconnect leads from control switch See Figure 15 There must be continuity as follows Figure 14 POSITION OFF 1 LLCOOL 2 LOCOOL 3 MED COOL 4 HI COOL Figure 15 System Control Switch SYSTEM CONTROL
71. tch Disconnect plus from outlet Remove resistor from bracket Insert plug amp depress COOL 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 Replace t stat causing a wide differential Possible Cause Action Anticipator resistor shorted or open Outside water leaks Evaporator drain pan cracked or obstructed Water dau eonitessorares Detach shroud from pan amp coil Clean amp P remove old sealer Reseal reinstall amp check condencer 7 or biodegradable cleaning eade Adjust fan blade to 1 2 of condenser coil positioned Repair clean or replace as required 33 34 HEAT COOL ROOM AIR CONDITIONERS TROUBLESHOOTING TIPS Problem Possible Cause Action Room temperature uneven Heating cycle Problem Disconnect power to unit Remove resistor Heat anticipator resistor shorted from t stat bulb block Plus in unit amp allow to on applicable models operate Feel resistor for heat If not heat replace resistor Wide differential partial loss of t stat bulb charge Replace t stat amp check Refer to appropriate wiring diagram Resistor Incorrect wiring is energized during ON cycle of compressor or fan Unit will not defrost Problem Possible Cause Action Incorrect wiring Re
72. to SET temperature by pressing any key except the ON OFF button or after 10 seconds has elapsed Activating Test Mode Activate test mode by pressing at the same time the 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 degrees 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 no delay when switching modes Test Mode default settings are ON Money Saver 60 degrees F and High fan speed Activating Error Code Mode Submode of Test Mode Unit must be in Test Mode to enter Error Code Mode 1 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 display 00 Consecutive presses will scroll through
73. tonio Texas 78218 5212 210 357 4400 FAX 210 357 4480 www friedrich com Printed in the U S A RAC Svc 05 3 05
74. upply and will open and interrupt the power when the temperature reaches 161 6 F ora short circuit occurs in the heating element Once the fuse link separates a new fuse link must be installed NOTE Always replace with the exact replacement The heater element has a high limit control This control is a bimetal thermostat mounted in the top of the heating element Should the fan motor fail or filter become clogged the high limit control will open and interrupt power to the heater before reaching an unsafe temperature condition The control is designed to open at 110 F 6 F Test continuity below 110 F and for open above 110 F The heating element for the Y model is energized by an outdoor thermostat The outdoor thermostat is adjusted ata predetermined temperature to bring on the heating element and turn off the compressor The room thermostat will then control the cycling of the element when the selected indoor temperature is reached Testing of the elements can be made with an ohmmeter across the terminals after the connecting wires have been removed A cold resistance reading of approximately 14 5 ohms for the 3 3 KW heater 11 9 ohms for the 4 0 KW heater and 9 15 ohms for the 5 2 KW heater should be registered Figure 29 Heating Element 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 un
75. ven Disregard this item if the floor is directly on the ground or over a basement 6 Multiply the number of people who normally occupy the space to be air conditioned by the factor given Use a minimum of 2 people 7 Determine the total number of watts for light and electrical equipment except the air conditioner itself that will be in use when the room air conditioning is operating Multiply the total wattage by the factor given 8 Multiply the total width linear feet of any doors or arches which are continually open to an unconditioned space by the applicable factor NOTE Where the width of the doors or arches is more than 5 feet the actual load may exceed the calculated value In such cases both adjoining rooms should be considered as a single large room and the room air conditioner unit or units should be selected according to a calculation made on this new basis 9 Total the loads estimated for the foregoing 8 items 10 Multiply the subtotal obtained in item 9 by the proper correction factor selected from the map for the particular locality The result is the total estimated design cooling load in BTU per hour For best results a room air conditioner unit or units having a cooling capacity rating determined in accordance with the NEMA Standards Publication for Room Air Conditioners CN 1 1960 as close as possible to the estimated load should be selected In general a greatly oversized unit which would operate intermittent
76. very System gt Vacuum Pump capable of 200 microns or less vacu um D Acetylene Welder Electronic Halogen 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 Ibs 10 Low Pressure Gauge 30 150 Ibs 11 Vacuum Gauge 0 1000 microns EQUIPMENT MUST BE CAPABLE OF Recovery CFC s as low as 5 2 Evacuation from both the high side and low side of the system simultaneously 3 Introducing refrigerant charge into high side of the system 4 Accurately weighing the refrigerant charge actually introduced into the system 5 Facilities for flowing nitrogen through refrigeration tubing during all brazing processes HERMETIC COMPONENT REPLACEMENT The following procedure applies when replacing components in the sealed refrigeration circuit or repairing refrigerant leaks Compressor condenser evaporator capillary tube refrigerant leaks etc 1 Recover the refrigerant from the system at the process tube located on the high side ofthe system by installing a line tap on the process tube Apply gauge from process tube to EPA approved gauges from process tube to EPA approved recovery system Recover CFC s in system to at least 5 2 Cut the process tube below pinch off on the suction side of the compressor 3 Connect the line f

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