FIRST YEAR ANY PART: If any part supplied by FRIEDRICH fails because of a defect in workmanship or material within twelve months from date of original purchase, FRIEDRICH will repair the product at no charge, provided room air conditioner is reasonably accessible for service.
ROUTINE MAINTENANCE NOTE: Units are to be inspected and serviced by qualifi ed service personnel only. Routine maintenance is required annually or semi-annually, depending upon annual usage. Clean the unit air intake fi lter at least every 250 to 300 fan hours of operation or when the unit’s indicator light is on if so equipped.
FRIEDRICH ROOM MODEL NUMBER CODE 1st DIGIT - FUNCTION W = Thru-The-Wall, WallMaster Series 2nd DIGIT - TYPE S = Straight Cool E = Electric Heat Y = Heat Pump 3rd & 4th DIGITS - APPROXIMATE BTU/HR (Cooling) Heating BTU/HR capacity listed in Specifi cations/Performance Data Section...
PERFORMANCE DATA * Rating Conditions: 80 degrees F, room air temp. & 50% relative humidity, with 95 degree F, outside air temp & 40% relative humidity Calculate the heat loss of the space to be heated. As long as the heat loss does not exceed the resistance heating capacity rating of the unit, the heating performance will be satisfactory. Change-over from heat pump operation to resistance operation on models indicated is automatic at a preset outside ambient temperature of approximately 35°F.
ELECTRICAL DATA Wire Size Use ONLY wiring size recommended for single outlet branch circuit. Fuse/Circuit Use ONLY type and size fuse or HACR Breaker circuit breaker indicated on unit’s rating ELECTRIC SHOCK HAZARD. plate. Proper current protection to the unit is the responsibility of the owner.
FUNCTIONAL COMPONENTS A. Mechanical components Bellows condensate valve Temperature-sensitive valve that opens up to drain off condensate water when the outside temperature falls below 40°F and closes when the outside temperature reaches 58°F. Plenum assembly Diffuser with directional louvers used to direct the conditioned airfl ow. Blower wheel Attaches to the indoor side of the fan motor shaft and is used for distributing unconditioned, room side air though the heat exchanger and delivering conditioned air into the room.
SYSTEM CONTROL PANEL (“WS” Models) Activating Error Code Mode (Submode of Test Mode) Figure 6: System Control Panel 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 & WS models. LED for the “TIMER ON/OFF”...
Frost Probe Sensor: Disables compressor at 35 degrees SYSTEM CONTROL SWITCH - TEST F +/- 3 degrees F Disconnect leads from control switch. Turn control to posi- tion being tested (see Figure 8). There must be continuity Indoor Probe Sensor: Control range is 60 degrees F to 90 as follows: degrees F +/- 2 degrees F Indoor temperature will be displayed by pressing:...
REFRIGERATION SYSTEM SEQUENCE OF OPERATION A good understanding of the basic operation of the refrigera- the evaporator coil. As it enters the evaporator coil, the tion system is essential for the service technician. Without larger area and lower pressure allows the refrigerant to this understanding, accurate troubleshooting of refrigeration expand and lower its temperature (heat intensity).
SEALED REFRIGERATION SYSTEM HERMETIC COMPONENT REPLACEMENT The following procedure applies when replacing com- REPAIRS ponents in the sealed refrigeration circuit or repairing EQUIPMENT REQUIRED: refrigerant leaks. (Compressor, condenser, evaporator, capillary tube, refrigerant leaks, etc.) 1. Voltmeter Recover the refrigerant from the system at the pro- 2.
NOTE: All inoperative compressors returned to all contamination from system. Inspect suction and Friedrich must have all lines properly plugged with discharge line for carbon deposits. Remove and the plugs from the replacement compressor. clean if necessary.
TROUBLESHOOTING TOUCH TEST CHART: TO SERVICE REVERSING VALVES NORMAL FUNCTION OF VALVE NOTES: VALVE OPERATING * TEMPERATURE OF VALVE BODY CONDITION ** WARMER THAN VALVE BODY POSSIBLE CAUSES CORRECTIONS Cool Normal Cooling Cool *TVB as (2) as (1) Cool Normal Heating Cool *TVB as (1)
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COOLING ONLY ROOM AIR CONDITIONERS: TROUBLESHOOTING TIPS Problem Possible Cause Action Check voltage at compressor. 115V & 230V Low voltage units will operate at 10% voltage variance T-stat not set cold enough or Set t-stat to coldest position. Test t-stat & re- inoperative place if inoperative Compressor hums but cuts off on...
Problem Possible Cause Action Replace fuse, reset breaker. If repeats, check Fuse blown or circuit tripped fuse or breaker size. Check for shorts in unit wiring & components Power cord not plugged in Plug it in Unit does not run System switch in "OFF"...
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Problem Possible Cause Action Overload inoperative. Opens too Check operation of unit. Replace overload if soon system operation is satisfactory Allow a minimum of 2 minutes to allow Compressor restarted before pressures to equalize before attempting to system pressures equalized restart.
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Problem Possible Cause Action Sublimation: Ensure that foam gaskets are installed in When unconditioned saturated, between window panes & in between the outside air mixes with conditioned unit & the sleeve. Also, ensure that fresh air, condensation forms on the air/exhaust vents (on applicable models) are in cooler surfaces the closed position &...
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HEAT / COOL ROOM AIR CONDITIONERS: TROUBLESHOOTING TIPS Problem Possible Cause Action Disconnect power to unit. Remove resistor Heat anticipator (resistor) shorted from t-stat bulb block. Plus in unit & allow to (on applicable models) operate. Feel resistor for heat. If not heat, replace resistor Room temperature uneven...
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Problem Possible Cause Action Incorrect wiring Refer to applicable wiring diagram Defective solenoid coil Check for continuity of coil Block condenser coil & switch unit to cooling. Unit cools when Allow pressure to build up in system, then heat is called for Reversing valve fails to shift switch to heating.
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“WS” - “WE” - “WY” SERIES SLEEVE PARTS REF. PART NO. DESCRIPTION APPLICATION CHASSIS PARTS, (Cont.) 616-036-01 Sleeve Assembly ............616-032-00 Panel, Weather Inner ............ 616-030-01 Grille, Louvered ............. 616-033-01 Panel, Weather Outer ........... * Not Shown WS, WE & WY SERIES SLEEVE PARTS...
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Friedrich Air Conditioning Co. Post Office Box 1540 • San Antonio, Texas 78295-1540 4200 N. Pan Am Expressway • San Antonio, Texas 78218-5212 (210) 357-4400 • FAX (210) 357-4480 www.friedrich.com Printed in the U.S.A. WM-Svc-Prts-06 (5-06)