Friedrich KM18J30A - Manuals

Page 7 SPECIFICATIONS KS10J10 KS12J10 KS12J30A KM18J30A KM21J30 KL25J30A BTUH 12500 18000 21000 25000 10000 12000 12500 18000 20500 24700 E.E.R. 10.0 9.6 9.0 8.3 10.3 9.5 10.0 9.6 9.0 8.2 Volts 230 230 230 230 115 115 208 208 208 208 Amperes 5.8 8.3 10.5 13.5 9.1 10.8 6.2 9.1 11.3 15.0 Total Watts 1...

Page 8 COMPONENTS OPERATION & TESTING WARNING DISCONNECT ELECTRICAL POWER TO UNIT BEFORE SERVICING OR TESTING COMPRESSORS Compressors are single phase, 15 or 230/208 volt, de-pending on the model unit. All compressor motors arepermanent split capacitor type using only a running ca-pacitor across...

Page 9 The overload is wired in series with the common motorterminal. The overload senses both major amperage andcompressor temperature. High motor temperature oramperage heats the disc causing it to open and breakthe circuit to the common motor terminal. Figure 3: External Overload Heat generated w...

Page 10 Figure 5: Fan Motor 5. Apply “live” test cord probes on each of the re-maining wires from the speed switch or systemswitch to test intermediate speeds. CAPACITOR, RUN A run capacitor is wired across the auxiliary and mainwinding of a single phase permanent split capacitormotor such as the co...

Page 11 Figure 7: System Control Panel THERMOSTAT(Figure 9) A cross ambient thermostat is used on all standard chas-sis units. In addition to cycling the unit in a heating orcooling operation, the thermostat will terminate the cool-ing cycle in the event ice forms on the evaporator coil, inthis case...

Page 12 RESISTOR(Heat Anticipator) Failure of the resistor will cause prolonged “off ” and “on”cycles of the unit. When replacing a resistor, be sureand use the exact replacement. Resistor ratings are asfollows: 115 Volt - 5,000 ohms 3 watt230 Volt - 20,000 ohms 3 watt Figure 10 RESISTOR FIGURE 11 R...

Page 14 ROTARY COMPRESSOR SPECIALTROUBLESHOOTING AND SERVICE Basically, troubleshooting and servicing rotary compres-sors is the same as on the reciprocating compressorwith only a few exceptions. 1. Because of the spinning motion of the rotary, themounts are critical. If vibration is present, checkt...

Page 15 Troubleshooting Cooling PROBLEM POSSIBLE CAUSE TO CORRECT Check for voltage at compressor. 1115 volt and 230 voltunits will operate at 10% voltage variance.Set thermostat to coldest position. Test thermostat andreplace if inoperative.Hard start compressor. Direct test compressor. If com-pres...

Page 22 * Not Shown QUIETMASTER "KS" - "KM" SERIES PARTS LIST REF. PART NO. DESCRIPTION APPLICATION K K K K K S S S M M 1 1 1 1 2 0 2 2 8 1 J J J J J 1 1 3 3 3 0 0 0 0 0 ELECTRICAL PARTS A A 1 615-628-09 Compressor, Tecumseh, 115 V., 60 Hz., 1 Ph., Model RK5510E ........................

Page 24 QUIETMASTER "KS" - "KM" SERIES PARTS LIST REF. PART NO. DESCRIPTION APPLICATION K K K K K S S S M M 1 1 1 1 2 0 2 2 8 1 J J J J J 1 1 3 3 3 0 0 0 0 0 A A CHASSIS PARTS (Cont.) 34 914-004-00 Bolt, Compressor Mounting ...............................................................

Page 29 Use Factory Certified Parts . . . Printed in U.S.A. Friedrich Air Conditioning Co. 4200 North Pan Am Expressway • P.O. Box 1540 San Antonio, Texas 78295-1540 • U.S.A. Phone: (210) 357-4400 Fax: (210) 357-4480 RAC-K (1/98)