1.SPE C IFIC A T IO N S 1-1 Unit S p ecification s.................................................................................................................................................... (1) CM 1 8 1 2 ........................................................................ :...................................................................................... (2) Applicable Indoor U n it..................................................................................................................................... 1-2 Major Component S p ecification s.......................................................................................................................... (1) Outdoor U nit........................................................................................................................................................ (2) Indoor U n it.......................................................................................................................................................... 1-3 Other Component Specifications........................................................................................................................... (1) Outdoor U nit........................................................................................................................................................ (2) Indoor U n it.......................................................................................................................................................... 2.3.P E R F O R M A N C E C H A R T S 2-1 Operating Current....................................................................................................................................................... 2-2 High and Low Pressure............................................................................................................................................. AIR T H R O W D IST A N C E C H A R T .......................................................................................................................... 4. FU N C T IO N 4-1 Room Temperature C ontrol..................................................................................................................................... 4-2 Freeze Prevention....................................................................................................................................................... 4-3 Fan Speed Auto (Indoor F an )................................................................................................................................. 5. E L E C T R IC A L DATA • Schcm atic D iag ram ......................................................................................................................................................... • Electric Wiring Diagram (PCB A ss’y ) ..................................................................................................................... 6. T R O U B L E SH O O T IN G 6-1 Check before and after troubleshooting............................................................................................................... (1) Check power supply w iring............................................................................................................................ (2) Check inter-unit w iring..................................................................................................................................... (3) Check power su p p ly ......................................................................................................................................... (4) Check lead wires and connectors in indoor and outdoor units.............................................................. (5) R eference............................................................................................................................................................. (a) Condition of general cooling operation 6-2 Air conditioner does not operate...................................................................................................................................16 (1) Circuit breaker trips (or fuse b lo w s)..................................................................................................................... 16 (a) When circuit breaker is set to ON, it trips in a few moments (b) Circuit breaker trips in several minutes after turning air conditioner ON (2) All units (indoor and outdoor) do not run.................................................................................................... ....... 18 (a) Power is not supplied (b) Check OPERATION selector switch in indoor unit (c) Check fuse FI in indoor unit (3) Neither indoor unit A nor compressor motor A runs................................................................................ ....... 20 (a) Check transformer in indoor unit A (or B) (b) Check fuse on PCB A ss’y in indoor unit A (or B) 6-3 A particular component o f air conditioner does not operate.......................................................................... ....... 22 (1) Only compressor motor A does not run (or B ) .......................................................................................... ....... 22 (2) Only indoor fan does not run.......................................................................................................................... ....... 23 (3) Only outdoor fan does not r u n ...................................................................................................... .·...................... 23 6-4 Air conditioner operates, but abnormalities occur.................................................................................................... 24 (1) Poor C ooling............................................................................................................................................................... 24 (2) E xcessive C o o lin g ............................................................................................................................................. ....... 25 6-5 Indoor (heat exchanger) coil temperature sensor (TH1) is d efectiv e........................................................... ....... 25 (1) Open....................................................................................................................................................................... ....... 25 (2) Shortage................................................................................................................................................................ ....... 25 7.C H E C K IN G E L E C T R IC A L C O M P O N E N T S 7-1 Measurement o f Insulation R esistance................................................................................................................ ....... 26 (1) Power Supply W ires................................................................................................................................................. 26 (2) Indoor U n it.......................................................................................................................................................... ....... 26 (3) Outdoor U nit........................................................................................................................................................ ....... 26 (4) Measurement o f Insulation Resistance for Electrical Parts.................................................................... ....... 26 7-2 Checking Continuity o f Fuse on PCB A ss’y ...................................................................................................... ....... 27 7-3 Checking Motor Capacitor...................................................................................................................................... ....... 27 7-4 Appearance o f Electrical P arts............................................................................................................................... ....... 28 (1) Auxiliary R elay................................................................................................................................................... ....... 28 (2) R ela y ...................................................................................................................................................................... ....... 28