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