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SM830043
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4
4. Service procedures
4. SERVICE PROCEDURES
4-1 Troubleshooting .............................................................................................56
(1) Check before and after Troubleshooting ................................................ 56
(2) Air conditioner does not operate ............................................................ 57
(3) Outdoor unit does not run ...................................................................... 61
(4) Indoor unit does not run ......................................................................... 63
(5) Some part does not operate ................................................................... 63
(6) Outdoor fan does not run ....................................................................... 64
(7) Outdoor fan speed is not switched from High to Low even when
the outdoor temperature falls below 25.5°C. .......................................... 64
(8) Compressor does not run ....................................................................... 64
(9) Poor cooling ............................................................................................65
(10) Excessive cooling....................................................................................66
4-2 A Sensor is Defective.....................................................................................67
4-3 Operation of Major Electrical Parts ............................................................... 67
4-4 Checking the Electrical Components ............................................................ 68
(1) Measurement of Insulation Resistance .................................................. 68
(2) Checking the Protective Devices............................................................ 69
(3) Checking the Electrical Parts ................................................................. 70
(4) Thermistor Characteristic Curve............................................................. 71