Daikin FTXS30HVJU Service Manual

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Contents

Daikin FTXS30HVJU Service Manual Manual pdf 118 page image

SiUS04-924 CheckService Diagnosis 1115.1.10 Capacitor Voltage CheckCheck No.12 Before this checking, be sure to check the main circuit for short-circuit. Checking the capacitor voltage With the circuit breaker still on, measure the voltage according to the drawing of the model inquestion. Be careful never to touch any live parts.5.1.11 Power Transistor CheckCheck No.13 Checking the power transistor Never touch any live parts for at least 10 minutes after turning off the circuit breaker. If unavoidably necessary to touch a live part, make sure the power transistor's supply voltage isbelow 50 V using the tester. For the UVW, make measurements at the Faston terminal on the board or the relay connector.OL lead wireThermistor lead wireFan motor lead wire Electronic expansion valvelead wireReversing solenoidvalve lead wire(Heat pump type only)Compressor lead wireReactor lead wireMultimeter(DC voltage range)(R5222)Tester's negative terminal Power transistor(+) UVW Power transistor(–) UVWTester's positive terminal UVW Power transistor(+) UVW Power transistor(–)Normal resistance Several k to several MAbnormal resistance 0 or (R9747)W V U