Si01-406CheckService Diagnosis1215.10 Power Transistor CheckCheck No.13Note:Check to make sure that the voltage between the terminal of Power transistor (+) and (-) isapprox. 0 volt before checking power transistor.< Measuring method >Disconnect the compressor harness connector from the outdoor unit PCB. To disengage theconnector, press the protrusion on the connector.Then, follow the procedure below to measure resistance between power transistor (+) and (-)and the U, V and W terminals of the compressor connector with a multi-tester. Evaluate themeasurement results for a pass/fail judgment.Negative (-) terminal oftester (positive terminal(+) for digital tester)Power transistor(+)UVWPower transistor(-)UVWPositive (+) terminal oftester (negative terminal(-) for digital tester)UVWPower transistor(+)UVWPower transistor(-)Normal resistanceSeveral kΩto several MΩ(∗)Unacceptable resistanceShort (0Ω) or openMULTIMETER(DC, VOLTAGA RANGE)DB1TRM1S90 THERMISTOR LEAD WIRES80 FOUR WAY VALVE LEAD WIRE (Heating Pump only)S70 FAN MOTOR LEAD WIREREACTOR LEAD WIRECOMPRESSOR LEAD WIRE(R2956)
