Daikin AT12BV1LS Pocket Manual
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Si10-417 TroubleshootingService Diagnosis 1515.4.3 Electronic Expansion Valve CheckCheck No.4(for PairSystem)Conduct the followings to check the electronic expansionvalve (EV).1. Check to see if the EV connector is correctly insertedin the PCB. Compare the EV unit and the connectornumber.2. Turn the power off and back on again, and check tosee if all the EVs generate latching sound.3. If any of the EVs does not generate latching noise inthe above step 2, disconnect that connector andcheck the conductivity using a tester.Check the conductivity between pins 1, 3 and 6, andbetween pins 2, 4 and 5. If there is no conductivitybetween the pins, the EV coil is faulty.4. If no EV generates latching sound in the above step 2,the outdoor unit PCB is faulty.5. If the conductivity is confirmed in the above step 2,mount a good coil (which generated latching sound) inthe EV unit that did not generate latching sound, andcheck to see if that EV generates latching sound.∗If latching sound is generated, the outdoor unit PCBis faulty.∗If latching sound is not generated, the EV unit isfaulty.Note: Please note that the latching sound varies depending onthe valve type.Harness 6P6P Connector Check5-25-46-16-31 2 3 4 5 6(R1082) |
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