SiBE12-908 Check
Service Diagnosis 176
3.11 Electronic Expansion Valve Check
Check No.17 Check the electronic expansion valve (EV) as follows:
1. Check if the EV connector properly inserted into the control PCB. Collate the number of EV
main body with that of the connector.
2. Check to see that clatter (latching sound) is heard from all of the EVs when turning on the
power supply again after turning it off.
3. If there are EVs which do not sound clatter, disconnect the connectors of these EVs and
check them for continuity.
4. If there is no clatter (latching sound) on all of the EVs in step 2, the outdoor PCB is defective.
5. For EVs for which continuity is established in step 3, connect the coil which sounded clatter
to the EV main body which did not sound, and make sure the latching sound be heard again.
If latching sound is heard, outdoor unit PCB is defective.
If there is no latching sound, the EV main body is defective.
Note Latching sound varies by each valve.
(R6028)
Harness: 6 wires
6-pin connector
1 2 3 4 5 6
Check
5 – 2
5 – 4
6 – 1
6 – 3
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