Electronic Expansion Valve Check - Daikin CTXU25G2V1B Service Manual

SiBE12-908
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
2. Check to see that clatter (latching sound) is heard from all of the EVs when turning on the
3. If there are EVs which do not sound clatter, disconnect the connectors of these EVs and
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 conductivity is established in step 3, connect the coil which sounded
Note Latching sound varies by each valve.
Service Diagnosis
main body with that of the connector.
power supply again after turning it off.
check them for conductivity.
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.
Harness: 6 wires
6-pin connector
1 2 3 4 5 6
5 – 2
5 – 4
Check
6 – 1
6 – 3
(R6028)
Check
169