Daikin VRV-WIII RWEYQ72PTJU Service Manual page 189

SiUS30-1301
1. It is normal that there is no continuity between both ends of X3A when the power supply turns
Note:
Service Diagnosis
A
Turn ON the power supply.
Check
whether there is
continuity between
both X3A ends of the
ground leakage
detection PCB.
(A3P)
Continuity
Check
whether there
is continuity between
both ends of high
pressure
switch.
Continuity
Normal
It is supposed that ground leakage occurs due to temporary liquid back or accumulation of
refrigerant.
This phenomenon can occur when power fails while in operation or is cut off for an
extended period of time.
OFF and for a period of 9 seconds at maximum after the power supply turns ON.
Troubleshooting by Indication on the Remote Controller
No continuity (∗2)
No continuity
Replace the
ground leakage
detection PCB
(A3P).
Replace the high
pressure switch.
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