Daikin RXYQ96PYDN, Service Manual

Page: 373 / 567

Troubleshooting by Indication on the Remote Controller SiUS34-801A_b
358 Troubleshooting
Troubleshooting
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Turn OFF the power supply,
and then disconnect
compressor lead wire.
Replace the faulty
part.
Replace the faulty
part.
Securely connect
the connectors.
Replace the
earth leakage
detection PC board
(A7P or A9P*
2
).
Insulation fault
Insulation fault
Disconnected
YES
Check the
compressor for insulation
using a megger
tester.
Check the
whole product for
insulation resistance
using a megger
tester.
Check the
connectors of the HPS
line for any
disconnection.
Check the
earth leakage
detection PC board
(A7P or A9P*
2
) for
any broken wire
in it.
Reinstall all wirings.
Turn ON the power supply.
Check
whether there
is continuity between
both X3A ends of
the earth leakage
detection
PC board.
Check whether
there is continuity
between both ends
of HPS.
Normal
No continuity
*
2
No continuity
Replace the earth
leakage detection
PC board (A7P or
A9P*
2
).
Replace the HPS.
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.
*1: It is normal that there is no continuity between both ends of X3A when the power supply
turns OFF and for a period of 9 seconds at maximum after the power supply turns ON.
*2: A7P: RXYQ72, 96, 120PYDN, PTJU
REMQ72, 96, 120PYDN, PTJU
A9P: REYQ72, 96, 120PYDN, PTJU
RXYQ144PTJU, REYQ144PTJU