Daikin REYQ8-48PY1B, Service Manual

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Troubleshooting by Indication on the Remote Controller SiBE37-701_B
319 Troubleshooting
Troubleshooting
*1. List of Inverter PCBs
Model Name Electric symbol
REYQ 8, 10,12P
Compressor inverter PCB A5P
Fan inverter PCB A6P, A7P
REYQ 14, 16P
Compressor inverter PCB A4P, A7P
Fan inverter PCB A6P, A9P
REMQ 8, 10, 12P
Compressor inverter PCB A4P
Fan inverter PCB A5P
REMQ 14, 16P
Compressor inverter PCB A4P
Fan inverter PCB A5P, A7P
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
NO
YES
Replace the lead wires.
NO
YES
NO YES
NO
YES
YES
NO
YES
Turn OFF the power supply
once, and then check the
compressor lead wires.
Do the lead wires have
any disconnection, broken
wire, short circuit, or
ground fault?
Turn ON the power supply
again.
Does the power
supply normally come
back ON?
It is supposed that the malfunction
results from external causes other
than failures (e.g. exogenous
noises or thunder).
Is the individual
system applied to the
outdoor unit?
Multi system Individual system
While in monitor mode, check
whether the system is right-
hand (control PCB 1) or left-
hand (control PCB 3).
While in monitor mode,
check the outdoor unit
concerned.
Check if the power
transistor is
normal.
Check if the power
transistor of the
fan driver is
normal.
Check if insulation
resistance of the
compressor is 100k
Ω
and above.
Replace the compressor and
compressor inverter PCB (A2P) at
the same time.
Replace the inverter PCB (A2P).
Replace the compressor inverter
PCB (A2P) and fan inverter PCB
(A5P).
Replace the inverter PCB (A2P).
NO
Check 4
∗
Check 4
∗
∗
Check 4 : Referring to the information on P384.