Daikin VRV III REYQ8PY1 Service Manual page 295

Troubleshooting by Indication on the Remote Controller
Troubleshooting
*1. List of Inverter PC boards
284
Be sure to turn off power switch before connect or disconnect connector,
Caution
or parts damage may be occurred.
Turn OFF the power supply
once, and then check the
compressor lead wires.
lead wires have any
disconnection, broken wire,
short circuit, or ground
Turn ON the power supply
power supply normally
come back ON?
YES
single system applied
to the outdoor
Single system
While in monitor mode, check
whether the system is right-
hand (control PC board 1) or
left-hand (control PC board 3).
∗
Check 4
Check if the power
transistor is
normal.
YES
∗
Check 4
Check if the power
transistor of the fan
driver is normal.
YES
∗
Check 4 : Referring to the information on P349.
Model
Compressor inverter PC board
REYQ 8, 10,12P
Fan inverter PC board
Compressor inverter PC board
REYQ 14, 16P
Fan inverter PC board
Compressor inverter PC board
REMQ 8, 10, 12P
Fan inverter PC board
Compressor inverter PC board
REMQ 14, 16P
Fan inverter PC board
Do the
YES
fault?
NO
again.
Does the
YES
NO
Is the
NO
unit?
Multi system
While in monitor mode,
check the outdoor unit
concerned.
NO
Check if
insulation resistance of
the compressor is 100kΩ
and above.
YES
NO
Name
Replace the lead wires.
It is supposed that the malfunction
results from external causes other
than failures (e.g. exogenous
noises or thunder).
NO
Replace the compressor and
compressor inverter PC board
(A2P) at the same time.
Replace the inverter PC board
(A2P).
Replace the compressor inverter
PC board (A2P) and fan inverter
PC board (A5P).
Replace the inverter PC board
(A2P).
Electric symbol
A5P
A6P, A7P
A4P, A7P
A6P, A9P
A4P
A5P
A4P
A5P, A7P
Si37-701
Troubleshooting