Daikin VRV II RXYQ5MATL Service Manual page 228

Si39-504
Troubleshooting
∗K2: Magnetic relay in PC board (A2P)
Troubleshooting
Be sure to turn off power switch before connect or disconnect connector,
Caution
or parts damage may be occurred.
Is the
voltage of power
NO
supply 380V (YL)
or 220V (TL)?
YES
Turn on again.
Does K2 ∗
NO
turned on?
YES
The voltage
between the P2
NO
(or P3) and N3 terminals
is 380 VDC (YL) /
220 VDC (TL) or
more when the
compressor is
running.
YES
Troubleshooting by Indication on the Remote Controller
Does
the voltage
between terminals
YES
P2(or P3) and N3 gradually
rise to 556 VDC (YL)
or 283 VDC (TL)
after turning
on?
NO
Is
220 ~ 240 V
YES
at the connector X1A of
inverter PC
board.
NO
Is
220 ~ 240 V
NO
at the connector X1A of
outdoor PC board
(A1P)
side?
YES
Correct power supply.
Replace the inverter PC
board.
Replace the inverter PC
board.
Replace the outdoor unit
PC board (A1P).
Check the transmission
wiring between the
outdoor unit PC board
and inverter unit.
Replace the inverter
PC board.
Monitor field power
supply.
(V2821)
217