Daikin R410As Service Manual page 213

Troubleshooting by Indication on the Remote Controller
Troubleshooting
202
Be sure to turn off power switch before connect or disconnect connector,
Caution
or parts damage may be occurred.
Is
connection
wire connected
NO
between the connector
X21A and X6A?
YES
Turn on again.
NO
Turn K1M ON.
YES
The
voltage
between the P and N
NO
terminals is 380 VDC (Y1)
or morewhen the
compressor is
running.
YES
Is
YES
220 ~ 240 V of
power reaching the
K1M coil?
NO
Does
the voltage
between terminals P
YES
and N gradually rise to 556
VDC (Y1) 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
side?
YES
Si39-302
Repair wiring.
Replace K1M.
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)
Troubleshooting