Daikin VRV III REYQ8PY1 Service Manual page 328

Si37-701
Troubleshooting
Troubleshooting
Be sure to turn off power switch before connect or disconnect connector,
Caution or parts damage may be occurred.
Diagnosis Flow 1
Check 3 Check 4
Check if
any disconnection or
connection error is detected in
connecting wires with
outside control
adapter.
NO
Check if
the normal condition
monitor LED for the outdoor
unit PC board
blinks.
YES
Check if
the normal condition monitor
LED for the outside control
adapter blinks.
YES
Troubleshooting by Indication on the Remote Controller
YES
Check if power
NO
is supplied to the
outdoor units.
YES
Check if
the power supply
NO
wire for the outside control
adapter is connected to
5V supply
line.
YES
Correct the connecting wiring
with the outside control adapter.
NO
Supply power to the outdoor
unit.
Replace the outdoor unit main
PC board.
NO
Connect the power supply wire
for the outside control adapter
to 5V supply line.
Replace the PC board of the
outside control adapter.
Replace the outdoor unit main
PC board.
317