Daikin VRV-WIII RWEYQ72PTJU Service Manual page 232

Troubleshooting by Indication on the Remote Controller
224
Diagnosis Flow 1
Check of error 3 Check of error 4
Check
if any
disconnection or
connection error is
detected in relay wires with
external control adaptor
for condensing
unit.
YES
Check if
the normal
condition monitor LED
for the condensing unit
PCB blinks.
YES
Check
if the normal
condition monitor
LED for the external
control adaptor for
condensing unit
blinks.
YES
NO
Check if
NO
power is supplied to the
condensing units.
YES
Check if
the power supply
wire for the external
NO
control adaptor for
condensing unit is
connected to 5V
supply
line.
YES
SiUS30-1301
Correct the connecting wiring
with the external control adaptor
for condensing unit.
NO
Supply the power to the
condensing unit.
Replace the condensing unit
main PCB.
NO
Connect the power supply wire
for the external control adaptor
for condensing unit to 5V supply
line.
Replace the PCB of the
external control adaptor for
condensing unit.
Replace the condensing unit
main PCB.
Service Diagnosis