Daikin VRV-WIII RWEYQ72PTJU Service Manual page 233

SiUS30-1301
Service Diagnosis
Diagnosis Flow 2
Check of error 3 Check of error 4
Cool/Heat
selection is unified.
YES
Setting of
C/H SELECT of
the external control
adaptor for condensing unit
is "unified MASTER".
NO
Setting
of C/H
SELECT of the
external control adaptor for
condensing unit is
"SLAVE".
YES
Check
if the normal
condition monitor
LED for the condensing
unit main PCB blinks.
YES
Check if
the normal
condition monitor
LED for the external
control adaptor for
condensing unit
blinks.
YES
Set
the C/H
SELECT of
the external control
adaptor for condensing
unit to "IND". Then check if
the error occurs again.
YES
Troubleshooting by Indication on the Remote Controller
NO
YES
NO
Check if
NO
power is supplied to
the condensing unit.
YES
Check if
the power
supply wire for the
NO
external control adaptor
for condensing unit is
connected to 5V
supply line.
YES
NO
C/H SELECT of the external
control adaptor for condensing
unit is set to "IND".
The unified addresses for
COOL/HEAT within the
condensing-condensing
transmission are duplicated.
Set the address again.
Replace the condensing unit
main PCB.
NO
Supply the power to the
condensing unit.
Replace the condensing
condensing
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.
225