Daikin VRV-WIII RWEYQ72PTJU Service Manual page 240

Troubleshooting by Indication on the Remote Controller
232
Diagnosis Flow 2
Check of error 3 Check of error 4
Check if
the refrigerant type
of the condensing unit
corresponds to that of
the indoor unit.
NO
Diagnosis Flow 3
Check of error 3 Check of error 4
Check if
the condensing unit
PCB is replaced with spare
parts PCB.
YES
Is a correct
spare PCB procured?
YES
Is the setting of spare
PCB correct?
YES
Diagnosis Flow 4
Check of error 3 Check of error 4
Is the
wiring between the
condensing unit and Branch
Selector unit
correct?
YES
YES
Check if
the unit is not
NO
connected to condensing
units of different
models.
YES
NO
NO
NO
SiUS30-1301
Replace the condensing unit
main PCB.
Match the refrigerant types of the
condensing unit and the indoor
unit.
NO
Replace the condensing unit
main PCB.
Check the model of the
condensing unit.
Replace it with correct spare
PCB.
Correct the setting to reset
the power.
Replace the spare PCB.
Correct the wiring.
Replace the condensing unit
PCB.
Service Diagnosis