Daikin REYQ8-48PY1B - 3.58 “UE” Malfunction of Transmission between Centralized Controller and Indoor Unit

SiBE37-701_B Troubleshooting by Indication on the Remote Controller
Troubleshooting 354
Troubleshooting
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Confirmation of malfunction 3 Confirmation of malfunction 4
Diagnosis Flow 3
Correct the connecting wires and
then reset the power supply.
Check the connection status of
connecting wires of SLAVE 1 with
MASTER. Check if the wiring is
disconnected or is about to be
disconnected.
NO
YES
Replace the outdoor unit main
PCB of the SLAVE 1.
Confirmation of malfunction 3 Confirmation of malfunction 4
Diagnosis Flow 4
Correct the connecting wires and
then reset the power supply.
Check the connection status of
connecting wires of SLAVE 2 with
MASTER. Check if the wiring is
disconnected or is about to be
disconnected.
NO
YES
Replace the outdoor unit main
PCB of the SLAVE 2.
Confirmation of malfunction 3 Confirmation of malfunction 4
Diagnosis Flow 5
Remove the connecting wires and
then reset the power supply.
Check if the outdoor
unit REYQ8~16PY1 is
connected to multi-
system.
NO
YES
Replace the main PCB of the
outdoor unit.