Daikin REYQ8-48PY1B - 4. Troubleshooting (OP: Centralized Remote Controller); 4.1 “M1” PCB Defect

SiBE37-701_B Troubleshooting by Indication on the Remote Controller
Troubleshooting 360
Troubleshooting
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Replace the main PCB of the
outdoor unit.
• With individual systems, replace
the control PCB 1 (A1P) or the
control PCB 3 (A3P).
• With multi systems, replace the
main PCB (A1P).
Confirmation of malfunction 3 Confirmation of malfunction 4
YES
NO
YES
NO
Diagnosis Flow 1
Confirmation of malfunction 3 Confirmation of malfunction 4
Diagnosis Flow 2
The number of indoor
units connected to the
same refrigerant circuit
system should not be
more than 64 units.
The number of indoor units
exceeds the standard. Check the
connection to correct.
Check if the refrigerant
type of the outdoor unit
corresponds to that of the
indoor unit.
Replace the main PCB of the
outdoor unit.
• With individual systems, replace
the control PCB 1 (A1P).
• With multi systems, replace the
main PCB (A1P).
Match the refrigerant types of the
outdoor unit and the indoor unit.