Daikin RQYQ140-180PY1 Service Manual page 186

Troubleshooting by Remote Controller
Troubleshooting
177
Be sure to turn off power switch before connect or disconnect connector,
Caution
or parts damage may be occurred.
Diagnosis Flow 3
Confirmation of malfunction 3 Confirmation of malfunction 4
Check if the
outdoor unit PCB
is replaced with
spare PCB.
YES
Is a correct spare
PCB procured?
YES
Check if the spare
PCB setting is
correct.
YES
Diagnosis Flow 4
Confirmation of malfunction 3 Confirmation of malfunction 4
Wrong connection malfunction
Are indoor units
only for VRV (Is
any residential one
included?)
YES
Check if the unit
NO NO
is not connected
to outdoor units
of different
models.
YES
NO
NO
NO
SiBE341001
Replace the main PCB of the
outdoor unit.
Check the model of the outdoor
unit.
Replace it with the correct spare
PCB.
Correct the setting to reset the
power.
Replace the spare PCB.
Exclude residential indoor units
from the system.
Replace the outdoor unit PCB.
Troubleshooting