Daikin ZQG71~140L7V1B Service Manual page 199

ESIE12-06
Troubleshooting
Caution
Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred.
Are
the remote
controllers connected to
several indoor units?
NO
Is
the remote
controller wiring jumped
between indoor units?
NO
Is the
field setting for pair
system correct?
YES
Do
the micro-
computer normal
monitors (HAP) on all indoor
unit PCB blink?
YES
Turn OFF the power supply once,
and turn the power ON to restart.
Is it normal?
YES
Service Diagnosis
YES
YES
NO
Are
the wires
NO
between indoor-outdoor
correctly connected?
YES
Is the
power supply
for the option device connected
from 1 and 2 of X2M?
YES
Is the
power supply PCB
correctly connected?
YES
Is 220
VAC between 1 and 2 of
X2M?
NO
Are
the wires between
NO
indoor-outdoor correctly
connected?
YES
Troubleshooting by Remote Controller
Adopt only one of the remote
controllers.
Remove the jumper.
(Group control in the same
system is not allowed.)
Set correctly.
NO
Connect correctly.
NO
Connect correctly.
NO
Connect correctly.
YES
Check the power supply system
inside the indoor unit.
Could be wrong wiring.
Check again.
NO
Connect correctly.
Replace the indoor unit PCB.
Normal
187