Daikin ZQG71~140L7V1B Service Manual page 162

Troubleshooting by Remote Controller
Troubleshooting
Caution
Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred.
After turning OFF the power and
stopping the compressor for 10
minutes, check the items below.
[In cooling]
Are the characteristics
of the outdoor unit
intermediate thermistor
normal?
YES
Turn the power ON and restart.
CHECK 2 Refer to P.196.
CHECK 8 Refer to P.201.
150
Is the stop valve open?
YES
Are the
connection of the
connector on PCB and the
connection to the switch unit
normal?
YES
Is there continuity in the
high pressure switch?
YES
Is there continuity in the
high pressure switch
connecting line?
YES
[In heating]
NO
characteristics of the
indoor unit intermediate
thermistor normal?
H3
" " is displayed?
NO
CHECK 2
High pressure is too high.
NO
NO
NO
NO
NO
Are the
NO
YES
YES
YES
ESIE12-06
Open the stop valve.
Correctly connect.
Replace the high pressure
switch with no continuity.
Replace the connecting line.
Replace the outdoor unit
intermediate heat exchanger
thermistor.
Replace the indoor unit
intermediate heat exchanger
thermistor.
Replace the high pressure
switch.
CHECK 8
Replace the outdoor unit PCB
(A2P).
If error is displayed again,
replace the inverter PCB (A1P).
Service Diagnosis