Daikin GQI-Eco Series, Service Manual

Page: 157 / 215

ESIE15-13B Troubleshooting by Remote Controller
Service Diagnosis 143
Troubleshooting
Refer to P.185.
Refer to P.189.
Caution
Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred.
NO
NO
YES
YES
YES
YES
NO
NO
YES
NO
NO
NO
YES
YES
Open the stop valve.
Connect the connector properly.
Connect the connector properly.
Replace the group thermistor.
Replace the indoor unit intermediate
thermistor.
Replace the outdoor unit PCB (A1P).
Correct the refrigerant system defect.
Is the stop valve open?
Is it in cooling operation?
YES
(In cooling
operation)
(In heating
operation)
Remove the thermistor from the
outdoor unit PCB and measure the
resistance.
Remove the thermistor from the indoor
unit PCB and measure the resistance.
Is it normal?
Is it normal?
Is low pressure
abnormally low?
NO
Replace the low pressure switch.
Is there continuity in the
low pressure switch?
Is the indoor
unit intermediate thermistor
properly connected to the
indoor unit PCB?
CHECK 1
CHECK 1
Is
the heat
exchanger intermediate
thermistor (connector : X12A)
properly connected to the
outdoor unit PCB?
CHECK 3
CHECK 1
CHECK 3