Daikin GQI-Eco Series Service Manual page 157

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