Daikin SkyAir GQI-Eco Series Service Manual page 134

Troubleshooting by Remote Controller
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
CHECK 1 Refer to P.165.
CHECK 3 Refer to P.169.
124
NO
NO
(In heating
operation)
the heat
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 low pressure
NO
abnormally low?
CHECK 3
YES
Is
NO
YES
NO
YES
SiBE281013
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.
Service Diagnosis