135
17.4.17 H98 (Error Code Stored in Memory and no alarm is triggered / no TIMER LED
flashing)
Malfunction Decision Conditions
Indoor high pressure is detected when indoor heat exchanger is detecting very high temperature when the unit is
operating in heating operation.
Phenomena: unit is stopping and re-starting very often in heating mode.
Malfunction Caused
Indoor heat exchanger thermistor.
Clogged air filter or heat exchanger.
Over-bent pipe (liquid side).
Troubleshooting
Is the measured resistance of the indoor pipe temperature
thermistor matches the value specified in its characteristic
chart?
Check the indoor unit intake air filter.
When abnormality indication starts again.
For safety reason and to prevent
component breakdown, always switch
off the power before remove and
connect the component.
YES
NO
NO
NO
YES
Check the indoor pipe temperature thermistor:
Plug out connector (CN-TH) from the indoor unit PCB.
Measure the resistance of the indoor heat exchanger
temperature thermistor.
Is the air filter dirty?
Check the dust accumulation on the indoor unit heat exchanger.
Is the indoor unit heat exchanger dirty?
Clean the air filter.
Check the piping & installation condition.
Replace piping / reinstall the unit if
necessary.
Defect in indoor pipe temperature
thermistor.
Replace the indoor pipe temperature
thermistor.
YES
Clean the indoor unit heat exchanger.
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