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70
15.4.16 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
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.
Clean the air filter.
Is the air filter dirty?
Check the dust accumulation on the indoor unit heat exchanger.
Is the indoor unit heat exchanger dirty?
Is the measured resistance of the indoor pipe temperature
thermistor matches the value specified in its characteristic
chart?
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.
Clean the indoor unit heat exchanger
YES
NO
NO
Clean the indoor unit heat exchanger.
Defect in indoor pipe temperature
thermistor.
Replace the indoor pipe temperature
thermistor.
YES
YES
NO
Check the piping & installation
condition.
Replace piping / reinstall the unit if
necessary.
Caution
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