Service Diagnosis
51
10.4.12
High work-intense protection
Outdoor display
E 9 LED1 flash 21 times
High work-intense control is activated in the heating mode if the temperature
being sensed by the heat exchanger thermistor exceeds the limit.
Activated when the temperature being sensed by the heat exchanger
rises above 65
℃
twice in 30 minutes
■
Faulty electronic expansion valve
■
Dirty heat exchanger
■
Faulty heat-exchange sensor
■
Insufficient gas
* Caution: Be sure to turn off power switch before connect or disconnect connector, or
parts damage may be occurred.
Trouble
shooting
Supposed
Causes
Malfunction
Decision
Conditions
Method of
Malfunction
Detection
The malfunction is reported
after the machine has run
for some time?
The indoor unit blows
poorly due to blocked
filters or poor condition of
the fan?
Use some tools to measure the pressure of system
Clean the filters
Reinstall the fan.
Check room temperature and pipe
temperature sensor.
Monitor the temperature of indoor
PCB circuits.
Electrify the machine again and turn it
on with the remote control, check
whether the wind temperature is below
65
℃
YES
NO
YES
NO
