Haier AS25THMHRA-C Service Manual page 516

10.3.12 High work-intense protection
Outdoor display
Method of High work-intense control is activated in the heating mode if the temperature
Malfunction being sensed by the heat exchanger ther
Detection
Malfunction Activated when the temperature being sensed by the heat exchanger
Decision rises above 65℃ twices in 30 minutes.
Conditions
■ Faulty electronic expansion valve
Supposed
■ Dirty heat exchanger
Causes
■ Faulty heat-exchange sensor
■ Insufficient gas
Troubleshooting * Caution Be sure to turn off power switch before connect or disconnect connector,
Electrify the machine again and turn it on with the
remote controller,
temperature is below 65℃
The malfunct
after the machine has run
for some time?
T he indoor unit blows poorly
●
due to blocked filters or poor
condition of the fan?
Use some tools to measure the pressure of system，
LED1 flash 21 times
parts damage may be occurred.
check whether the
ion is reported
●
NO
NO
mistor exceeds the limit.
●
wind
1 、 Check room temperature and
YES
pipe temperature sensor.
2、 the temperature monitoring circuit
of the indoor mainboard
YES
1) Clean the filters
2) Reinstall the fan.
45
Service diagnosis
●
or else
Domestic air conditioner