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