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197
TROUBLESHOOTING
18K, 24k and 36k outdoor
overload in cooling mode
sr. The root cause
Corrective measure
1
The refrigerant is excessive
NOTE 1:
If the indoor unit can not turn on or the indoor unit turns itself off after 30s, and at the same time the unit
does not display the fault code, please check the fire and the socket of the control board.
Note 2:
If the indoor unit display the 75,76,77,78 fault code after you turn on the unit, please check the
TEST seat of the indoor control board or the TEST detection circuit whether exists short circuit.
Note 3:Overload in cooling mode
2
Discharge the refrigerant, and recharge the
refrigerant refer to the rating label
The outdoor ambient temperature is too high
3
Please use within allowable temperature range
The air outlet and air inlet of the outdoor unit is
short-circuit
4
Adjust the installation of the outdoor unit refer to
the user manual
The outdoor heat exchanger is dirty, such as
condenser
5
Clean the heat exchanger of the outdoor unit, such
as conden ser
The speed of the outdoor fan motor is too low
6
Check the outdoor fan motor and fan capacitor
Check the outdoor fan
7
The outdoor fan is broken or the outdoor fan is
blocked
The air inlet and outlet has been blocked Remove the blocked thing
8
The expansion valve or the capillary is failure Replace the expansion valve or the capillary
Note 4:Over load in heating mode
Overload in heating mode
sr. The root cause
Corrective measure
1 The refrigerant is excessive
2
Discharge the refrigerant, and recharge the
refrigerant refer to the rating label
The indoor ambient temperature is too high
3
Please use within allowable temperature range
The air outlet and air inlet of the indoor unit is
short-circuit
4
Adjust the installation of the indoor unit refer to the
user manual
The indoor filter is dirty
5
Clean the indoor filter
The speed of the indoor fan motor is too low
6
Check the indoor fan motor and fan capacitor
Check the indoor fan
7
The indoor fan is broken or the outdoor fan is
blocked
The air inlet and outlet has been blocked Remove the blocked thing
8
The expansion valve or the capillary is failure Replace the expansion valve or the capillary
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