88 PB
Overload in heating mode
The root cause Corrective measure
1 The refrigerant is excessive.
Discharge the refrigerant, and recharge
the refrigerant referring to the rating label.
2 The indoor ambient temperature is too high. Please use it within allowable temperature range.
3
Short‑circuit occurs in the air outlet and air
inlet of the indoor unit.
Adjust the installation of the indoor unit referring
to the user manual.
4 The indoor filter is dirty. Clean the indoor filter.
5 The speed of the indoor fan motor is too low. Check the indoor fan motor and fan capacitor.
6
The indoor fan is broken or the outdoor fan
is blocked.
Check the indoor fan.
7 The air inlet and outlet have been blocked. Remove the obstructions.
8 The expansion valve fails. Replace the expansion valve.
Overload in cooling mode
The root cause Corrective measure
1 The refrigerant is excessive.
Discharge the refrigerant, and recharge
the refrigerant referring to the rating label.
2 The outdoor ambient temperature is too high. Please use it within allowable temperature range
3
Short‑circuit occurs in the air outlet and air inlet of
the outdoor unit.
Adjust the installation of the outdoor unit
referring to the user manual.
4
The outdoor heat exchanger is dirty, such
as condenser.
Clean the heat exchanger of the outdoor unit,
such as condenser.
5 The speed of the outdoor fan motor is too low. Check the outdoor fan motor and fan capacitor.
6
The outdoor fan is broken or the
outdoor fan is blocked.
Check the outdoor fan.
7 The air inlet and outlet have been blocked. Remove the obstructions.
8 The expansion valve fails. Replace the expansion valve.
TROUBLESHOOTING
Diagnostic Codes ‑ Outdoor Unit
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