Function and Control
37
16. Communication malfunction
If the unit does not receive correct signal from indoor unit for 3min continuously, the unit will stop as communication malfunction
protection; if communication malfunction has removed and compressor has stopped for 3min, the unit will resume running.
17. IPM module protection
When the compressor starts, if there is overcurrent or low control voltage for IPM module due to some abnormal results, IPM will
detect module protection signal as the unit is on. Once the module protective signal is detected, stop the unit with module
protection immediately. If the module protection is removed and compressor has stopped for 3min, the unit will be allowed to
operate.If the module protection continuously occurs for three times, it can not be removed automatically, and you should press
the ON/OFF button to resume operation. If the running time of compressor exceeds 10 min, the module protection times will be
cleared.
18. Module overheating protection
18.1 If 80
℃
≤Tmodule, running frequency of compressor will be decreased or stop increasing;
18.2.If 95
℃
≤Tmodule, the unit will stop; if Tmodule
＜
87
℃
, and compressor has stopped for 3min, the unit will resume running;
18.3 If the unit stops as module overheating protection occurs for 6 times, it can not resume running automatically and
malfunction will be displayed, it can resume by pressing ON/OFF. During operation, if the time exceeds compressor running time,
the time of module overheating protection stop will be cleared. When the unit is off or shifts to fan mode,the malfunction and
malfunction times will be cleared. (If the malfunction can not be removed).
19 Compressor overload protection
19.1 If detect that the overload switch breaks within continuous 3S, the system will stop as protection;
19.2 If detect that the protection has removed and the compressor has stopped for 3min, the unit will be allowed to operate.
19.3 If the unit stops as compressor overload protection occurred for 3 times continuously, it can not resume running
automatically and malfunction will be displayed.
It can resume operation by pressing ON/OFF button; and the times of compressor overload protection will be cleared after the
compressor has run for 30min.
