Current Protection; Drop Off Voltage; Communication Malfunction; Ipm Module Protection - Toyotomi GAN-A180GVR Service Manual

(12) Current protection

1. If 12A I alternating-current, running frequency of compressor will be decreased or stop to increase will be occurred;
2. If 17A I alternating-current, the unit will stop; and compressor has stopped for 3min, the unit will resume running;
3. If the unit stops as compressor discharge temperature for 6 times, it can not resume running automatically and display malfunction, it can resume by
pressing ON/OFF. During operation, if the time exceeds compressor running time, the time of compressor discharge temperature stop will zero clearing.

(13) Drop off voltage

During compressor operation, the system will stop and malfunction of drop off voltage if voltage downward fluctuates rapidly, and it will re-start up
automatically 3min later.

(14) 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 resume and compressor has stopped for 3min, the unit will resume running.

(15) IPM module protection

When the compressor starts, if there is overcurrent or control voltage low for IPM module as 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
resumed and compressor has stopped for 3min, the unit will be allowed to operate. If the module protection continuously occurs for three times, it should
not be resumed automatically, and you should press the ON/OFF button to resume. If the running time of compressor exceeds the [t Protection times
clearing of module], the module protection is cleared to recount.
(16) Module overheating protection
1. If Tmodule, running frequency of compressor will be decreased or stop to increase will be occurred;
2. If Tmodule, the unit will stop; if Tmodule , and compressor has stopped for 3min, the unit will resume running;
3. If the unit stops as module overheating protection for 6 times, it can not resume running automatically and display malfunction, it can resume by
pressing ON/OFF. During operation, if the time exceeds compressor running time, the time of module overheating protection stop will zero clearing. When
the unit is off/ shifts to fan mode, the malfunction and malfunction times will zero clearing. (If the malfunction can not resume, the shifting mode can clear
malfunction.)
(17) Compressor overload protection
1. If the switch of compressor overload de-energized is detected for 3S continuously, the system will stop as protection;
2. If the overload protection is resumed and compressor has stopped for 3min, the unit will be allowed to operate.
3. If the unit stops as compressor overload protection occurred for 3 times continuously, it can not resume running automatically and display malfunction,
it can resume by pressing ON/OFF; and the times of compressor overload protection will be cleared after the compressor has run for 30min.