mundoclima MUCO-H6T Service Manual page 45

Overcurrent
4 E5
protection
1. Unstable supply voltage. Normal
fluctuation shall be within 10% of the
rated voltage on the nameplate;
2. Supply voltage is too low and load is
too high;
3. Measure the current of live wire on
mainboard. If the current isn't higher than
the overcurrent protection value, please
During cooling and drying
check the mainboard;
operation, compressor and
4. The indoor and outdoor heat
ODU fan motor stop while
exchangers are too dirty, or the air inlet
IDU fan motor operates.
and air outlet are blocked;
During heating operation,
5. The fan speed of fan motor is too low
all loads stop.
or the fan motor doesn't run;
6. The compressor is not running
normally. There is abnormal sound, oil
leakage or the temperature of the shell is
too high, etc;
7. There's blockage in the system (filth
blockage, ice blockage, greasy blockage
or valve hasn't been opened completely).
45
Service Manual
Refer to Malfunction
Detection Flowchart