31
damaged, replace the controllable silicon or electric
control board when they are damaged.
E6
PG motor
display at
off state
flicker 6/8
SEC
display
at off
state
no over zero
signal
1、Firstly check whether the indoor fan is normal.
2、Check whether the signal outputting from the
integrated chip of the electric control board is
normal, the electric control board should be
replaced when the signal is abnormal.
E7
display at
off state
flicker 7/9
SEC
display
at off
state
outdoor
feedback fault
1、Check whether the winding resistance and operation
current of the compressor are normal
2、Check whether the high and low pressure is normal
when the unit is running.
3、Check whether the indoor and outdoor wiring is
right; when it is wrong, connect them again
according to the circuit diagram
4、 Check whether the contact of the inserter on the
circuit board and the connection are well, otherwise
repair.
5、Check whether the signal feedback wire is
disconnected, replace or connect the feedback
signal wire.
6、Check whether the supply power is phase-lacking or
phase opposition.
7、Check whether the AC electromagnetic contactor is
well.
E8
display at
off state
flicker 8/10
SEC
display
at off
state
frost
protection/over
heat protection
1、Check whether the filter of the indoor unit is dirty or
blocked, and clean if it is dirty.
2、Check whether the indoor fan is running normally,
and replace the motor if it is abnormal.
3、Check whether indoor pipe temperature sensor is
normal, and replace the sensor if it is abnormal.
4、Check whether the system pressure is normal, if
abnormal, should check whether there is leakage,
and fill the refrigerant again.
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