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damaged, the electric control board
should be replaced.
E3
display at
off state
flicker 3/5
SEC
display
at
on/off
state
coil temp.
sensor fault
1
、
Check whether the resistance of the
sensor is normal (the resistance is 5КΩ
in the normal temperature 25
℃
), when
it is abnormal the sensor should be
replaced.
2
、
Check whether there is short circuit or
open circuit in the wire of the sensor,
and whether the plug is connected well,
whether there is welding off or rosin
joint on the electric control board, if
there is any, it should be repaired.
3
、
When the 1 and 2 are both normal, then
the components or integrated circuit is
damaged,
the
electric
control
board
should be replaced.
E4
display at
on/off
state
flicker 4/6
SEC
display
at off
state
outdoor unit
abnormal
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 coil pipe sensor is
normal)
whether the contact of the
inserter on the circuit board is well, the
coil pipe temperature sensor is fixed, the
evaporation of the indoor unit is well,
the key is to check the evaporator
temperature detected by the coil pipe
temperature sensor has reached the
cooling or heating temperature.
4
、
Check whether the surface of the
condenser is too dirty, it should be
cleaned when it is too dirty.
5
、
Check whether the capacitance of the
outdoor motor and the fan is damaged,
it
should
be
replaced
when
it
is
damaged.
6
、
If the above items are normal, the
electric control board should be replaced.
E5
PG
motor
display at
off state
flicker 5/7
SEC
display
at off
state
no feedback
signal of
indoor fan
1
、
Check whether two sets of plugs on the
outlet end of the motor have loosed
from the socket of the electric control
board, insert it firmly when loosing.
2
、
Check whether the indoor motor has
damaged, the motor should be replaced
when it is damaged
3
、
Check whether the controllable silicon a
