Chigo 38B Service Manual page 97

off state
display at flicker 3/5
E3
off state
display at
flicker 4/6
E4 on/off
state
PG motor
flicker 5/7
E5 display at
off state
SEC at on/off
state
display
at on/off
SEC
state
display
at off
SEC state
display
at off signal of indoor
SEC
state
sensor fault (the resistance is 5КΩ in the normal temperature
25 )
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.
1、Check whether the resistance of the sensor is normal
(the resistance is 5КΩ in the normal temperature
25 )
replaced.
2、 Check whether there is short circuit or open circuit in
coil temp. the wire of the sensor, and whether the plug is
sensor fault 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.
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
outdoor unit
detected by the coil pipe temperature sensor has
abnormal
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.
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.
no feedback
2、Check whether the indoor motor has damaged, the
motor should be replaced when it is damaged
fan
3、 Check whether the controllable silicon and other
components on the electric control board have
30
℃ , when it is abnormal the sensor should be
℃ , when it is abnormal the sensor should be