Air-Con 38B Service Manual page 30

on state
display at flicker 1/3
off state
display at flicker 1/1
E2
off state
display at flicker 3/5
E3
off state
display at flicker 4/6
E4
on/off state
SEC
SEC
display at
on/off
SEC
state
display at
on/off
SEC
state
display at
off state
SEC
indication
1、 Normal (during heating mode )
anti cold wind
2、It will be removed when the coil pipe temperature
sensor reaches certain temperature.
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
room 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 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
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
operation current of the compressor are normal.
2、Check whether the high and low pressure is normal
outdoor unit
when the unit is running.
abnormal
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,
30
winding resistance and