SERVICE MANUAL
Model: BD-429GAA
19
Issue 2009-03-09
Rev.
Ref0903S021V0
circuit problem inside the motor or the windings are burned.
8-2-9 Problem analysis and service
Problems
Reasons
Removing methods
Compressor
cannot be
started
1
1
.
.
Fuse is broken.
2
2
.
.
The contact of plug, socket, and cable is
not good. Cable broken.
3
3
.
.
The voltage is too low, 10-15% less than
rated voltage.
4
4
.
.
The knob of temperature controller is at
“rest” position.
5
5
.
.
The temperature controller is out of order.
6
6
.
.
Starting relay or thermal protection unit is
out of order or broken.
7
7
.
.
Wire broken of motor starting coil or
operation coil.
8
8
.
.
The compressor motor is burned or
rotator and stator are blocked to dead.
9
9
.
.
There is leakage of high-pressure gas
valve or the shaft is embraced to dead.
1
1
.
.
Check if there is short circuit
and solve it, if not, change
capable fuse.
2
2
.
.
Check and connect tightly, or
change.
3
3
.
.
Use till voltage rises to rated
value or attach a stabilizer.
4
4
.
.
Rotate the knob to wanted
position for suitable
temperature.
5
5
.
.
Change the controller.
6
6
.
.
Change starting relay or
thermal protection unit.
7
7
.
.
Measure using R×1 position
of avometer, if there is wire
broken, change compressor.
8
8
.
.
Change
compressor.
9
9
.
.
Change
compressor.
Compressor
starts too
frequent,
operation
time too
long, but
temperature
drop in
cabinet is
too slow
1
1
.
.
The distance between temperatures
sensing tube of temp. Controller and
evaporator are too big.
2
2
.
.
The temperature controller is out of order.
3
3
.
.
Food stuffs in the cabinet too much, door
opens too frequent and open time too
long.
4
4
.
.
The environment temperature is too high,
humidity too high, airflow is impeded.
5
5
.
.
The refrigerant is insufficient or leakage.
6
6
.
.
Compressor efficiency is reduced.
7
7
.
.
The drying filter is blocked.
1
1
.
.
Adjust and make it close to
evaporator cover.
2
2
.
.
Change the temperature
controller.
3
3
.
.
Reduce
them.
4
4
.
.
Put the cabinet to suitable
place and make air circulate
well.
5
5
.
.
Check or supplement
refrigerant.
6
6
.
.
Change
compressor.
7
7
.
.
Change new drying filter.
