１
Cooling System Fault
■
Troubleshooting
Is Compressor current same as data marked on Rated Label?
1. Cut off Discharge Tube and Service Tube,;
2. Charge 0.8
—
1MPa High-pressure Nitrogen.
Does air flow feel?
Note
：
It is not allowed to run the unit too long after
tubes cut off, in case of humidity air absorbed by
Compressor.
No
No
I
s Refrigerant enough,
not less than 90% of data
marked on Rated Label
Compressor itself is
broken, replace is
necessary.
1.Condenser Coil
or
Anti-dew
Tube is
choked.
2. Condenser,
Evaporator, Dry
Filter is broken.
The unit is
beyond repair, it
should be
scrapped.
Will the Wine Cooler reach
5
℃? (
after continuously running for 3hrs at ambient 32
℃)
Check Cooling System
No
YES
Cooling System works
well.
Visually inspect Fans, PCB, Temp. Senor and PTC Heater, is all OK?
No
Disassemble and Replace
faulty part as below mentioned.
Is Compressor running with unusual noise or
vibration?
Is Start Relay and Overload Protector OK?
No
Disassemble and
Replace faulty part as
below mentioned.
YES
YES
No
Replace faulty
part.
3. Anti-dew
Tube leaks
Re-solder tube or
replace faulty part.
Restart Compressor,
Does it work well?
Re-charge
Refrigerant
No
YES
Yes
Check Rubber Foot, Mounting
Screw and Capillary Tube.
YES
No
Disassemble and Replace
faulty part as below mentioned.
２
■
How to re-charge Refrigerant (R600a):
Step 1 Extract vacuum from Suction Tube (Low-pressure Tube) and Discharge Tube (Hi-pressure Tube) at the same
time, pls.refer to Figure 10,11,12.for location of tubes and solder joints.
Step 2. Vacuum extraction will take 20min with pressure less than
100Pa
;
Step3 . Re-solder Service Tube of Dry Filter under vacuum extracting condition;
Step 4 Re-charge Refrigerant into Service Tube of Suction, Refrigerant weight should be same as the data marked
on Rated Label.
Step 5. Re-solder Service Tube of Suction Tube.
■
Test After Repairing:
After repairing and run the unit for 3 hours at ambient temp. 32
℃
, if
1.actual temp. of inner cabinet is same as temp. set, and
2.the compressor will stop after unplugged with actual temp.of inner cabinet 2.5
℃
less than temp.set, and
3.the compressor will restart after plugged with actual temp.of inner cabinet 2.5
℃
more than temp.set.
then the cooling system can be confirmed in normal working condition.
Remark: if necessary, pls. record actual term. of inner cabinet by a temp. meter.
■
Baffle Board and Control Box Disassembly
1.For BU-22
Step 1: Open door fully (180
O
), Lift up Chrome Shelf and pull it outwards one by one
(Figure 1)
;
