3
Weak air from air curtain,
and higher cabinet
temperature
1. Evaporator blocked by frost.
2. Inside fan damaged.
3.Too low set point
of
temperature controller.
4.Vent blocked by storage
1.
Increase melting frequency.
2. R
eplace the fan.
3.
Adjust the set point.
4. R
emove the storage.
4
Normal air curtain,
but higher cabinet
temperature
1. Insufficient refrigerant.
2.Too high set point
of
temperature controllers.
3.Expansion value fails.
4.Thewind curtain disturbed by
strong air flow.
5. Ambient temperature or
humidity beyond standards.
1. R
efill the refrigerant.
2.
Adjust the set point for the
temperature controller.
3. R
epair or replace the
expansion
valve.
4. R
emoving the disturbing factors.
5.
Improve the conditions.
5
M
M
elting water overflown
1. Defrost Heater
for
melting
water damaged
2.
Water-level
controller failure.
3.
Ambient temperature or
humidity beyond standards.
1. R
eplace the heating pipe.
2. R
eplace the water-level
controller.
3. Improve
the conditions.
6
Normal air curtain, but
periodical fluctuation of
cabinet temperature
of
1.
Condenser contaminated.
2.
Poor venting of the unit.
3. H
eatprotection compressor
failure.
4.
Expansion valve blocked
by
ice
5.
Expansion valve failure.
6.
Temperature controller failure.
1.
Clean the condenser.
2.
Improve the venting conditions.
3.
R
R
eplace the heat protection.
4.
R
R
eplace the drying filter.
5.
R
R
eplace the expansion valve.
6.
R
R
eplace the
temperature
controller.
Number
Troubles
Causes
Solutions
1
Strange noise under the
bottom shelf
Fan blade broken.
Power off and fix the blade.
2
Non-refrigerating in spite of
normal operation
1.
Unit off.
2. M
elting process.
3. R
efrigerant leaking
4.
Unit failure.
1. Power on.
2. Stop melting.
3. Patch the leak and refill
refrigerant.
4. Call for professionals.
Frequent Troubleshooting
