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. Replace the fan.
3. Adjust the set point.
4. Remove 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. Refill the refrigerant.
2.Adjust the set point for the
temperature controller.
3. Repair or replace the
expansion valve.
4. Removing the disturbing factors.
5. Improve the conditions.
5 MMelting water overflown
1. Defrost Heater for
melting water damaged
2.Water-level controller failure.
3.Ambient temperature or
humidity beyond standards.
1. Replace the heating pipe.
2. Replace 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. Heatprotection 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. RReplace the heat protection.
4. RReplace the drying filter.
5. RReplace the expansion valve.
6. RReplace 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. Melting process.
3. Refrigerant leaking
4. Unit failure.
1. Power on.
2. Stop melting.
3. Patch the leak and refill
refrigerant.
4. Call for professionals.
Frequent Troubleshooting
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