Universal UCS Series - Page 8

Universal Chilling Systems, LLC.
8
Manual Model 10 Air Cooled Chiller
6. Troubleshooting
Troubles
Causes
Solutions
Cannot start
1. Power supply is not available or
voltage too low
1. Clear the electrical trouble, and provide the
power supply on requirement
2. Wrong Temperature set, the contactor
is always off
2. Make correct temperature set
3. Over load protection not recovered
after cut off
3. Press the recovery button
High pressure too
high
1. Too dirty of the condensers
1. Clean the condensers
2. Too much refrigerant filled
2. Discharge some refrigerant
3. The expansion valve opens too small
3. Adjust the opening of the valve
Low pressure too
low
1. Too little of the refrigerant.
1. Leakage check, increase refrigerant and
adjust the valve
2. Blockage of the filter.
2. Clean or change the filter
3. The expansion valve opens too small
3. Adjust the opening of the valve
Frosty of suction
line and/or
compressor
1. The expansion valve opens too large
1. Adjust the opening of the valve
2. Too much refrigerant filled
2. Discharge some refrigerant
3. Load too small
3. Increase the load