Troubleshooting Refrigeration System
COMPRESSOR DOES NOT | • Ice bank sufficient. | • Refrigeration not called for. |
OPERATE. |
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•Unit power cord unplugged or control board power switch in “OFF” position.
•Plug in power cord or place switch in “ON” position.
•No power source (blown fuse or tripped circuit breaker).
•Replace fuse or reset circuit breaker (note: Fuse or circuit breaker are not part of unit).
•Low voltage at compressor ter- minals.
•Voltage must be at least 103 volts at the compressor termi- nals when compressor is trying to start.
| • Loose, disconnected or broken | • Tighten connections or replace | ||
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| wiring. |
| broken wiring. |
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| • Overload protector cut out; over | • Compressor will cool enough to | ||
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| heated compressor. Con- |
| restart. Do not overdraw cool- |
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| denser fan motor not operating |
| ing capacity of unit. Refer to |
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| as required. |
| “CONDENSER FAN MOTOR |
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| NOT OPERATING” in this sec- |
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| tion. |
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| • | Inoperative overload protector | • Replace inoperative part as | |
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| or start relay. |
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| • Inoperative ice bank control. | • Replace ice bank control. | ||
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| • | Inoperative compressor. | • | Replace compressor. |
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COMPRESSOR WILL NOT STOP | • | Inoperative thermistor. | • | Replace thermistor. |
AFTER SUFFICIENT ICE BANK |
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IS FORMED. |
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| • Damaged ice bank control wire. | • Repair ice bank control. | ||
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| • | Inoperative control board. | • | Replace control board. |
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COMPRESSOR OPERATED | • | Cooling capacity is exceeded | • Reduce amount of drinks drawn | |
CONTINUOUSLY BUT DOES |
| by overdrawing. |
| per given time. |
NOT FORM SUFFICIENT ICE |
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BANK. |
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| • Unit located in excessively hot | • Relocate unit or determine and | ||
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| area or air circulation through |
| correct condenser coil restric- |
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| condenser is restricted. |
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| • | Refrigeration system leak. | • | Repair refrigeration system. |
NOTE: The ice bank freezes from the bottom of the evaporator upward. A refrigerant leaks or insufficient charge might show an ice bank at bottom and not at the top of evaporator.
NOTE: If overload protector cuts our compressor, condenser fan motor will continue to operate, otherwise, troubleshooting condenser fan motor problems are the same as “COMPRESSOR DOES NOT OPERATE” paragraph plus the preceding.
CONDENSER FAN MOTOR NOT | • Jumper cord loose or discon- |
OPERATING. | nected from motor or terminal |
| block. Broken wire in cord. |
•Tighten connections or replace cord.
• | Fan blade obstructed. | • Remove obstruction. |
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• | Inoperative condenser fan | • Replace condenser fan motor. |
| motor. |
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AGITATOR MOTOR NOT OPER- • | Unit power cord or refrigeration | • Plug in power cord. |
ATING. | system power cord unplugged. |
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© 2003, IMI Cornelius Inc. | - 13 - | Publication Number: 859000159INS |
