8 | Troubleshooting Guide | ||
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Problem | Cause | Solution |
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Chiller will not run. |
| Check main disconnect |
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| No power. | fuses, wiring, and power |
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| lead to the unit. |
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| Wrong voltage supplied to | Voltage must be within plus |
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| or minus 10% of the |
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| the chiller. |
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| nameplate rating. |
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| Defective on/off switch. | Replace. |
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| Control circuit fuse blown. | Replace, check the |
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| transformer. |
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| Defective control | Replace. |
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| transformer. |
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Pump runs, compressor | No process load on the | Increase the process load. |
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cycles at short intervals. | chiller. |
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| Refrigerant is low. | Check the refrigerant |
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| charge. |
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The leaving water | Refrigerant is low. | Check the refrigerant |
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temperature is too high. | charge. |
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| Make sure that the coolant |
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| solution is right for the |
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| Improper water/glycol | process — must be 75% |
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| solution. | water and 25% glycol. |
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| See Figure 6 on page 16 |
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| for more information. |
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Pump pressure is low (see | Check for foreign matter. | Clean the system. |
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pump curves). |
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Pump pressure is too high. |
| Check for partially closed |
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| Restricted water flow. | valves, etc. Be sure all |
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| lines are properly sized. |
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SMC Series Chillers | Page 37 |
