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| Water cooled condenser valve | Verify cooling valve operation. |
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| stuck open |
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| Fan VFD output at 100% | Verify VFD is in remote versus |
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| manual operation. Verify |
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| controller output to VFD. |
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| Low process fluid flow | and adjust if necessary |
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| Verify system valve operation |
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| Low Fluid Temp Fault | 9 | CC | Plugged | Clean |
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| down valve or cleaning internal |
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| strainer. |
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| System low on refrigerant | Contact Customer Service |
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| Liquid line valves closed | controller and valve |
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| Verify wiring or output between |
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| Chilled fluid setpoint too | Adjust setpoint or fluid |
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| Low Suction Pressure Fault | 10 | CC | close to freeze protection | freezepoint temperature (will |
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| setpoint. |
| require adding glycol to fluid) |
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| Process fluid flow rate too | Verify system valve operation |
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| low. |
| and adjust if necessary |
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| Thermal expansion valve | Contact Customer Service |
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| failure. |
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| Low Superheat Fault (only will |
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| Thermal expansion valve | Contact Customer |
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| failure |
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| appear if optional sensor pack is | 11 | CC |
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| Temperature Sensor Failure | Verify sensor wiring between |
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| installed) |
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| controller and sensor. |
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| Sensor failure | Check the wiring connection at |
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| Suction Pressure Sensor Failure | 12 | CC | Electrical connection at |
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| sensor open | the sensor, and at the controller. |
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| Electrical connection at | If necessary replace sensor. |
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| controller open |
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| Sensor wires loose from | Check the wiring connection at |
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| Leaving Water Temp Sensor | 13 | SC | controller terminal block | the controller terminal block |
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| sensor and controller terminal | Replace Sensor |
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| Failure |
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| Sensor wires broke between |
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| block. |
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| Tank level too low | Add fluid if necessary. |
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| Verify tank level parameters. |
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| Low Level Fault | 14 | SC |
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| Optional water makeup valve | controller and makeup valve. |
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| failure |
| Verify wiring between |
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| Replace valve if necessary |
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| Tank level sensor failure | Replace Sensor |
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| System valve(s) closed | operational and adjust. |
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| Verify that all system valves are |
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| No Flow | 15 | SC |
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| Low flow sensor failure | and at the terminal block. |
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| Verify the sensor at the sensor |
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| Pump failure | Verify the operation of the |
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| pump (i.e. motor circuit |
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| protector or pump rotation) |
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| CC = Compressor Critical | SC = System Critical | PC = Process Critical | W = Warning |
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| Alarm Name | # | Type | Possible Cause | Solution |
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| Motor circuit protector open | Verify motor circuit protector |
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| operation. Verify motor wiring |
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| Pump Overload | 16 | SC |
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| and amp draw while under load. |
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| Verify system valves are |
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| Pump flow rate in excess of | operational and properly set. |
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| Contact customer service or |
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| capacity |
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| sales if pump is sized too small |
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| for application. |
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| High Fluid Temp Fault | 17 | SC/W | Fluid temperature higher than | Verify parameter and adjust if |
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| parameter. | necessary. |
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| Refrigeration system fault | Check for any refrigeration |
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GP Series Portable Chillers | Chapter 6: Troubleshooting | 52 of 90 |
