Graphic Panel
(See Figure 8 on Page 32.)
Indicator | Name | Description |
|
|
|
| Compressor On | The Compressor On light turns on whenever the |
| Light | compressor is operating. |
|
|
|
| Low Temperature | The Low Temperature light comes on if the process |
| Light | water/glycol temperature drops below the High/Low |
|
| thermostat set point. The High/Low thermostat stage |
|
| one switch opens the control circuit shutting down |
|
| the compressor, but the process water/glycol |
|
| pump(s) continue to operate. This action prevents |
|
| possible chiller evaporator |
|
|
|
| Hot Gas Bypass | The Hot Gas |
| Light | gas bypass valve is in operation. The OUT1 LED on |
|
| the controller also lights when the hot gas bypass |
|
| valve is in operation. |
|
|
|
| High Temperature | The High Temperature light comes on if the process |
| Light | water/glycol temperature rises above the High/Low |
|
| thermostat stage two set point. The High/Low |
|
| thermostat stage two switch opens the control circuit |
|
| shutting down the process water/glycol pump(s), |
|
| and the chiller shuts off. This action prevents |
|
| possible system failure from overheating of the |
|
| process water/glycol. |
|
|
|
| Pump On Light | The Pump On light, installed on chillers with a |
|
| pump, lights whenever the pump(s) operates. |
|
|
|
| High Discharge | The High Discharge Temperature light comes on if |
| Temperature Light | the compressor discharge line temperature switch |
|
| opens. This switch prevents possible compressor |
|
| failure due to over loading, the compressor stops, |
|
| but the pump(s) continue to run. This occurs when |
|
| the discharge line temperature rises above 260ºF |
|
| (127ºC). Call a qualified refrigeration service |
|
| technician or contact the Service Department. |
|
|
|
| Pump Overload | The Pump Overload light, installed on chillers with |
| Light | a pump(s), lights whenever a pump motor(s) has |
|
| shut down from a motor overload condition. |
|
|
|
| High Refrigerant | The High Refrigerant Pressure light comes on if the |
| Pressure Light | compressor discharge pressure exceeds the limit of |
|
| the high pressure cutout switch. The compressor |
|
| stops but the pump(s) continue to run until you |
|
| manually reset the |
|
| a qualified refrigeration service technician or |
|
| contact the Service Department. |
|
|
|
Chapter 4: Operation | 32 of 78 |