Troubleshooting
Table 31. Compressor output does not energize
Probable cause | Explanation |
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Random restart timer | All controller outputs remain off until the timer expires. |
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Selected mode OFF | When off is selected at the display to the controller, the unit controls all outputs off. |
Selected mode FAN ONLY When fan only is selected at the display to the controller, the unit only allows the indoor fan to energiz.
Diagnostic present | A specific list of diagnostics affects compressor operation. For more information, see the Diagnostics section in the |
| manual. |
|
|
No power to the | If the controller does not have power, the compressor does not operate. For the controller to operate normally, it |
controller | must have an input voltage of 115 or 230/208, 265 VAC. |
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|
Manual output test | The controller includes a manual output test sequence you can use to verify output operation and associated |
| output wiring. However, based on the current step in the test sequence, the compressor may not be on. Refer to |
| the Manual Output Test section. |
|
|
Unit wiring | The wiring between the controller output and the compressor must be present and correct for normal operation. |
|
|
Indoor Coil Freeze | The compressor has been turned off because the indoor coil temperature has fallen below 35°F and has not risen |
protection | above 50°F |
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|
Table 32. Indoor/remote fan outputs do not energize
Probable cause | Explanation |
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|
Random restart timer | All controller outputs remain off until the timer expires. |
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|
Normal operation | Depending on the configuration selected the fan(s) may be only cycle with the compressor output |
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|
Selected mode OFF | When off is selected at the display to the controller, the unit controls all outputs off. |
|
|
Diagnostic present | A specific list of diagnostics affects fan operation. For more information, see the Diagnostics section in the manual. |
|
|
No power to the | If the controller does not have power, the compressor does not operate. For the controller to operate normally, it |
controller | must have an input voltage of 230/208, 265 VAC. |
|
|
Manual output test | The controller includes a manual output test sequence you can use to verify output operation and associated output |
| wiring. However, based on the current step in the test sequence, the fan(s) may not be on. Refer to the Manual |
| Output Test section. |
|
|
Unit wiring | The wiring between the controller outputs and the fan relays and contacts must be present and correct for normal |
| fan operation. |
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|
Table 33. Outdoor fan output does not energize
Probable cause | Explanation |
|
|
Random restart timer | All controller outputs remain off until the timer expires. |
|
|
Selected mode OFF | When off is selected at the display to the controller, the unit controls all outputs off. |
Selected mode FAN ONLY When fan only is selected at the display to the controller, the unit only allows the indoor fan to energize.
Diagnostic present | A specific list of diagnostics affects compressor and therefore the outdoor fan operation. For more information, see |
| the Diagnostics section in the manual. |
|
|
No power to controller | If the controller does not have power, the compressor does not operate. For the controller to operate normally, it |
| must have an input voltage of 115 or 230/208, 265 VAC. |
|
|
Manual output test | The controller includes a manual output test sequence you can use to verify output operation and associated output |
| wiring. However, based on the current step in the test sequence, the outdoor fan may not be on. Refer to the |
| Manual Output Test section. |
|
|
Unit wiring | The wiring between the controller output and the outdoor fan must be present and correct for normal operation. |
|
|
Coil Burst Protection | The outdoor fan has been turned off because the indoor coil temperature has risen above 140°F and has not fallen |
| below 125°F |
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Normal operation | The outdoor fan cycles with the compressor output |
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|
Defrost Cycle | During the active defrost cycle the outdoor fan is controlled off. See the section on defrost control. |
|
|
Unit wiring | The wiring between the controller outputs and the fan relays and contacts must be present and correct for normal |
| fan operation. |
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