9. CHECK COOLING OPERATION
Notes:
•To avoid the minimum on and off times during system checkout, always start and end the check out procedure in the OFF mode.
•Do not operate air conditioning at low outdoor temperatures. Refer to equipment manufacturer recommendations for safe operating temperatures.
1. Set the thermostat to the OFF mode.
2.Set the thermostat to the COOL mode.
•With the O/B configuration setting in the O position (OFF), the O/B terminal will be on in the Cool mode. In the
B position (ON), the O/B terminal will not be on in the Cool mode.
3.Lower the temperature setting below the room temperature to activate the desired stages of cooling. The mode display will change from “COOL MODE” to “COOLING”, which will flash, when the thermostat is calling for cooling. Fifteen (15) seconds must elapse between each stage. Verify the correct outputs are on according to the configuration settings shown below:
TROUBLESHOOTING – COOLING OPERATION
Symptom | Cause | |
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Thermostat does not call for cooling | ||
to COOL and make a call for cooling. | ||
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Cooling does not come on at all | RC terminal not connected – see wiring diagrams. | |
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Cooling equipment power not on. | ||
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Heat comes on instead of cooling | O/B dip switch not set properly. See Step 2, page 32. | |
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Miswiring – check wire colors at thermostat and HVAC equipment. | ||
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| Single/Multi | Single |
| Multi |
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Configuration Settings | HP/HC |
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| The same outputs come on | ||
Elect/Gas |
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| regardless of how these are set. | |||
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| Aux. Ht. Stages |
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Outputs Energized | 1st Stage Cool | Y1, G |
| Y1, G |
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2nd Stage Cool |
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| Y1, Y2, G | |
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- 32 - | - 33 - |
