Troubleshooting
DETECTING HVAC SYSTEM PROBLEMS | ||
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Symptom | Possible Solution | |
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| Pressure switch open. | |
| Consult condensing unit manual for possible cause. | |
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| Compressor is off due to internal overload protector. | |
Condensing unit receiving signal but will not turn on. | Consult condensing unit manual for possible cause. | |
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Condenser control board anti short cycle timer is not | ||
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| yet expired. Most anti short cycle timers are 5 minutes | |
| or less, if the unit does not start after 5 minutes consult | |
| the condensing unit manual for possible causes. | |
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| A high static condition exists. Move the sensor | |
| further down stream to sense air that has mixed more | |
| thoroughly. Be sure not to place the senor past | |
Furnace tripped the primary limit, but the | the take offs. High static pressure must be corrected. | |
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zone panel does not indicate that the discharge | Bypass tap is too close to inlet of air handler. | |
air limit has been exceeded. | ||
Adjust bypass tap in the return air duct so that is further | ||
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| away from the furnace. This will give the air more of a | |
| chance to be tempered with room return air before | |
| entering the air handler again. | |
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| Limit on furnace open. Check position of DAS in | |
| the plenum and move further down stream if possible. | |
| High static condition must be corrected. | |
Air handler receiving signal but will not turn on. |
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DAS limit jumper needs to be moved to a lower setting. | ||
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| Trouble shoot air handler – see air handler | |
| documentation. | |
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