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Old 08-28-2011, 08:42 AM   #1
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Carrier 5 Ton Condensor fan running Slow.


I have wierd issue. I lost the run / start cap recently. I could bump start the fan and it ran what appeared a little slowly. This unit has run for 9 years with no issues - since new. I checked the input voltage - 230. So I replaced the fan and the 50/5 MDF 440 dual cap checked the voltages on the eqipment side of the contactor and everything looked good. The compressor runs fine - the house cools - it seems to be drawing heat out of the unit. But the fan runs slower than any unit I have looked at. The motor is a GE 1100 RPM (new) Thoughts, What else can I do?

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Old 08-28-2011, 01:04 PM   #2
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Carrier 5 Ton Condensor fan running Slow.


Does the new motor have the same amp rating as the old motor?

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Old 08-28-2011, 10:48 PM   #3
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Carrier 5 Ton Condensor fan running Slow.


The motor is the same - OEM replacement. The specs are the same.
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Old 08-28-2011, 11:30 PM   #4
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Carrier 5 Ton Condensor fan running Slow.


Dtgibson,
Check the wires again. What are the wire colors of the new motor? Give me the diagram of the new motor and how you connect them.
If you are sure that the wires are right, then return that fan motor and get a new one. It can cool fine now, but you will have alot of problems later as it will not reject heat fast enough.
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Old 08-30-2011, 10:30 PM   #5
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Carrier 5 Ton Condensor fan running Slow.


Figured out the issue, the original parts supplier sold me the wrong motor. What they claimed was the right one turn out to be one for a much newer condenser unit. Put the right motor in - and it took off as expected. Thanks for all the suggestions. FYI Columbuselectricworks.com is awesome place to get your replacement motors..... They are very helpful and go the extra mile.. A+++++
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