AC keeps tripping breaker
#1
03-13-02, 09:24 AM
AC keeps tripping breaker
My ac unit trips the breaker when I try to switch it on. Any suggestions as the problem?
#6
03-13-02, 12:42 PM
If the compressor motor doesn't start then it's a the "locked-rotor" mode and the current is 300-400% of the normal running current.Could you "isolate" the motor by dis-connecting the motor leads? If the problem is a defective starting capacitor then it's not an expensive repair. Good Luck!!
#7
03-13-02, 12:51 PM
If your breaker trips immediately when the unit is turned on (energized), then you have a direct short or ground smoewhere. The compressor would be a likely target. If the breaker has a delayed trip (5 or 10 seconds), them a fan motor or the compressor is drawing too many amps causing a hard start so to speak, heating up the breaker and tripping. If the unit runs for a short time and trips then chances are you've got some loose or burnt connections causing high amps which causes the breaker to trip. Check all wiring starting at the breaker. If all ok then your compressor is the most likely problem. When you find the problem,. get a new breaker.
#8
03-13-02, 02:38 PM
With the dis-connect OFF remove the grill that gives acess to where the line wires from the dis-connect switch connect to the contactor coil. Remove one of the line wires from the contactor terminal,insulate the exposed copper (tape or wire-nut),switch the dis-connect ON,and re-set the circuit-breaker.If the breaker remains ON then the fault in in the compressor section.Switch the dis-connect OFF.There are 3 leads to the compressor motor which is hermeticaly sealed. One will go to the starting capacitor. You can try re-placing the capacitor.You'll need to go to a HVAC supply-house-bring all the info. on the name-plate.
