carrier Supra 850 MT Please help

[muller1]

I am trying to get an electrical diagram for the unit on one of our trucks.
The electric motor is free but will not run and keeps tripping the breaker.
Any help appreciated.

Thanks.

mike

[djbe]

Why do you need an electrical diagram for that?

Just meter the motor out to check it is OK?

[cadwaladr]

I am trying to get an electrical diagram for the unit on one of our trucks.
The electric motor is free but will not run and keeps tripping the breaker.
Any help appreciated.

Thanks.

mike

have you or an electrician checked the resistance of the motor,is the breaker strong enough ie the correct amperage,has the unit ran on this supply in the past.

[stormycgc]

have u checked the over load setting in the control box ? also is it tripping out due to the engine clutch trying to crank at same time due to a seized on clutch ?

[transcoolchris]

Have you got 3 phases to motor? If not is the contactor and overload OK? I have had a few problems with Carrier contactors. Have you megger tested motor? If it all checks out Ok from memory I think there is a motor klixon in the circuit I have had problems with before.

[djbe]

Have you got 3 phases to motor? If not is the contactor and overload OK? I have had a few problems with Carrier contactors. Have you megger tested motor? If it all checks out Ok from memory I think there is a motor klixon in the circuit I have had problems with before.

No motor klixon in the circuit as far as I am aware?