Bell & Gossett P2002290A Series e-90 ECM Motor IOM - Manual (Page 12)

Check 2: Electrical Troubleshooting
1. Disconnect or remove power to the equipment being serviced and allow four (4)
minutes for the capacitors to discharge any residual voltage.
2. Check the rotation and speed of the motor. Determine if the motor can spin
IUHHO\E\KDQGZLWKRXWHIIRUWRUDVVLVWHGPHDQV,IDQ\ELQGLQJRFFXUVUHSODFH
the motor and control unit.
3. 'HWHUPLQHZKHWKHUWKHV\VWHPLVZLUHGIRU9$&SRZHURU9$&
SRZHU
4. Disconnect the power cord from the connector on the control unit. Inspect
th eSRZHUFRUGIRUEHQWGDPDJHGRUUHFHVVHGZLUHVDQGWHUPLQDOV>)LJXUH1@
Figure 1
10
Disconnect or remove AC power to the equipment being serviced and allow four
(4) minutes for the capacitors to discharge any residual voltage.
5.
Proceed to Check 3. 6.