Troubleshooting
7-2 P/N M/97-520
Table 7-2: Drive Motor
Problem Possible Cause Corrective Action
Motor noticeably
hot during operation
Normal operation None
Motor will not operate, or
must be assisted to operate
Damaged motor or gearbox
Damaged drive shaft bearings
or seal support seizure.
Process system pressure or
temperature setpoint has
been reached.
Damaged pressure or temper-
ature interlock.
Motor wired incorrectly.
1. Refer to Motor and
Gearbox Test in Section 6.
2. Refer to Drive Endcap
Service in Section 6 and
check the bearings.
3. Repair process system as
required.
4. Refer to Motor and
Gearbox Test in Section 6.
5. Refer to Motor Control
Enclosure Installation in
Section 2.
Motor runs in either direc-
tion depending upon
assistance
Damaged phase-shifting
capacitor in motor.
Refer to Capacitor Replace-
ment in Section 6 and replace
the capacitor.
Motor rotation does not
match torque response.
Torque sensor response not
properly calibrated.
Motor wiring incorrect.
Refer to Figure 3-1 in
Section 3.
Refer to Appendix B for
correct motor wiring informa-
tion.
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