Section 7 – Maintenance
48
Component
What to look for and how often the
components must be inspected:
Weekly
Monthly
Quarterly
What to do if problem exists:
Motor Operator
Are the fasteners attaching the motor-
to-the mounting bracket secure?
X
Fasteners must be inspected/replaced and
properly tightened. Contact Service for
replacement hardware.
Is the door stopping correctly at the
open and closed (as soon as the
bottom bar contacts the floor)
positions?
X
Limits may have to be adjusted in the motor
operator. Refer to the operator owner’s
manual or contact Service.
Is the operator functioning normally?
X
Refer to the
Operator Troubleshooting
Table
on the following page to diagnose the
problem.
4. Operator Troubleshooting:
Note
: If you suspect you are having an issue with your operator, use the following table to determine the
potential causes. If the provided solution does not eliminate the issue, or the table does not address your
particular problem, contact the Service Department.
Component
Problem
Potential Cause
Solution
Motor Operator
Motor Operator does not run
when OPEN or CLOSE button
is pushed
The circuit breaker may be flipped or
fuse blown.
Reset breaker or replace fuse. Contact
Service if replacement fuse is needed.
The thermal overload may be tripped.
Reset thermal overload.
Motor operator runs but the
door does not move
Tube motor internal gearing might be
damaged.
Contact Service for repair parts. Hoods
and shaft will need to be removed to
replace tube motor.
Motor hums but does not run
Door or drive chain may be jamming.
Check for hang-ups or obstructions. Try
to operate manually. If issue persists,
contact Service.
Brake does not release.
Check power to brake solenoid.
Open motor winding.
Check that all connections are secure.
Motor operator runs in wrong
direction and limits do not
function
Polarity is reversed.
Interchange any 2 power leads to unit.
Door drifts when motor shuts
off
Brake may be improperly adjusted or
broken.
Contact Service for repair parts. Hoods
and shaft will need to be removed to
replace tube motor (brake is internal).
Motor operator does not shut
off at full OPEN or at full
CLOSE position
Limits may need adjustment.
Refer to the operator owner’s manual to
readjust limits.
Limit switch may be defective.
Contact Service.
Limit nut retainer not engaging slots in
limit nuts.
Be sure retainer is securely engaged in
slots of both limit nuts.
Limit nuts binding on screw threads,
allowing them to jump position on
retainer.
Lube screw thread. Check that limit
nuts turn freely.
