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Troubleshooting (continued)
Display
Code
Message
F02
F02 OPEN
LIMIT
F04
F04
UNAUTH.
STOP
(continued)
Description
Door has moved
beyond the upper end
position
No motor motion
was detected when
the operator was
attempting to move the
motor.
Possible Causes Diagnosis
Operator has been
Check position of
manually hoisted
door/operator with
above the upper
manual hoist
position limit
(hoisted jackshaft
models only)
Door is drifting
Check for excessive
upward when
door imbalance in up
operator is
direction
stopped
Door encountered
Check doorway
obstruction or
for obstruction.
other mechanical
Check to ensure the
jam
mechanical system
moves properly and
without hangups or
excessive resistance.
Motor cable is
Check that motor
disconnected or
cable is plugged into
wiring fault
the powerhead main
board completely.
Ensure that motor
cable is intact and in
good condition.
66
Resolution
Move position back
within normal limits.
Adjust door position
limits if necessary.
Rebalance door
Ensure correct springs
and drums are used
Remove obstruction
Ensure motor connector
is fully seated.
Repair any problems
with the cabling.
If cabling is beyond
repair, replace motor.
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