Owner's Manual

POSSIBLE CAUSE SOLUTION
Door jammed or obstructed. Check manual operation of door.
Sprocket key missiing or drive chain
broken.
Check drive chain for operation.
Drive chain too lose; permits chain
to jump teeth on sprocket.
Adjust chain to proper tension. See Figure 7.
Limit nuts binding on screw, causing
them to jump position on retaining
bracket.
Check for free rotation on limit screw. Lubricate screw or replace nuts if
threads are defective.
Limit nut retaining bracket not
engaging notches in nuts.
Set nuts and be sure bracket is in notch on each nut. (See Figure 10.
Inoperative or improperly adjusted
brake (when equipped).
Adjust brake. See Figure 15.
Door tension incorrect. Disconnect operator and check operation of door.
Dead phase (on 3 phase). Check power supply.
Brake does not release. Check wires to brake solenoid, check adjustment.
*Door locked or jammed. Check door. Try manual operation.
Building fuse blown or circuit
breaker tripped.
Check power supply fuses, circuit breakers, disconnect switch, check
for cause.
Overload protector tripped. Reset and check for cause.
NOTE: To isolate cause, operate
contactor solenoid plunger
manually. If motor runs, cause is in
push button circuit.
Check pushbutton circuits for voltage angainst voltage indicated on
wiring diagram. Check push button wiring. Check interlock switch
wiring.
Interlock switch broken or
inoperative.
Check that hoist engagement yoke (hand chain) is making contact with
interlock switch located on side of the control box. Check wiring to
switch and switch function. Normally closed for operation electrically
and normally open for hand chain operation.
On three phase operators power
supply is connected out of phase.
Interchange connections of any two power supply leads. (See wiring
diagram)
Operator not installed correctly. Remount operator so that motor is “up” or toward door wall or contact
factory as to wiring changes required.
On three phase operators power
supply is connected out of phase.
Check phase as above.
Limit nuts not adjusted properly. See limit adjustments page 10.
Defective limit switch. Operator limit switfch manually while door is moving to determine if
switch is operative.
Single phase operator (without
instant reverse motor). Stuck push
button or short in control wiring.
If door overrides up limit, check down button and circuit. If door
overrides down limit, check open button and circuit.
Limit drive chain broken or
inoperative.
Replace chain, check limit screw for rotating.
SYMPTOM
Motor runs but door
does not move
Limit switches do not
hold setting
Door drifts when
operator shuts off.
Motor hums — does
not run.
Motor does not run
when open or close
wall button is pressed.
Operator closes door
when “open” button is
pressed, and limit
switches do not
function properly.
Operator fails to shut
off at fully open closed
position.
* Door must be in good operating condition.
An electrical door operator cannot move a garage door that is in poor condition. The door must operate freely in the track, with no binding or obstructions, and must
be well balanced. Check the spring balance of your door by bringing the door to a half-open position and leaving it there. If the door stays in that position, it is well
balanced. If it moves more than a few inches the springs possibly need adjustment. Call a qualified door service company.
TROUBLESHOOTING GUIDE
21