20
SYMPTOM PROBABLE CAUSE SUGGESTED ACTION
When door closes it
reverses to fully
open.
“advanced close” limit switch is not
sufficiently advanced. Reversing
edge is not disabled causing door
to reverse.
The "advanced close" limit switch needs to be adjusted
just slightly ahead of the end of travel "closed" limit
switch.
Radio-control does
not function or
hesitates for 10
seconds before
working.
It is normal for a radio receiver to
take up to 10 seconds to "warm-up"
before being fully operational.
Therefore, when applying power for
the first time, the radio-control will
take 10 seconds before becoming
fully operational.
Check protocol code pins of the transmitter and receiver:
they must be the same. Press on the transmitter and
listen to the receiver: you should hear a faint click. The
transmitter battery may be dead or your receiver may
need servicing. To test for radio-control function, short
out momentarily terminals 7 and 8 on the terminal strip.
Operator should function normally. Have the radio-
control verified: the mini-relay inside the receiver may be
defective.
Motor hums, starts
when spun.
Capacitor defective. Replace
Defective limit switch.
Operate limit switch manually while door is moving and
operate switch.
Limit cams are not adjusted. Verify and adjust.
Limit drive chain broken. Replace.
Loose sprocket on limit shaft. Tighten set screw.
Motor fails to shut
off at fully closed or
opened positions.
Limit screw does not rotate. Verify and replace accordingly.
Sprocket key is missing. Replace
Drive chain is broken. Replace
Motor turns but
door does not
move.
Clutch is slipping. Adjust clutch tension.
Motor hums or
does not run.
Door locked or jammed. Verify manual operation of door.
Limit cam retainer not engaging
slots in limit cams
Be sure retainer is in slots of BOTH cams.
Limit switches do
not hold their
setting.
Limit cams are binding on screw
threads which allows them to jump
position on retainer.
Lubricate screw threads. Limit cams should turn freely.
Radio-control
opens and reverses
the door, but when
the door is fully
opened, will close
the door a little and
bounce back to the
open position
again. Door cannot
be closed except by
the "close" push-
button.
The "advanced open" limit switch is
insufficiently advanced from the full
"open" limit switch. The contact of
the radio-control receiver is
maintained for 1.5 seconds when a
command is issued by the radio
transmitter. Therefore, when the
door is fully opened, and a pulse is
sent from the transmitter, the
receiver maintains the contact
closed for 1.5 seconds. If the door
has closed and the "advanced
open" limit switch has returned to
it's normal state, the reversing relay
will be activated, and the door
bounces back to the open position.
Adjust the "advanced open" limit switch.
Instructions applied only to Opera-MJ operators with a solenoid brake
Door locked or jammed. Verify manual operation of door.
Motor hums or
does not run.
Brake does not release.
Check wires to brake solenoid. Verify and adjust
brake tension.
Door opens fine but
when press close,
motor hums or
blow the main
breaker.
Brake sloneloid not releasing.
Check 24V relay activating the brake solenoid on
closing side.
Replace.
Door closes fine
but when press
open, motor hums
or blow the main
breaker.
Brake sloneloid not releasing.
Check 24V relay activating the brake solenoid on
opening side.
Replace
To Next Page
Loading...
