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TABLE 3 TROUBLE-SHOOTING GUIDE
SYMPTOM PROBABLE CAUSE SUGGESTED ACTION
Machine is in disconnect position
(Opera–MJ).
Make free the disconnect chain from opera –MJ chain
keeper.
Chain hoist is engaged which
activated the disconnect switch
(Opera-MH)
Pull on chain slightly in each direction in order to
disengage the chain hoist and return the operator to
electrical operation. Check switch otherwise
Motor has overheated and the
internal thermostat has tripped.
Allow the operator to cool for 20 minutes before using it
again. Is the door unbalanced? Has the door been
operated more than 16 cycles/hour?
Circuit breaker tripped (if used). Reset circuit breaker.
Fuse is blown.
Replace fuse. If control circuit fuse keeps blowing:
Disconnect all external devices. Leave power terminals
connected. (Remove power to power terminals). Run the
operator artificially by using jumpers and shorting out the
appropriate terminals as indicated in the trouble-shooting
technique. Then reconnect the various external devices
one by one until you find the one causing the short to
ground.
OR: If you have an ohm-meter, use it to check all
incoming wires for continuity to ground. The meter
should read infinity in all instances. If there is conduction
between any control circuit wire and ground, this
indicates a leak to ground and this is why the control
circuit fuse blows when power is applied.
In some cases, the trouble is intermittent: i.e. the fuse
only blows at certain times. This problem is more difficult
to detect, but again: disconnect all wires going to
external devices, and run the operator: if the fuse does
not blow, this indicates that the trouble resides outside
the operator.
Transformer defective. Replace.
Defective "stop" push-button. Replace.
Loose connection in one of the
push-buttons.
Verify, tighten or replace
Defective "open" or "close" push-
button.
Replace.
Door will not respond
to "open" or "close"
push-buttons.
Disconnect lever is "disengaged"
position.
Pull lever to "engaged" position.
Defective "open" push-button Replace
Defective “open” limit switch. Replace
Door will not respond
to "open" command,
but will respond to
"close" command.
Loose wire on "open" push-
button, "open" limit switch or coil
of open relay.
Verify, tighten or replace.
Defective "close" push-button. Replace.
Defective “close” limit switch Adjust
Door will not respond
to "close" command,
but will respond to
"open" command.
Loose wire on close push-button,
close limit switch or coil of close
relay.
Verify, tighten or replace.
"close" relay is defective. Verify and replace.
Door closes by itself
and operator does
not shut-off at the
end of closing travel.
“close” limit switch defective Verify and replace.
Door opens by itself
and operator does
not shut-off at the
end of opening travel.
"open" relay is defective. Verify and replace.
Sensing edge does
not reverse door.
Pneumatic hose broken,
electrical wiring not connected.
Contact a qualified installer.
Reversing devices
connected between
terminals 3 and 6 will
reverse the door, but
will also open it
instead of being de-
activated when the
door is closed.
When the door is almost fully
closed, the "advanced close" limit
switch must be activated: this
disables the reversing devices
from further acting on the
reversing relay.
The "advanced closed" limit switch needs to be adjusted
just slightly ahead of the end of travel "closed" limit
switch.
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