Having A Problem? (Troubleshooting) - Chamberlain Security+ 3950 Owner's Manual

HAVING A PROBLEM?
(TROUBLESHOOTING)
1. The operator doesn't operate from either the door control or
the remote control:
• Does the operator have electric power? Plug a lamp into the
outlet. If it doesn't light, check the fuse box or the circuit
breaker. (Some outlets are controlled by a wall switch.)
• Is there a build-up of ice or snow under the door? The door
may be frozen to the ground. Remove any restriction.
• The door spring may be broken. Have it replaced (see page 3
for reference).
2. Operator operates from the remote, but not from the single
button control station:
• Are the wiring connections correct? Review Installation
Step 4.
3. The door operates from the single button control station,
but not from the remote control:
• Program the operator to match the remote control code.
(Refer to instructions on the motor unit panel.) Repeat with
all remotes.
4. The remote control has short range:
• Check to be sure the antenna on the side or back panel of
operator extends fully downward.
• Some installations may have shorter range due to a metal
door, foil backed insulation, or metal siding.
5. The door opens and closes by itself:
• Be sure that all remote control push buttons are off.
• Remove the bell wire from the door control terminals and
operate from the remote only. If this solves the problem, the
single button control station is faulty (replace), or there is an
intermittent short on the wire between the control console
and the motor unit.
• Clear memory and re-program all remote controls.
6. The door doesn't open completely:
• Is something obstructing the door? Is it out of balance, or
are the springs broken? Remove the obstruction or repair
the door.
7. The door opens but won't close:
• Check the safety reversing sensor. See Installation Step 6.
• See Adjustment Step 2. For an existing installation,
see below.
Repeat the safety reverse test after the adjustment is complete.
8. The door reverses for no apparent reason:
• Is something obstructing the door? Pull the emergency
release handle. Operate the door manually. If it is
unbalanced or binding, call a trained door systems
technician.
• Clear any ice or snow from the floor area where the door
closes.
• Review Adjustment Step 2.
Repeat safety reverse test after adjustments.
9. The door reverses for no apparent reason:
• Check the safety reversing sensor. Remove any obstruction
or align the receiving eye. See Installation Step 6.
10. The operator strains to operate door:
• The door may be out of balance or the springs may be
broken. Close the door and use the emergency release
handle to disconnect the door. Open and close the door
manually. A properly balanced door will stay in any point of
travel while being supported entirely by its springs. If it
does not, disconnect the operator and call a trained door
systems technician.
11. The operator motor hums briefly, then won't work:
• The door springs may be broken. See above.
12. The operator won't operate due to power failure:
• Use the emergency release handle to disconnect the door.
The door can be opened and closed manually. When power
is restored, pull manual release a second time.
• If a standby power unit is connected, the operator should
be able to operate up to 20 times without power.
13. Door loses limits:
• Reprogram limits see Adjustment Step 1.
14. The operator moves when the door is in operation:
• Minor movement for this operator is normal as long as it is
not excessive.
• Check all mounting hardware to the operator and/or
operator mounting brackets. Verify the operator is
mounted at a right angle to the door shaft, sprocket and
chain are aligned.
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