Chamberlain K001A5729, Manual

Page: 37 / 65

37
C
Mechanical Operators
Symptoms And Solutions
SYMPTOM: Motor Is Running But The Door Will Not Move
POSSIBLE CAUSE: SOLUTION:
The door is obstructed or locked Check the door
The clutch may need adjustment Adjust the clutch.
SYMPTOM: Operator Continues To Run At End Of Door Travel
POSSIBLE CAUSE: SOLUTION:
Limits are not set correctly Adjust limits.
Limit switch is faulty Test the switch and check the switch wiring.
SYMPTOM: Motor Operates In Only One Direction When Operated From Radio
POSSIBLE CAUSE: SOLUTION:
Auxiliary device limit switch is not being
activated properly Verify the Auxiliary and Sensing Limit Switches (SLS) are activated
in full open and close positions (respectively). Reposition, rewire or
replace.
SYMPTOM: Timer To Close Function Is Inoperable
POSSIBLE CAUSE: SOLUTION:
Timer to close control station is defective Test continuity through wire, then repair or replace.
Timer impulse or timer latch relays are
defective Repair or replace.
Timer defeat switch may be activated or
miswired Verify it is “normally closed” and wired correctly; replace if needed.
Defective timer If timer latch and timer impulse relays activate and timer does not
time out, replace timer.
SYMPTOM: Auxiliary Device(s) Will Not Cause Operator To Function Properly
(Radio Control, Sensing Edge, Interlocks, Etc.)
POSSIBLE CAUSE: SOLUTION:
Incorrect control function settings Check positions of control wiring for desired wiring type and reset
if necessary.
Incorrect electrical wiring connections Check wiring with diagram; rewire if necessary.
Auxiliary device uses too many watts If the device is suspect of using too much power, add an additional
transformer to power this device.
Auxiliary device limit switch or sensing limit
switch is not responding or may be over-
running sensing limit switch Test switches and the timing of the switches.