Chamberlain K001D8395 - Symptoms and Solutions for Medium Duty Operators; Medium Duty Operator Unresponsive

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Medium Duty Logic Operators
Symptoms and Solutions
SYMPTOM: Operator Will Not Respond To Any Commands
POSSIBLE CAUSE: SOLUTION:
No power Verify primary line voltage (120 Vac, 60 Hz) is present at terminals L1 & L2. The LED will
fl ash when power is present.
Stop circuit not complete Verify Stop Button input (terminals 3 & 5) is properly wired and stop button is not stuck.
Stuck button on 3-button control
station
Verify that all buttons are actuating freely and releasing properly.
Interlock input activated a) Verify jumper is located at terminals 3 & 4 if interlock is not present.
b) Verify interlock is properly wired and not activated when present.
Motor overload tripped Overload is internal within motor. Allow to cool and retry.
Accessory failure a) Attempt to close by holding the CLOSE button for more than 5 seconds. If door closes,
check LiftMaster Monitored Entrapment Protection (LMEP) for proper wiring, polarity,
connections or damage.
b) Remove obstructions or realign photoelectric sensor.
Possible component failure Call Technical Support for assistance.
SYMPTOM: Operator Makes Noise But Door Does Not Move
POSSIBLE CAUSE: SOLUTION:
Clutch slipping Adjust clutch, see owner’s manual.
Brake not releasing (if present) Verify brake assembly operation and wiring.
Door operation problem Check door for proper operation.
SYMPTOM: Operator Moves In The Wrong Direction
POSSIBLE CAUSE: SOLUTION:
OPEN and CLOSE button wiring
connection reversed
Check 3-button control wiring.
SYMPTOM: Door Drifts After Operator Stops
POSSIBLE CAUSE: SOLUTION:
Door not balanced properly Check door for proper operation.
Clutch slipping Adjust clutch, see owner’s manual.
Brake not functioning properly (if
present)
Check brake mechanism to ensure brake lever is free and brake pads are engaging the
brake disc.
SYMPTOM: Door Opens/Closes Too Far
POSSIBLE CAUSE: SOLUTION:
Limits not adjusted properly Adjust limits. See owner’s manual.
SYMPTOM: Door Reverses Unexpectedly
POSSIBLE CAUSE: SOLUTION:
Intermittent Entrapment Protection
Device activation
Check all connections. Remove obstructions or realign photoelectric sensor.
SYMPTOM: TTC Not Functioning
POSSIBLE CAUSE: SOLUTION:
LiftMaster Monitored Entrapment
Protection Devices
Check all connections. Verify photoelectric sensors are not blocked and the sensing edge
(if installed) is not activated.
TTC temporarily disabled Close and Open the door. TTC will be re-enabled.
TTC not programmed properly Reprogram TTC. See see owner’s manual.
Radio Functionality NOTE: Built in radio receiver compatible with all LiftMaster 315 MHz remote control devices.
SYMPTOM: No Response
POSSIBLE CAUSE: SOLUTION:
Remote control is not programmed See owner’s manual for programming instructions.
Remote control not compatible Obtain compatible LiftMaster remote control.
Low battery Replace battery.
SYMPTOM: Remote Cannot Be Learned
POSSIBLE CAUSE: SOLUTION:
Low battery Replace battery.
Remote control not compatible Obtain compatible LiftMaster remote control.
SYMPTOM: Poor Radio Range
POSSIBLE CAUSE: SOLUTION:
Low battery in remote Replace battery.
Antenna not confi gured See owner’s manual.
Ambient radio interference or
building structural issue
Use EXTERNAL ANTENNA kit, (part: EXT-ANT, see owner’s manual).