Troubleshooting - Chamberlain MHS Installation Manual

CONDITION POSSIBLE CAUSE
OPERATOR WILL NOT A) No power
RESPOND TO ANY
COMMANDS
B) Stop circuit not complete
C) Stuck button on 3-button
control station
D) Interlock input activated
E) Motor overload tripped
F) Accessory failure
G) Possible component failure
OPERATOR MAKES
A) Clutch slipping
NOISE BUT DOOR DOES
NOT MOVE
B) Brake not releasing (if present)
C) Door operation problem
OPERATOR MOVES IN
OPEN and CLOSE button wiring
THE WRONG DIRECTION connection reversed
DOOR DRIFTS AFTER A) Door not balanced properly
OPERATOR STOPS
B) Clutch slipping
C) Brake not functioning properly
DOOR OPENS/CLOSES Limits not adjusted properly
TOO FAR
DOOR REVERSES
Intermittent Safety Device
UNEXPECTEDLY
activation
TTC NOT FUNCTIONING A) Monitored Safety Devices
B) TTC temporarily disabled
C) TTC not programmed properly
RADIO FUNCTIONALITY NOTE: Built in radio receiver compatible with all LiftMaster 315MHz remote control devices.
NO RESPONSE A) Remote control is not
programmed
B) Remote control not compatible
C) Low battery
REMOTE CANNOT BE
A) Low battery
LEARNED
B) Remote control not compatible
POOR RADIO RANGE
A) Low battery in remote
B) Antenna not configured
C) Ambient radio interference or
building structural issue
T R O U B L E S H O O T I N G
Technical Support 1-800-528-2806
FIX
➤ Verify primary line voltage (120Vac,60Hz) is present at terminals L1 & L2. The
LED will flash when power is present.
➤ Verify Stop Button input (terminals 3 & 5) is properly wired and stop button is
not stuck.
➤ Verify that all buttons are actuating freely and releasing properly.
➤ Verify jumper is located at terminals 3 & 4 if interlock is not present.
➤ Verify interlock is properly wired and not activated.
➤ Overload is internal within motor. Allow to cool and retry.
➤ Attempt to close by holding the CLOSE button for more than 5 seconds. If
door closes, check accessory for proper wiring, polarity, connections or
damage.
➤ Verify safety eyes are aligned or safety edge is not activated.
➤ Call Technical Support for assistance.
➤ Adjust clutch, see ADJUSTMENT section.
➤ Verify brake assembly operation and wiring.
➤ Disconnect trolley and check door for proper operation.
➤ Check 3-button control wiring.
➤ Disconnect trolley assembly and check door for proper operation.
➤ Adjust clutch, see ADJUSTMENT section.
➤ Check brake mechanism to ensure brake lever is free and brake pads are
engaging the brake disc.
➤ Adjust limits. See ADJUSTMENT section.
➤ Check all connections.
➤ Check all connections. Verify Photo eyes are not blocked and the sensing edge
is not activated.
➤ Close and Open the door. TTC will be re-enabled.
➤ Reprogram TTC. See PROGRAMMING TTC section.
➤ See PROGRAMMING REMOTE CONTROLS section.
➤ Obtain qualified LiftMaster remote control device.
➤ Replace battery.
➤ Replace battery.
➤ Obtain qualified LiftMaster remote control device.
➤ Replace battery.
➤ See SETUP RADIO ANTENNA.
➤ Use EXTERNAL ANTENNA kit (see ACCESSORIES page).
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