LiftMaster MH Support Question
LiftMaster MH Support Question
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Question posted by kellhowarda on December 19th, 2012
Mh Liftmaster Garage Door Will Not Open Intermittently.
On the occasion when the garage door will not open, there is power to the opener. Both leds on the photoelectric sensors are lit and when I put my hand in front of them I hear a click at the main LiftMaster box. The opener will not open with either the remote or the 3 button hard wired opener. Need your suggestions please.
Current Answers
Answer #1: Posted by GarageDoorMafiadotcom on December 23rd, 2012 11:35 PM
GarageDoorMafiadotcom
Member since:
November 4th, 2012 Points: 25,600
Member since:
November 4th, 2012 Points: 25,600
The click you hear when you put your hand in-front of the safety sensor is the relay for the work light. With working light bulb install the light will come on.
That it don't open the door can be many things. First thing is to check the springs for the garage door and door balance OK. If broken spring or need spring adjustment, call the pro's.
GarageDoorMafia.com One stop online shop for all your garage door and opener needs.
Related LiftMaster MH Manual Pages
MGJ User's Guide Manual - Page 2
... radio receiver that can be enabled when LiftMaster Commercial Protector
operating up to 12 cycles per hour or 50 cycles per day.
Turn power OFF and ON to the operator.
Press and hold the LEARN and CLOSE buttons until the LED goes out (approximately 3 seconds). Electrical Box Logic Board
014A1030
J4 C32
TP1 C20...
MGJ User's Guide Manual - Page 4
...
AAUUX AANNTT J2
L5 ^^^^
R27
TTC 1
C18
D14
LEARN STOP CLOSE OPEN
LED
2
3
4
5
6
7
K2 LT
C29 R24 P1
D9
LMEP1 LMEP2 COM INTRLK STOP CLOSE OPEN
LEARN STOP CLOSE OPEN LEDD14
1
2
3
4
5
67
MEP1 LMEP2 COM INTRLK STOP CLOSE OPEN
NOTICE: To comply with door in fully closed position. 2. THERE ARE NO OTHER USER SERVICEABLE PARTS. TIMER...
MGJ User's Guide Manual - Page 5
... interlock will
Door
open door falling rapidly and/ or unexpectedly. • NEVER use emergency release handle to trolley. Chain Retaining Bracket (with pad locking provisions)
ADVERTENCIA PRECAUCIÓN
Electrical Interlock with a manual hoist.
Emergency
disconnect will disable the electrical controls when the hoist is CLOSED. Arm
Lift free end of emergency or power failure...
MGJ User's Guide Manual - Page 7
... Press CLOSE button. TEST REMOTE CONTROL * Requires B2 wiring type and compatible LiftMaster remote
control. Press remote control button. 4. WARNING
TESTING
WARNING
CAUTION Turn on power, LED will open .
Press CLOSE button. (The door should open . 3. Press OPEN button. (The door should move in the close . Door should close if photo eyes are working properly.
• Be sure...
MGJ User's Guide Manual - Page 8
... section. The operator should be serviced at www.liftmaster.com
CONDITION
POSSIBLE CAUSE
OPERATOR WILL NOT RESPOND TO ANY COMMANDS
No power
Accessory failure
Possible component failure
OPERATOR MAKES
Operator requires adjustment
NOISE BUT DOOR DOES
NOT MOVE
DOOR DRIFTS AFTER OPERATOR STOPS
Operator or door requires adjustment
DOOR OPENS/CLOSES Operator requires adjustment TOO FAR...
MJ5011E QuickStart-2008 Manual - Page 1
... local electrical codes.
11 Adjust the limit switches to open and close to door shaft and sprockets are positioned between the door shaft and operator drive shaft is disconnected by slipping the end through the power wiring conduit hole in the electrical box enclosure. Refer to Model MH instructions above . Refer to Model MJ instructions above...
MJ5011E QuickStart-2008 Manual - Page 2
... safe for the model MJ/MH/MHS door operator Medium Duty Logic
This QuickStart is intended to Close. Press and release the LEARN button
(LED will
add 5 seconds to the Timer to highlight a typical installation. A LiftMaster monitored safety device must be active.
Press and hold the button on the logic board
(OPEN, CLOSE or STOP).
A SAFETY...
MJ5011E Installation-2008 Manual - Page 4
... non-monitored safety devices including LiftMaster CPS photo-eyes and industry standard sensing edges. lbs/ sec. OUTPUT RPM:
MJ 80 RPM MH 80 RPM MHS 38.6 RPM LIMIT ADJUST Fully...door)
18.5" (1487.5c0m")
A
B 6(1.636.4.55"01 "cm)
B A
A
B 141.47.57"5" (37.47 cm)
B A
7" (17.78 cm) 10.88"1(02.78.86"4 cm)
151.57.87"8" (40.03 cm)
9.19" (293..1394"cm)
Hand Chain Wheel present with model MH...
MJ5011E Installation-2008 Manual - Page 5
... Label
1
Installation Hardware Box
1
Complete with manual hoist hand chain systems, the handing of the door jamb. AVERTISSEMENT
HAANDTINTGEIDNENTTIIFOICNATION
For MH and HMS models with : Master links (2),
wall bracket (1), Fastener Bag (1)
WARNING
PREPARATION
WARNING
PREPCARAINUG TYOIUORNDOOR
The manufacturer recommends 3' (91.4 cm) of clearance in the door opening, hook the chain...
MJ5011E Installation-2008 Manual - Page 9
... the operator controls. Operator
Operator
8 INSTALL MANUAL DISCONNECT SYSTEMS
The MHS operator includes both a floor level disconnect chain to disconnect the door from the door operator and a disconnect chain with pad locking provisions)
B Wrap hand chain around hand chain wheel and through chain guide
(MH AND MHS ONLY)
4' above floor
A Secure keyhole bracket to mounting surface using...
MJ5011E Installation-2008 Manual - Page 19
....
TO PROGRAM 1.
TO ERASE ALL REMOTE CONTROLS
Press and hold the LEARN button (over 5 seconds) until the
LED flashes rapidly, then release to complete programming (LED will become enabled after the next open cycle. Electrical Box
Logic Board
014A1030
J4 C32
TP1 C20
R25
C9
C21
U1
D7
D5
U4 D6
D4
C31
AAUUX...
MJ5011E Installation-2008 Manual - Page 20
...ADVERTENCIA
20 WARNING
TESTING
WARNING
CAUTION Turn on power, LED will open the door only. 1. Press remote control button. 4. The door should close .) 4. Remove the obstruction. ... LiftMaster remote
control. AVERTISSEMENT If door did not reverse from electrocution, disconnect ALL electric power BEFORE performing ANY maintenance. Allow the door to the operator on power up...
MJ5011E Installation-2008 Manual - Page 21
...Weak or broken springs or unbalanced door could result in an open door falling rapidly and/or unexpectedly. • NEVER use emergency disconnect ONLY when door is used , pull handle to... case of emergency or power failure.
MODEL MH
These operators are equipped with Hoist for Models MH and MHS
Keyhole Bracket
ADVERTENCIA PRECAUCIÓN
Manual Disconnect for your door. • If possible...
MJ5011E Installation-2008 Manual - Page 22
... is properly wired and not activated. The LED will be re-enabled.
E) Motor overload tripped
➤ Overload is not programmed
➤ See PROGRAMMING REMOTE CONTROLS section.
DOOR REVERSES UNEXPECTEDLY
Intermittent Safety Device activation
➤ Check all LiftMaster 315MHz remote control devices. TTC will flash when power is present.
A) Low battery
➤ Replace battery...
MJ5011E Installation-2008 Manual - Page 31
...
7 Conductor 20 AWG Wire (500'): Recommended for TO
MJ, MH, and MHS.RING
10-9095
ANTENNA EXT-ANT
OPEN
Medium Duty Angle Mounting Bracket:
CLOSE
Heavy-gauge steel bracket.
May... composite housing. (Wireless controls can be welded. ENTRAPMENT PROTECTION DEVICES OPEN
CPS-LN4
OPEN
Commercial ProtectorCLOSSE ystem:
Provides protection on doors up to 30' wide. PRESS TO
R ING
86LM (15')...
MJ (BLACK LINE) Manual - Page 2
... chain/sprocket. HAND CHAIN WHEEL: .........Left or right handing Models MH and HMJ only.
WEIGHTS AND DIMENSIONS
HANGING WEIGHT: .........80-110 LBS. 12.69"
6.34" 6.34"
6.13"
3.63" 2.91"
MOUNTING DIMENSIONS A - OPEN/CLOSE/STOP
WIRING TYPE C2 (Standard) Momentary contact to OPEN & STOP, constant pressure to CLOSE, open override plus wiring for emergency manual door operation. See...
MJ (BLACK LINE) Manual - Page 3
... INJURY or DEATH:
• DO NOT connect electric power until instructed to do so.
• If the door lock needs to remain functional, install an interlock switch.
• ALWAYS call a trained professional door serviceman if door binds, sticks or is out of door, and in the door opening, hook the chain off to the side near the...
MJ (BLACK LINE) Manual - Page 5
... both openings in case of the continuous loop hoist chain (large chain). Remove excess links if necessary. Model MH
These operators are equipped with pad locking provisions)
3. Pull the disconnect chain (small chain) to electrically disable the operator controls.
1.
Electrical Interlock with Hoist for manually operating the door in the chain guide. Install Hand...
MJ (BLACK LINE) Manual - Page 6
....
COIL CORD: Connect operator end of coil cord to junction box (not supplied) fastened to the wiring diagram supplied with your operator.
To increase door travel , spin limit nut toward actuator.
3.
If not pre-installed by either coiled cord or take-up the door opening .
4. Important Notes:
a. WIRING: For wiring of your sensing device...
MJ (BLACK LINE) Manual - Page 9
... or door. Reinstall cotterpin. WARNING
To prevent possible SERIOUS INJURY or DEATH, install
CAUTION reversing sensors when ... so that the door will then open a fully closed door, close a fully open door, and reverse a closing door from the control... mounted to stop the door by hand during travel . CAUTIWONARNING gate or garage door:
• ALWAYS keep gate or garage door in parallel with type ...
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