Lift-Master MODEL T MAINTENANCE GUIDE
OWNER'S MANUAL
LOGIC CONTROL
L
C2 Wiring
F A C T O R Y S E T
See pages 15 and 16
for other wiring
configurations
LISTED DOOR OPERATOR
41B6
MODEL T
LOGIC CONTROL (VER. 2.0)
INDUSTRIAL DUTY DOOR OPERATOR
PATENT PENDING
The Maintenance Alert System
allows the installer to set an internal
Maintenance Cycle Counter. An LED
on the 3-button station will signal when
the set number of cycles is reached or
when the opener requires immediate
service.
TM
YEAR WARRANTY
2
Serial #
(located on electrical box cover)
Installation Date
Wiring Type
NOT FOR RESIDENTIAL USE
TABLE OF CONTENTS
SPECIFICATIONS
Packing List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Motor Specification . . . . . . . . . . . . . . . . . . . . . . . . .3
Electrical Specifications . . . . . . . . . . . . . . . . . . . . .3
Mechanical Specifications . . . . . . . . . . . . . . . . . . . .3
Safety Specifications . . . . . . . . . . . . . . . . . . . . . . .3
Weights & Dimensions . . . . . . . . . . . . . . . . . . . . . .3
PREP
ARATION
Track Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Powerhead Attachment . . . . . . . . . . . . . . . . . . . . . . . .4
Trolley Carriage/ Chain Attachment . . . . . . . . . . . . . . .4
INST
ALLATION INSTRUCTIONS
Mounting Header Bracket . . . . . . . . . . . . . . . . . . . . . .5
Mounting Operator . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Operator Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Straight Arm Attachment . . . . . . . . . . . . . . . . . . . . . . . .6
ENTRAPMENT PROTECTION
ACCESSORIES
Sensing Edges & Photo Eyes . . . . . . . . . . . . . . . . . . .7
LIMIT SWITCH
ADJUSTMENT
Limit Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
POWER & CONTROL
WIRING
Safety Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Power Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Ground Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Control Station Wiring . . . . . . . . . . . . . . . . . . . . . . .9
Radio Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Mounting Instructions . . . . . . . . . . . . . . . . . . . . . . .9
Optional Control Mounting . . . . . . . . . . . . . . . . . . .9
Optional Control Wiring . . . . . . . . . . . . . . . . . . . . .28
EMERGENCY DISCONNECT SYSTEM
Disconnecting . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Connecting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
BRAKE
ADJUSTMENT
Brake Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
CLUTCH
ADJUSTMENT
Clutch Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Clutch Adjustment . . . . . . . . . . . . . . . . . . . . . . . . .11
WIRING DIAGRAMS
1 PH Control Connections . . . . . . . . . . . . . . . . . . .12
3 PH Control Connections . . . . . . . . . . . . . . . . . . .12
1 PH Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
3 PH Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
ST
ANDARD PROGRAMMING
Wiring Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15 & 16
Self Monitoring Safety Devices . . . . . . . . . . . . . . . .16
RPM Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
Maximum Run Timer . . . . . . . . . . . . . . . . . . . . . . .17
Maintenance Alert System . . . . . . . . . . . . . . . . . . .18
OPTIONAL
PROGRAMMING
Mid Stop . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
Timer to Close . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
Red Green Warning Lights . . . . . . . . . . . . . . . . . . .19
Board Illustration . . . . . . . . . . . . . . . . . . . . . . . . . .20
REPLACEMENT P
ARTS & MAINTENANCE
Trouble Shooting Guide . . . . . . . . . . . . . . . . . . . . .21 & 22
Maintenance Schedule . . . . . . . . . . . . . . . . . . . . . .23
Customer Service Contact Information . . . . . . . . . .23
Electrical Box parts . . . . . . . . . . . . . . . . . . . . . . . . .24 & 25
Chassis Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26 & 27
PACKING LIST
PART #
01-17278
02-103L
10-10203
10-10204
10-10205
11-10130
11-10197
19-41ML
40-15259
40-55
75-10174
QTY.
1
1
1
1
1
1
1
2
1
2
1
DESCRIPTION
OWNERS MANUAL
3 BUTTON STATION
DOOR CURVED ARM
DOOR BRACKET
TRACK END BRACKET
PIVOT SHAFT
TAKE-UP BOLT
MASTER LINK, #41
LABEL, MAINTENANCE ALERT
LABEL, TROLLEY CAUTION
FRONT IDLER ASSEMBLY
PART #
75-10214
75-10259
75-17942
82-HN38-12
82-HN38-16
82-RN31-26
84-FN-31
84-FN-38
84-LH-38
85-LS-38
86-CP045-108
QTY.
1
2
1
10
3
2
2
12
1
3
2
DESCRIPTION
DOOR ARM ASSEMBLY
TRACK SPACER ASSEMBLY
TROLLEY SLIDER
HEX BOLT, 3/8-16 X 3/4" LONG
HEX BOLT, 3/8-16 X 1" LONG
CARRIAGE BOLT, 5/16-18 X 2-1/2"
FLANGE NUT, 5/16-18
FLANGE NUT, 3/8-16
LOCKNUT, 3/8-16
LOCKWASHER, 3/8"
COTTERPIN, 9/64 X 1-1/2" LONG
HARDWARE KIT (K77-13821)
Before beginning your installation check that all components were supplied and received undamaged.
Before attempting to install, operate or maintain the operator, you must read and fully understand this manual and follow all safety instructions.
These instructions are intended to highlight certain safety related issues. These instructions are not intended to be comprehensive. Because each application is unique, it is the
responsibility of the purchaser, designer, installer and end user to ensure that the total
door system is safe for its intended use.
2
MOTOR
TYPE: .................................Continuous duty
HORSEPOWER: ................1/3, 1/2, 3/4 & 1 Hp
SPEED:...............................1725 RPM
VOLTAGE:..........................115, 208-230 Single phase
230, 380, 460, 575 Three Phase
CURRENT:..........................See motor nameplate
MECHANICAL
DRIVE REDUCTION:.............Primary: Heavy duty
(5L) V-Belt. Secondary: #41 chain/sprocket. Output:
#48 chain (1/3 &1/2Hp) or #41 chain (3/4 &1Hp)
OUTPUT SHAFT SPEED:.....140 R.P.M.
DOOR SPEED: ......................11" - 12” per sec.
depending on door
BRAKE: .................................Solenoid actuated disc
brake on 3/4 & 1Hp
BEARINGS: ...........................Output Shaft: Shielded
Ball Bearing. Clutch Shaft: IronCopper sintered and
oil impregnated.
SAFETY
DISCONNECT:..............Quick disconnect door arm for
emergency manual door operation.
SAFETY PHOTO EYES: (Optional) Thru beam or retro
reflective devices used to provide non-contact safety
protection. Directly interface to Lift Master CPS-L or
CPS-LN4 Commercial Protector Systems.
SAFETY EDGE:............(Optional) Electric or pneumatic
sensing device attached to the bottom edge of door.
A REVERSING DEVICE IS STRONGLY RECOMMENDED FOR ALL COMMERCIAL OPERATOR
INSTALLATIONS. REQUIRED WHEN THE 3 BUTTON
CONTROL STATION IS OUT OF SIGHT OF DOOR
OR ANY OTHER CONTROL (AUTOMATIC OR MANUAL) IS USED.
SPECIFICATIONS
ELECTRICAL
TRANSFORMER:.............24VAC Secondary
CONTROL STATION:......NEMA 1 three button station.
OPEN/CLOSE/STOP W/ LED
WIRING TYPE:.................C2 (Factory Shipped)
Momentary contact to OPEN & STOP, constant pressure to CLOSE, open override plus wiring for sensing
device to reverse. See pages 15 thru 19 for optional
wiring types and operating modes.
LIMIT ADJUST: ................Linear driven, fully
adjustable screw type cams. Adjustable to 24 feet.
WEIGHTS AND DIMENSIONS
HANGING WEIGHT: .........80-110 LBS.
10-1/2”
Door Height Plus 4 feet (minimum)
20-1/2”
13-1/8”
HIGHEST POINT OF DOOR TRAVEL
4”
*
*
*
- For Units with Brake add 3-1/2”
(Standard on 3/4 & 1Hp models Optional on 1/3 & 1/2Hp)
3
OPERATOR PREPARATION
POWERHEAD ATTACHMENT
1. Position the track assembly on the frame of the
powerhead so that the motor side of operator is in
back (away from door ).
2. Loosely install two 3/8"-16 x 3/4" bolts and nuts in
third hole from the end of the track .
3. Align the track so that the bolts inserted in step 2
line up with the L-Slots in the frame.
4. Connect the track to the powerhead by fastening
two 3/8"-16 x 3/4" bolts and nuts through the frame
and the end holes in track. Tighten all four bolts to
secure the track to the powerhead.
TROLLEY CARRIAGE / CHAIN ATTACHMENT
1. Attach the take-up bolt to the trolley carriage using
3/8-16 hex nuts and lock washer, as shown below.
2. Using one of the master links, attach the chain to
the other end of the trolley carriage. Reel the chain
around the front idler shaft, over the spacer brackets,
back to the drive shaft sprocket, and then to the takeup bolt on the carriage.
3. Using the other master link, attach the chain to the
take-up bolt and tighten to the desired chain tension.
Chain Tension: With trolley positioned at either end
of the track, a properly adjusted chain will sag about
3" at the mid-point. If necessary, remove links from
the chain to achieve proper adjustment.
KEEP DOOR BALANCED. STICKING OR BINDING
DOORS MUST BE REPAIRED. DOORS, DOOR
SPRINGS, CABLES, PULLEYS, BRACKETS AND
THEIR HARDWARE MAY BE UNDER EXTREME TENSION AND CAN CAUSE SERIOUS PERSONAL
INJURY OR DEATH. CALL A PROFESSIONAL DOOR
SERVICEMAN TO MOVE OR ADJUST DOOR
SPRINGS OR HARDWARE.
WARNING
SPACER BRACKET
(Mounted Nylon Pad Side Up)
FRONT IDLER ASSEMBLY
TROLLEY CARRIAGE
L - SLOT
Master Link
Takeup Bolt
Roller Chain
Master Link
Hex
Nut
Straight Arm
Lockwasher
Hex Nut
TROLLEY ASSEMBLY
Take-Up Bolt
Trolley Carriage
TRACK ASSEMBLY
1. Using the 3/8"-16 x 3/4 " bolts and flange hex nuts
supplied, assemble the operator track by installing
and tightening the track spacer brackets. Position the
spacers evenly over the length of the track. NOTE:
The nylon pad on the spacer bracket should face up.
2. Using (2) 3/8"-16 x 1" bolts and lock washers,
install the front idler assembly to the second set of
holes of one end of the track. Refer to the illustration
below.
3. Slide the trolley carriage onto the track so that the
take-up bolt will be toward the operator.
Reel Chain
around Idler and
over Spacer Brackets
4
WARNING
IMPORTANT NOTE: Before the operator is installed, be sure the door has been properly aligned and is working
smoothly. Although each installation will vary due to particular building characteristics, refer to the following general procedures to install the operator.
MOUNT HEADER BRACKET
The trolley operator is generally mounted over the
center of the door. However, off center mounting may
be required due to interfering structures or location of
door stile / top section support. In such cases, the
operator may be mounted up to 24” off center on torsion spring doors. Extension springs require center
mounting.
1. Locate the center of the door and mark a line on
the wall directly above the door. Extend this line up
the wall.
2. Determine the highest point of door travel. Slowly
raise the door and observe the action of the top section. When the top section reaches its highest point,
use a level and project a line from this point to the
center line the of the door.
MOUNT OPERATOR
1. Allowing the motor to rest on the floor, raise the
front end of the track assembly to the front header
bracket and fasten using the 3/8”dia. x 6.40” long pivot
shaft and cotterpins supplied.
3. Using the projected lines for location, mount a
suitable wood block or length of angle iron to the wall
above the door opening. Refer to the illustration
below. This will provide a mounting pad for the front
header bracket of the operator. If necessary reinforce
the wall with suitable mounting brackets to ensure
adequate support of mounting pad. Using suitable
hardware, mount the (U shaped) front header bracket
to the pad.
Header Bracket Drill Pattern
2. Swing the operator to a horizontal position above
the guide rails and temporarily secure with a suitable
rope, chain, or support from the floor. Now open
garage door slowly, being careful not to dislodge the
temporary support. Using the door as a support,
place a level against the rail and shim the operator
until it is horizontal. Make sure that the operator is
aligned with the center line of the door.
Operator Alignment
Header Attachment
Door Travel
Projection
INSTALLATION INSTRUCTIONS
Pivot shaft
Cotterpins
Using the Door as support, shim
operator to a horizontal position.
Guide
Rails
OF DOOR
3.50”
1.75”
4” MIN.
High Rise Point
Projection Line
5
Carpenter's
Level
Header
Wall
High Arc
Point
INSTALLATION INSTRUCTIONS
OPERATOR SUPPORT
1. The illustration below shows a typical method of
hanging the operator from the ceiling. Each installation may vary, but in all cases side braces should be
used for additional strength.
2. For mounting of the support brace(s) to the powerhead, Four holes (clearance up to 3/8” bolts) are
located on each side of frame.
NOTE: If the operator is longer than 15 feet, use of a
mid-span support is recommended.
STRAIGHT ARM ATTACHMENT
1. Fully close the door and move the trolley slider to
within (2”) two inches of the front idler.
2. Latch the straight door arm to the fixed roll pin in
the trolley carriage. Make sure the open side of notch
on the arm faces the doorway.
3. Attach the door bracket to the door arm using the
3/8”-16 x 1” bolt and nylon locking nut provided.
Leave the nut and bolt loose enough to allow the two
pieces to pivot freely.
4. Using 3/8” hardware provided, bolt the curved
door arm to the straight arm, aligning the mounting
holes in such a way that the door bracket pivot bolt will
be in line with the top rollers on the door.
5. Position the door bracket to the center line on the
door. Using suitable hardware, attach the door bracket to the door. Many installations, except solid wood
doors, will require additional support for the door.
Refer to the illustration below.
IMPORTANT NOTE: At this time, ensure all bolts and
lag screws are properly secured.
Powerhead Support Brace
Mid-Span
Support Brace
Center Line of Door
Straight Arm
Door Bracket
Curved
Door Arm
FAILURE TO SUSPEND THE OPERATOR SECURELY
MAY RESULT IN SERIOUS PERSONAL INJURY OR
DEATH, AND/OR PROPERTY DAMAGE.
WARNING
To p
Roller
Pivot Bolt
6
WARNING
TO AVOID SERIOUS PERSONAL INJURY OR DEATH
FROM ELECTROCUTION, DISCONNECT ELECTRIC
POWER BEFORE MANUALLY MOVING LIMIT NUTS.
WARNING
LIMIT SWITCH ADJUSTMENT
MAKE SURE THE LIMIT NUTS ARE POSITIONED BETWEEN THE LIMIT SWITCH ACTUATORS BEFORE
PROCEEDING WITH ADJUSTMENTS.
If other problems persist, call our toll-free number for
assistance - 1-800-528-2806.
1. To adjust limit nuts depress retaining plate to allow
nut to spin freely. After adjustment, release plate
and ensure it seats fully in slots of both nuts.
2. To increase door travel, spin nut away from actu-
ator. To decrease door travel, spin limit nut toward
actuator.
3. Adjust open limit nut so that door will stop in open
position with the bottom of the door even with top
of door opening.
4. Repeat Steps 1 and 2 for close cycle. Adjust close
limit nut so that actuator is engaged as door fully
seats at the floor.
Retaining Plate
CLOSE Limit Switch
SAFETY
(Aux. Close) Limit Switch
OPEN Limit Switch
Actuator
PHOTO EYES & SENSING EDGES
Sensing devices supplied for door industry type operators with an isolated normally open (N.O.) dry contact output are compatible with your operator. This
includes pneumatic and electric edges, and through
beam and retro reflective photo eyes. If your door
does not have bottom safety photo eyes or a sensing
edge and you wish to add a safety device to your
application, please contact your local LiftMaster
Authorized Dealer.
If not pre-installed by the door manufacturer, mount
the sensing edge on the door according to the instructions provided with the edge. The sensing edge may
be electrically connected by either coiled cord or takeup reel.
Important Notes:
a) Proceed with Limit Switch Adjustments before
making any sensing edge wiring connections to
operator as described below.
b) Electrician must hardwire the junction box to the
operator electrical box in accordance with local
codes.
ENTRAPMENT PROTECTION ACCESSORIES (OPTIONAL)
WIRING:
For wiring of your sensing device to the operator,
refer to the wiring diagrams supplied on pages 13
and 14. See field connection terminals identified as
Reversing Device.
TAKE-UP REEL: Take-up reel should be installed
12" above the top of the door.
COIL CORD: Connect operator end of coil cord to
junction box (not supplied) fastened to the wall
approximately halfway up the door opening.
7
IT IS STRONGLY RECOMMENDED THAT A
SAFETY PHOTO EYE OR SENSING EDGE BE
USED IN CONJUNCTION WITH THE OPERATOR.
NOTICE
WARNING
8
DISCONNECT POWER AT THE FUSE BOX BEFORE
PROCEEDING.
OPERATOR MUST BE PROPERLY GROUNDED AND
CONNECTED IN ACCORDANCE WITH LOCAL ELECTRICAL CODES. NOTE: THE OPERATOR SHOULD
BE ON A SEPARATE FUSED LINE OF ADEQUATE
CAPACITY.
ALL ELECTRICAL CONNECTIONS MUST BE MADE
BY A QUALIFIED ELECTRICIAN.
WARNING
TO AVOID DAMAGE TO DOOR AND OPERATOR,
MAKE ALL DOOR LOCKS INOPERATIVE. SECURE
LOCK(S) IN "OPEN" POSITION.
IF THE DOOR LOCK NEEDS TO REMAIN FUNCTIONAL, INSTALL AN INTERLOCK SWITCH.
Before installing power wiring or control stations be sure to follow all specifications and warnings described below. Failure to do so may result in severe injury to persons and/or damage
to operator.
The operator electrical box is only to be accessed by trained “LIFTMASTER” technicians. If
service is required contact your local LIFTMASTER dealer.
Do not install any wiring or attempt to run the operator without consulting the wiring diagram.
Install the optional Reversing Edge before proceeding with the Control Station installation.
Remove the cover from the electrical enclosure. Inside this enclosure you will find the wiring
diagram(s) for your unit. Refer to the diagram (glued on the inside of the cover) for all connections described below. If this diagram is missing, call the number on the back of this manual.
DO NOT INSTALL ANY WIRING OR ATTEMPT TO RUN THIS OPERATOR WITHOUT CONSULTING THE WIRING DIAGRAM.
IMPORTANT SAFETY NOTES
INSTALL POWER WIRING & CONTROL STATION
ANY MAINTENANCE TO THE OPERATOR OR IN THE
AREA NEAR THE OPERATOR MUST NOT BE PERFORMED UNTIL DISCONNECTING THE ELECTRICAL POWER AND LOCKING-OUT THE POWER VIA,
THE MAIN DISCONNECT SWITCH. UPON COMPLETION OF MAINTENANCE THE AREA MUST BE
CLEARED AND SECURED, AT THAT TIME THE UNIT
MAY BE RETURNED TO SERVICE.
WARNING
INSTALL THE CONTROL STATION IN LINE OF SIGHT WITH
THE DOOR, BUT AWAY FROM THE DOOR AND ITS HARDWARE. IF CONTROL STATION CANNOT BE INSTALLED
WHERE DOOR IS VISIBLE, OR IF ANY DEVICE OTHER THAN
THE CONTROL STATION IS USED TO ACTIVATE THE DOOR,
A REVERSING DEVICE MUST BE INSTALLED ON THE BOTTOM OF THE DOOR. FAILURE TO INSTALL A REVERSING
DEVICE UNDER THESE CIRCUMSTANCES MAY RESULT IN
SERIOUS INJURY OR DEATH.
WARNING
WARNING
WARNING
WARNING
9
POWER WIRING CONNECTIONS
1. Connect power wires coming from the main to the
captive terminal block in the electrical box enclosure
marked with the label shown below.
2. Be sure to run all power wires through the conduit
hole in the electrical box enclosure marked with the label
shown below.
POWER WIRING
CONTROL STATION WIRING
CONTROL WIRING CONNECTIONS
1. Connect control wires to the TB1 terminal block
located on the Printed Circuit Board (shown below).
GROUND WIRING
ON THREE PHASE MACHINES ONLY:Incorrect
phasing of the power supply will cause the motor to
rotate in the wrong direction.
4 Feet
Approximate
MOUNTING INSTRUCTIONS
Control
Station
Optional
Controls
1. Mount Control Stations no further than (12”) from
each other.
2. Mount Control Stations (12”) from the door enclosure.
3. Mount WARNING NOTICE beside or below the
Control Station.
4. Mount MAINTENANCE ALERT label to either side
of control station.
1. Connect earth ground to the chassis ground screw in
the electrical box enclosure marked with the label shown
below.
2. Use same conduit entry into the electrical box as the
power wiring.
IMPORTANT: THIS UNIT MUST BE PROPERLY
GROUNDED. FAILURE TO PROPERLY GROUND
THIS UNIT COULD RESULT IN ELECTRIC SHOCK
AND SERIOUS INJURY.
RADIO CONTROLS
INSTALL POWER WIRING & CONTROL STATION (CONT’D)
1
2
3
4
5
6
7
8
9
10
11
12
13
SBC
CMN
STOP
CLOSE
OPEN
REV
IR
MAS
CMN
24AC+
24AC-
SINGLE BUTTON CONTROL
INTERLOCK
INTERLOCK
COMMON
STOP
CLOSE
OPEN
REVERSE
INFRARED PHOTO EYES
MAINTENANCE ALERT SYSTEM
COMMON
24 VOLT AC
24 VOLT AC
On all models with B2 control wiring, a terminal bracket
marked R1 R2 R3 is located on the outside of the electrical enclosure. Any commercial type LiftMaster brand
receiver may be mounted to this bracket. The operator
will then open a fully closed door, close a fully open
door, stop an opening door, and reverse a closing door
from the radio transmitter. In TS control wiring the operator will only open the door or reset the timer to close.
However, for additional door control from a 3 button
transmitter, a commercial three-channel radio receiver
(with connections for OPEN/CLOSE/STOP) is recommended.
2. Be sure to run all control wires through the conduit
hole in the electrical box enclosure marked with the label
shown below.
3. Apply power to the operator. Press OPEN push button
and observe direction of door travel and then Press the
STOP button.
If door did not move in the correct direction, check for
improper wiring at the control station or between operator
and control station.
TB2
13 24AC-
12 24AC+
11 CMN
10 MAS
9 IR
8 REV
7 OPEN
6 CLOSE
5 STOP
4 CMN
3
2
1 SBC
2
3
40-10033B
ANY MAINTENANCE OTHER THAN
PROGRAMMING OPTIONS IN THE OPERATOR
OR IN THE AREA NEAR THE OPERATOR MUST
NOT BE PERFORMED UNTIL DISCONNECTING
THE ELECTRICAL POWER AND LOCKING-OUT
THE POWER VIA, THE MAIN DISCONNECT
SWITCH. UPON COMPLETION OF
MAINTENANCE THE AREA MUST BE CLEARED
AND SECURED, AT THAT TIME THE UNIT MAY
BE RETURNED TO SERVICE.
Maintenance Alert
System
If light is Flashing,
it is time for routine
Door and Opener
Maintenance.
If light is Steady
On, call for
immediate service.
Service every
________ cycles.
TM
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