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Question posted by Danl97549 on April 2nd, 2017

Blown Fuse

we keep blowing a fuse in the unit. Power source has been confirmed to be good with no shorts. Grounding has been checked and approved. Neutral connection on the 120v side is connected correctly. Panelboard it is being fed from is properly grounded and bonded as it is the first point of disconnect from the transformer it is being fed from. The gate arm is not binding and the belt tension is not too tight.

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Answer #1: Posted by waelsaidani1 on April 2nd, 2017 4:43 PM

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waelsaidani1

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If the gate is out of adjustment and slams the stops to hard, it could blow fuses. Replace the fuse and adjust the limits on the open or close side so the operator stops running just prior to hitting the stops. The stops are only intended to position the gate firmly open or shut. They are not meant to literally stop the gate.

Related LiftMaster MATDCBB3 Manual Pages

MEGA ARM / MEGA ARM TOWER Manual - Page 2

... Operator to the Concrete Pad Install the Barrier Arm WIRING Power Wiring Input Commands Connections Accessory and Relay Connections Battery Installation Primary/Second Wiring INSTALL THE RECEIVER FEATURES AND ... this Signal Word on the following pages, it will alert you to your commercial door and gate operator unless you are an Authorized Service Technician. 2 MECHANICAL ELECTRICAL 15...

MEGA ARM / MEGA ARM TOWER Manual - Page 3

...operate the operator open and close . Type D: Connections provided for a... sensing system, self-contained within two seconds of entrapment protection correctly matches each of entrapment protection systems recognized by security personnel. ...or building such as a multi-family housing unit (five or more single family units) hotel, garage, retail store or other building servicing the ...

MEGA ARM / MEGA ARM TOWER Manual - Page 4

...gate operator is prevented from the bottom of the gate to a minimum of 4' (1.2 m) above the ground at least six feet (6') away from passing through the gate to reduce the risk of a gate system...The operator is intended for an individual application. 2. b. All openings of a swing gate is greater than 6" (152 mm) above the ground to start. 10. The gate must be supplied with the ...

MEGA ARM / MEGA ARM TOWER Manual - Page 5

... the art MOSFET motor drive technology, NO contactors or relays. • Soft start and stop in open on enamel. Refer to Accessories page. • All rust proof aluminum construction with white powder coat baked on AC power failure). • Raise gate input memory will memorize multiple vehicles - Heater option available for 120...

MEGA ARM / MEGA ARM TOWER Manual - Page 6

...for the 120/230 Vac main power, low voltage control wiring, and one or two extra for the operator. The concrete pad should be UL approved. 3 Pour a concrete pad...5-1/4" (door) 12-1/4" 14-1/4" 6 Conduit size should always extend below frost line in order to reduce crowding if more than four are needed. NOTE: Pad should be approximately 24" x 24" x 24" in regions where ground will ...

MEGA ARM / MEGA ARM TOWER Manual - Page 8

... White Neutral Pedestal Version Ground 120 Vac Top End of the power disconnect should be visible and clearly labeled. • ALL power and control wiring MUST be run the operator without consulting the wiring diagram. Upon completion of maintenance the area MUST be cleared and secured, at the fuse box BEFORE proceeding. POWER WIRING Use UL approved...

MEGA ARM / MEGA ARM TOWER Manual - Page 9

... input is given. NOTE: Above inputs are tied to LED indicators to exit loop, gate opens; Make connections to the appropriate points for the close . Wires should be routed through the upper grommet in...the top of the control board. These are to be UL approved 600 volt rated and at the close loop before arm reaches full open dry contacts. If used for the desired operation. Use with...

MEGA ARM / MEGA ARM TOWER Manual - Page 10

.... (Refer to pages 14-15.) Relay Connection Terminals on shelf next to motor. 3 Connect red lead from the operator control board to the positive (RED +) terminal of one battery. 4 Connect the black lead from the operator control board to install batteries correctly will cause damage and will pulse relay when arm reaches full open position.

MEGA ARM / MEGA ARM TOWER Manual - Page 11

... reverse and open and close are for it is required that if one gate senses an obstruction, the other that a closing obstruction has occurred and for transmitting IRD (obstruction signals) between the primary J3 and second J3 (Figure 2). SET switches on S2, 1-8 the same on both operators MUST share a common ground connection from...

MEGA ARM / MEGA ARM TOWER Manual - Page 12

...connect power to opener (Figure 3). 2 Press and release the "learn " button on either the receiver or the remote control is properly adjusted, and there are for a common and a relay. NEVER permit children to operate, or play with remote control transmitters. • Activate gate or door...of moving gate or garage door: • ALWAYS keep gate or garage door in sight until the ...

MEGA ARM / MEGA ARM TOWER Manual - Page 13

... radio receiver (provided), move the radio wire from right-hand to terminal 4 on the J5 terminal strip. Connect power to the right, it is manually forced UP (OPEN), the barrier arm will activate throughout the OPEN cycle. If an antitailgating alarm is to S1-4 DIP switches. If the barrier arm is to the operator...

MEGA ARM / MEGA ARM TOWER Manual - Page 14

...CLOSE DIP Switch S2-1 to S2-5 The S2-1 to the OFF position. I FAIL SAFE (AUTO OPEN ON AC POWER FAILURE) DIP Switch S2-8 With S2-8 DIP switch in the ON position, the barrier arm will ...DIP switch (Auto Close) should be used for common. The barrier arm will remain OPEN before CLOSING. Once the power has been restored the operator will resume normal operation after the set the period of ...

MEGA ARM / MEGA ARM TOWER Manual - Page 15

...the gate operator. After adjusting the force or the limit of the arm. Disconnect ALL power BEFORE performing ANY maintenance. 9. If the arm is obstructed while closing the arm will stop...Keep the remote control away from the gate. INSTANT REVERSE DEVICE (IRD) Adjustments to the open and close . Turning the IRD1 right (clockwise more sensitive), or left (counter clockwise less...

MEGA ARM / MEGA ARM TOWER Manual - Page 16

... into operation. Connect AC power and batteries. 10. BATTERY REPLACEMENT Service Kits are better than the small hole size of in the following chart: ITEM PROCEDURE EVERY 3 MONTHS Fasteners Check and tighten as a hazardous waste and disposed of the pin. (Correct pin (P/N MA013) is a 2" pin with hammer and punch (Solid sharp blows are available for...

MEGA ARM / MEGA ARM TOWER Manual - Page 17

...and then backs away, it will be 4 to 10 feet. 17 Terminals #1, 2, and 3 are open when activated by exit loop and then close once the close the gate, use ONLY on a dedicated...Close Loop Mega Arm Card Reader Tele-entry Radio Control ENTRY WITH ACCESS CONTROL DEVICE Gate will open or close loop is cleared. Terminal #6 is close input. RECOMMENDATIONS: • If vehicle ...

MEGA ARM / MEGA ARM TOWER Manual - Page 18

...TRAP CONFIGURATION Must use trap kit. INSTALL THE K1 AUXILIARY RELAY AND CONNECTOR AT THE SECOND 1. Connect the common output (C) of the K1 relay of the trap operator to the common of the ...S1-6 OFF S1-8 ON OPEN Trap MA C NC NO DC K1 S1-6 OFF S1-8 OFF MA Opener Common SET THE DIP SWITCHES AT THE SECOND OPERATOR 1. Reconnect the DC power by replacing the neutral (Black) wire to the...

MEGA ARM / MEGA ARM TOWER Manual - Page 19

...that was the unused SHADOW LOOP input on the MEGA ARM. This will only raise if an intended open device (24 hour timer, toggle switch) can be available at .5 amps through relay). Run 2 wires...8226; For motorized teeth, vertical pivot or overhead operator, leave S1-6, S1-8 OFF (this will open the COMMON and NORMALLY CLOSED contact on , jumper across the JP2 terminal to allow the original ...

MEGA ARM / MEGA ARM TOWER Manual - Page 20

... properly. D12: Battery status. F3: 10 amp ATO type fuse for 24 Vac input power. (UL listed fuse only.) F4: 15 amp ATO type fuse for normal operation. Free Exit Loop Shadow Loop Commons - 0 Vdc C18 U18 C15 Q6 Q5 Q4 D28 Open Limit Sensor Open Drivers On Motor Brake On Close Drivers On Close Limit...

MEGA ARM / MEGA ARM TOWER Manual - Page 21

... connected (set with R63, shown on ? Yes Make sure the gate is approximately 24.5 Vdc. NOTE: If LED D12 does light, gate will open . Yes Is the "BAT LO" LED on the Control Board Layout page). Correct voltage is not binding, then adjust the IRD. No Check fuse F3, Replace if blown. Remove AC and battery power...

MEGA ARM / MEGA ARM TOWER Manual - Page 22

... Surge Suppressor Collar Nylon Washer MEGA ARM TOWER UNIQUE PARTS LIST QTY ITEM PART NUMBER DESCRIPTION 1 * MA020T Operator Cover for Mega Arm Tower 1 * MA020D Operator Door for Mega Arm Tower 1 1 MEGA ARM OPTIONS PARTS LIST 2 ITEM PART NUMBER DESCRIPTION 10 * 71-TRAP Trap option 2 * 71-SPRINT Sprint option * 71-TRAPSP Sprint...