SVS 7 110V User Manual

SVS 7 LIFT

INSTALLATION INSTRUCTIONS

(110V)

SVS, INC. Lifting Your Image

2513 Jenks Ave
Panama City, FL 32405
www.svslifts.com

SVS 7 Lift Installation Instructions Page 1 of 18

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SVS 7 LIFT

INSTALLATION INSTRUCTIONS

SECTIONS: Page

1. General Description.................................................................................................................................3

2. Features & Specifications........................................................................................................................3

3. Lift Warranty...........................................................................................................................................4

4. Preliminary Installation Checks.............................................................................................................5

5. Considerations for Lift Placement..........................................................................................................6

6. Lift Supporting Structure........................................................................................................................7

7. Lift Installation.........................................................................................................................................9

8. Electrical Connections.............................................................................................................................10

a. How to Use the Wall Plate Controller..........................................................................................10

b. Connecting to a Touch Screen Controller (External Controller)..............................................11

9. Accessory Installation..............................................................................................................................12

10. Mounting the Projector...........................................................................................................................12

11. Cable Management..................................................................................................................................13

a. Cable Retainers..............................................................................................................................13

b. Accessory #7 Cable Retractor.......................................................................................................14

12. Setting the Show Position........................................................................................................................15

13. Maintenance and Adjustments...............................................................................................................15

14. Troubleshooting........................................................................................................................................17

SVS 7 Lift Installation Instructions Page 2 of 18

SVS 7 LIFT

1. General Description:

The SVS 7 Series Lift is designed to support projectors up
to 26-inches wide (66cm) and features lowering distances
from 9-feet (2.7m) to 22.5-feet (6.9m). This model is an
ideal solution for residential or commercial AV applications
with restricted ceiling clearances (projector is installed
between the Lift's scissors to minimize the vertical height of
the equipment in a closed position.).

Figure 1. shows the SVS 7 Series Projector Lift with
projector, Accessory #1 Ceiling Closure & Accessory #9
Projector Mount (projector not included, Accessory #1 and
Accessory #9 sold separately).

2. Features & Specifications

Figure 1. SVS 7 Series Projector Lift

Maximum Lowering Distance
SVS 7-9 9'0” (2.7m)
SVS 7-11 11'3” (3.4m)
SVS 7-13 13'6” (4.1m)
SVS 7-15* 15'9” (4.8m)
SVS 7-18* 18'0” (5.5m)
SVS 7-20* 20'3” (6.2m)
SVS 7-22* 22'6” (6.9m)

* Accessory #7 Cable Retractor Included

Lift Positions:

• Storage – Projector can be aesthetically stored above the ceiling when not in use.

• Show – Projector automatically positioned for show/operation.

• Service – Projector easily lowered for service.

Lift Capacity: Up to 700 lbs [317.5 Kg] Lift Weight: From 165 lbs [75 Kg]

Maximum Projector Width: 26” (66cm)

Voltage
Material

Low Voltage Control

• Wall Plate Controller supplied with lift

• 24VAC Contact Closure Control (latch to move lift)

• Connects to lift using supplied 12-pin connector and 75-feet of cable (22 AWG/9 Conductor)

• 110V/60Hz @ 1.5Amps

• Steel/Aluminum/Nylon

Lift height in Closed Position*
SVS 7-9 16” (40.6cm)
SVS 7-11 17.5” (44.5cm)
SVS 7-13 19” (48.3cm)
SVS 7-15* 20.5” (52.1cm)
SVS 7-18* 22” (55.9cm)
SVS 7-20* 23.5” (59.7cm)
SVS 7-22* 25” (63.5cm)

* accessories/supporting structure not included

• 220V/50Hz@ .75Amps

• Steel/Aluminum/Nylon

Precision Grooved Drum – Provides accurate and level tracking for consistent screen image.

Patented Fail Safe Drum Lock System – Insures safety in the event of mechanical failure. 100% safety

record for 20 years of manufacturing.

Quiet and Strong Motor – Extra quiet for meeting and presentations or simply for home use.

Redundant Limit Switches (up & down) – For secure and safe motor shutdown.

Cable Management System – Keeps cables out of the way during lift operation.

Operating Temperatures: 32°F to 104°F [0°C to 40°C] Maximum Humidity: 85%

SVS 7 Lift Installation Instructions Page 3 of 18

3. SVS 7 LIFT WARRANTY

SVS, Inc. 's limited warranty only covers failures due to defects in materials or workmanship that occur
during normal use. This limited warranty DOES NOT cover failures resulting from accident, misuse,
abuse, neglect, mishandling, misapplication, faulty or improper installation and set-up adjustments,
improper maintenance or alteration. Specific product warranties are as follows:

A 5-year parts and 90-day factory labor warranty applies to the following SVS products:

• All scissors style lifts

• Accessory #4 Power Sensor

• Accessory #5 Power Sensor with Screen Control

• Accessory #11 Extra Show Position

• Accessory #14 Floor Access Motor Control

• Accessory #15 12-Volt Trigger

A 1-year parts and 90-day factory labor warranty applies to the following SVS products:

• All Lift Motors

• Accessory #1 Ceiling Closure

• FP1 Closure Panel

• Accessory #2 Plenum Shroud

• Accessory #9 Projector Mount

• Accessory #10 Dual Stack Projector Mount

• Accessory #13 Platforms

A 60-day factory labor warranty applies to:

• Accessory #12 Decorative Cover

A Return Material Authorization (RMA) number must be received from SVS prior to the return of any
product. Products returned to SVS must be shipped adequately insured with freight prepaid and the
RMA number clearly noted on the shipping label and crate. Items received freight collect or without
RMA numbers clearly noted will be refused. Lift model, serial number, and proof of original purchase
date may be required before warranty performance is rendered.

SVS 7 Lift Installation Instructions Page 4 of 18

IMPORTANT: PLEASE READ THROUGH ALL INSTRUCTIONS

BEFORE BEGINNING YOUR INSTALLATION.

This Lift is designed to be used with a Wall Plate Controller, either automatically or manually controlled
and will function without any special training in the “Show” mode. The Wall Plate Controller features a
key switch which can be placed in the “Show” or “Auto” positions for normal operation. The “Off”
position disables the Lift. The “Service” position must be used only by trained technical personnel when
the Lift is lowered to floor level for service/access.

Note: The “Auto” position on the Wall Plate Controller is for Accessory #4 Power Sensor, Accessory #5
Power Sensor with Screen Control, and Accessory #15 12-Volt Trigger only

WARNING

To prevent personal injury and property damage when servicing any part of the Lift drive system
(electric motor/brake, drive chain/sprockets, steel lift cables, and/or drum lock assembly) the projector
must be removed and the Lift's lower frame supported by straps, chain, or cable to prevent it from
lowering unexpectedly while the drive system is being serviced.

IMPORTANT
Please read all Accessory Installation Instructions before beginning your installation. If an Accessory #2
Plenum Shroud or Accessory #12 Decorative Cover are to be installed with the Lift. Please read the
Accessory Installation Instructions before beginning your installation. The Lift support structure will
need to allow enough space to install the mounting hardware for the Plenum Shroud and/or Decorative
Cover.

TO AVOID CABLE SPILLS

• Do not push the lift bottom frame upwards once the Lift has been installed.

• Make sure that there are no obstructions in the Lift's path. If the bottom frame is lowered onto an

obstruction the cable will slack and spill over the cable drum.

4. PRELIMINARY INSTALLATION CHECKS

• SVS recommends that the Lift support structure holds at least four (4) times the weight of the Lift and

projector combined. Always follow your local building codes.

• Required space for the Lift, Projector, and accessories should be considered prior to installation. Check

for obstructions that may prevent the Lift or accessories from being installed or operated.

• Plan for necessary Lift low voltage control cabling, projector audio/video/control cabling, and power

connections.

• Do not install the projector on the Lift until the Lift, hardware, and any accessories have been properly

installed and are operational.

• This Lift has been adjusted with cables tightly packed on the cable drum and leveled for precise tracking

prior to being shipped from the factory. Do not remove the lift's shipping blocks until instructed to
do so in Section 7. SVS scissor lifts are shipped in a slightly open position to eliminate stress on the
limit switches and to maintain a tight cable pack on the cable drum. If physical height measurements are
taken before the blocks are removed from the Lift, they may not accurately reflect the height of the
closed Lift.

• All weight attached to the Lift must be centered between the lift's cables. The balance point of the

projector should be placed in line with the Lift cables (+/- 1-inch). If this is not possible you may need to
counter weight the Lift to keep the Lift level.

• As a reminder, clear all persons and obstructions from the Lift's path during its operation. Keep fingers

SVS 7 Lift Installation Instructions Page 5 of 18

and other objects away from the scissors and other moving parts. Technical personnel should always be
present whenever the Lift is in the Service mode.

5. CONSIDERATION FOR LIFT PLACEMENT

• Before beginning the installation, check the dimensions of the lift against the available space above the

ceiling. Be sure to include the projector lens and any accessories which may add to the overall
dimensions

• Preliminary measurements should also be made to layout the orientation of the projector and lift to the

screen. Consider if the lens is offset from the center of the projector and thus the center of the Lift.

Figure 2. SVS 7-9, SVS 7-11, SVS 7-13 Lifts Side and Front View

Figure 3. SVS 7-15, SVS 7-18, SVS 7-20, SVS 7-22 Lifts Side and Front View

SVS 7 Lift Installation Instructions Page 6 of 18

Figure 4. SVS 7 Series Top View

SVS 7-9, SVS 7-11, SVS 7-13 LIFTS WITH CABLE RETAINERS

SVS 7-15, SVS 7-18, SVS 7-20, SVS 7-22 LIFTS WITH CABLE RETRACTORS

6. LIFT SUPPORTING STRUCTURE

The SVS 7 Lift should be mounted from four 1/2” rods. The mounting hole locations are marked with a <M> in
Figure 4. The thread rods must be supported by a rigid structure. If the threaded rods exceed more than 2-feet
(0.6 M) from the support structure to the lift's top mounting holes cross bracing should be installed between the
support rods. Figure 5 shows the cross bracing and the correct height for mounting the lift above the false
ceiling.

Figure 5. Cross Bracing & Correct Height

SVS 7 Lift Installation Instructions Page 7 of 18

If the ceiling clearance allows, an “X-Y” or a cross-supporting structure is strongly suggested as shown in
Figure 6 Recommended Lift Support Structure for Flat Ceilings. This allows for front-to-back and side-to-side
adjustments of the Lift for alignment to the screen.

Figure 6a. Recommended Lift Support Structure for Flat Ceilings

Figure 6b. Recommended Lift Support for Beam Ceilings

SVS 7 Lift Installation Instructions Page 8 of 18

Important

When attaching the Lift to a flat concrete ceiling, SVS suggest two (2) pieces of P1000T Unistrut (or
equivalent) approx. 10-feet (3.04 m) long, to be installed on the ceiling first. Proper spacing between the two
pieces will be based on the distance between the four (4) mounting holes of the Lift as shown in Figure 4.

You should use at least four (4) 1/2” bolts and anchors evenly spaced on each piece of Unistrut to distribute the
weight of the supporting structure. Attach the two lower pieces of Unistrut to the upper two pieces of Unistrut
using 1/2” threaded rods to the Unistrut, using Unistrut P3010 1/2” channel nuts in the channel, along with a
locking washer and nut below the channel to lock into place.

IMPORTANT
If you are installing an Accessory #2 Plenum Shroud or Accessory #12 Decorative with the Lift, please
read the Accessory Installation Instructions before beginning your installation. The Lift support structure
will need to allow enough space for the Plenum Shroud and/or Decorative Cover mounting hardware

7. LIFT INSTALLATION

a. Preparation:

1. The Lift is shipped in a wooden crate.

2. Do not remove the Lift from the crate until you are ready to install it.

3. The Installation Instructions, Wall Plate Controller with control cable, and projector mounting hardware
are located in a cardboard box inside the crate.

4. Unbolt the Lift from the bottom of the crate to remove the lift from the crate.

b. Installing the Lift in the Ceiling

1. Raise the Lift into the ceiling and line up the four
(4) mounting holes in the Lift's top frame with the
1/2” threaded rods of the supporting structure. Make
sure that there is a top nut and a flat washer on each
threaded rod before the Lift is mounted. See Figure

7. (Plenum Shrouds & Decorative Cover require
additional hardware installed on the threaded rods
before the Lift.)

2. Once the Lift's top frame has been inserted, add a
hexnut to each threaded rod below the Lift frame.
Always leave the top nut loose to allow adjustments
until the Lift is leveled.

3. Level the Lift's top frame side-to-side and front-to­back using the lower hexnuts on the threaded rods.

4. Once the Lift is leveled, secure the Lift to the

Figure 7. Lift Mounting Hardware

threaded rods by tightening the upper hexnuts. Do
not over tighten the fasteners as it could distort the
Lifts top frame.

5. If the Power Sensor is used, please refer to the Power Sensor Instructions, otherwise, plug the 12-pin
connector of the Wall Plate Controller into the 12-pin socket on the Lift's gray electrical box mounted on
the Lifts top frame. The Wall Plate Controller includes 75-feet of cable and is shipped with the Lift. It is
located in the cardboard box attached to the lid of the Lift's shipping crate.

6. Once the Lift is properly installed in the ceiling and leveled, you can remove the shipping blocks.

SVS 7 Lift Installation Instructions Page 9 of 18

Remove the blocks by removing the screws and tie-raps holding them in place.

TO AVOID CABLE SPILLS

• Do not push the lift bottom frame upwards once the Lift has been installed.

• Make sure that there are no obstructions in the Lifts path. If the bottom frame is lowered onto an

obstruction the cable will slack and spill over the cable drum. If the cable spills over the cable
drum and the Lift is not stopped the cable will back-wind onto the cable drum causing severe
damage to the Lift and accessories.

8. ELECTRICAL CONNECTIONS

Electrical connections should be made at this time. The SVS 7 Lift requires 110V/60Hz at 2.3 Amps and is
supplied with a six foot power cord. The SVS 7 Lift is controlled with a 24VAC Low Voltage Controller called
the Wall Plate Controller. This controller can easily be connected to external controllers like Crestron, AMX,
Extron, etc. The Wall Plate Controller is supplied with 75-feet of cable (22 AWG, 9 conductor).

Wall Plate Controller Information

Wire Color Connector Pin Function

Brown 3 Down to Show Position when 24VAC connected from Pin 1

Green 4 Down to Service Position when 24VAC connected from Pin 1

Red 2 Up when 24VAC connected from Pin 1

White 1 24 VAC Out (Common) (can be measured between Pin 1 and Pin 7)

Black 7 Power LED Return (Ground)

Orange 8 Power LED+

1. Make sure that the area below the Lift is clear and that all cable are clear of the Lift.

2. Apply power to the Lift by plugging it into an AC Outlet.

a. How to use the Wall Plate Controller

1. To lower the Lift to the Show position, turn the key switch to the Show
position and press the toggle switch down. The lift will lower as long as you
hold the toggle switch down, the lift will stop when the rear scissor roller
compresses the Show Position microswitch.

2. To lower the Lift to the Service position, turn the key switch to the Service
position and press the toggle switch down. The Lift will lower as long as
you hold the toggle switch down, the Lift will stop when the rear scissor
roller compresses the Down Limit microswitch. The Service position
bypasses the Show Position microswitch.

3. To raise the lift press the toggle switch up. The Lift will rise until the Up
Limit microswitches are compressed. The Lift will rise as long as you hold
the toggle switch up. The Lift can be raised with the key switch in either the
Show or Service positions.

4. The Off position on the key switch disables the Lift.

5. The Power light only comes on when the Lift is raising or lowering (Lift
motor turning), not when power is applied to the Lift.

Figure 8. Wall Plate

Controller

Important: The toggles switch on the Wall Plate Controller must be pressed to raise or lower the Lift, releasing

SVS 7 Lift Installation Instructions Page 10 of 18

the toggle switch stops the Lift. This is designed as a safety feature. The key switch is an extra precaution, when

VIEW FROM BACK

(24vac)

+

-

(SERVICE)

C

2

1

G RN

BRN

UP

PU R

BLK

BLU

WHT

MO TO R
PO WER O N

WHT

DOWN

SHOW-OFF-SERVICE

RP2 (CONNECTS TO RJ2)

YEL

(SHOW)

RED

WHT

ORN

BLK

G RN

RED

WHT

BLK

ORN

G RN

BRN

BRN

32

1

4 5 6

9

8

7

12

11

10

WALL PLATE CONTROLLER

the key is removed, the Lift is secure.

b. Connecting a Touch Screen Controller (External Controller)

The simplest external controller connections are to use the White wire (pin 1) as the common and the Brown
wire (pin 3) for down to Show position and the Red wire (pin 2) for up. For this and other wiring options please
refer to the external controller wiring diagrams in the Appendix. Also:

1. Program a release of relays to stop the Lift on up and down positions

2. Program a time out after the normal runtime, 2 seconds max. (SVS Lifts raise/lower at 1-inch/second.)

3. Program an exclusive lockout on up and down so that both cannot be activated at the same time. ( Note:

4. Hold relays on to raise/lower the Lift.

5. Never leave voltage on the up and down. Always program a release after the travel time has been

If you have any questions please contact SVS for proper wiring.

SVS Lifts have a lockout function that disables the Lift when it receives a up and down command at the
same time. Removing one of the two commands releases the lockout condition.)

achieved.

Figure 9. Wall Plate Controller Wiring Diagram

SVS 7 Lift Installation Instructions Page 11 of 18

9. ACCESSORY INSTALLATION

Please refer to the accessory installation instructions located in the accessory shipping crates for specific
instructions for each accessory. The Accessory #2 Plenum Shroud and Accessory #12 Decorative Cover require
that hardware be added to the threaded rods supporting the Lift before the Lift is installed. The Accessory #1
Ceiling Closure and FP1 Closure Panel attach the ceiling closure support brackets on the platform of the Lift
using supplied threaded rods.

10. MOUNTING THE PROJECTOR

• After checking the Lift operation
and all clearances you can install
the projector on the Lift. The
projector can be installed using a
ceiling type projector mount
(inverted) or using an Accessory
#13 Metal Platform (non-inverted).
For custom mounting option please
contact SVS, Inc.

• The Projector can be attached to the
Lift using an Accessory #9
Projector Mount from SVS or a
standard ceiling type projector
mount. The projector mount is
required to attach the projector to
the Lift. The base box of the

Figure 10. Projector Mounting

projector mount will need to be
bolted to the Lift. The mount should be centered side-to-side with the Lift Frame. See Figure 10.

• If a ceiling type projector mount is not available for the projector or if the projector needs to be non­inverted, the projector can be placed on an Accessory #13 Metal Platform. The Accessory #13 Metal
Platform is a shelf mounted below the Lift to support the projector.

• All weight attached to the lift must be centered between the lift's cables. The balance point of the
projector should be placed in line with the lift cables (+/- 1-inch). If this is not possible you may need to
counter weight the lift.

Leveling the Projector

• If you can not level the projector using the projector's leveling adjustments, you can adjust the level of
the lift.

• Level corrections are made with the projector mounted after confirming that the cable is packed tightly
and is straight on the Cable Drum.

• It is best to lower the lift to the Service position and then completely up before leveling the projector.

• Level adjustments should be made with the projector in the Show position.

• Position a level across the front of the projector. Fine adjustments are done by adjusting the nuts on the

bottom of the cable eye bolts. Raise and lower the Lift until satisfactory level is achieved.

• After adjustments are made tighten the eye bolt nuts.

SVS 7 Lift Installation Instructions Page 12 of 18

11. CABLE MANAGEMENT

Cable Management is used to keep projectors cables away from the scissors during Lift operation. Do not attach
the projector cables to the scissors of the Lift as they could be repeatedly pinched when the Lift raises and
lowers. See Figure 11.

a. Cable Retainers

Cable Retainers are standard equipment on SVS 7-9, SVS 7-11, AND SVS 7-13 Lifts. The Cable Retainers are
installed on scissor extensions in the rear of the Lift. If your Lift is equipped with Cable retainers attach the
projector cables as demonstrated in Figure 12.

Figure 11. Cable Retainers (Left) and Cable Retractor (Right)

SVS 7 Lift Installation Instructions Page 13 of 18

Figure 12. Cable Retainer Installation

b. Accessory #7 Cable Retractor

Accessory #7 Cable Retractor is standard equipment on SVS
7-15, SVS 7-18, SVS 7-20, AND SVS 7-22. See Figure 11.

The Cable Retractors are a spring-loaded reel on the rear of
the Lift. The retractor automatically retracts your cable as
the Lift ascends and releases your cable as the Lift descends.

Warning: Over-winding the reel or winding the reel

counter-clockwise will damage the cable reel springs.

Broken cable reel springs are not be cover by the Lifts

warranty.

Instructions:

1. Please read all instructions before installing your
cable on the Cable Retractor cable reel.

2. Lower the Lift to its maximum down position
(Service position).

3. Clamp your cable securely to the outrigger on the
top frame of the Lift.

4. Wind the cable reel clockwise:

 2 ¾ complete turns for the SVS 7-9
 3 ¼ complete turns for the SVS 7-11
 4 complete turns for the SVS 7-13
 4 ½ complete turns for the SVS 7-15
 5 ¼ complete turns for the SVS 7-18
 6 complete turns for the SVS 7-20
 6 ½ complete turns for the SVS 7-22

Figure 13a. Cable Retractor (inside view)

5. Hold the cable reel in this position to stop the reel
from unwinding.

6. Attach upper half of your cable to the cable reel

Figure 13b. Cable Retractor (side view)

between two of the four (4) holes with 3/16” tie-wraps. Leave the tie-wraps semi-loose in case
adjustment is needed.

SVS 7 Lift Installation Instructions Page 14 of 18

7. Make one and a half turns around the cable reel counter clockwise with your cable. Lock your cable in

the same way as in Step 6, to the two remaining holes (180° from the first holes used.)

8. Clamp your cable securely to the outrigger on the bottom frame of the Lift.

9. Run the Lift up and down to check the slack in your cable. Your cable will be slacked at the top of the
Lift when the Lift is in a full up position, and equally slacked at the bottom in a full down position.

Note: The Cable Retractor is located near the center of the scissors, but due to different number of scissors and
the opening time of the scissors, there can be slack in your cable above or below the cable reel as the Lift
lowers. Excess slack can be removed by adjusting the cable clamping on the cable reel after tracking the Lift up
& down. If the slack is adjusted correctly, the cable will be more even when in the up and down positions, with
slack occurring only in the middle position.

10. When proper cable tension is achieved, you can securely tighten the tie-wraps.

12. SETTING THE SHOW POSITION

The Show position is adjusted by positioning the Show position
microswitch located on the rear right of the Lift's top frame so that
the large roller washer compresses the Show position switch when
the Lift reaches the Show position.

1. Place the key switch in the Service position and lower the
Lift to the desired Show Position.

2. Loosen the thumb screw holding the Show microswitch
(bracket) in place and slide the Show microswitch
(bracket) along the Lift frame until the large roller washer
compresses the microswitch. You should hear a slight click

Figure 13. Show Position Adjust

as you position the microswitch over the washer and the microswitch is compressed.

3. Moving the Show microswitch toward the rear of the Lift raises the Show position and moving the
Show microswitch toward the front of the Lift lowers the Show position.

4. Tighten the thumb screw. Make sure that the microswitch is not positioned too close to the washer
because the washer must be able to pass under the microswitch to reach the Service position.

5. The Show position is now set. Raise the Lift to a closed position and place the key switch in the Show
position and press the toggle switch down. The Lift will lower and stop at the Show position you set. It
maybe necessary to repeat steps 1 through 3 to get the Show position set where you want it.

6. The Lift will only stop at the Show position when lowering from above the Show position and not when
rising from below the Show position.

7. The Show position is adjustable with an accuracy of +/- 1/8-inch (0.32 cm).

13. MAINTENANCE AND ADJUSTMENTS

a. Maintenance

• Inspect the Lift occasionally for any loose bolts or cable clamps. The scissor bolts are adjusted for no
slack, but must not be too tight. If scissor bolts are found loose, tighten to approximately 151 lbs torque,
the back off 1/8-inch. These bolts have nylon locking nuts and should stay at this position.

• Check Lift and projector cables for damage or wear.

• Check the Drum Lock Assembly to see if the Drum Lock solenoid energizes and raises the Drum Lock

arm when you press the Down toggle switch to lower the Lift. At all other times the Drum Lock
solenoid is de-energized and the Drum Lock arm stays in its down position. If the solenoid does not pull
up, the microswitch will not allow the motor to turn when to lowering the Lift.

• Check the Drum Lock pawl (white nylon piece) located on the Cable Drum. The pawl should move
freely and drop when when it reaches the top of the Cable Drum's rotation, avoiding contact with the

SVS 7 Lift Installation Instructions Page 15 of 18

Drum Lock arm. If the drum rotates too fast, the pawl will swing out and catch the arm, locking the
drum after the first rotation.

• The Cable Drum Bearings (pillow block bearings) are pre-lubricated and do not require attention.

• The Lift motor does not require attention. If the magnetic brake (part of the Lift motor) does not hold

properly, it should be replaced immediately.

WARNING

To prevent personal injury and property damage when servicing any part of the lift drive system (electric
motor/brake, drive chain/sprockets, steel lift cables, and/or drum lock assembly) the projector must be
removed and the lift's lower frame supported by straps, chain, or cable to prevent it from lowering
unexpectedly while the drive system is being serviced.

Figure 14. Lift Part Locations

SVS 7 Lift Installation Instructions Page 16 of 18

14. TROUBLESHOOTING

All SVS Lifts are quality checked before they leave the SVS Factory and are fully operational. Shipping
damage and installation oversights can cause problems to appear. Here are a few common and simple things to
check. If at anytime you are unsure of the check, please contact SVS, we will be happy to help you troubleshoot
your problem.

Symptom Possible Cause(s) Solution

Lift does not move Lift is not plugged into AC outlet or

AC outlet circuit breaker off.

Is the Wall Plate Controller
connected to the Lift?

Check the Lift Power fuse located
on the Lift Control Box

Lift power supply At the Wall Plate Controller

The Drum Lock Solenoid does not
energize when you press the toggle
switch down.

Note: The Drum Lock Arm being
down will cause the Drum Lock
microswitch to disable the Lift
motor.

Make sure Lift is plugged in and
circuit breaker is turned on.

Plug the Wall Plate Controller into
the Lift Gray Control Box 12-pin
Clinch-Jones connector.

If the fuse is blown see Blown Fuse
Symptom.

terminal strip measure the AC
voltage between the white and
black wires, the voltage should be
about 24VAC, if not contact SVS.

Disconnect one of the solenoid
wires and measure the resistance
across the solenoid terminals. If the
resistance is less than 9.5 ohms
replace the solenoid.

The Drum Lock Arm does not raise
when the Drum Lock Solenoid
energizes.

Check the Drum Lock Linkage
between the Drum Lock Solenoid
and Drum Lock Arm. If the Linkage
is disconnected, reconnect. If
broken, replace it.

Drum Lock microswitch damaged Check Drum Lock microswitch

Blown Fuse Power Transformer Shorted Unplug the lift, replace the fuse,

and measure across the two flat
prongs of the AC plug. If the
resistance is less than about 19-22
ohms, replace the transformer.

Drum Lock Solenoid Disconnect one of the solenoid

wires and measure the resistance
across the black and green wire. If
the resistance is less than 9.5 ohms
replace the solenoid.

SVS 7 Lift Installation Instructions Page 17 of 18

Lift works with the key switch in
the Service position but will not
lower in the Show position

The Show position microswitch
may be set too near the rear of the
Lift and is compressed by the roller
washer.

Set Show position

The Show microswitch or
associated wiring has been
damaged

Lift works with the key switch in
the Service position but only lower
very little in the Show position

The Show position microswitch
may be set too near the rear of the
Lift.

Lift does not lower but will rise Down Limit microswitches or

associated wiring damaged

Lift does not raise but will lower Up Limit microswitches or

associated wiring damaged

Lift stopped working after being
connected to an external controller

External controllers can not be used
with Accessory #4 Power Sensor,
Accessory #5 Power Sensor with
Screen Control, or Accessory #15
12Volt Trigger.

Look for damage. Check for
continuity from the Wallplate
Controller to the Show
microswitch.

Set Show Position

Look for damage. Check for
continuity from the Wallplate
Controller to the Down Limit
microswitch.

Look for damage. Check for
continuity from the Wallplate
Controller to the up limit
microswitch.

Contact SVS to disable Power
Sensor or 12Volt Trigger

Wall Plate Controller key switch in
the wrong position

If the external controller is closing
the contacts between the White wire
and the Red wire at the same time
that it is closing the contacts
between the White wire and Brown
wires, the Lift will go into a
lockout, and will not work until one
of the closed contacts is opened.

If the Wall Plate Controller and
external controller are paralleled
and they are closing different
contacts the Lift will go into a Lock
Out.

Place key switch in the Show
position

Correct external controller
programming

Place the Wall Plate Controller key
switch in the off position when
using the external controller. Turn
off the external controller when
using the wall Plate Controller

SVS 7 Lift Installation Instructions Page 18 of 18