Lippert Components Happijac User manual

Happijac®Bed Lift
OEM INSTALLATION MANUAL

Rev: 07.03.18 Page 2 CCD-0001541
TABLE OF CONTENTS
System Information 2
Safety 2
Preparation 3
Resources Required 3
Pre-Installation 3
Installation 3
Motor and Connecting Shaft 4
Wiring the System 6
Wiring Diagram 7
Relay Control Module 7
Testing the System 8
Trolley Travel 8
Bed Lift Operation 9
Motor and Brake 9
Limit Switches - Microswitches 10
Bed Lift Control Switch - LCI-Supplied Switch Only 10
Relocating Limit Switches 11
Manual Operation 12
Manually Raise the Bed(s) 12
Manually Lower the Bed(s) 13
Always wear eye protection when performing service or maintenance to the bed lift system. Other
safety equipment to consider would be hearing protection, gloves and possibly a full face shield,
depending on the nature of the service.
Moving parts can pinch, crush or cut. Keep clear and use caution.
System Information
These ratings are for the lifting mechanism only. Attachments, such as bed platforms or sofas, are not rated
in this document. Load ratings for these items are the responsibility of the manufacturer.
• Voltage = 12V DC
• Nominal current draw = 8 amps (1 bed going up); 12 amps (2 beds going up)
• Load limit = 450 lbs dynamic (moving) load; 500 lbs static (stationary) load
Safety
Always make sure that the bed lift platform is clear of people and objects before and during
operation of the bed lift.

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Fig. 1
Motor
Vertical Rails
Trolley Tabs
Manual
Crank Point
Manual
Crank Point
A pinched travel limit microswitch wire can cause damage to the bed lift system. Make sure
installed lower vertical rail mounting screws do not pinch, cut, crush or otherwise interfere with any
functional element of the bed lift system.
Preparation
Resources Required
• Two people, depending on task
• ½" socket wrench
• ¼" diameter wood or self-tapping sheet metal screws (OEM-supplied)
Pre-Installation
1. The bed lift frame (Fig. 1) must be installed squarely, at the same height side-to-side and at the same
distance from front-to-back in the unit with vertical rails parallel side-to-side. Leave wooden packing
strips in place until system is secured to the unit.
2. Sufficient backing, a minimum of ⁄" aluminum tube or wood, must be incorporated within the walls
of the unit to support the load of the bed lift with bed platforms installed. The bed lift is rated at 500
lbs per platform attachment (static load).
Installation
1. Use ¼" diameter wood or self-tapping sheet metal screws (OEM-supplied) of sufficient length to safely
secure the C-channel vertical rails to hold 500 lbs per platform attachment (static load).
NOTE: Screws MUST NOT interfere with any moving parts of the bed lift system.
NOTE: The number of mounting holes will vary according to the vertical rail length of the system
being installed.
NOTE: Use the smaller holes for alternate mounting locations of the upper bunk stop.

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2. The ¼" diameter wood or self-tapping sheet metal screws (OEM-supplied) must be used in all large
holes of the vertical rails, including the large double mounting holes at the top (Fig. 2) and bottom
(Fig. 3) of the rails, to prevent rail-twist.
Fig. 2 Upper
Mounting
Holes
Fig. 3
Lower
Mounting
Holes
Microswitch
Travel Limit
Wire
3. After the rails are installed:
A. Check the rails for squareness and parallelism.
B. Remove wooden packing strips.
Motor and Connecting Shaft
1. Motor may be installed inward (Fig. 4) or outward (Fig. 5) on the rear curb side rail. Motor orientation
is determined by the way the motor mounting plate (Fig. 4A) is attached. Attach the motor mounting
plate for the desired orientation using the four large countersunk bolts provided.
Fig. 4 Fig. 5
A
2. After attaching the motor mounting plate (Fig. 4A), attach the motor to the bed lift system by sliding
the hex connecting shaft into the motor. Install the two screws to hold the motor plate tight to the
lift rail.
3. Make sure that the drive (lower) trolleys (Fig. 7) are at the same height on both sides of the bed lift.
4. Install connecting shaft by sliding open end of shaft over the hex shaft on the side opposite the motor.
The motor side of the cross-connecting shaft needs to be completely seated against the c-channel over
the sprocket (Fig. 8).
NOTE: If a gap forms due to the timing shaft "walking", the surface area of the sprocket and timing shaft
are reduced and the sprocket will twist because of force of a smaller area.

Rev: 07.03.18 Page 5 CCD-0001541
Fig. 6
D
C
B
A
Fig. 7
Drive Trolley
5. Loosen the set screw (Fig. 6C) in the collar of the connecting shaft where the gold hex shaft protrudes.
6. Draw out the hex shaft and insert it into the motor until the E-clip (Fig. 6D) is seated against the motor.
Make sure the opposite end of the connecting shaft remains seated.
NOTE: It may be necessary to slightly rotate the connecting shaft back and forth to get the shaft to engage
the motor. Side-to-side leveling will be affected by no more than ¼". The ideal setting is having
the non-motor side trolleys ½" higher than the motor side to facilitate the lock-up pins. Small
incremental changes can be made by utilizing the 12 pt. socket ends on the timing shaft.
7. Tighten the set screw.
Fig. 8

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Wiring the System
1. Connect 12V DC and ground from the unit's power supply to the motor's location with 10 AWG
stranded wire.
2. Connect a 12V DC line to the solid white wire of the supplied power pigtail and the ground wire to the
black striped wire of the pigtail (Fig. 9).
3. Run the RJ-11 COMM cable from the bed lift control switch to the control module.
NOTE: When holding the locking tabs toward you (Fig. 10), the wire colors are the same left-to-right.
Chassis Ground
+12V DC
Fig. 9 Fig. 10
4. Plug the power pigtail, COMM cable, PnP motor, PnP brake, the 3-pin upper PnP microswitch and the
2-pin lower PnP microswitch into the PnP control module. See Wiring Diagram (Fig. 14).
5. Secure the control module to the unit using the module's two mounting holes.
6. Use a router or 1 ½" hole saw to create an opening in the wall or cabinet panel where the control
switch is to be mounted.
A. Run the COMM cable through the opening (Fig. 11).
Make sure the printed circuit board is not in contact with any metallic surface or object. Metal-to-
metal contact between the circuit board and any other metallic surface can damage
(short-circuit) the control switch. A short-circuit may cause the bed lift to operate without pressing
the switch, which could cause personal injury or component damage.
A. Plug the COMM cable into the connector on the printed circuit board located on the back of the
control switch (Fig. 12).
Fig. 11
Fig. 12

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7. Place the switch over the hole, and secure it with the screws provided. Make sure the switch is
positioned such that both screws will securely hold the switch in place (Fig. 13).
Fig. 13
Wiring Diagram
Relay Control Module
RVIA wiring requirements restrict the length of exposed motor leads to a maximum of 10". Therefore,
the Relay Control Module must be placed above the motor or on the wall of the vehicle in close enough
proximity to the motor that the 10" motor lead will reach.
Fig. 14
To
Motor
To
Brake
Butt
Connectors
+12V DC
Ground }10 AWG
from power
source
RJ-11 Communication
Cable
To Upper
Limit Switch
To Lower
Limit Switch
RELAY CONTROL MODULE
(Top View)
3-pin 2-pin
Power Pigtail
supplied with Relay
Control Module
NOTE: RJ-11 cable must be straight
through cable — standard
telephone cable will not work.
All outputs are marked on the underside of the module.
A
B

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Testing the System
Trolley Travel
This test requires two people. Each time the micro-limit switch is depressed the drive trolley should stop.
If the trolley fails to stop when the switch is depressed, re-check all electrical connections and 12V DC and
ground wire connections.
1. Press and hold the control switch UP button (Fig. 13A) to make sure that the trolleys (Fig. 7) travel
upward. If the trolleys travel downward, check the orientation of the 12V DC and ground connections
to the power pigtail (Fig. 9) Refer to Wiring Diagram (Fig. 14).
NOTE: The limit switches (microswitches) (Fig. 15A) are located behind the two small Phillips screws
(Figs. 15B) near the top and bottom of the vertical rail below the motor.
Fig. 15
2. While running the system upward, toggle the upper microswitch with a stiff wire or large paper
clip (Fig. 16).
3. Check the lower limit switch in the same manner as in steps 2 and 3 while the trolley travels downward.
4. If the system fails to operate, check all electrical connections.
B
A
Fig. 16

Rev: 07.03.18 Page 9 CCD-0001541
5. Check to make sure that the wires punched down into the microswitch connectors (small red ones)
are tightly secured. If necessary, press wires firmly in-place with a small screwdriver blade (Fig 17) to
ensure that the pins in the connector bite through the insulation on the wire.
Bed Lift Operation
1. Press and hold the bed lift control switch UP button (Fig. 13A) to make the lift go up.
2. Continue to hold the UP button until the limit switches (microswitches) stop the lift's movement.
3. Press and hold the DOWN button (Fig. 13B) until the limit switches stop the lift's movement.
Motor and Brake
If the motor does not operate well in this test mode, the problem may still be unrelated to the motor. If
uncertain of failure, contact LCI customer service before replacing the motor.
See back cover page for LCI customer service contact information.
1. Position the bed(s) well out of the upper and lower limit switches.
Moving parts can cut or crush. Keep clear of moving parts.
2. Remove the motor plug from the control module.
3. Release the brake lever on the end of the motor.
NOTE: If the beds are up, they will drift downward.
4. Briefly jump 12V DC from a known good source to the motor wires.
5. Use care not to contact the limit switches. If the beds move too close to the limit switches, reverse
the wires to reverse the direction of the beds. Run the beds this way only long enough to verify
motor operation.
Fig. 17

Rev: 07.03.18 Page 10 CCD-0001541
Limit Switches - Microswitches
To determine if there is a limit switch problem, eliminate the switch from the circuit.
1. Remove the small red plugs from the PnP control module.
2. Short the connector pins of the module.
A. Lace a paper clip over and under the output pins of the 3-pin connector to create a short (Fig. 18).
NOTE: Alternatively, an alligator clip may be used instead of a paper clip.
B. Wedge a small screw, or other metallic object, between the output pins of the 2-pin connector to
create a short (Fig. 19).
Fig. 18 Fig. 19
3. Briefly depress the UP/DOWN buttons on the control switch to see if the motor energizes.
A. If the motor energizes, then the problem is with the limit switch circuit. Replace the limit switch.
B. If the motor does not energize, then the problem is not in the switch, but elsewhere.
Bed Lift Control Switch - LCI-supplied Switch Only
The PnP bed lift control switch (rocker switch) is plugged into a circuit board which transitions the signal
from the switch to the communication cord. Bypass the switch for testing purposes as follows:
1. Remove the screws from the switch bezel to gain access to the back of the switch.
2. Use a loop of wire to short the switch's center contact to the outer contacts (Fig. 20).
The limit switches are no longer active in the circuit and will not stop the bed. Damage to the switches,
mechanism, or coach could occur. Reversing the wire leads will reverse the motor direction.
Fig. 20
A. Short from center silver lug to each outside lug. One side should move beds up - the other side down.
B. If the bed(s) move while contacts are being shorted, but not when the switch is depressed, the
switch is defective. Replace switch.
3. Install switch bezel to the back of the switch with previously removed screws.

Rev: 07.03.18 Page 11 CCD-0001541
Relocating Limit Switches
If desired, the limit switches can be moved from their factory locations to one of the alternate positions.
To relocate the upper limit switch:
1. Remove the two Phillips head screws (Fig. 15).
2. Move the switch to the new location.
NOTE: It may be necessary to add 6P4C (28 AWG) wire to the microswitches to accommodate switch relocation.
Do not over-tighten screws. Tighten screws slowly until switch is snug and does not move.
Over-tightening screws can crack the limit switch body, causing the limit switch to short-out. If there is a
short, the bed lift travel will not stop, which could cause catastrophic failures to the system.
3. Reinstall screws to secure switch.
Failure to relocate stop screws along with relocated microswitches can cause damage to the bed lift
system. Relocate, or install new, stop screws when relocating microswitches to prevent possible bed
lift damage.
Stop Screws
Fig. 21
To relocate the lower limit switch:
1. Remove the two Phillips head screws (Fig. 15A).
2. Move the switch to the new location.
NOTE: It may be necessary to add 6P4C (28 AWG) wire to the microswitches to accommodate switch relocation.
Do not over-tighten screws. Tighten screws slowly until switch is snug and does not move.
Over-tightening screws can crack the limit switch body, causing the limit switch to short-out. If there is a
short, the bed lift travel will not stop, which could cause catastrophic failures to the system.
3. Reinstall screws to secure switch.
When limit switch microswitches are relocated from their factory locations, #10 x ⁄" self-tapping stop
screws located on either side of the microswitches (Fig. 21) must be moved also.
If the lower limit switch is relocated from its lowest position, stop screws must be installed at the new location.

Rev: 07.03.18 Page 12 CCD-0001541
Manual Operation
Before releasing the brake in manual mode, make sure there are no obstacles below the bed platforms.
Be prepared to apply the brake, if necessary, and make sure to move the brake back into the ON position
once the desired height is reached.
Before manually cranking the bed lift, release the brake and unplug the motor from the PnP control module.
The PnP control module is typically installed above the motor (Fig. 23). It can, however, be installed in a
different location that is in close proximity to the motor.
Fig. 22
Control
Module Brake
Release
Motor
Plug
Manual crank points (Fig. 24) are located opposite the motor and on opposing vertical rails. Crank points
may be covered with a yellow protective cap. Remove caps before starting crank procedure.
Fig. 23
Cranking
Point
Manually Raise the Bed(s)
Do the following in Order:
1. Unplug the motor from the control module (Fig. 23).
2. Release the brake (Fig. 23).
3. Use a ½" ratchet on one of the crank points (Fig. 24) to slowly raise the bed lift.
Use care when manually lifting the bed(s) so the lift does not bind within the rails, resulting in
damage to the bed lift system.
A. Turn the ratchet clockwise to raise the bed(s).
NOTE: Manual operation of the bed lift system is easier with two people cranking on opposing crank points.
B. Apply the brake (Fig. 23) when bed(s) reach the desired height.
C. Plug the motor cable into the control module.

Rev: 07.03.18 Page 13 CCD-0001541
Manually Lower the Bed(s)
Do the following in order:
1. Unplug the motor from the control module (Fig. 23).
2. Release the brake (Fig. 23). Bed(s) will drift downward.
3. Apply the brake when bed(s) reach the desired height.
4. Plug the motor cable into the control module.

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LCI prohibits the copying or dissemination of portions of this manual unless prior written consent from an
authorized LCI representative has been provided. Any unauthorized use shall void any applicable warranty.
The information contained in this manual is subject to change without notice and at the sole discretion of LCI.
Revised editions are available for free download from lci1.com.
Please recycle all obsolete materials.
For all concerns or questions, please contact
Lippert Components, Inc.
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