Bed-Lift User Manual
Contents
1. Address www happijac com bed liftmanual1 10304 CHAIN DRIVE BED LIFT USERS MANUAL HAPPIJAC Product Usage This product is designed and intended ONLY to be used as a Bed Lift mechanism Any other use of this system will void any and all written or expressed warranties and indemnify Happijac Company from any harm which may occur as a result of any other use or misuse of this product Operating Precautions CHECK to be sure the locking pins are securely fastened in all 4 attaching points on the bed platform before towing the trailer or using the bed s ALWAYS Raise the bed s to the FULL UP position when the trailer is being towed TO AVOID DAMAGING THE BED S NEVER Operate the bed s with any items other than bedding on the bed platform NEVER Travel with any items other than bedding on the beds NEVER Operate the bed s when persons are on the bed platform NEVER Hang from or hang more than 20 pounds from the cross connecting shaft ALWAYS Ensure that the areas above below and adjacent to the bed s are free from obstructions before operating the bed s ALWAYS Check before operating the bed s to ensure bedding is not over hanging the ends of the bed s where it could become entrapped ALWAYS Exercise care when loading cargo vehicles in the bed area to avoid damaging the bed mechanism ALWAYS Properly secure loads in the bed area to avoid damaging the bed mechanism from shifting or falling2. loads Operation Instructions The bed s is are operated from the control switch Pressing and holding the switch in the UP position moves the bed s upward Pressing and holding the switch in the DOWN position moves the bed s downward Limit switches are used to stop the bed s at their a maximum travel range However the bed s can be stopped and used at any desired height Once the control switch is released the brake sets securing the bed s in that position User configuration options The following user configuration options are possible Trolley Tab Settings The Trolley Tabs are the angular pieces which support the bed platform These can be adjusted upward downward or flipped 180 degrees The purpose for this adjustment option is to provide greater flexibility in configuring the system for users specific needs Examples would include Creating more headroom when the beds are up or creating more spacing between the beds in a bunk bed 2 bed system See the following illustrations Examples of optional Trolley Tab configurations J I ji 1 l P K F a a 5 d B ad Single bed units can be easily upgraded to bunk bed 2 bed units by installing the trolley tabs to the existing second trolley and adding a bed platform and mattress bed liftmanual1 10304 Problem Bed will go down but will not go up START While pressing switch in the up position does Unplug the
3. upper limit switch then using a paper clip or wire jumper short the two wires together which would normally plug into the limit switch wires Briefly press the switch to the up position the bed make any attempt to go up Yes Did the bed move up Problem Solved Yes No Replace defective limit switch Make certain coach batteries are adequately charged and if possible plug into AC Power or engage generator Contact Happijac Company Technical Support 1 800 231 7440 Problem Bed will go up but will not go down START Unplug the upper limit switch then using a paper clip or wire jumper short the two wires together which would normally plug into the limit switch wires Briefly press the switch to down position Did the bed move down Yes No Replace Remove plate where motor wires defective are attached and briefly jumper limit switch between the terminals marked DOWN amp SW CMMON on relay board Did bed move down Yes No The problem is with either the UP DN switch or the Contact Happijac Company wiring between the switch Technical Support and the relay board 1 800 231 7440 bed liftmanual1 10304 Bunk Stop Settings Upper trolley stop The upper bunk trolley is free floating and is carried by the lower trolley The height at which this trolley stops is set by stop blocks which sit inside the trolley rails To change this stop remove the 2 screws
4. which hold it in place and move it to the desired height All 4 corners Stowing The Top Bunk 2 BED CONFIGURATION The bed lift system has a stow feature for the top bunk which leaves it in the travel position at the ceiling while allowing the lower bunk to be set at a usable height To Stow 1 Run the beds to the FULL UP stop 2 Insert the locking pins through the trolley rails as shown in the photo below 3 Lower bottom bunk to desired height NOTE The bunk platforms removed for photo clarity only Platform removal not necessary to stow To Release From Stow Position 1 Run the beds to the FULL UP stop 2 Remove the locking pins 3 Lower both bunks until the top bunk rests on the bunk stop and the lower bunk is at desired height Maintenance The HAPPIJAC Bed Lift system requires very little maintenance The chains are pre lubricated and nickel plated to prevent corrosion All bearings are sealed and all parts are either plated or finished with a durable powder coat finish The only required maintenance involves keeping the mechanism clean and free of debris When cleaning the trailer after use inspect the vertical trolley channels for dirt or debris and clean as necessary After cleaning a light application of silicone spray on the inner sides of the trolley channels will improve performance and reduce noise and amperage draw Silicone spray can be purchased at hardware amp auto parts stores Look spec
5. Motor amp Brake Test The motor and brake assembly is best tested by jumpering 12 14 vdc directly to the motor This is done as follows 1 2 S Position the bed well out of the upper amp lower limit switches Remove the cover plate from the wall or ceiling where the motor wires are attached This will reveal a small circult board on which is a terminal block into which the motor leads are connected Unscrew the terminals securing the motor leads Jumper the motor leads directly to a good 12 14 vdc supply This can be a full size battery or simply a well charged battery from a cordless drill etc Run the bed only long enough to check performance CAUTION Do not run the bed into the limit switches They are no longer active in the circuit and will not stop the bed Damage to the switches mechanism or coach could occur Reversing the leads will reverse the motor direction If the bed does not operate will in this test mode the problem may still be unrelated to the motor Motor failures are extremely rare Before replacing the motor contact Happijac technical support at 1 800 231 7440 stem Specifications Voltage 12 VDC Nominal current draw 8 amps 1 bed going up 12 amps 2 beds going up Load limit 450 pounds dynamic moving load 600 pounds static stationary load HAPPIJAC 505 North Kays Drive Kaysville UT 84037 Phone 801 544 2585 Fax 801 546 5241 Email happijac happijac com Web
6. e pressing switch can a clicking sound be heard beneath the wall plate where the motor leads enter the coach w Yes Remove wall plate Check for 12 vdc between Terminals marked Bat Is reading gt 12 vdc w Yes From a known good source such as acordless drill battery shop battery etc momentarily jumper 12 vdc to the screw posts on the terminal block marked M1 amp M2 Caution Connect just long enough to see if motor engages DO NOT run bed into the limit switches as these will not be active in the circuit to stop the bed The switches will be damaged Did the motor energize Problem Solved breaker fuse Check in line if installed Problem Solved END There is a power problem external to the bed lift system Consult your dealer or coach manufacturer Replace Motor Problem Solved Contact Happijac Company Technical Support 1 800 231 7440
7. ifically for the brands which provide a small spray tube This makes application much easier Troubleshooting amp Repair Symptom Bed will not move either up or down when switch is pressed See diagnostic flow chart page 5 Bed will go one direction but does nothing when switch is pressed for the other direction See diagnostic flow charts pages 6 amp 7 Bed operates going down but stops part way going up Bed will not stay level side to side or front to back Bed fails to stop at the preset stop point when coming down Bed fails to stop at the preset stop point when going up Upper bunk 2 bed system Does not come down smoothly bed liftmanual1 10304 Possible Cause 1 No or insufficient power to operate bed 2 Faulty relay board 3 Faulty switch 4 Defective motor 1 2 3 Defective limit switch Faulty relay board Faulty key switch 1 Insufficient power to bed 2 Defective motor brake assenbly See test on page 8 o_o Broken timing shaft 2 Broken chain sprocket Motor brake is not engaging See test on page 8 2 Defective limit switch o_o Defective or damaged limit switch 1 Sticky bed carrier Spray a small amount of silicone lubricant up both inner sides of all 4 rails See maintenance section Replace Relay Board yes Troubleshooting Flow Chart Problem Bed will not move either up or down when switch is pressed START Whil
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