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www.dumbwaiters.com 

1-800-409-5438

 

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1. 

Anyone planning to use this dumbwaiter should read the Owner’s Manual prior to operating.  If you do not 
have an Owner’s Manual, please visit our website to download a copy or call us to have one sent to you. 

2.  DO NOT allow children to use the dumbwaiter without adult supervision! 

3.  DO NOT operate dumbwaiter if you are under the influence of any drugs, alcohol or medication 

that could affect your ability to use the dumbwaiter properly. 

4.  NEVER OPERATE DUMBWAITER if door safety switches are not working properly.

  Every 

dumbwaiter includes door safety switches, which prevent the dumbwaiter from operating if any door is not 
properly closed.  The switches will also stop the dumbwaiter if any door is opened while the dumbwaiter is 
in operation.  If your door safety switches are not working properly, immediately unplug the dumbwaiter 
and call Powerlift Dumbwaiters, Inc. to request replacement door safety switches, free of charge for the 
life of the dumbwaiter.  Ensure that the switches are replaced by a qualified technician. 

5.  NEVER OPERATE DUMBWAITER if door locks are not working properly.

  Every dumbwaiter includes 

door locks, which prevent the doors from being opened while the dumbwaiter is in operation.  If your door 
locks are not working properly, immediately unplug the dumbwaiter and call Powerlift Dumbwaiters, Inc. to 
request replacement door locks.  Ensure that the door locks are replaced by a qualified technician. 

6.  NEVER USE THE DUMBWAITER if it is not operating properly.

  Call your service technician, 

installation contractor, or Powerlift Dumbwaiters, Inc. 

7.  NEVER USE THE DUMBWAITER when smoke and/or fire is present. 

8.  DO NOT REMOVE, BYPASS, OR ALTER any switches, controls, and/or restraining devices.

  These 

are mandated by national and local codes and safety regulations.  Any tampering will void your warranty 
and could result in serious injury and/or death.

 

9.  NEVER EXTEND YOUR HANDS, ARMS, LEGS, FEET, HEAD, OR BODY INTO OPEN HOISTWAY!  

Doing so could cause serious injury and/or death!  Never extend foreign objects of any kind into open 
hoistway.  Doing so can cause damage to your dumbwaiter and/or serious injury to you!

 

10.  NO RIDING IN DUMBWAITER CAR!

  Your dumbwaiter car is not intended to transport people and/or 

animals.  Doing so could cause serious injury and/or death!

 

11.  NEVER OVERLOAD YOUR DUMBWAITER CAR!

  Your dumbwaiter is rated for a certain capacity.  

Please see data plate in car.

 

12. 

Your dumbwaiter is not designed for continuous operation.  Too many “starts” and “stops” could overheat 
the motor and trip the breaker.

 

13. 

The dumbwaiter should be on a dedicated circuit.  Too many appliances operating from the same power 
source reduces the available amperage and may cause the dumbwaiter to malfunction.  If your 
dumbwaiter does not seem to be operating at its optimum, stop using it until it can be inspected by a 
qualified technician. 

14. 

To prevent unauthorized use, a keyed on/off switch can be obtained from Powerlift Dumbwaiters, Inc. 

15. 

Observe, read, and obey the warning labels, tags, and symbols, as they are provided by the manufacturer 
for your safety and protection. 

16.  DO NOT ATTEMPT TO REPAIR the dumbwaiter yourself.

  Immediately stop use, disconnect power 

supply and call Powerlift Dumbwaiters, Inc. to determine whether you need to contact your service 
technician or installation contractor. 

17. 

Check your local fire code.

  Swing Hoistway doors may be required to be fire rated and have self 

closing hinges.

 

 

Important Information You Should Know

 

Please Read 

 

Summary of Contents for MJ-500

Page 1: ...injury or death 2018 08 08 12 07 17 www dumbwaiters com All persons who use this dumbwaiter bear the responsibility for the proper and safe use of this product Misuse deliberate or otherwise voids al...

Page 2: ...www dumbwaiters com 1 800 409 5438 Page 2...

Page 3: ...t hesitate to contact us on our toll free number in the USA or 1 530 333 1953 for international customers We offer free technical support for your dumbwaiter and our staff will be happy to help you Th...

Page 4: ...sting Chain Tension motor on the top Lubricating Brake Solenoid P 100 P 200 Lubricating Brake Solenoid P 300 MJ 500 Troubleshooting Wiring Diagram 2 stop single phase Wiring Diagram 2 stop three phase...

Page 5: ...fire is present 8 DO NOT REMOVE BYPASS OR ALTER any switches controls and or restraining devices These are mandated by national and local codes and safety regulations Any tampering will void your warr...

Page 6: ...door lock catch 4 Hoistway door 5 Dumbwaiter car 6 Data plate 7 Call send push buttons 8 Motor controller 9 Power supply 10 Brake solenoid cover 11 Motor access door panel Identifying Parts of the Dum...

Page 7: ...solenoid cover 5 Motor access door panel 6 Call send push buttons 7 RDI door interlock 8 RDI door interlock catch 9 Hole to access emergency override switch 10 Data plate 11 Dumbwaiter car 12 Hoistwa...

Page 8: ...pletely closed the dumbwaiter will not operate 5 Press the call send button that corresponds with the floor you want to send the dumbwaiter car to 6 Once the dumbwaiter car stops at the specified floo...

Page 9: ...hs Lubricating the idler pulley Place a few drops of lightweight oil on the shaft next to the pulley on each side see Figure 5 Lubricating the pillow block assembly Using a grease gun apply a few pump...

Page 10: ...se pliers to hold the chain from twisting and tighten lock nut up to adjustment nut securely see Figure 8 NOTE Do not overtighten the chain If the chain slaps during operation of the dumbwaiter the ch...

Page 11: ...U OLQN SODWH DQG SLQ DVVHPEO 3XVK WKH PDVWHU OLQN SODWH DQG SLQ DVVHPEO WKURXJK ERWK HQGV RI WKH UROOHU FKDLQ QVWDOO WKH PDVWHU OLQN SODWH DQG SLQ DVVHPEO VR WKH JURRYHG HQGV RI WKH SLQV IDFH RXWZDUG...

Page 12: ...master link plate and pin assembly through both ends of the roller chain Install the master link plate and pin assembly so the grooved ends of the pins face outward Install the master link plate The m...

Page 13: ...ar down until the top of the car is lined up with the bottom of the top hoistway door see Figures 10 11 13 6 Using two 9 16 wrenches 15 16 for MJ 500 model back lock nut off and then tighten down adju...

Page 14: ...BRICATE HERE AND ON OPPOSITE SIDE WITH LIGHT LUBRICANT BRAKE DRUM BRAKE PAD BRAKE SHOE SOLENOID COVER SCREWS SOLENOID REMOVE SOLENOID COVER FOR EASY ACCESS TO BRAKE SOLENOID Maintenance Lubricating Br...

Page 15: ...e Lubricating Brake Solenoid P 300 MJ 500 YOU MUST ACCESS THE BRAKE SOLENOID THROUGH THE MOTOR ACCESS PANEL DOOR FAILURE TO DO SO COULD DAMAGE THE DUMBWAITER AND OR CAUSE SERIOUS BODILY INJURY LOSS OF...

Page 16: ...ng dumbwaiter car A Verify all doors are closed and dumbwaiter car is not lower than the bottom floor opening or higher than the top floor opening I If dumbwaiter car is not vertically out of alignmen...

Page 17: ...www dumbwaiters com 1 800 409 5438 Page 15 Troubleshooting Controller Wiring Diagram 2 Stop Single Phase...

Page 18: ...www dumbwaiters com 1 800 409 5438 Page 16 Troubleshooting Controller Wiring Diagram 2 Stop Three Phase...

Page 19: ...www dumbwaiters com 1 800 409 5438 Page 17 Troubleshooting Dynamic Brake Wiring Diagram Single Phase...

Page 20: ...www dumbwaiters com 1 800 409 5438 Page 18 Troubleshooting Dynamic Brake Wiring Diagram Three Phase...

Page 21: ...www dumbwaiters com 1 800 409 5438 Page 19 Troubleshooting Controller Wiring Diagram 3 Stop Single Phase...

Page 22: ...www dumbwaiters com 1 800 409 5438 Page 20 Troubleshooting Controller Wiring Diagram 3 Stop Three Phase...

Page 23: ...www dumbwaiters com 1 800 409 5438 Page 21 Troubleshooting Controller Wiring Diagram 4 Stop Single Phase...

Page 24: ...www dumbwaiters com 1 800 409 5438 Page 22 Troubleshooting Controller Wiring Diagram 4 Stop Three Phase...

Page 25: ...www dumbwaiters com 1 800 409 5438 Page 23 From all of us at Powerlift Dumbwaiters Inc Thank you for your business May God bless you and your family...

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