Medwrench support - this a safety cabinet (or hood), not a warming cabinet.

Hello to All,

We have this Kendro unit (made in 2003). First the door did not move with the remote control but worked with the mechanical "pilot switch". After a while it did not want to move much with the "pilot switch" either: upon switching the door moved only a few inches and stopped. So the "pilot switch" had to be pushed several times to move the door up and down completely. Now, the door does not even move  with the "pilot switch". 

I have checked the DC motor of the door, it uses about 800mA at 36Volt. It seems OK. The door seems to move without any noise so the mechanism seems OK. too.

The PSU that gives the 48V seems to be working, I put a 500mA load to the output the 48V and it was stable.

There are two boxes, one for the 48V and one for the other Voltages. The 48V is going through that bigger PCB.

Does anyone have a hint what to check on the PCB? I was not able to find any faulty component, and the 48V is not going down to the "pilot switch" or the motor.

I would like to get a wiring diagram for the PCBs. (The service manual is not dealing with any of the PCBs.)

Is there a manual where all the switches of the door are listed with their right ON/OFF states? (It is possible that one of the switvhes of the door is faulty or someone moved it accidentally so it is just not in the right state now.)

I appreciate any help...

Thanks,

Aron

Equipment: Kendro HERAsafe KS/KSP