Troubleshooting Cold Machine

[Victor Robert]

Thanks for your input on my last post. I checked the compressor windings' resistance, which was in the specified range and installed a new AB3016 electronic module. The problem persists. Every 20 seconds the DC current draw jumps by about 7 amps for two seconds, producing a high pitched whine, the fan stops, but the compressor does not start. This is the refrigerator unit. The identical freezer unit runs for a few hours and then goes into this same mode. They both started experiencing problems a few weeks apart.These are original model DCM 12L Cold Machines on a 1991 P42.Supply voltage is 13.0v at the control module terminals, and drops to 12.8 when the compressor attempts to start. Resistance between the bottom and top pins on the compressor is 3.6 ohms. Between the bottom and side pins its 0.3 ohms. I attached the new control module remote to the compressor unit and determined that the high pitched whine is coming from the compressor case, not the electronic module.Any further suggestions ?

 

[Gary Buttrey]

Which module?

Robert, which module did you purchase? Our AB3016 or a Danfoss?

 

[Victor Robert]

AB3016

Gary,The AB3016 was shipped direct from Adler Barbour

 

[frank tompa]

cold machine

Anyone needing used Cold Machine used parts ? The compressor is shot ,R12 .I bought a new unit.Thanks

 

[Victor Robert]

Still waiting for a response

Please note that the previous reply is not from the autor of this thread. I would appreciate any assistance in troubleshooting this problem.Thanks

 

[Ron]

You Could try This

Victor... I am studying A/C and Refrigeration at the local college and although I'm in no position to recommend anything (at this point)I suggest you find the a class nearest you and take your unit in. They are always looking for something to help train the students. I took mine in and two instructors were on it immediately. Whatever you do, don't give up. If worse comes to worse you can hold on to it until I become more dangerous and then maybe I can help.... Ron/KA5HZV

 

[Barry]

troubleshooting

Victor,Check for a voltage drop at the control module when the compressor tries to start.This is important because you may be reading full battery voltage at the panel or the control module, but on start up any fault in the wiring will show up as a voltage drop at the module and the compressor will abort. If there is no drop, I would suspect the module, being an electronic device, it is possible that it is "bad out of the box".Before condemning it, however, you should send it back to AB to verify fault.If you do need a new module you can pick one up for about $200.00. Pretty inexpensive when compared to the cost of a new system.