Jaay757
Member
- Jun 18, 2012
- 141
- Boat Info
- 2006 sea ray 340 sundancer (sold)
- Engines
- 8.1's, ZF IV V drives
I just would like to pass on this info if anyone is having similar problems!!
I have a 06 sea ray 340 with a coolmatic RPD-0110U in the downstairs galley. The fridge would cool great and work as it should under shore power. However On 12Volts the fridge would not get cold. You could here the fan running and it sounded like the compressor was running but not cold. I figured it was time to get to the bottom of this problem as I could not use my cockpit beer fridge and cooler for food any more while on the hook. I contacted Dometic who now owns coolmatic. This was the response I received:
The only difference in running it on AC power vs DC power is the power source (110 vs 12vdc) and the power supply. What you can do, is bypass the power supply, and run your DC power directly to the Danfoss module. If the compressor does not run then, then it is a voltage problem in the boat, and you'll have to trace the wiring to find where the voltage drop is occuring. If it does run, you'll have to replace the power supply.
Customer Service Technician
So I did the above and found the fridge to cool great when directly wired into the 12V source for the power supply. so great, I ordered a new power supply. This fridge had an Waeco/Mobitronic MPS-35. I received the new power supply hooked it up and again fridge would not cool. compressor would try to start for approx 5-10 seconds and shut off. The fan runs great. I disconnected the power supply and hard wired the fridge again and no problem runs great.
So I contacted Dometic again and they sent me a bigger power supply MPS-50. Hooked it up to the fridge and whoola fridge has been running on 12v and cold as ever now for 2 days.
It appears that the MPS-35 power supply with an output of 2 amps is inadequate to run this fridge compressor on 12V. The MPS-50 with a higher output seems to do the job.
I have a friend with the same year boat and model fridge that has the same problem, so this is evidently an issue.
I have a 06 sea ray 340 with a coolmatic RPD-0110U in the downstairs galley. The fridge would cool great and work as it should under shore power. However On 12Volts the fridge would not get cold. You could here the fan running and it sounded like the compressor was running but not cold. I figured it was time to get to the bottom of this problem as I could not use my cockpit beer fridge and cooler for food any more while on the hook. I contacted Dometic who now owns coolmatic. This was the response I received:
The only difference in running it on AC power vs DC power is the power source (110 vs 12vdc) and the power supply. What you can do, is bypass the power supply, and run your DC power directly to the Danfoss module. If the compressor does not run then, then it is a voltage problem in the boat, and you'll have to trace the wiring to find where the voltage drop is occuring. If it does run, you'll have to replace the power supply.
Customer Service Technician
So I did the above and found the fridge to cool great when directly wired into the 12V source for the power supply. so great, I ordered a new power supply. This fridge had an Waeco/Mobitronic MPS-35. I received the new power supply hooked it up and again fridge would not cool. compressor would try to start for approx 5-10 seconds and shut off. The fan runs great. I disconnected the power supply and hard wired the fridge again and no problem runs great.
So I contacted Dometic again and they sent me a bigger power supply MPS-50. Hooked it up to the fridge and whoola fridge has been running on 12v and cold as ever now for 2 days.
It appears that the MPS-35 power supply with an output of 2 amps is inadequate to run this fridge compressor on 12V. The MPS-50 with a higher output seems to do the job.
I have a friend with the same year boat and model fridge that has the same problem, so this is evidently an issue.