Heat Pump problems
We have a Duo-Therm 60515 heat pump (13,500 BTU) that recently went out of commission on our mh and are evaluating our options. We have a 2007 Newmar with dual heat pumps on the roof plus a furnace b...
Forum Discussion
I am sure I wired it up per the directions (but have done dumb things in the past) so to be sure I went back and checked. I pulled it apart and noted everything checked out. I then reconnected it all back together carefully. The only thing I discovered was that I had not set one of the dip switches to include the furnace. But bottom line is with the 5 button CCC in the OFF position and shore power plugged in, the reversing valve solenoid is energized. If I connect and disconnect the violet solenoid wire, I can hear a solid click and I can feel something if I put my finger on the solenoid so it definitely is energized in the CCC OFF position. Please excuse the length of this as I am trying to accurately describe what I have done. I do not know how to display photos here but can temporarily display them here: http://www.smtlm.org/heatpump.html
Just to be clear, this is a Penquin II high capacity heat pump with conversion module PCB (3313107.107 kit) to operate with existing 5 button CCC. Also have a zone 2 heat pump and a furnace. Going on a 2007 Newmar Ventana after original zone 1 heat pump went bad.
I followed the Service Instructions that came with the conversion kit (form #3314520.010)
There were no instructions that came with the heat pump but wiring was pretty much straight forward. The 120 (hot, common and ground) was simple. The 12VDC and ground matched up. There were two furnace wires and it did not seem to make any difference how they matched up to the two MH furnace wires. Ditto with the two four wire cable phone type connectors. The only wires not used were two yellow wires from the heat pump that came from the 6 pin connector (LOAD SHED). Nothing from the MH side to connect to.
I again reset the CCC. I then put it into the cooling mode. The solenoid was energized while the fan blew for 2.5 minutes, at which time the solenoid disengaged, then the compressor started up and cool air ensued.
I then set the CCC to heat pump (the solenoid then energized) and the fan blew for 2.5 minutes at which time the compressor started up and hot air ensued. If I disconnected the solenoid the reversing valve would click and the compressor would stop.
So if I am on shore power, the default is to have the solenoid energized and reversing valve is in the heating position.
If not on shore power, then the solenoid is not energized and the reversing valve is in the cooling position.
I did contact Dometic regarding the solenoid being energized with shore power and CCC in the OFF position. Also said I read 120 VAC at the board terminal marked Violet. Their email reply was:
=======================
David
Just because you have volts does not mean the circuit is active.
Attached is a service bulletin on the 5 button system.
We appreciate this opportunity to address your situation, and hope all your future travels are trouble free. Please do not hesitate to contact us any time, to order parts or if we can be of assistance.
=======================
I then got another reply by someone else at Dometic.
=======================
Dear David ,
When plugged in the AC/HP will experience what we call Phantom voltage ( which is you will have voltage on all circuits -( ie..fan , hi-lo) , this is normal . The reversing valve is energized in the heat mode not cool mode like the older units .
Thank you for contacting Dometic
Sincerely
Dometic Customer Support
=======================
Neither addressed if having the solenoid energized while on shore power and CCC OFF is normal. I will ask again. Just does not make sense to me to have the solenoid energized while CCC is OFF.
Just to be clear, this is a Penquin II high capacity heat pump with conversion module PCB (3313107.107 kit) to operate with existing 5 button CCC. Also have a zone 2 heat pump and a furnace. Going on a 2007 Newmar Ventana after original zone 1 heat pump went bad.
I followed the Service Instructions that came with the conversion kit (form #3314520.010)
There were no instructions that came with the heat pump but wiring was pretty much straight forward. The 120 (hot, common and ground) was simple. The 12VDC and ground matched up. There were two furnace wires and it did not seem to make any difference how they matched up to the two MH furnace wires. Ditto with the two four wire cable phone type connectors. The only wires not used were two yellow wires from the heat pump that came from the 6 pin connector (LOAD SHED). Nothing from the MH side to connect to.
I again reset the CCC. I then put it into the cooling mode. The solenoid was energized while the fan blew for 2.5 minutes, at which time the solenoid disengaged, then the compressor started up and cool air ensued.
I then set the CCC to heat pump (the solenoid then energized) and the fan blew for 2.5 minutes at which time the compressor started up and hot air ensued. If I disconnected the solenoid the reversing valve would click and the compressor would stop.
So if I am on shore power, the default is to have the solenoid energized and reversing valve is in the heating position.
If not on shore power, then the solenoid is not energized and the reversing valve is in the cooling position.
I did contact Dometic regarding the solenoid being energized with shore power and CCC in the OFF position. Also said I read 120 VAC at the board terminal marked Violet. Their email reply was:
=======================
David
Just because you have volts does not mean the circuit is active.
Attached is a service bulletin on the 5 button system.
We appreciate this opportunity to address your situation, and hope all your future travels are trouble free. Please do not hesitate to contact us any time, to order parts or if we can be of assistance.
=======================
I then got another reply by someone else at Dometic.
=======================
Dear David ,
When plugged in the AC/HP will experience what we call Phantom voltage ( which is you will have voltage on all circuits -( ie..fan , hi-lo) , this is normal . The reversing valve is energized in the heat mode not cool mode like the older units .
Thank you for contacting Dometic
Sincerely
Dometic Customer Support
=======================
Neither addressed if having the solenoid energized while on shore power and CCC OFF is normal. I will ask again. Just does not make sense to me to have the solenoid energized while CCC is OFF.
