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
More on the saga.
Dometic contacted us and gave us the wiring diagram for the heat pump when used with the 5 button CCC. Turns out to be the same diagram as what was in our old unit. And sure enough both the old unit board and the new conversion kit board have the same numbers on it. Could have saved $100 except that I got the instructions. However the diagram Dometic sent showed the reversing valve wire connected to terminal T2 (like on my old unit) rather than T4 like the kit directions gave us. Sure enough, the solenoid was no longer energized with CCC in OFF position . . . but the unit heated when set at cool and cooled when set at heat.
So on the off chance our new board was defective, I took the told board out of the old unit and put in in the new unit. Worked the same.
I have another inquiry to Dometic regarding the energizing of the solenoid at rest. They keep skirting that question. They do say there is phantom power in the system as has been for all their units for years. My zone 2 heat pump does not have the solenoid energized at rest. And there should be a difference between phantom power and the solenoid being fully energized. Dometic said the phantom power actually saves on the equipment but in order to cool, the solenoid had to be deactivated so what is that logic?
Dometic contacted us and gave us the wiring diagram for the heat pump when used with the 5 button CCC. Turns out to be the same diagram as what was in our old unit. And sure enough both the old unit board and the new conversion kit board have the same numbers on it. Could have saved $100 except that I got the instructions. However the diagram Dometic sent showed the reversing valve wire connected to terminal T2 (like on my old unit) rather than T4 like the kit directions gave us. Sure enough, the solenoid was no longer energized with CCC in OFF position . . . but the unit heated when set at cool and cooled when set at heat.
So on the off chance our new board was defective, I took the told board out of the old unit and put in in the new unit. Worked the same.
I have another inquiry to Dometic regarding the energizing of the solenoid at rest. They keep skirting that question. They do say there is phantom power in the system as has been for all their units for years. My zone 2 heat pump does not have the solenoid energized at rest. And there should be a difference between phantom power and the solenoid being fully energized. Dometic said the phantom power actually saves on the equipment but in order to cool, the solenoid had to be deactivated so what is that logic?
