Hello every one!
I have a Sanyo co2 heat pump and matching thermal tank
It stopped working a year ago with the fault reading ‘comm error’
Have changed the PCB in the tank unit and one in the outdoor unit with no success.
Am trying to find someone to come and have a look but no one seems to keen to come
Any help..?
When you replaced the 2 PCBs did you also change the cabling between the 2 devices - A 'comm error' could just be a cable fault, which may include the loss of a common ground or neutral between the units.