Hi,
Looking for some help please for my new Japanese hydronic heat pump which keeps throwing up an E002 message, which in the booklet says “supply water side thermistor overheating”. Solutions in the manual are “check leakage of the system water, the blockage. If no problem, exchange control of the PCB or replace whole unit” (that is the translation from Japanese to English)
Could someone please explain what it means and how I could fix it? For info the heat pump is used in the Japanese domestic market and parts of N America (I’m using it in southern Australia) and I’m using it on the low pump speed 8KWh mode to produce a maximum output water temp of 70C which is considered hot for hydronic heat pumps. Inlet (supply?) water is about 30-40C after it has been through the radiators in the house and back out through the buffer tank to cool the water as much as possible and create a high delta T for efficiency.
Any help would be much appreciated - I’m a complete novice so go easy. I can get most info relating to the system including current it draws, system PSI, and inlet/outlet water temps.
Thanks
Looking for some help please for my new Japanese hydronic heat pump which keeps throwing up an E002 message, which in the booklet says “supply water side thermistor overheating”. Solutions in the manual are “check leakage of the system water, the blockage. If no problem, exchange control of the PCB or replace whole unit” (that is the translation from Japanese to English)
Could someone please explain what it means and how I could fix it? For info the heat pump is used in the Japanese domestic market and parts of N America (I’m using it in southern Australia) and I’m using it on the low pump speed 8KWh mode to produce a maximum output water temp of 70C which is considered hot for hydronic heat pumps. Inlet (supply?) water is about 30-40C after it has been through the radiators in the house and back out through the buffer tank to cool the water as much as possible and create a high delta T for efficiency.
Any help would be much appreciated - I’m a complete novice so go easy. I can get most info relating to the system including current it draws, system PSI, and inlet/outlet water temps.
Thanks
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