JBG HT ZHHS-01-10K-R290-V5-M, Service Manual

Page: 13 / 32

© JBG-HT (v.2.0)
13
SERVICE MANUAL – HEAT PUMP
When you press Info, you can see the operating
statuses of the devices. The meanings of each abbre-
viation are explained in the attached table.
U1 Discharge temperature B1
Input temperature to the
exchanger of the unit
U2 External temperature B2 DHW tank temperature
U3 Suction temperature B3 CH buffer temperature
U4 Suction pressure B4 Secondary external temperature
U5 Discharge pressure B5 Heating circuit 2 temperature
U6
Outlet temperature from the
exchanger to the unit
B6 Secondary probe
U7 Crankcase temperature DI1 Heater thermistor breakout sensor
U8 Water flow sensor Y1 Three way valve of heating circuit 2
U9 PWM control of circulation pump Y3
Pump speed regulation
of heating circuit 2
U10 Fan regulation NO1 Three-way valve NO DHW
NO1 Four way valve NO2 Three-way valve NC DHW
NO5 Crankcase heater NO3 DHW circulation pump
NO6 Tray heater NO4 CWU tank heater
NO5 Plant heater
NO6 Heating circuit 1 pump