26
8. Faults and protection
Digital
indication
Whether to start
electric heater
Compressor protection
Operating temperature protection
Air exhaust temperature protection
Evaporation high temperature
protection
Compressor over-current
protection
Over-current protection
Electricity leakage alarming
The system will automatically cut off
power supply if any line fault occurs
E1
Over temperature alarming
The actual water temperature≥85℃
E2
Fault of the inner
temperature sensor
If short circuit or circuit break occurs
to the sensor
E3
Fault of the ambient
temperature sensor
If short circuit or circuit break occurs
to the sensor
E4
Fault of the evaporation 1
temperature sensor
If short circuit or circuit break occurs
to the sensor
E5
Fault of the air exhaust
temperature sensor
If short circuit or circuit break occurs
to the sensor
E6
Fault of the evaporation 2
temperature sensor
If short circuit or circuit break occurs
to the sensor
ED
Communication fault
Communication of main control panel
and display panel is abnormal
E7
Pressure switch protection
Action of the pressure switch at the
exhaust outlet
E8
Ambient temperature
protection
Ambient or outdoor temperature
<-7℃ or>37℃
E9
F2
F3
F5
F6
Fault type
Action
Evaporation low temperature
protection
F7
Fault of the Solar or boiler
temperature sensor
If short circuit or circuit break occurs
to the sensor （for HP250CM2）
EE
Fault of the Off-peak power
switching signal
If not received the Off-peak signal
when selecting switch signals by
power companies
EF
Automatically start
electric heater
Three times or more,
you need to manually
start BOOST
Can't start electric
heater
Need to manually
start BOOST
Need to manually
start BOOST
Can't start electric
heater
Automatically start
electric heater
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