Technical data

COMMISSIONING
30
The modes are:
Flashes
Operational Modes
solid green
(remains on)
Standby mode – water is hot
1 x green
Call for heating received – system checks performed
Note: unit may wait and continue flashing until compressor has
cooled from its last operation
2 x green
Circulator commences circulation
3 x green
Heat pump operation – compressor and fan running
long green
Heating unit on – ambient air temperature
below 3°C to 5°C or above 45°C to 55°C
no green
(remains off)
No power at the water heater or to the heat pump
or a possible fault condition
Refer to notes below before calling for service
Flashes
Fault Modes
1 x red
Heating unit on compressor over temperature
(possible circulator fault)
2 x red
Heating unit off compressor fault condition
3 x red
Heating unit on compressor cooling fault condition
4 x red
Heating unit on tank thermistor fault condition
5 x red
Heating unit on evaporator thermistor fault condition
6 x red
Heating unit on compressor thermistor fault condition
9 x red
Heating unit on compressor fault condition
Notes:
Power must be available at the water heater and to the heat pump for
the LEDs to glow or flash.
There are no 7 or 8 x red flash fault mode codes.
When power is turned on or reconnected to the water heater, the red LED
will emit a solid glow for three (3) seconds and then extinguish. This is
normal operation and does not indicate a fault. The LED display will then
return to the current operational status.
If there is power to the water heater and the green LED is off or the red
LED is flashing, this indicates there may be a fault condition with the water
heater. The red LED may emit up to nine flashes in each series of flashes.
Refer to “Possible fault condition” on page 31.