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DIAGNOSTIC FEATURES OF THE SOLAR CONTROLLER
The solar storage tank incorporates an electronic solar control module. This is located inside of the
lower front cover and houses both a green and a red LED. The LEDs emit either a constant glow or a
series of flashes with a 2 second interval between flashes. The green LED indicates the current
operational mode of the solar water heater and the red LED indicates a fault mode. To view the status
of the LEDs, it is necessary to remove the lower front cover.
Warning: The removal of the lower front cover will expose 240 V wiring. It must only be removed by
an authorised or service person.
The modes are:
Flashes Operational Modes
Solid green
(remains on)
Standby mode
1 x green Flooding solar circuit
2 x green Checking solar contribution
3 x green Pump flow control
4 x green Pump flow established
5 x green Tank at maximum temperature
Flashes Fault Modes
1 x red Hot sensor in collector – open circuit
2 x red Hot sensor in collector – short circuit
3 x red Cold sensor – open or short circuit
4 x red Top three tank thermistors – open or short circuit