COMMISSIONING
52
DIAGNOSTIC FEATURES OF THE SOLAR CONTROLLER
The solar storage tank incorporates a solar monitor which is connected to the solar control module by a ribbon
cable. The solar monitor is located on the lower front cover and houses both a green and a red LED.
The green LED, marked “Solar”, indicates the current
operational mode of the solar water heater and the red LED,
marked “Attention”, indicates a fault mode.
The green LED will emit either a constant glow or a series of
flashes, with a 2 second interval between each series.
The red LED will emit a series of flashes, with a 2 second
interval between each series, only if there is a particular fault
condition with the system.
The modes are:
Flashes
Operational Modes
Flashes
Fault Modes
solid green
(remains on)
Standby mode
1 x red
Hot sensor in collector open circuit
2 x green
Flooding solar circuit
2 x red
Hot sensor in collector short circuit
3 x green
Pump flow control
3 x red
Cold sensor open or short circuit
4 x green
Pump flow established
4 x red
Top three tank thermistors
open or short circuit
5 x green
Tank at maximum temperature
5 x red
Sensor strip plugged into incorrect port on
printed circuit board (PCB)
no green
(remains off)
Call for service
6 x red
No heating fluid flow through collectors
Notes:
Warning: The removal of the lower front cover will expose 240 V wiring. Switch off the electrical supply
at the power outlet to the water heater before removing the lower front cover and if necessary
disconnecting the ribbon cable from the solar control module. The lower front cover and the ribbon cable
must only be removed by a qualified person.
The ribbon cable connecting the solar monitor to the solar control module has sufficient length to enable
the removal of the lower front cover and for it to be set to one side of the opening, without disconnecting
the ribbon cable from the solar control module.
The ribbon cable can be disconnected from the solar control module if it is necessary to remove the lower
front cover completely from the work area in front of the solar storage tank.
If the ribbon cable from the solar monitor has been disconnected, reconnect it to the solar control module
prior to replacing the lower front cover.
TO TURN OFF THE WATER HEATER
If it is necessary to turn off the water heater on completion of the installation, such as on a building site or
where the premises is vacant, then:
Switch off the electrical supply at the power outlet to the water heater.
Close the cold water isolation valve at the inlet to the water heater.
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