COMMISSIONING
46
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 flashes.
The red LED will emit a series of flashes, with a 2 second
interval between flashes, 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 green
Flooding solar circuit
1 x red
Hot sensor in collector – open circuit
2 x green
Checking solar contribution
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
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 an authorised or 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.
If the connecting plug has a yellow label on one side, care should be taken when reconnecting the
ribbon cable to the solar control module, to ensure the side of the connecting plug with the yellow
label is
facing toward
the front cover opening. This type of connecting plug is non polarised and if
it is connected with the side of the connecting plug with the yellow label facing away from the front
cover opening, the functions of the green and red LEDs will be reversed. This will result in the red
LED flashing instead of the green LED at solar pump start up.
