Specifications

COMMISSIONING
57
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 above 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
solid green
(remains on)
Standby mode
2 x green
Flooding solar circuit
3 x green
Pump flow control
4 x green
Pump flow established
5 x green
Tank at maximum temperature
no green
(remains off)
Call for service
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
5 x red
Sensor strip plugged into incorrect port on printed circuit board (PCB)
6 x red
No heating fluid flow through collector
If the power supply to the water heater is on and the green LED is off or the red LED is flashing, this
indicates there is a fault with the water heater. The red LED may emit up to six flashes in each series of
flashes. Count the number of flashes and phone Rheem Service or their nearest Accredited Service Agent to
arrange for an inspection.