COMMISSIONING
47
DIAGNOSTIC FEATURES OF THE SOLAR CONTROLLER
A solar monitor is located on the front of the top 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
green
slow pulse
Standby mode
(power on for less than 48 hours)
green
rapid pulse
Circulating water through collectors
3 x green
Circulating water through collectors
(power on for less than 48 hours)
no green
(remains off)
Power outage or call for service
Flashes
Fault Modes
solid red
(remains on)
Hot sensor temperature greater than 130°C
red
rapid pulse
Temperature rise across collector
greater than 40°C (circulator at full speed)
3 x red
Hot sensor in collector – short circuit
4 x red
Hot sensor in collector – open circuit
5 x red
Cold sensor – short circuit
6 x red
Cold sensor – open circuit
If the power supply to the solar control unit is on and the green LED is off or the red LED is flashing, this
indicates there may be a fault with the water heater. The red LED may emit up to six flashes in each series of
flashes.
Notes:
During periods of high solar radiation and if the circulator activates after having been off, such as during
start up, it is possible the red LED may emit a rapid pulse for a period of up to ten (10) minutes. This
does not indicate a fault.
Refer to
“To Fill And Turn On The Water Heater”
on page 45 for the possible green and red LED
flashing sequence during start up procedure.
If the red LED continues to emit a rapid pulse for longer than ten (10) minutes, or emits a series of flashes,
then count the number of flashes and phone Rheem Service or their nearest Accredited Service Agent to
arrange for an inspection.
