Rheem 511161 Owner's Manual And Installation Instructions page 52

COMMISSIONING
DIAGNOSTIC FEATURES OF THE SOLAR CONTROLLER
A solar monitor is located on the side of the solar control unit 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", may indicate a potential fault mode.
The green LED will emit either a constant glow, a constant
pulsing or a series of flashes, with a two (2) second interval
between each series.
The red LED will emit either a constant glow, a constant
pulsing or a series of flashes with a two (2) second interval
between each series. A constant glow or pulsing does not
necessarily mean there is a fault with the system. A series of
flashes indicates there may be a particular fault condition with
the system.
The modes are:
Flashes Operational Modes
solid green
Standby mode
(remains on)
green Standby mode
slow pulse (power on for less than 48 hours)
green
Circulating water through collector(s)
rapid pulse
Circulating water through collector(s)
3 x green
(power on for less than 48 hours)
no green
Power outage or call for service
(remains off)
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 from three (3) to six (6) flashes in
each series of flashes. A constant glow or pulsing of the red LED does not necessarily mean there is a fault
with the system.
Note: During periods of high solar radiation and if the circulator activates after having been off, such as during
start-up if the solar collector(s) have not been covered, 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
Up"
on page 51 for the possible green and red LED pulsing 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.
Flashes Indicator or Fault Modes
solid red Hot sensor temperature
(remains on) greater than 130°C
Temperature rise across collector
red
greater than 45°C
rapid pulse
(circulator at full speed)
Hot sensor in collector – short circuit
3 x red
Hot sensor in collector – open circuit
4 x red
Cold sensor –short circuit
5 x red
Cold sensor – open circuit
6 x red
"Solar Controller Operation at Start-
52