HOW YOUR WATER HEATER WORKS
9
LED OPERATION
The water heater has four coloured LEDs, housed on the
front of the Master Controller Module on the lower front of
the water heater. The LEDs indicate the operational status
of the water heater.
The four colours and their indicating status are:
Blue
indicates the communication status
Red
indicates a fault
Yellow indicates a warning that there may be a fault
Green indicates normal operation
Types of LED Operation
There are seven (7) types of illumination the LEDs may provide. These are:
Illumination
Time
LEDs
Off
remains off
all LEDs
Solid
remains on
all LEDs
Standard flash
1 sec on, 1 sec off
green, yellow and red LEDs
Fast flash
0.25 sec on, 0.25 sec off
green, yellow and red LEDs
Extra fast flash
0.05 sec on, 0.05 sec off
blue LED only
Blink flash
0.25 sec on, 1.75 sec off
blue LED only
Slow fade flash
0.25 sec on, 0.25 sec fade,
0.25 sec off, 0.25 sec fade
blue LED only
Green LED
The green LED generally indicates various stages of normal operation.
Green LED
Mode
Operational Status
Off
no illumination
Disabled mode
(abnormal operation)
There may be loss of power, or
there may be a fault with the water heater
Solid green
Standby mode
(normal operation)
Water is either fully heated, or at set temperature and ready
for further heating when excess solar PV power is next
available. No heating taking place.
Standard flash
(continuous flashes)
Variable Heating mode
(normal operation)
Top or bottom heating unit operating, only when excess
solar PV power generation is available*
Standard flash
(2 x flashes, interval)
Maintenance mode
(normal operation)
Top heating unit heating water to 60°C, operating with utility
grid electricity supply, and taking advantage of excess solar
PV power if available
Standard flash
(3 x flashes, interval)
Standalone mode
(abnormal operation)
Heating unit operating with utility grid electricity supply due
to either a loss of communication with external control
device, or if no external control device is connected
(advantage of excess solar PV power generation taken if
available)
Standard flash
(4 x flashes, interval)
Safety Compliance mode
(normal operation)
Bottom heating unit heating water to meet a Code safety
and compliance requirement, operating with utility grid
electricity supply
Standard flash
(5 x flashes, interval)
Element Calibration mode
(normal operation)
Short intermittent system check on the elements in each
heating unit, may operate with utility grid electricity supply
Fast flash
Fault Display Sequence mode
(abnormal operation)
In conjunction with 1, 2, 3, 4 or 5 simultaneous yellow and
red LED fast flashes
– LED display is user initiated
(* A minor amount of grid energy may be used as the PowerStore control system tracks available excess solar PV production.
This is normal operation.)
LED interface
green LED
yellow LED
red LED
blue LED
Push Button
