HOW YOUR WATER HEATER WORKS
10
Blue LED
The blue LED is dedicated to display the communication activity between the water heater and the external
control device.
Blue LED
Mode
Operational Status
Off or
Solid Blue
Disabled mode
(abnormal operation)
There may be loss of power, or
there may be a problem with the water heater
Extra fast flash
Normal operation
Current or recent communication activity
Blink flash
Abnormal operation
Loss of communication with external control device
Slow fade flash
Normal operation
No current communications activity
Yellow LED
The yellow LED generally indicates a warning that there may be a fault with the water heater.
Yellow LED
Mode
Operational Status
Off
Normal operation
System okay
– no potential fault
Solid
Warning mode
(abnormal operation)
Warning there may be a fault
(green LED will still be functioning)
Disabled mode
(abnormal operation)
In conjunction with a solid green and red LED only,
there is a fault with the water heater
Standard flash
Fault mode
(abnormal operation)
In conjunction with a red LED standard flash,
this indicates a fault code
Fast flash
Fault Display Sequence mode
(abnormal operation)
In conjunction with 1, 2, 3, 4 or 5 simultaneous green and
red LED fast flashes
– LED display is user initiated
Red LED
The red LED generally indicates a fault with the water heater.
Red LED
Mode
Operational Status
Off
Normal operation
System okay
– no fault
Solid
Disabled mode
(abnormal operation)
In conjunction with a solid green and yellow LED only,
there is fault with the water heater
Standard flash
Fault mode
(abnormal operation)
In conjunction with a yellow LED standard flash,
this indicates a fault code
Fast flash
Fault Display Sequence mode
(abnormal operation)
In conjunction with 1, 2, 3, 4 or 5 simultaneous green and
yellow LED fast flashes only
– LED display is user initiated
Tank Controller Failure
(abnormal operation)
This indicates a fault with the tank Master Controller Module
(yellow and green LEDs are off)
Notes:
A solid yellow, or flashing red and yellow LEDs simultaneously indicates there may be a fault with the
water heater.
If all LEDs are off, there may be either a loss of power to or there may be a fault with the water heater.
If the green, yellow and red LEDs are solid simultaneously, there may be a fault with the water heater.
If the red LED is fast flashing and the green and yellow LEDs are off, there may be a fault with the tank
Master Controller Module.
If the blue LED is blink flashing, there is a loss of communications between the external control device
and the water heater.
If any of the above scenarios occur, refer to
on page 20, in the Save A Service Call
section of this Owner’s Guide and Installation Instructions.
For information on Fault Display Sequence mode, refer to
on page 20.
