Installation Guide and Manual

12) FAULTS are communicated through the LCD display. The

display will switch from the SETPOINT screen to the FAULT

screen and back again every 3 seconds. FAULTS indicate an

undesirable condition and will immediately shut down the

operation of the heater. If faults are appearing on your heater

call Eemax Technical Support for assistance.

Fault Codes

F0: Outlet thermistor out of range

F1: No change in water temperature detected

F2: Dry fire detected - Optical Sensor Tripped

F3: Excessive dry fire occurrences detected

F4: Inlet thermistor out of range

13) The security of the heater settings is provided by pressing

and holding the LEFT and UP buttons for 3 seconds to lock the

buttons. Once locked, the buttons have no function. Press and

hold the same LEFT and UP buttons for 3 seconds to unlock the

buttons.

The security status can be checked at any time by pressing any

one button. If the system is locked, the screen will display

“BUTTONS LOCKED”.

[ + ] =

14) The display can be turned off or on. Press and hold the

DOWN and RIGHT buttons for 3 seconds. If the display is off, it

can be turned on by pressing and holding the same DOWN and

RIGHT buttons for 3 seconds.

1 ERROR

CODE1:F0

SOFTWARE

20131218

BUTTONS

LOCKED