TM031 Integrity 18, 20, 24, 26L Service Instructions REV: B
D.O.I: February 2008
This document is stored and maintained electronically by Service. All printed copies not bearing this statement in RED are deemed “uncontrolled”
Resetting Error Codes
Most Error Codes can be reset by shutting off the hot water flow and turning the controllers
(if fitted) off and then on again. It may also be necessary to isolate and restore the power.
Where controllers are not fitted it may be necessary to turn the power off at the water
heater to clear the error code.
Voltages up to 240 volts will be present within the water heater, take care
not to touch wiring terminals. Use an insulated tool when operating the DIP
switch or MIN and MAX buttons.
To reset Error Code 99 it is necessary to:
1. Ensure water is not flowing through the water heater.
2. Turn off remote controllers (if fitted).
3. Ensure all DIP SWITCHES are in the off position (down position).
4. Turn DIP SWITCH 2 on (up position) and then off (down position).
5. Within 5 seconds of turning DIP SWITCH 2 off, press and hold both the MIN and MAX
buttons for more than 2 seconds.
6. “UL” will flash in the LED display and then become steady.
7. Turn on a controller (if fitted) then open and close a hot water tap to complete the
procedure.
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