When a NRG Control displays “LOCK OUT”, the heater has missed ignition or flame signal during operation.

A suspended warm air heater can be reset from the control as long as the wiring connection between the heater and control has been enabled.

If the lock out wiring as not been connected, a lock out fault can still be identified and reset on the following current heaters:

• CTU Red and Green light on the front of the heater become illuminated, if enabled the NRG will display “LOCK OUT” can be reset by pressing the RESET button on the NRG control, or by pressing the Red rocker switch on the back of the heater this needs to be pressed and held down for 5 seconds.
• CTCU Red rocker switch on the back of the heater becomes illuminated, if enabled the NRG will display “LOCK OUT” can be reset by pressing the RESET button on the NRG control, or by pressing the Red rocker switch on the back of the heater this needs to be pressed and held down for 5 seconds.
• MGB/MOB Indication light on the burner control box becomes illuminated, if enabled the NRG will display “LOCK OUT” Lockout reset is normally enabled if the heater is installed at high level can be reset by pressing the RESET button on the NRG control, or by pressing the illuminated button on the burner in an normal floor mounted installation.

PLEASE REMEMBER: Pressing the reset button on oil fired and LPG fired cabinet heaters can build up un-burnt fuel in the heat exchanger.

If in doubt call your usual engineer or contact [email protected] to arrange an engineers.