Rinnai Energysaver RHFE-1004FDT How To Use Manual page 12

The Function Lock will help to prevent accidental operation as well as small children from
altering the heater settings.
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The Function Lock can be operated either when the
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heater is running, or in the "stand by" mode, by
pressing the up and down buttons simultaneously.
The Function is activated and the Function Lock
~ndicator will glow.
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To de-activate the Function Lock, simply press both
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arrow buttons simultaneously for 2 seconds and the
Economy
Function Lock indicator will go out. The lock can be
de-activated at any time in this way.
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' W hen the Function lock is activated during normal operation all heater controls other than the>
OFF switch will be locked. Deactivating the lock releases the controls. If the lock is activated
whilst the heater is turned OFF, then all heater functions will be locked. If the heater is turned
OFF whilst the Function lock is activated, it cannot be turned ON again until the lock is
deactivated.
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