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Flashing blue light indicates a heat call/Hot water call.
FAILSAFE MODE: In the event of RF signal loss, your system
will be switched on for 4 minutes, then o for 11 minutes. If
you want to disable FAILSAFE MODE when RF link has been
lost then move the slide switch on the iT500RX to either the
manual or o position.
NOTE: Please go through pairing sequence again if the
switch goes orange.
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