RECEIVER LED INDICATORS
The LED indicators on the ST620RF Receiver are designed to give a clear and easily understood indication
of the current state of the system.
The various LED signal combinations and descriptions of what they indicate are shown in the table
below:
LED State Indication
Blue On Receiver is in Manual mode and system is calling for heat.
Blue Flashing Receiver is in Automatic mode and system is calling for heat.
once per
second
Blue Off Receiver is in Automatic mode and system is NOT calling for heat
Green On Power is on
Green Flashing Receiver has received correct RF address and Command
for 4 signal when in Failsafe mode
seconds
Red On and Receiver is either receiving a new RF address code in SYNC mode,
flashing or has failed to store the new RF address code when in SYNC mode
Yellow On Receiver is in Failsafe mode after no RF signal received for over 1 hour
ST620RF INSTRUCTION MANUAL12
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