Led functions – Steffes Transceiver User Manual
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17
LED FUNCTIONS
LED 1 and 2
The relays on the transceiver have LED’s. On the 2-
pole transceiver, these are marked Relay 1, (1), and 
Relay 2, (2). When the corresponding LED is on, the 
relay is energized and should be closed. When the 
corresponding LED is off, the relay is not energized 
and should be open. 
LED 3
When set up as a transmitter, LED 3, (3), blinks OFF 
and ON in 4 second intervals with a percentage of ON 
time as based on the outdoor temperature. The graph 
below illustrates the percent of time the LED is ON at 
various temperatures. 
 
The warmer the outside temperature, the longer the 
LED stays ON. At 65° F or warmer, the LED is ON 
solid. 
When the operation mode is receiver, LED 3 indicates 
when the PLC signal reception is established from the 
transmitting device. It blinks OFF-and-ON slowly then 
increasingly faster until it is ON solid. ON solid 
indicates that PLC reception is “locked in”. 
 
NOTE: It can take 2-3 minutes for PLC signal
reception when using a “fast” channel and 
7-10 minutes when using a “slow” 
channel.
LED 4
LED 4, (4), responds to the power company’s control 
signal. 
• OFF when receiving an off-peak signal
• ON solid if an override switch is enabled
• blinking OFF and ON according to the type of
signal being received from the control device.
This graph illustrates the time, in seconds, the LED is 
OFF-and-ON during various types of signal periods. 
NOTE: Power company peak signal overrides
anticipated-peak and/or setback signals.
4
3
1
2
