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NI804
Operation Indicators
WarmFlo Controller –
Inside View, Left Board
Monitor LED’s on Front
Green LED
Illuminated when WarmFlo II is receiving 24V power. Under all normal operating modes, this should be
solid green.
As a secondary function this green LED provides status of the two remote sensors. If a
sensor is inoperative, incorrectly wired, or malfunctioning; this monitor light is in a blinking
or pulsing mode. By checking the pulsing pattern, the appropriate sensor can be identified.
ST sensor - two, 1ØØ ms blinks every second.
Amber LED
Illuminated when WarmFlo II is in the electric heat operating mode (Utility Load Control).
Inside WarmFlo Board, Red LED’s
The four red LED’s next to the output connector indicate Stage 1, 2, 3, and 4 operation (stage 1 is on the
top).
Electric Furnace Control –
Inside View, Right Board
Green, next to Fuse
24-volt power connected and fuse good.
Red, next to W
Call for electric heat, represents the input signal (yellow wire) to the WarmFlo control board.
Green, Cool
Conventional H/C stat has an active Y function or heat pump stat reversing valve is in the cool mode (will
depend upon proper setup with RV logic jumper). For 2-speed AC this LED is illuminating during high
speed.
Amber
Represents action within ECM™ blower motor. Factory technician troubleshooting only.
