10/04/2007 16
NI802
Bad sensor, could disable cooling –
depending upon the ODT setting a bad sensor, even during cooling,
can affect the ODT of the compressor and the compressor will be off. Temporary fix is to set the ODT
dial to “0” position and get the sensor fixed. Verify with plug-in Analyzer and/or no blinking green LED.
Analyzer readout, sensor temperature constant 32° or 0°
– these two values represent digital bit
patterns that are hard to predict an error function. A blinking green light may or may not be experienced.
Typically the cable is too long, wrong type of sensor wire, or some electrical interference on the sensor
cable.
24-Volt Fuse –
the internal fuse is between the Electric Furnace transformer and all other WarmFlo II
functions, including the “R” going to the outdoor unit. Use only two amp, fast blow.
Heat Pump Only, Reversing Valve Logic
Depending upon manufacturer’s outdoor unit and room thermostat, the RV wire (O or B) can either be
high for cool or high for heat. Set the jumper on the top of the board in the appropriate position for 24
volts/high.
