Note On Intermittents
If an intermittent Code B115 is being set, check B115 snap data value for sun load temperature, BD32 display. If BD32 display value is less than -29°F (-34°C), code resulted from an open in circuit No. 590 or 736, or sun load temperature sensor. If BD32 display value is greater than 85°C, code resulted from a short to ground on circuit No. 590 or shorted sun load temperature sensor. Manipulate related wiring while observing BD32 display. If failure is induced, reading will jump from its normal value to a reading outside the range of -29°F (-34°C) to 209°F (85°C).
If value displayed by BD32 display is not reasonably close to a corresponding thermometer reading, check for poor terminal contact or replace sensor.