AC/Air Conditioning — Blinking Light Def Solar Sensor Circuit, page 36

AC–36
AIR CONDITIONING SYSTEM – TROUBLESHOOTING

Blinking Light DEF Solar Sensor Circuit

CIRCUIT DESCRIPTION

A photo diode in the solar sensor detects solar radi–
ation and sends signals to the A/C amplifier.

Resistance of photodiode
High
Low
Weak          Strong
Strength of
solar radiation

Diagnostic Sensor Check Detecting Condition          Trouble Area

Open or short in solar sensor circuit.
Please not that blinking of the LED for DEF is not
abnormal when the sensor is not receiving solar
radiation.
• Solar sensor
• Harness or connector between solar sensor and
  A/C amplifier
• A/C amplifier

WIRING DIAGRAM

A/C Amplifier

5 V

BR-W          2
A13          S5

Solar Sensor          2

1
Y-G          17
A13          TS

V-W          9
← – –          A13          SG

NO8813