AC–42 AIR CONDITIONING SYSTEM – TROUBLESHOOTING Blinking Light REC M2 Air Mix Damper Position Sensor Circuit CIRCUIT DESCRIPTION This sensor detects the position of the air mix damper and sends the appropriate signals to the A/C amplifier. The position sensor is built into the air mix damper control servo motor assembly. (V) 4 TP terminal voltage 1 0 100% (Cool) (Hot) Damper opening angle AC2184 Light | Diagnostic Sensor Check Detecting Condition | Trouble Area REC | Short to ground or power source circuit in air mix damper position sensor circuit. | • Air mix damper position sensor • Harness or connector between air mix damper control servo motor assembly and A/C amplifier • A/C amplifier M2 | Air mix damper position sensor value does not change even if A/C amplifier signals the air mix damper control servo motor to operate. WIRING DIAGRAM To Solar Sensor BR-W 5 >>|IG1| BR-W BR-W 2 4 A13 ⊕ 5 V S5 ⊕ 5 V G-W 8 >>|IG1| G-W 18 3 A13 TP 777 V-W 4 >>|IG1| V-W 9 5 A13 SG 777 Air Mix Damper Position Sensor (Air Mix Damper Control Servo Motor) A/C Amplifier AC2923