AC/Air Conditioning — Blinking Light Rec M2 Air Mix Damper Position Sensor Circuit, page 42

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