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AC–69 AIR CONDITIONING SYSTEM – TROUBLESHOOTING Temperature Set Dial Circuit CIRCUIT DESCRIPTION When temperature set dial is turned, the voltage of TSET terminal will change. A/C amplifier searches for this change and controls the room temperature according to the temperature set. WIRING DIAGRAM A/C Control Assembly A/C Amplifier 5 V S5 H12 BR-W A13 10 2 TSET H12 L-B A14 2 11 SG H12 V-W A13 11 9 777 NO8885