SiBE06-514A CheckService Diagnosis 1175. Check5.1 How to Check5.1.1 Fan Motor Connector Output CheckCheck No.01 1. Check connector connection.2. Check motor power supply voltage output (pins 4-7 and 4-8).3. Check motor control voltage (pins 4-3).4. Check rotation command voltage output (pins 4-2).5. Check rotation pulse input (pins 4-1).Check No.02 1. Check connector connection.2. Check motor control voltage output (pins 2-1).5.1.2 Limit Switch Continuity CheckCheck No.03 Remove the front grille. The limit switch is located at the left side of the drain pan assembly.Check the continuity of the switch connection.∗ The shutter can be opened and closed with hand. Keep the shutter open and closed all theway for each continuity check steps.7654321Motor power supply voltageUnusedUnusedP.0V (reference potential)Motor control voltage (15 VDC)Rotation command voltage (1~ 5 VDC)Rotation pulse inputUpper fan connector87654321Motor power supply voltageUnusedUnusedUnusedP.0V (reference potential)Motor control voltage (15 VDC)Rotation command voltage (1 to 5 VDC)Rotation pulse inputLower fan connector(R1224)54321Motor power supply voltageUnusedUnusedP.0V (reference potential)Motor control power supplyS202(R1073)TesterLimit switchForwardUpwardShutter statusContinuityClosedNo continuityOpenContinuity(Q0363)
