Check SiBE041012_A129 Service Diagnosis5.8 Rotation Pulse Check on the Outdoor Unit PCBCheck No.16 25/35 class1. Check that the voltage between the pins 10 - 11 is 15 VDC.2. Check if the Hall IC generates the rotation pulse (0 ~ 15 VDC) 4 times between the pins 10 -12, 10 - 13, when the fan motor is manually rotated once.50 classMake sure that the voltage of 320 ± 30 V is applied.1. Set operation off and power off. Disconnect the connector S70.2. Check that the voltage between the pins 4 - 7 is 320 VDC.3. Check that the control voltage between the pins 3 - 4 is 15 VDC.4. Check that the rotation command voltage between the pins 2 - 4 is 0 ~ 15 VDC.5. Keep operation off and power off. Connect the connector S70.6. Check whether 2 pulses (0 ~ 15 VDC) are output at the pins 1 - 4 when the fan motor isrotated 1 turn by hand.When the fuse is melted, check the outdoor fan motor for proper function.If NG in step 2 → Defective PCB → Replace the outdoor unit PCB.If NG in step 4 → Defective Hall IC → Replace the outdoor fan motor.If OK in both steps 2 and 4 → Replace the outdoor unit PCB.13121110987654321S70Phase U15 VDCPhase VPhase WHU (Hall IC)HV (Hall IC)Free pinFree pinFree pinFree pinFree pinFree pin(R11907)1234567 320 VDC(R10811)S70PCBActual rotation pulse output (0 ~ 15VDC)Rotation command pulse input (0 ~ 15VDC)15 VDC
