SiBE07-618_D CheckService Diagnosis 1015.1.12 Rotation Pulse Input on the Outdoor Unit PCB CheckCheck No.15 Make 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.5.1.13 Hall IC CheckCheck No.16 1. Check the connector connection.2. With the power on, operation off, and the connector connected, check the following.∗Output voltage of about 5 V between pins 1 and 3.∗Generation of 3 pulses between pins 2 and 3 when the fan motor is operating.If NG in step 1 Æ Defective PCB Æ Replace the PCB.If NG in step 2 Æ Defective Hall IC Æ Replace the fan motor.If OK in both steps 1 and 2 Æ Replace the PCB.1234567Actual rotation pulse output (0 ~ 15VDC)Rotation command pulse input (0 ~ 15VDC)15 VDC320 VDC(R10811)S70PCB1S7Gray (power supply)Purple (signals)Blue (grounding)23(R14216)
