Daikin J Series Service Manual Page 269

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  • TROUBLESHOOTING
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Troubleshooting - Outdoor Unit Related SiE18-201
258 Service Diagnosis
3.4.15 Inverter Units Hall IC Check
Check No.15 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
Failure of (1) faulty PCB Replace the PCB.
Failure of (2) faulty hall IC Replace the fan motor.
Both (1) and (2) result Replace the PCB.
The connector has 3 pins, and there are three patterns of lead wire colors.
3.4.16 Inverter Units Indoor Unit PCB (2) Output Voltage Check
Check No.16 1. Check the connector connection (breaking of wire check).
2. With the power On and Off, check the following.
Output voltage of about 5 VDC between pins 6 and 7.
Gray (power supply)
White (power supply)
White with black line (signals)
White with manufacturer Åfs mark (grounding)
Purple (signals)
Blue (grounding)
(ML106)
Measure the voltage
between these.
Zero cross
(ML107)
12V
5V
S35
1
2
3
4
5
6
7
Rotation speed pulse input
(0°C 5V)
Indoor unit-outdoor unit
transmission (receiving)
Indoor unit-outdoor unit
transmission (transmitting)
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