Daikin FTX20K2V1B, Service Manual

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SiBE041525F Check
Service Diagnosis 80
5.2 Indoor Fan Motor Connector Output Check
Check No.03
 Fan motor wire breakdown / short circuit check
1. Check the connector for connection.
2. Turn the power off.
3. Check if each resistance at the phases U - V and V - W is 90
Ω ~ 100 Ω (between the pins
12 - 9, and between 9 - 6).

Motor control voltage check
1. Check the connector for connection.
2. Check the motor control voltage is generated (between the pins 2 - 3).

Rotation pulse check
1. Check the connector for connection.
2. Turn the power on and stop the operation.
3. Check if the Hall IC generates the rotation pulse 4 times when the fan motor is manually
rotated once (between the pins 1 - 3).
(R11979)
12
11
10
9
8
7
6
5
4
3
2
1
Phase U
Free pin
Free pin
Free pin
Free pin
Free pin
Free pin
Phase V
Phase W
GND
Motor control voltage (15 VDC)
Rotation pulse (5 VDC)
S200