Indoor Fan Motor Connector Check; Hall Ic Check - Daikin 2MXS-N Series Service Manual

SiUS121502E
8.2

Indoor Fan Motor Connector Check

Check No.02 CTXS, FTXS, FVXS Series
1. Check the connection of connector.
2. Check motor power supply voltage output (pins 4 - 7).
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).
8.3

Hall IC Check

Check No.04 CDXS, FDXS Series
1. Check the connector connection.
2. With the power on, operation off, and the connector connected, check the following.
Service Diagnosis
S1
7
6
5
4
3
2
1
(1) Output voltage of about 5 V between pins 1 and 3.
(2) Generation of 3 pulses between pins 2 and 3 when the indoor fan motor is operating.
If NG in step (1) Defective PCB
If NG in step (2) Defective Hall IC
If OK in both steps (1) and (2)
Motor power supply voltage (310 ~ 340 VDC)
Unused
Unused
GND
Motor control voltage (15 VDC)
Rotation command voltage (1~ 6.5 VDC)
Rotation pulse input
Replace the PCB (control PCB).
Replace the indoor fan motor.
Replace the PCB (control PCB).
S7
1 Gray (power supply)
2 Purple (signals)
3
Blue (grounding)
(R19654)
(R14211)
Check
167