SiBE121135_A Check
Service Diagnosis 232
8.3 Hall IC Check
Check No.04 FLXS, FDXS Series
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  Defective PCB  Replace the PCB.
If NG in step 2  Defective Hall IC  Replace the fan motor.
If OK in both steps 1 and 2  Replace the PCB.
8.4 Indoor Electronic Expansion Valve Coil Check
Check No.06 Conduct the followings to check the indoor electronic expansion valve coil (EV).
1. Check to see if the EV connector is correctly connected to the PCB.
2. Turn the power off and on again, and check to see if the EV generate latching sound.
3. If the EV does not generate latching sound in the above step 2, disconnect the connector
and check the continuity using a tester.
4. Check the continuity between the pins 1 - 6, 2 - 6, 3 - 6, and 4 - 6. If there is no continuity
between the pins, the EV coil is faulty.
5. If the continuity is confirmed in the above step 3, the PCB is faulty.
Note: Please note that the latching sound varies depending on the valve type.
1
Gray (power supply)
Purple (signals)
Blue (grounding)
2
3
(R14211)
S7
Harness 5P
6P Connector
(5)
Check
6-1
6-2
6-3
6-4
1 2 3 4 5 6
(R15307)
S50 (relay connector)
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