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4-3. Outdoor unit Electronic Expansion Valve (EEV)

¢ Models: AOYG36KRTA, AOYG45KRTA, and AOYG54KRTA

Check point 1. Check connections

Check connection of connector. (Loose connector or open cable)

NOTE: For details of wiring diagram, refer to "Wiring diagrams" in Chapter 2. TECHNICAL DATA

AND PARTS LIST.

Check point 2. Check coil of EEV

Remove connector, check each winding resistance of coil.

Read wire Resistance value

1(Red) - 2(Blue)

46 Ω ± 3 Ω

at 20°C

1(Red) - 3(Orange)

1(Red) - 4(Yellow)

1(Red) - 5(White)

→ If Resistance value is abnormal, replace EEV.

Check point 3. Check Voltage from main PCB

Remove connector and check voltage (DC 12 V)

→ If it does not appear, replace main PCB.

Check point 4. Check noise at start up

Turn on the power and check the operation noise.

→ If an abnormal noise does not show, replace main PCB.

Check point 5. Check Opening and Closing Operation of Valve

When valve is closed, it has a temp. difference

between inlet and outlet

Pipe (In)

Pipe (Out)

Hi TEMP.

Normal TEMP.

Example : Hot Gas

If it is open, it has no temp. difference between

inlet and outlet

Pipe (In)

Hi TEMP.

OPEN

Example : Hot Gas

Pipe (Out)

Hi TEMP.

4-3. Outdoor unit Electronic Expansion Valve (EEV) - (03-55) - 4. Service parts information

TROUBLESHOOTING

Fujitsu AOYG54KRTA Service Manual

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