Daikin FHC45BZ7V1, Service Manual

Page: 301 / 304

ESIE02–01 Additional Checks for Troubleshooting
Part 3 – Troubleshooting 3–71
3 3
4
5
1
5.7 Outdoor Unit: Checking the Expansion Valve
Checking To check the electronic expansion valve, proceed as follows:
Step Action
1 Check if the expansion valve connector is correctly inserted in the X24A of PCB 1.
2 Compare the expansion valve unit with the number of the connector to make sure it is cor-
rectly connected.
3 Switch the power OFF.
4 Switch the power ON to check whether the expansion valve is producing a clicking sound.
5 Check the coil current: Open circuit < normal < short circuit
6 Check the clicking sound again.
If... Then...
The expansion valve has no
clicking sound Disconnect the valve connector without the
clicking sound and proceed to step 5.
The table below contains the reference resistance values.
—
Grey Black Yellow Red Orange
Grey
— 40-50 Ω 40-50 Ω 40-50 Ω 40-50 Ω
Black
40-50 Ω — 80-100 Ω 80-100 Ω 80-100 Ω
Yellow
40-50 Ω 80-100 Ω — 80-100 Ω 80-100 Ω
Red
40-50 Ω 80-100 Ω 80-100 Ω — 80-100 Ω
Orange
40-50 Ω 80-100 Ω 80-100 Ω 80-100 Ω —
If... Then...
There is a clicking sound The expansion valve works properly.
There is no clicking sound Replace the expansion valve unit.
There is still no clicking sound Replace outdoor PCB 1.