Daikin SkyAir Service Manual page 237

Troubleshooting by Remote Controller Display / LED Display
Check No.2
Outdoor Unit: Checking the Expansion Valve
Checking To check the electronic expansion valve, proceed as follows:
226
Step Action
1 Check if the expansion valve connector is correctly inserted in the X12A of A1P.
2 Compare the expansion valve unit with the number of the connector to make sure it is
correctly connected.
3 Switch the power OFF.
4 Switch the power ON to check whether the expansion valve is producing a clicking
sound.
If...
The expansion valve has no clicking
sound
5 Check the coil current: Open circuit < normal < short circuit
The table below contains the reference resistance values.
— White
White
Grey
Black
Yellow
Red
Orange
6 Check the clicking sound again.
If...
There is a clicking sound
There is no clicking sound
There is still no clicking sound
Grey Black
45 Ω
—
—
45 Ω
—
45 Ω
45 Ω 90 Ω
45 Ω
Then...
Disconnect the valve connector without
the clicking sound and proceed to step 5.
Yellow Red
45 Ω
45 Ω
90 Ω
—
—
90 Ω
Then...
The expansion valve works properly.
Replace the expansion valve unit.
Replace outdoor PC board A1P.
SiBE28-804
Orange
45 Ω
90 Ω
—
Troubleshooting