ESIE13-02
Additional Checks for Troubleshooting
151
Part 4 – Troubleshooting
4
3
4
5
4
6.2
Check No.2 - 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 X12A of A1P.
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.
—
White
Grey
Black
Yellow
Red
Orange
White
—
∞
45
Ω
∞
45
Ω
∞
Grey
∞
—
∞
45
Ω
∞
45
Ω
Black
45
Ω
∞
—
∞
90
Ω
∞
Yellow
∞
45
Ω
∞
—
∞
90
Ω
Red
45
Ω
∞
90
Ω
∞
—
∞
Orange
∞
45
Ω
∞
90
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 A1P.
