Forced Cooling Operation; Wiring Error Check - LG MU5R40 Installation Manual

Forced Cooling Operation

Adding the refrigerant in winter.
Setting Procedure
1
Set the DIP Switch as follow after shutting the power source down.
2
Reset the power.
3
Check that the Red LED of PCB is on during work. (The indoor unit is operated by force.)
4
Add the specific amount of refrigerant.
CAUTION
!
- When the green LED of PCB is on, compressor is going to be off because of low pres-
sure.
- You should return the DIP Switch to operate normally after finishing the operation.

Wiring Error Check

You can check whether or not the wiring is correct.
Setting Procedure
1
Set the DIP Switch as follow after shutting the power source down.
2
Reset the power.
3
Check that the Red and Green LED of PCB are on during work.
(The indoor unit is operated by force.)
4
If the wiring is correct, the Green LED will light up.
If the wiring is wrong, display as below (Display only wrong connection.)
・ Red LED : Piping Number
・ Green LED : Wiring Number (Room)
FUNCTION
27