LG Multi F Series Installation Manual page 88

FINAL INSTALLATION PROCEDURES

Wiring Error Check

Use to verify if wiring is properly installed.

1. Shut power down to the system.

2. Set DIP Switch 2 to ON.

3. Turn power on to the system.

4. Check if the Red and Green LEDs on the outdoor unit PCB are ON (indicate indoor units are in forced

operation mode).

5. If the wiring is correctly installed, the Green LED will light up. If the wiring is incorrectly installed, the

Red and Green LEDs will blink, indicating which part of the system is in error.

• Red LED = Piping Number

• Green LED = Wiring Number (Room)

Example: If the Red LED blinks twice and the Green LED blinks three times, the second

piping to the third room is in error (see at right).

• If the indoor unit(s) are not communicating properly to the outdoor unit, the Wiring

Error Check cannot operate correctly.

• Only the part of the system in error will be displayed. System will operate correctly

after the error is fixed.

• If outdoor and indoor temperatures are too low (ex.: winter), the wiring error check function will not operate (Red LED is ON).

• Turn DIP Switch 2 to OFF after finishing (Normal Operation setting).

• Only the first four DIP switches are functional on the LMU480, 540, 600HV.

Reducing Power Consumption

Enables more efficient system operation by reducing the maximum power consumption

value (reducing the MCA).

1. Shut power down to the system.

2. For Step 1, set only DIP Switch 3 to ON. For Step 2, set only DIP Switch 4 to ON.

3. Turn power on to the system.

Table 39: Reducing Power Consumption Current Levels.

Phase

Model

Multi F

LMU18CHV,

LMU24CHV

Step 1 (A)

9

Step 2 (A)

8

• Reduced Power Consumption reduces outdoor unit capacity.

• Only the first four DIP switches are functional on the LMU480, 540, 600HV.

88

1Ø

Multi F

Multi F MAX

LMU30CHV,

LMU480HV,

LMU36CHV

LMU540HV,

LMU600HV

13

22

11

21

Due to our policy of continuous product innovation, some specifications may change without notification.

©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. "LG" is a registered trademark of LG Corp.

Figure 115: Wiring Error Check Example.

LED 1

(Red)

LED 2

(Green)

Figure 116: Reducing Power Consumption Chart.

Power

Consumption

and Current

Figure 117: Reducing Power Consumption DIP Switch Settings.

Step 1

ON

OFF

1 2

3

4

1 2

3

4

F

MULTI

F

MULTI

MAX

Figure 114: Wiring Error Check

3

DIP Switch Setting.

ON

OFF

1 2

3

4

1 2

3

4

Two (2)

Three (3)

Blinks

Blinks

One (1)

One (1)

Second

Second

Two (2)

Three (3)

Blinks

Blinks

One (1)

Second

Normal

Step 2

ON

OFF

1 2

3

4

1 2

3

4

One (1)

Second

Time