LG ARUB120LTE4, Installation Manual

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27
ENGLISH
CAUTION
It should be wiring power cables or communication cables to
avoid interference with the oil level sensor. Otherwise, That oil
level sensor would be operated abnormally.
!
Example) Connection of power and communication cable (UX2)
Main power
terminal block
Ground wire
Power/
Ground cable
Over
50mm(1.97”)
gap
Communication
cable
Main power
terminal block
Ground wire
Power/
Ground cable
Over
50mm(1.97”)
gap
Communication
cable
Main power
terminal block
Ground wire
Power/
Ground cable
Over
50mm(1.97”)
gap
Communication cable
Fix firmly not
to be displaced
Main power
terminal block
Insulation sleeves
attachments
ODU-IDU
Communication cable
ODU-ODU
Communication cable
Main power
terminal block
Ground wire
Power/Ground cable
Over
50mm(1.97”) gap
Communication
cable
Left Side Right Side
Front Side 1 Front Side 2
Main Power Connection Communication Connection
CAUTION
It should be wiring power cables or communication cables to avoid
interference with the oil level sensor. Otherwise, That oil level sensor
would be operated abnormally.
!
Example) Connection of power and communication cable (UX3)
Main power
terminal block
Ground wire
Power/
Ground cable
Over 50mm
(1.97”)gap
Communication
cable
e
wer
Main power
terminal block
Ground wire
Power/
Ground cable
Over 50mm
(1.97”)gap
Communication
cable
e
wer
Main power
terminal block
Ground wire
Power/
Ground cable
Over 50mm
(1.97”)gap
Communication cable
Main power
terminal block
Insulation sleeves
attachments
Fix firmly not
to be displaced
ODU-IDU
Communication cable
ODU-ODU
Communication cable
e
wer
Main power
terminal block
Ground wire
Power/Ground cable
Over
50mm (1.97”)gap
Communication
cable
Left Side Right Side
Front Side 1 Front Side 2
Main Power Connection Communication Connection
Checking the setting of outdoor units
Checking according to dip switch setting
- You can check the setting values of the Master outdoor unit from the
7 segment LED.
The dip switch setting should be changed when the power is OFF.
Checking the initial display
The number is sequentially appeared at the 7 segment in 5 seconds
after applying the power. This number represents the setting condition.
• Initial display order
• Example) ARUB620LTE4
• Master Unit • Slave Unit
Dip switch setting Dip switch setting ODU Setting
Slave 1
Slave 2
Slave 3
Order No Mean
①
8~20 Master model capacity
②
10~20 Slave 1 model capacity
③
10~20 Slave 2 model capacity
④
10~20 Slave 3 model capacity
⑤
8~80 Total capacity
⑥
1 Cooling Only
2 Heat Pump
3 Heat Recovery
⑦
38 380V model
46 460V model
22 220V model
⑧
1 Full function
2 Core function
① ② ③ ④ ⑤ ⑥ ⑦ ⑧
18 16 14 14 62 3 38 1
Example) Connection of transmission wire
[BUS type] [STAR type]
- Connection of communication
cable must be installed like
below figure between indoor
unit to outdoor unit.
- Abnormal operation can be
caused by communication de-
fect, when connection of com-
munication cable is installed like
below figure(STAR type).