Static Pressure Compensation Mode; Night Low Noise Function; Overall Defrost Mode - LG Multi V IV PRHR041 Installation Manual

Group recognizing the central controller
No.0 group (00~0F)
No.1 group (10~1F)
No.2 group (20~2F)
No.3 group (30~3F)
No.4 group (40~4F)
No.5 group (50~5F)
No.6 group (60~6F)
No.7 group (70~7F)
No.8 group (80~8F)
No.9 group (90~9F)
No. A group (A0~AF)
No. B group (B0~BF)
No. C group (C0~CF)
No. D group (D0~DF)
No. E group (E0~EF)
No. F group (F0~FF)
WARNING
!
• Valve address and central control address of its corresponding in-
door unit should be set identical in manual addressing.
EX)
HR unit

Static pressure compensation mode

This function secures the air flow rate of ODU, in case static pressure
has been applied like using duct at fan discharge of ODU.
Static pressure compensation mode setting method
Master unit PCB DIP switch on : No.5
Select the mode using '▶', '◀' Button :
"Func" Push the '●' button
Select the Function using '▶', '◀' Button :
"Fn2" Push the '●' button
Select the Option using '▶', '◀' Button :
"op1~op3" Push the '●' button
Start the Static pressure compensation mode :
Save the selected option value in EEPROM
FAN Maximum RPM of each step
Capacity
Standard
op1
Max. RPM
op2
op3
Valve (04) Indoor unit (04)
Valve (03) Indoor unit (03)
Valve (02) Indoor unit (02)
Valve (01) Indoor unit (01)
Central control address
8~12 HP 14~20 HP
730 950
760 1020
780 1050
800 1130

Night Low Noise Function

In cooling mode, this function makes the ODU fan operate at low RPM
to reduce the fan noise of ODU at night which has low cooling load.
Night low noise function setting method
Master unit PCB DIP switch on : No.5
Select the mode using '▶', '◀' Button :
"Func" Push the '●' button
Select the Function using '▶', '◀' Button :
"Fn3" Push the '●' button
Select the Option using '▶', '◀' Button :
"op1~op12" Push the '●' button
Start the Night low noise function :
Save the selected option value in EEPROM
Time Settings
Step Judgment Time(Hr)
op1
op2
op3
op4
op5
op6
op7
op8
op9
op10
op11
op12
Noise
Heat Pump
Step
op1~op3, op10
op4~op6, op11
op7~op9, op12
CAUTION
!
• Request installer to set the function during installation.
• If ODU RPM changes, cooling capacity may go down.

Overall defrost mode

Mode setting method
Master unit PCB DIP switch on : No.5
Select the mode using '▶', '◀' Button :
"Func" Push the '●' button
Select the Function using '▶', '◀' Button :
"Fn4" Push the '●' button
Select the Option using '▶', '◀' Button :
"on" ~ "oFF" Push the '●' button
Overall defrost mode is set
Mode setting
- on: Operate overall defrost
- off: Operate partial defrost
CAUTION
!
• Ask an authorized technician to setting a function.
Operation Time(Hr)
8 9
6.5 10.5
5 12
8 9
6.5 10.5
5 12
8 9
6.5 10
5 12
Continuous operation
Continuous operation
Continuous operation
Capacity
8~12HP 14~20HP
Noise(dB)
55 59
52 56
49 53
33