High Static Pressure Compensation Mode (Fn 2); Night Low Noise Function (Fn 3); Setting The Odu Address (Fn 5) - LG Multi V PRHR042A Installation Manual

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High Static Pressure Compensation mode (Fn 2)

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
Service 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" Push the '●' button
Start the Static pressure compensation mode :
Save the selected option value in EEPROM
FAN Maximum RPM of each step
ARUB***GSS4
System(Ton)
Max.RPM
ARUM***GSS5
System(Ton)
Max.RPM

Night Low Noise Function (Fn 3)

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
Service 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~op15" Push the '●' button
Start the Night low noise function :
Save the selected option value in EEPROM
5
Op1 850
Op2 850
Op3 1000
3,4
Op1 750
Time Settings
Step Judgement Time(Hr)
op1 8
op2 6.5
op3 5
op4 8
op5 6.5
op6 5
op7 8
op8 6.5
op9 5
op10
op11
op12
op13 6.5
op14 6.5
op15 6.5
CAUTION
!
• Request installer to set the function during installation.
• If ODU RPM changes, cooling capacity may go down.

Setting the ODU address (Fn 5)

Mode setting method
Service PCB DIP switch on : No.5
Select the mode using '▶', '◀' Button :
"Func" Push the '●' button
Select the Function using '▶', '◀' Button :
"Fn5" Push the '●' button
Select the Option using '▶', '◀' Button :
"0" ~ "255" Push the '●' button
ODU address is set
CAUTION
!
• Ask an authorized technician to setting a function.
• If use a function, first install a Central controller.
Operation Time(Hr)
9
10.5
12
9
10.5
12
9
10.5
12
continuous operation
continuous operation
continuous operation
10.5
10.5
10.5