Vacuum Mode - LG ARUN Series Service Manual

4.11 Vacuum Mode

This function is used for creating vacuum in the system after compressor replacement, ODU parts replacement
or IDU addition/replacement.
Vacuum mode setting method
Main PCB
SW01S
Main PCB
Master Main PCB D/W ON ( No.11,14)
SW02B
Main PCB
Press the black button Main PCB (5 sec.)
SW01V
Caution
ODU operation stops during vacuum mode. Compressor can't operate.
4.12 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.
I Static pressure compensation dip S/W setting method
High static pressure mode (Max. RPM 930) : Master ODU Main PCB SW02B NO.13 Dip S/W
Low static pressure mode (Max. RPM 900) : Master ODU Main PCB SW02B NO.12 Dip S/W
Static pressure compensation mode setting
Dip SW setting
High static pressure:No. 13
Low static pressure:No.12
Power Reset
Static pressure compensation mode is set
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Only for training and service purposes
ODU power reset
Vacuum mode setting
ODU V/V OPEN
Main Lev, SC Lev OPEN
IDU Lev OPEN
method
Vacuum mode cancellation method
Master Main PCB D/W OFF( No.11,14)
Static pressure compensation mode cancellation
Dip SW OFF
Power Reset
Static pressure compensation mode is cancelled
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Function
Power Reset
Vacuum Mode cancellation
method
LGE Internal Use Only