Static Pressure Compensation Function (Fn2) - LG Multi V5 Service Manual

Static Pressure Compensation
Function (Fn2)
Static Pressure Compensation function modifies the maximum
outdoor unit fan speed during normal system operation. Use the
function to raise the maximum outdoor unit fan speed to compensate
for an obstruction (duct) in airflow.
The default outdoor fan external static pressure rating for Multi V 5
Outdoor Units is 0.16 in-wg. Selecting "op3" raises the fan speed to
produce the same airflow at 0.32 in-wg.
Refer to the Multi V Engineering Manuals for the default static
pressure rating, and the maximum static pressure rating with this
function engaged.
For use on both heat pump and heat recovery systems.
• Ask a trained LG service provider to set this function during system
installation.
• If the outdoor unit RPM is changed, cooling capacity could be
reduced.
Table 24: Setting Static Pressure Compensation Function.
Settings Nominal 6 Ton (RPM)
oFF (Default)
op1
op2
op3
ESP (in-wg)
730 0.16
760 0.23
780 0.27
880 0.32
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.
OTHER CONTROLS
Figure 12: Setting the Static Pressure Compensation Function.
Turn No. 5 on the master outdoor unit PCB
DIP switch bank SW01 to ON.
Select from "oFF", "op1" through "op3" options (see table) by using the
Press the SW01D Reset Button one (1) time to reset PCB.
The selected option value is saved in the EEPROM.
Nominal 8 to 20 Ton (RPM)
950
1,020
1,050
1,130
Setting Optional Modes
ESP (in-wg)
0.16
0.23
0.27
0.32
65