Troubles And Solutions - LG L5UC728FA0 Installation Manual

External Static Pressure & Air Flow (For 48K BE Chassis Model)
Static Pressure(mm Aq)
Model Name
LMNH/C486BEA0
1) The above table shows the correlation of External Static Pressure & AIR FLOW.
2) Duct work must be designed within the range of
3) Change the connection of the indoor fan motor connector to increase the moror speed to dbtain
similar CFM at 15mmAq stastic pressure.
4) If duct work is designed under
applying air damper.
Checking the Power Cord (For 48K BE Chassis Model)
If the main cable for power supply is connected incorrect or wrong, it shall cause strange noise
from the compressor and cooling operation does not work.

Troubles and Solutions

Troubles
➲
Occurrence of strange noise from
compressor
➲
No variation of pressure gages.
Outdoor unit circuit
Outdoor Unit
0
Step CMM CMM
High 48.5 46.5
Med 43 41.5
Low 39 37.5
External Static Pressure, adjust the External Static Pressure
R S T N
Terminal
block
change
Optional Operation - Duct Types
2 4 6
CMM CMM
45 43.5
39.5 38
36 34.5
on installing the unit.
Solutions
➲
Change the R,S wires to the terminal
block.
Power Supply Cable
8 10 15
CMM CMM CMM
42 40 40
36.5 35 35
33 31 30
building
R S T
N
Installation Manual 53