Excessive Capacity Of Indoor Units - LG multi V PLUS Service Manual

Self-diagnosis function
Fault diagnosis and Trouble shooting guide
Error
Error Item
Display No.
Excessive capacity of
indoor units
51
Trouble shooting Flow
Does the main unit recognize
all sub unit? Check at the initial
setting display mode
Communication cables are
Connected between outdoor units?
Are the numbers of sub units
set as 1, 2, and 3, respectively?
Do LED5's of all
sub unit blink?
Check communication lines
276 Trouble Shooting Guide
Meaning
Excessive connection
of indoor units
compared to capacity
of outdoor unit
No
Yes
Yes
Yes
of indoor units
Major Error Occurrence Cause
• Excessive connection of indoor units
compared to capacity of outdoor unit
• Wrong setting of sub unit
• Communication cables are not connected
between outdoor units
• Poor communication between outdoor units
Yes
Check the sum of indoor unit capacities
or check the connected model
No
No
Modify settings of sub units
No
• If no LED5 of sub units blinks,
replace the PCB of main unit.
• If some LED5's of sub units don't
blink, replace the PCB of
corresponding sub unit.
Modify wiring