78
Troubleshooting
2. Controlling trouble
Display of LED
Trouble name
LED6 LED5 LED4 LED3 LED2 LED1
Display of
wired remote
controller
Capacity dial-up of outdoor unit is
wrong
○ ● ● ○
No display
Drive error of outdoor fan / module
protection
○ ○ ● ○ ○
E5
Drive current error of outdoor fan
○ ○ ● ○
E5
Drive voltage protection of outdoor
fan
○ ○ ● ○ ●
E5
Module overheating protection of
outdoor fan
○ ○ ● ● ○
E5
Motor overheating protection of
outdoor fan
○ ○ ● ● ●
E5
Overvoltage protection/DC input
voltage too high
○ ○ ○ ○ ○
E5
Air cooling fin/IPM module/PFC
module temperature too high
○ ○ ○ ○
E5
Current sensor fault /current
detection circuit fault
○ ○ ○ ○
E5
Air cooling fin/IPM module/PFC
module temp. sensor fault
○ ○ ○ ○
E5
Compressor overcurrent /
compressor current protection
○ ○ ○
E5
Undervoltage protection / DC input
voltage too low
○ ○ ○
E5
Failed to start
○ ● ○ ○ ○
E5
PFC abnormality
○ ● ○ ○ ●
E5
Compressor clogged
○ ● ○ ○
E5
Drive module reset / IPM module
reset
○ ● ○ ● ○
E5
Open phase, tripping
○ ● ○ ●
E5
Fault from variable frequency drive
to main control communication
○ ○ ● ● ●
E5
IPM abnormality/IPM module
protection
○ ○ ○ ○
E5
Overspeed protection
○ ○ ○ ●
E5
Sensor connection protection
○ ○ ○
E5
Temperature drift protection
○ ○ ● ○
E5
AC contactor protection
○ ○ ● ●
E5
Overcurrent or drive system
abnormality / compressor overload
protection
○ ● ● ●
E5
AC overcurrent protection (input
side)
○ ○ ○ ●
E5
Driver board environment
temperature sensor error
○ ○ ● ○
E5
Legend: bright ○; dark ●;blink
4. Communication trouble
Display of LED
Trouble name
LED6 LED5 LED4 LED3 LED2 LED1
Display of
wired remote
controller
Communication error between
submodule and the master board
○ ● ●
E6 displayed on
indoor unit under
adaptor board failing
to communicate with
the master board