Page 59
2. General Troubleshoo
�
ng
2.1
Error Display (Indoor Unit)
When the indoor unit encounters a recognized error, the indicator light will
fl
ash in a corresponding series, the
�
mer
display may turn on or begin
fl
ashing, and an error code will be displayed. These error codes are described in the
following table:
Indicator
fl
ashes
Timer
Display
Display
Error Informa
�
on
Solu
�
on
1
OFF
E0
Indoor unit EEPROM parameter error
Page 68
2
OFF
E1
Indoor / outdoor units communica
�
on error (only for 22k
models)
Page 63
3
OFF
E2
Zero-crossing signal detec
�
on error
Page 70
4
OFF
E3
The indoor fan speed is opera
�
ng outside of the normal range
Page 71
5
OFF
E4
Indoor room temperature sensor T1 is in open circuit or
has short circuited
Page 73
6
OFF
E5
Evaporator coil temperature sensor T2 is in open circuit or
has short circuited
Page 73
9
OFF
E7
Indoor PCB /Display board communica
�
on error
Page 74
7
OFF
EC
Refrigerant leak detected
Page 75
3
ON
F2
Condenser coil temperature sensor T3 open circuit or short
circuit (only for 22k models)
Page 73
For other errors:
The display board may show a garbled code or a code unde
fi
ned by the service manual. Ensure that this code is not a
temperature reading.
Troubleshoo
�
ng:
Test the unit using the remote control. If the unit does not respond to the remote, the indoor PCB requires replacement.
If the unit responds, the display board requires replacement.
Tr
o
ub
le
s
h
oo
ti
ng
