Tr
oubleshooting
Page 50
2. General Troubleshooting
2.1 Error Display (Indoor Unit)
When the indoor unit encounters a recognized error, the indicator light will flash in a corresponding series, the timer
display may turn on or begin flashing, and an error code will be displayed. These error codes are described in the
following table:
Indicator
flashes
Timer
Display
Display
Error
Information
Solution
1
OFF
E0
Indoor unit EEPROM parameter error
Page 59
2
OFF
E1
Indoor / outdoor units communication error(only
for MSAFD-21CRN1-QB6W,
MWFOT24S
)
Page 60
3
OFF
E2
Zero-crossing signal detection error
Page 61
4
OFF
E3
The indoor fan speed is operating outside of the normal range
Page 62
5
OFF
E4
Indoor room temperature sensor T1 is in open circuit or
has short circuited
Page 64
6
OFF
E5
Evaporator coil temperature sensor T2 is in open circuit or
has short circuited
Page 64
9
OFF
E7
Indoor PCB /Display board communication error
Page 65
7
OFF
EC
Refrigerant leak detected
Page 66
For other errors:
The display board may show a garbled code or a code undefined by the service manual. Ensure that this code is not a
temperature reading.
Troubleshooting:
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.
