AC Fan Coil Unit Two-pipe Wall-mounted Series
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12.7.4 E8: Fan motor malfunction
E8: Fan motor malfunction
No
Is the motor fan stuck
Yes
Adjust the IDU fan
No
Is the cable between the main board
and the fan not connected or loose
Yes Properly connect the cable
No
Is the IDU input power abnormal
Yes
Power failure: contact the
power supply sector
No
Between red and
white:310V
Between black and
white:15V
Is the voltage of the main board
terminal CN24 abnormal
No
Fan fault
No
Replace the main board and check
whether the problem is eliminated
No
Yes
The device returns to normal
12.7.5 EE:
Water-level switch malfunction
EE: Water-level alarm malfunction
No
Water-level switch connecting wire
between switch and main board gets
loose
Yes
Reconnect and ensure that the
connection is reliable.
No
There is something wrong with the water-
level switch
Yes Replace switch.
No
Chip fault or chip foot sheds odd or chip is
inverted.(correct mode is semicircular
bent alignment)
Yes
Reinstall chip or install other chip
with same model on the faulty unit to
check whether there is something
wrong with the chip.
No
No
Main board error. For example, getting
wet.
Yes
Replace main board.
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