10.2.3
Drive-by-wire controller failure
.
(L
E
)
Error Code
LE
Malfunction decision
conditions
1, Electric heating signal or compressor signal is on, but fan signal is
off
2, Electric heating signal and compressor signal are on, but 4-way
valve signal is off
3, Cooling only models have heating signal, or the 4-way valve signal
and compressor signal are on at the same time.
Supposed causes
●
Wiring mistake
●
Faulty
wire controller
●
Wire controller does
n’t match
Troubleshooting:
DIP SWITCH TERMINAL
DESIGNATION
24V CONTROLLER
FC(L)
Front desk control terminal L
FC(N)
Front desk control terminal N
LOW-FAN
Low fan speed
GL
HI-FAN
High fan speed
GH
4-WAY
4-way valve(for heat pump model)
B
HEAT2
Electrical heater 2
W
HEAT1
Electrical heater 1
(W)
COMP
Compressor
Y
24V(N)
24VAC terminal N COM
C
24V(L)
24VAC terminal L
R
www.mideaaircon.com 27
Drive-by-wire controller failure
Check whether the wiring
between controller and dip
switch board is correct
Wire controller doesn
’
t
match, change the wire
controller
Yes
No
reconnection
Electric heating and
compressor are on, but 4-way
valve is off
Yes
Electric heating or compressor
is on, but fan is off
Cooling only models have
heating signal, or the 4-way
valve and compressor signal
are on at the same time.
No
Check whether the wiring
between controller and dip
switch board is correct
Yes
4-way valve is set wrong
Yes
No
reconnection
No
Wire controller is set wrong
Yes
