Technical Information
ƳƵ
No
Name of
malfunction
Indoor unit display method
Outdoor uniot display (LED have 3
status)
OFF
ON
Blinks
AC Status
Malfunctions
Double
8 code
display
Indicator display (LED blinks
0.5s-ON/0.5s-OFF)
Only for the mode with this function
Running
LED
Cooling
LED
Heating
LED
D40/
D5
D41/
D6
D42/
D16
D43/
D30
25
Compressor lose
steps
H7
3s off
blink
seven
times
Cooling, dehumidifying;
compressor stops
running, indoor fan motor
works. Heating: all will
stop running
Please refer to troubleshooting
26
Heating,
anti-high temp.
declines
H0
3s off
blink 10
times
Overload normal works,
compressor running,
frequency declines
Please refer to troubleshooting
27
Start up fail
Lc
3s off
blink 11
times
Cooling, dehumidifying;
compressor stops
running, indoor fan motor
works. Heating: all will
stop running
Please refer to troubleshooting
28
Compressor
current testing
circuit
malfunction
U1
3s off
blink 13
times
Cooling, dehumidifying;
compressor stops
running, indoor fan motor
works. Heating: all will
stop running
Replace the outdoor control
board AP1
29
EEPROM
malfunction
EE
3s off
blink 15
times
Cooling, dehumidifying;
compressor stops
running, indoor fan motor
works. Heating: all will
stop running
Replace the outdoor control
board AP1
30
Capacitor charge
malfunction
PU
3s off
blink 17
times
Cooling, dehumidifying;
compressor stops
running, indoor fan motor
works. Heating: all will
stop running
Please refer to Part 3 capacitor
charging fault of troubleshoot-
ing
31
Module sensor
circuit diagram
P7
3s off
blink 18
times
Cooling, dehumidifying;
compressor stops
running, indoor fan motor
works. Heating: all will
stop running
Replace the outdoor control
board AP1
32
Module temp.
over high
protection
P8
3s off
blink 19
times
Cooling, dehumidifying;
compressor stops
running, indoor fan motor
works. Heating: all will
stop running
To check whether the ambient
temp. of IPM is too high or the
heat-sinhing of IPM is dirty else
replace the outdoor board AP1
33
DC Bus voltage
dips
U3
3s off
blink 20
times
Cooling, dehumidifying;
compressor stops
running, indoor fan motor
works. Heating: all will
stop running
Power voltage is not stable
34
Low DC Bus
voltage
protection
PL
3s off
blink 21
times
Cooling, dehumidifying;
compressor stops
running, indoor fan motor
works. Heating: all will
stop running
1. Check the input voltage if
the voltage is lower than
150VAC, restart the machine
when the power supply is
normal.
2. Check the reactor L
connection.
35
IPM temp. is too
high limit/
decrease
frequency
EU
Overload normal works,
compressor running,
frequency declines
Whole unit break for 20 mins
and discharge, to check the
outdoor control board AP1’s
IPM module coolant whether is
short, the radiator is tightened.
If above phenomenom is not
OK, please improve or replace
the control board AP1
36
Four-way valve
abnormal
U7
This malfunction
happened, only in heating
mode, all will stop running
1. Power supply voltage is
lower than AC175V
2. Wire terminal 4V loosen or
wire break
3. 4V damaged, replace 4V
37
Outdoor unit
zero-cross
detecting error
Cooling: compressor will
stop, indoor fan motor
works. Heating: all will
stop
Replace the outdoor control
board AP1
38
Outdoor DC
fan motor
malfunction
L3
Outdoor DC fan motor
malfunction lead
to compressor stop
operation
DC fan motor malfunction or
system blocked or the connec-
tor loosed