7
7
.
.
T
T
R
R
O
O
U
U
B
B
L
L
E
E
S
S
H
H
O
O
O
O
T
T
I
I
N
N
G
G
DC INVERTER AIR CONDITIONER TECHNICAL& SERVICE MANUAL V3.3
114
LED ON
LED OFF
1 time flash
1.0sec
1.0sec
LED ON
LED OFF
1 time flash
0.5sec 0.5sec
For example，fault code 4： Indicator light flash 4 times1-second short LED on/off Intervals for a period of
time again, reports No. 4 fault.
LED ON
LED OFF
3.0sec
For example，fault code 11： Indicator light flash 2 times 2-seconds long LED on/off and 1 time 1-second
long LED on/off Intervals for a period of time again, reports No. 11 fault.
LED ON
LED OFF
3.0sec
Sheet 6 Driver Error Code
------Only for 20K&16 Dual types
Fault
code
Fault Description
Possible Reason of Abnormality
How to Deal With
1
Inverter DC voltage overload fault
1、
Power supply input too high
or too low;
2、
Driver board fault.
1,Check power supply
2,Change driver board.
2
Inverter DC low voltage fault
3
Inverter AC current overload fault
4
Out-of-step detection
1、Compressor phase lost；
2、Bad driver board components；
3、The compressor insulation fault
1,Check compressor wire
connect；
2,Change driver board；
3,Change compressor.
5
Loss phase detection fault (speed
pulsation)
6
Loss phase detection fault (current
imbalance)
7
Inverter IPM fault (edge)
1、
System overload or current
overload;
2,Driver board fault.
3,Compressor oil shortage,
serious wear of crankshaft
4、The compressor insulation fault
1、Check the system .
2、Change driver board;
3、Change the compressor;
4、Change the compressor.
8
Inverter IPM fault (level)
9
PFC_IPM IPM fault (edge)
10
PFC_IPM IPM fault (level)
11
PFC power detection of failure
1、The power supply is not stable ;
2、The instantaneous power
failure ;
3、Driver board failure.
1、Check the power supply.
2、Not abnormal.
3、Change the driver
board.
12
PFC overload current detection of
failure.
1、
System overload, current too
high；
1、Check the system;
2、Change the driver
