Lcd display inverter error code

Andrew Lee

4.4  Inverter Output Layout


1.AC output socket

2.AC output connector bar

3.Switch

4.Display screen



1.DC input voltage

2.AC output voltage

3.AC output current

4.AC output frequency

5.Display of fault code

6.Display of machine temperature

 

 

4.4.1: Descriptions of fault code of display screen

 

Fault Code

 

Phenomenon

 

Cause

 

Troubleshooting

 

Bell Ringing

 

Warning  

BL

 

Battery undervoltage

 

Too low battery input voltage

 

Recharge battery

 

Discontinuous cycling after ringing for twice

 

1) Short ringing for every about 3 s approximately: Overtemperature alarming;

2) Short ringing for every 7 s approximately: Overload alarming;

3) Short ringing for every 15 s approximately: Undervoltage alarming;

BO

 

Battery overvoltage

 

Too high battery input voltage

 

Check input power

 

Discontinuous cycling after ringing for three times

SC

 

Output short circuit

 

Output short circuit

 

Check output line and load

 

Discontinuous cycling after ringing for six times

OC

 

Output overcurrent

 

Too large output current, immediate protection

 

Reduce load

 

Discontinuous cycling after ringing for five times

OL

 

Output overload

 

Too large output current, delay protection

 

Reduce load

OH

 

Overtemperature  protection

 

Too high temperature

 

Check fan or air duct

 

Discontinuous cycling after ringing for four times

EO

 

Output line is electrified

 

The AC output terminal is connected with equipment with power by mistake

 

Check if output line is connected with other powers

 

Discontinuous long, medium and short cycles

PN

 

Overvoltage of DC bus

 

Too high DC bus voltage

 

Check input power

 

Discontinuous cycles after ringing for three times

NP

 

Too low bus voltage

 

DC bus undervoltage tripping is detected by startup to prevent a more serious fault

 

Check if post-power tube is short circuited

 

Discontinuous cycles after ringing for seven times

RS

 

Parameter configuration faults

 

Restart after parameter configuration

 

Restart the machine

EP

 

Storage error

 

Chip is used for the first time

RD

 

Data reading error

 

Not initialized

SA

 

Sampling circuit fault

 

Startup self-check error