Chapter 7 Troubleshooting Shenzhen Hpmont Technology Co., Ltd
―114― HD30 Series Inverters User Manual
Fault code
Fault name Possible reasons of fault Counter-measures
voltage
• Analogue input circuit fault
Mark: E0022 doesn’t affect the inverter normal operation.
Fault code
Fault name Possible reasons of fault Counter-measures
E0028
SCI
communication
time-out
• Connection fault of
Communication cable
• Disconnected or not well
connected
• Please check the connection
E0029
SCI
communication
error
• Connection fault of
Communication cable
• Disconnected or not well
connected
• Communication setting error
• Communication data error
• Please check the connection
• Please check the connection
• Please correctly set the
communication format and the
baud rate
• Send the data according to
MODBUS protocol