Chapter 7 Troubleshooting Shenzhen Hpmont Technology Co., Ltd
―126― HD30 Series Inverters User Manual
Fault code Fault name Possible reasons of fault Counter-measures
E0025
PID reference
loss
• Analogue reference signal is
smaller than F20.12
• Analogue input circuit fault
• Please check the connection
• Please seek technical support
E0026 PID feedback loss
• Analogue setting signal is
smaller than F20.14
• Analogue input circuit fault
• Please check the connection
• Please seek technical support
E0027
PID feedback out
of limiting
• Analogue setting signal is
bigger than F20.16
• Analogue input circuit fault
• Please check the connection
• Please seek technical support
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 (F17.00)
and the baud rate (F17.01)
• Send the data according to
MODBUS protocol
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