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Table 6-1 Fault Diagnosis and Troubleshooting
Fault
code
Fault descriptions Possible reasons Actions
E-23 Parameter copy fault
Upload fault of the driver
parameter to operation panel
Check wiring of operation
panel
Download fault of parameter
from operation panel to the
driver
Check wiring of operation
panel
Parameter download without
upload in advance
Upload parameters rst, then
download
E-24
PID feedback
disconnecting
PID feedback wire is loosen Check feedback wiring
Feedback value lower than
disconnection detection value
Adjust detection input
threshold
E-25
Voltage feedback
disconnecting
Feedback value lower than
disconnection detection value
Adjust detection input
threshold
E-26
Arrival of operation
limit time
Arrival of operation limit time Seek help from agent
E-27
Co-processor
communication
fault
reserved reserved
E-28
Encoder
disconnecting
reserved reserved
E-29
Large deviation of
speed
reserved reserved
E-30 Overspeed fault reserved reserved
E-31 reserved reserved reserved
E-32
water shortage
protection
water shortage protection
check if water pressure is under
normal range
6.1 Fault information and Troubleshooting
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