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Chapter 7 Fault Diagnosis
112
Failure
No.
Failure
code
Failure
description
Potential causes
Solutions
36
E.dl4
Reserved
Reserved
Reserved
37
E.IoF
Terminal mutual
exclusion check
failed
The functions of X1 to X4, AI1, AI2 terminals are
set in a repeated manner
Modify the settings of X1 to X4,
AI1, AI2 terminals and ensure
the setting functions are not
repeated (excluding null
function)
38
E.oL3
Hardware
overload
protection
Load failure
Check whether motor is blocked
Replace inverter with proper
model
Input failure
Check whether there is phase
loss
Output failure
Check whether there are phase
loss or short circuit
63
−
LU
−
Power under
voltage
The power voltage is lower than the minimum
operating voltage of the equipment
Check input power supply
Abnormal internal switching power supply
Seek for technical support
7.2 Troubleshooting Procedures
START
Seek for technical help
Fault reset
NO
YES
NO
Please shut down the power
supply immediately to avoid
further expansion of the fault
NO
YES
Seek for technical help
Seek for technical help
END
Identify the fault code per 4.4.4" Common
Characters Displayed by LED" AND whether
the fault code can be Identified
Find out the possible reasons and
countermeasures for the failure as per the
above table, and whether this failure is
removed
Serious fault occurs, such as abnormal sound
upon power up and no display
