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Failure
Failure
No.
code
description
Motor overload
14
E.oL2
protection
Peripheral
15
E.oUt
protection
Arrive user setting
16
E.ot1
continuous
running time
Arrive User
17
E.ot2
summation
running time
Current detection
19
E.CUr
Output to ground
20
E.GdF
short circuit
Abnormal power
21
E.LV1
failure during
Input power
22
E.ILF
Abnormal output
23
E.oLF
phase loss
E5−H High Performance Universal Inverter
Failure
Input power under voltage
Motor rotation is blocked or load mutation
occurs
Common motor maintains running under heavy
load for a long period of time
Motor overload protection time is set too small
Too big V/F curve ratio
DC braking current is set too high
External failure terminal enable
Stall over voltage or over current and the time
lasts for more than one minute
The inverter running time exceeds user setting
continuous running time
The inverter running time exceeds user setting
summation running time
Current detection circuit failure
fault
Wrong connection
Motor failure
Invert module failure
Too big ground-leakage current at the inverter
output side
Mains power fluctuation or momentary power
failure
running
Abnormal connection, missing connection or
disconnection at the power terminal of the
inverter
failure
Serious imbalance of input power at three
phases
Burning of capacitor of the inverter
The soft-start circuit of the inverter is faulty
Abnormal connection, missing connection or
disconnection at the output side of the inverter
Imbalance of output three phases
Chapter 7 Fault Diagnosis
Potential causes
User Manual
Solutions
Check input power supply
Prevent the motor rotation from
blocking and reduce the load
mutation
Replace the common motor with
variable frequency motor or
improve the running frequency
Increase the motor overload
protection time
Adjust V/F curve setting and
torque increment
Reduce the DC brake current
Check the external failure
terminal status
Check whether the external load
is normal
Find the technician who setting
this papameter
Find the technician who setting
this papameter
Seek for technical support
Correct the connection error as
per the user's manual
Replace the motor after
performing ground insulation test
Seek for technical support
Seek for technical support
Check the local mains power
Check the power connections as
per the operational regulations
and eliminate the errors of
missing connection and
disconnection
Check whether the imbalance of
input power at three phases
comply with the requirements
Seek for technical support
Seek for technical support
Check the power connections at
the output side of the inverter as
per the operational regulations
and eliminate the errors of
missing connection and
disconnection
Check whether motor is kept well
Shut down the power supply to
check whether the terminal
characteristics both at the output
side and DC side of the inverter
are consistent
109
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