high performance crane special inverter User Manual
Chapter 6 Crane specialinverter faults and troubleshooting 35
Fault
num
ber
Fault
Code
Fault
Description
Possible Causes
Countermeasure
Incorrect setting of motor parameters
in group P9
Please reset the parameters according
to the nameplate parameters on the
motor.
10
E.FAL
Module protection
Output over current
Check whether the motor the output
connection are short circuited, whether
the ground is short circuited and
whether the load is too hea
DC terminal overvoltage
Check the mains power supply and
whether the large inertia load has no
function of quick stop at energy
consumption brake.
Loose connection of connectors
inside the inverter
Ask
professional
technicians
to
maintain
11
E.oH1
Heatsink 1 over
temperature
protection
Ambient over−temperature
Lower the ambient temperature and
strengthen
ventilation
and
heat
dissipation.
Blockage of air duct
Clean the dusts, wools and other
foreign objects in the air duct.
Fan failure
Check if the fan power cable and fan
are normal.
Inverter module failure
Seek for technical support
Temperature detection circuit failure
Seek for technical support
12
E.oH2
Heatsink 2 over
temperature
protection
Ambient over−temperature
Lower the ambient temperature and
strengthen
ventilation
and
heat
dissipation.
Blockage of air duct
Clean the dusts, wools and other
foreign objects in the air duct.
Fan failure
Check if the fan power cable and fan
are normal.
Rectifier module failure
Seek for technical support
Temperature detection circuit failure
Seek for technical support
13
E.oL1
Inverter overload
protection
Input power under voltage
Check input power supply
Fast start−up when motor operates
with high speed
Start again after the motor stop rotating
Keep overloading for a long period of
time
Shorten the overloading time and
reduce load
Too short acceleration or
deceleration time
Prolong the acceleration or
deceleration time
V/F curve ratio is set too large
Adjust V/F curve setting and torque
boost
Power level of inverter is small
Replace to inverter with proper model
14
E.oL2
Motor overload
protection
Input power under voltage
Check input power supply
Motor rotation is blocked or load
mutation occurs
Prevent the motor rotation from
blocking and reduce the load mutation
Summary of Contents for V5 Series
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