Chapter VI Fault Diagnosis and CountermeasuresHigh-performance Universal Inverter User Manual
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hitch
code
Fault name
Troubleshooting
Troubleshooting
countermeasures
Err30
(LL)
Overload failure
1. The operating current of the frequency
converter is less than the set parameters
1. Check whether the load is detached
2. Whether the parameter setting
conforms to the actual operating
conditions
Err31
(PIdE)
PID feedback
disconnection
1. The PID feedback signal is disconnected
2. The PID feedback loss detection value
setting is not reasonable
1. Check the PID feedback signal
2. Check the reasonable value of PID
feedback loss setting
Err40
(oL 4)
Fast current
limiting fault
1. Whether the load is too large or motor
blockage
2. The inverter type selection is too small
1. Reduce the load and check the
motor and mechanical conditions
2. Choose the frequency converter
with a larger power level
Err42
(dEU)
The speed
deviation is too
large
1. No parameter identification was performed
2. The detection parameters of excessive speed
deviation are unreasonable
3. Overload or blocked rotation
1. Motor parameter identification
2.
Speed
deviation
detection
parameters are reasonably reset
3. Check the load to ensure that the
load is normal
Err 48
(oL3)
Electronic overload
failure
The inverter overreports the fault according to
the setting value of the electronic overload
parameter
Check the load or adjust the
electronic overload value reasonably
Err51
(Sto)
Initial position
alignment fault
1. Motor parameters are set up unreasonable
2. No parameter identification was made
3. The motor wire is not well connected
1. Set the motor parameters and
identify the motor parameters
2. Identify the motor parameters
3. Check the motor wiring to ensure
the normal operation
Err60
(bCE)
Brake pipe
protection fault
Short circuit to brake resistance or abnormal
brake module
Check the brake resistance or seek
technical support
P-Lu
The power supply
is under pressure
The inverter power supply voltage is
insufficient
frequency converter internal switch power
supply or bus detection fault
The motherboard power segment or voltage
segment does not match with the current
power supply
Check the power supply of the
frequency converter
Check the internal power or bus
circuit
Check if the rated voltage matches for
support
