TI120 Series Variable Frequency Drive
Fault Diagnosis and Countermeasures
- 139 -
Fault code
Failure
Display
Fault name
Cause
Countermeasure
High setting of V/F curve ratio
Adjust V/F curve setting and torque
lifting amount
Small power selection of
variable frequency drive
Replace the variable frequency
drive with suitable type
17
Er.oL2
Motor overload
Low input power supply voltage
Check grid voltage
Motor stalling or serious load
mutation
Prevent motor stalling and reduce
load mutation
Long-term, low-speed and
heavy-load running of common
motors
Change to variable frequency motor
or increase operating frequency
Short motor overload protection
time
Increase motor overload protection
time
High setting of V/F curve ratio
Adjust V/F curve setting and torque
lifting amount
Large DC brake current setting
Reduce DC braking current
18
Er.ILF
variable
frequency
drive input
Phase loss
Abnormal three-phase input
power supply
Check and eliminate problems in
peripheral circuits
Abnormal driving plate
Seek technical support
Abnormal control plate
Seek technical support
19
Er.oLF
variable
frequency
drive output
Phase loss
Abnormal wiring at output side
of variable frequency drive
Eliminate peripheral faults
Motor three-phase unbalance
Check the motor or replace the
motor
Abnormal driving plate
Seek technical support
Abnormal module
Seek technical support
20
Er.LLd
variable
frequency
drive output
Off load
The operating current of the
variable frequency drive is less
than P30.07
Confirm whether the load is
disengaged or whether the P30.07
and P30.08 parameter settings
conform to the actual operating
conditions.
21
Er.GdF
variable
frequency
drive
Short
Output wiring short circuit to
ground
Check motor wiring and output
impedance to ground
Abnormal motor insulation
Check motor