TI120 Series Variable Frequency Drive
Fault Diagnosis and Countermeasures
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Fault code
Failure
Display
Fault name
Cause
Countermeasure
Damaged switch power supply
Seek technical support
11
Er.tun
Motor
identification
failure
Motor parameters are not set or
set incorrectly
Setting motor parameters correctly
Motor wiring error
Check motor wiring
12
Er.CCL
Contactor
suction
failure
Abnormal grid input voltage
Check input grid voltage
Contactor damage
Seek technical support
Damaged buffer resistance
Seek technical support
Abnormal switch power supply
Seek technical support
13
Er.EtE
External
terminal fault
Input signal of external fault
through multi-functional
terminal X
Reset
Input signal of external fault
through logic state inversion
IO function
Reset
14
Er.oH1
variable
frequency
drive
overheating
High environment temperature
Reduce environment temperature
Damaged fan
Replace fan
Air duct blockage
Clean air duct
Abnormal temperature
detection
Seek technical support
Damaged variable frequency
drive module
Seek technical support
15
Er.oH2
Motor
overheating
High environment temperature
Reduce environment temperature
Abnormal heat dissipation or
heavy load of motor
Check motor heat dissipation or
reduce load
Damaged temperature
detection circuit
Seek technical support
16
Er.oL1
variable
frequency
drive overload
Low input power supply voltage
Check grid voltage
Quick start in high speed
rotation of motor
Start the motor after stopping
rotating
Long-term weight overload
Shorten overload time and reduce
load
Short acceleration and
deceleration time
Prolong acceleration and
deceleration time