Thinkvert TI10 Series, User Manual

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User Manual of TI10 Series Variable Frequency Drive
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Chapter 3 Fault Diagnosis and Countermeasures
3.1 Fault List and Countermeasures
The Variable Frequency Drive may encounter the following fault types during use. Please
refer to the list countermeasures for simple troubleshooting.
Fault
code Failure
Display
Fault name Cause Countermeasure
1 Er.oc1
Over-current in
acceleration
Torque boost value is too
large at scalar control
Reduce torque boost value
Great starting frequency
Reduce the starting
frequency value
Short acceleration time Prolong acceleration time
Improper setting of motor
parameters Correct setting of motor
nameplate
Weight overload Reduce overload
Restart the rotating motor
Reduce the current limit
value or start with speed
search
Output interphase short
circuit or short circuit to
ground Check motor wiring and
output impedance to
ground
V/F curve is not suitable at
scalar control
Correct set of V/F curve
2 Er.oc2
Over-current
during
deceleration Short deceleration time Prolong deceleration time
There is no additional brake
unit and brake resistor Add braking unit and
resistance
3 Er.oc3
Over current in
constant speed
Small Variable Frequency
Drive power level
Select the appropriate
Variable Frequency Drive
power
Low grid input voltage Check grid voltage
Weight overload Reduce overload
4 Er.ou1
Over-voltage
during
acceleration Abnormal input voltage Check grid voltage
Short acceleration time Prolong acceleration time
Large load inertia Use energy braking
5 Er.ou2
Over-voltage
during
deceleration Short deceleration time Prolong deceleration time
Abnormal input voltage Check grid voltage
Large load inertia Use energy braking