Chapter 9. Error Message Andfault Diagnosis - HKS VFD Drive A2 Series User Manual

A2 VFD
(0.75-30kW)
Chapter 9 Error Message and Fault Diagnosis
9.1 Fault table
Display Meaning
OU –o Overvoltage
OU –u Acceleration
overvoltage
OU –d
Deceleration
overvoltage
OU –r Steady state
Overvoltage
LU –o Stop state
undervoltage
LU–u
Acceleration
undervoltage
LU –d Deceleration
undervoltage
LU –r
Steady state
undervoltage
OC –o Stop state
overcurrency
Cause
Overvoltage of
power source
Overvoltage of
power source
Overvoltage of
power source or
large inertia
Overvoltage of
power source
Undervoltage of
power source
Undervoltage of
power source,
small
acceleration time
Undervoltage of
power source
Undervoltage of
power source or
large inertia
Component fail,
interference
18
Diagnosis
Check voltage of power
source
Check voltage of power
source
Overvoltage of power
source, increase
deceleration time, add
brake components
Check voltage of power
source
Check voltage of power
source
Check voltage of power
source, increase
acceleration time
Check voltage of power
source
Check voltage of power
source, decrease load
Push "RESET".
Component fail if it
happens again.