HKS VFD Drive A2 Series User Manual page 22

A2 VFD
(0.75-30kW)
Display Meaning
OC –u
Acceleration
overcurrency
OC –d
Deceleration
overcurrency
OC –r Steady state
overcurrency
OT –o
Overheat
while stop
OT –u
Overheat
while
acceleration
OT –d
Overheat
while
deceleration
OT –r
Overheat in
steady state
9.2 Other unexpected fault
1、VFD is in normal condition but without any output
1. Internal fuse fail
2. Internal drive module fail
Cause
Small acceleration
time or component
fail
Small deceleration
time or component
fail
overload or
component fail
High environment
temperature or fail
temperature sensor
High environment
temperature, small
acceleration time
High environment
temperature, small
deceleration time
High environment
temperature,
overload
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Diagnosis
Increase acceleration
time
Increase deceleration
time
Check motor load
Check whether air
temperature is over 50,
check CZ55 connection
Check whether air
temperature is over 50,
increase acceleration
time
Check whether air
temperature is over 50,
increase deceleration
time
Check whether air
temperature is over 50,
check overload