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Chapter 8 Precautions for Maintenance and Inspection
Operation
Panel
Indication
Name
Possible fault reason
Corrective action
Fb0
Fuse broken
1: The inverter fault
Please contact your
sales representative.
Fb1
Fb2
Fb3
OL0 during
stop
Inverter overload
1: Overload
2: Acceleration time is
too short
3: Torque boost is too
fast
4: V/F curve incorrectly
set
5: Under voltage of
input
6: Before motor stops,
inverter starts up
7: Fluctuation or
blocking in loading
1: Reduce the load
weight or replace larger
capacity inverter.
2: Increase acceleration
time
3: Reduce torque boost
rate
4: Set V/F curve over
again
5: Check input voltage,
increase inverter
capacity
6: Adopt tracing startup
mode
7: Check load condition
OL1
during
acceleration
OL2
during
deceleration
OL3
during
constant
speed
OT0
during stop
Motor overload
1: The motor for use
under overload
2: Acceleration time is
too short
3: Motor protection
setting is too small
4: V/F curve is
incorrectly set
5: Torque boost is too
fast
6: Bad motor insulation
7: Motor setting is too
small
1: Reduce the load
weight.
2: Increase acceleration
time
3: Increase protection
setting
4: Correctly set V/F
curve
5: Reduce torque boost
rate
6: Check motor
insulation and replace
motor
7: Use larger inverter or
motor
OT1 during
acceleration
OT2 during
deceleration
OT3
during
constant
speed
OH0 during
stop
Inverter
overheat
1: Cooling fan broken
2: Heatsink clogging
3: The ambient
temperature is high
1: Replace the cooling
fan.
2: Clean thr heatsink
3: Set the ambient
temperature to within
the specifications.
OH1 during
acceleration
OH2 during
deceleration
OH3
during
constant
speed