3.Manual and Auto-reset Faults
INDICATION CONTENT POSSIBLE CAUSE COUNTERMEASURE
1. Motor coil short-circuit with
Transient overcurrent external casing 1. Examine motor
OCS at start 2. Motor connection wire 2. Examine wiring
short-circuit with grounding 3. Replace transistor module
3. Transistor module damaged
1. Acceleration time setting too short
1. Adjust acceleration time to
Overcurrent 2. Improper V/F function selection
longer setting
OCA
at acceleration 3. Applied motor capacity
2. Adjust to a proper V/F curve
exceeds AC drive capacity
3. Replace and install another AC drive
with appropriate capacity
Overcurrent at
1. Transient change in load 1. Examine the loading configuration
OCC
steady speed
2. Transient change in power supply 2. Install inductor on power supply
input side
OCd
Overcurrent at Deceleration setting too short Adjust to a longer acceleration time
deceleration
OCb
Overcurrent DC Braking frequency, braking voltage, Adjust to reduce settings of DC Braking
at braking or braking time setting too long F_15, F_16,or F_17
1. Deceleration time setting
1. Adjust to a longer
Overvoltage at
too short or inertial loading too large
deceleration time
OVC operation/deceleration
2. Power supply voltage
2. Install a inductor on the power
variation too large
supply input side
3. Increase the capacity of AC drive
1. Improve power source quality
1. Power supply voltage too low
2. Adjust to use a longer
LVC Insufficient voltage
2. Power supply voltage
acceleration time
level at operation
variation too large
3. Increase capacity of AC drive
4. Install a reactor on the power
supply input side
Heat-sink over
1. Loading too heavy 1. Examine the load
OHC
heated at operation
2. Ambient temperature too 2. Increase capacity of AC drive
high or poor ventilation 3. Improve ventilation
50
FLUXMASTER 50 INSTRUCTION MANUAL
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