Operating instructions

04/02 3 Alarms and Warnings
MICROMASTER 420 Parameter List
6SE6400-5BA00-0BP0
135
3 Faults and Alarms
3.1 MICROMASTER 420 fault messages
In the event of a failure, the inverter switches off and a fault code appears on the
display.
NOTE
To reset the fault code, one of three methods listed below can be used:
1. Cycle the power to the drive.
2. Press the
button on the BOP or AOP.
3. Via Digital Input 3 (default setting)
Fault Possible Causes Diagnose & Remedy Reac-
tion
F0001
Overcurrent
Ø Motor power does not correspond
to the inverter power
Ø Motor lead short circuit
Ø Earth fault
Check the following:
1. Motor power (P0307) must correspond to
inverter power (P0206)
2. Cable length limits must not be exceeded
3. Motor cable and motor must have no short-
circuits or earth faults
4. Motor parameters must match the motor in
use
5. Value of stator resistance (P0350) must be
correct
6. Motor must not be obstructed or overloaded
Ø Increase the ramp time
Ø Reduce the boost level
OFF2
F0002
Overvoltage
Ø DC-link voltage (r0026) exceeds
trip level (P2172)
Ø Overvoltage can be caused
either by too high main supply
voltage or if motor is in
regenerative mode
Ø Regenerative mode can be cause
by fast ramp downs or if the
motor is driven from an active
load
Check the following:
1. Supply voltage (P0210) must lie within limits
indicated on rating plate
2. DC-link voltage controller must be enabled
(P1240) and parameterized properly
3. Ramp-down time (P1121) must match inertia
of load
OFF2
F0003
Undervoltage
Ø Main supply failed
Ø Shock load outside specified
limits
Check the following:
1. Supply voltage (P0210) must lie within limits
indicated on rating plate
2. Supply must not be susceptible to temporary
failures or voltage reductions
OFF2
F0004
Inverter Over-
temperature
Ø Ambient temperature outside of
limits,
Ø Fan failure
Check the following:
1. Fan must turn when inverter is running
2. Pulse frequency must be set to default value
3. Air inlet and outlet points are not obstructed
Ambient temperature could be higher than
specified for the inverter
OFF2
F0005
Inverter I
2
t
Ø Inverter overloaded
Ø Duty cycle too demanding
Ø Motor power (P0307) exceeds
inverter power capability (P0206)
Check the following:
1. Load duty cycle must lie within specified
limits
2. Motor power (P0307) must match inverter
power (P0206)
OFF2
F0011
Motor Over-
temperature I
2
t
Ø Motor overloaded
Ø Motor data incorrect
Ø Long time period operating at
low speeds
1. Check motor data
2. Check loading on motor
3. Boost settings too high
(P1310,P1311, P1312)
4. Check parameter for motor thermal time
constant
5. Check parameter for motor I
2
t warning level
OFF1