6 Troubleshooting International English
MICROMASTER 440 Operating instructions
72 6SE6400-5CA00-0BP0
Fault Possible Causes Diagnose & Remedy Reac-
tion
F0070
CB setpoint fault
No setpoint values from CB
(communication board) during telegram
off time
Check CB and communication partner Off2
F0071
USS (BOP-link)
setpoint fault
No setpoint values from USS during
telegram off time
Check USS master Off2
F0072
USS (COMM link)
setpoint fault
No setpoint values from USS during
telegram off time
Check USS master Off2
F0080
ADC lost input
signal
Broken wire
Signal out of limits
Off2
F0085
External Fault
External fault triggered via terminal inputs Disable terminal input for fault trigger. Off2
F0101
Stack Overflow
Software error or processor failure Run self test routines Off2
F0221
PID Feedback
below min. value
PID Feedback below min. value P545. Change value of P545.Adjust feedback gain. Off2
F0222
PID Feedback
above max. value
PID feedback above max. value P544. Change value of P544.Adjust feedback gain. Off2
F0450
BIST Tests Failure
Fault value:
1. Some power section tests have failed
2. Some control board tests have failed
4. Some functional tests have failed
8. Some IO module tests have failed.
(MM 420 only)
16. Internal RAM failed on power-up
check
Drive may run but some features will not work
properly.
Replace drive.
Off2
F0452
Belt Failure
Detected
Load conditions on motor indicate belt
failure or mechanical fault.
Check the following:
1. No breakage, seizure or obstruction of drive train.
2. Proper operation of external speed sensor, if in
use.
3. P0402 (pulse per min at rated speed), P2164
(hysteresis freq. deviation) and P2165 (delay time
for permitted deviation)must have correct values.
4. P2155 (threshold frequency f1), P2157 (threshold
frequency f2)P2159 (threshold frequency
f3)P2174 (upper torque threshold 1)P2175 (lower
torque threshold 1)P2176 (delay T_Torque)P2182
(upper torque threshold 2)P2183 (lower torque
threshold 2)P2184 (upper torque threshold 3) and
P2185 (lower torque threshold 3) must have
correct values.
Off2
F0499
Fault Warning
Separation
Off2
A0501
Current Limit
Motor power does not correspond to the
inverter power
Motor leads are too short
Earth faults
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
Increase the ramp-up-time.
Reduce the boost.
--
A0502
Overvoltage limit
Overvoltage limit is reached.
This warning can occur during ramp
down, if the dc-link controller is disabled
(P1240 = 0).
If this warning is displayed permanently, check drive
input voltage .
--
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