Siemens MICROMASTER 411 Operating Instructions Manual page 88

6 Troubleshooting
Load duty cycle must lie within specified limits
Motor power (P0307) must match inverter power (r0206)
A0511 Motor OverTemperature
Possible Causes
Motor overloaded
Load duty cycle too high
Diagnose & Remedy
Independently of the kind of temperature determination check the following:
Load duty cycle must be correct
Motor nominal overtemperatures (P0626-P0628) must be correct
Motor temperature warning level (P0604) must match
If P0601 = 0 or 1, check the following:
Check if name plate data are correct (if not perform quick commissioning)
Accurate equivalent circuit data can be found by performing motor identification (P1910=1)
Check if motor weight (P0344) is reasonable. Change if necessary
Via P0626, P0627, P0628 the standard overtemperatures can be changed, if the motor is not a
Siemens standard motor
If P0601 = 2, check the following:
Check if temperature shown in r0035 is reasonable
Check if the sensor is a KTY84 (other sensors are not supported)
A0522 I2C read out timeout
Possible Causes
The cyclic access to the UCE Values and powerstack temperatures via the I2C bus (MM440 Frame size
FX & GX) is disturbed
A0523 Output fault
Possible Causes
One motor phase is disconnected
A0535 Braking Resistor Hot
Diagnose & Remedy
Increase duty cycle P1237
Increase ramp down time P1121
A0541 Motor Data Identification Active
Possible Causes
Motor data identification (P1910) selected or running
A0542 Speed Control Optimisation Active
Possible Causes
Speed Control Optimisation (P1960) is selected or running
A0590 Encoder feedback loss warning
Possible Causes
Signal from Encoder lost and Inverter has switched to sensorless vector control
Diagnose & Remedy
Stop inverter and then
Check encoder fitted. If encoder not fitted, set P0400 = 0 and select SLVC mode (P1300 = 20 or 22)
If encoder fitted, check correct encoder selected (check encoder set-up in P0400).
Check connections between encoder and inverter
Check encoder not faulty (select P1300 = 0, run at fixed speed, check encoder feedback signal in
r0061)
Increase encoder loss threshold in P0492
88
MICROMASTER 411 & COMBIMASTER 411
Issue 03/01
Operating Instructions
6SE6400-5CA00-0BP0