Siemens Micromaster 440 Operating Instructions Manual page 100

6 Troubleshooting
A0511 Motor OverTemperature
Possible Causes
! Motor overloaded
! Load duty cycle too high
Diagnose & Remedy
Independently of the kind of temperature determination check the following:
1. Load duty cycle must be correct
2. Motor nominal overtemperatures (P0626-P0628) must be correct
3. Motor temperature warning level (P0604) must match
If P0601 = 0 or 1, check the following:
1. Check if name plate data are correct (if not perform quick commissioning)
2. Accurate equivalent circuit data can be found by performing motor identification (P1910=1)
3. Check if motor weight (P0344) is reasonable. Change if necessary
4. 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:
1. Check if temperature shown in r0035 is reasonable
2. 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
1. Increase duty cycle P1237
2. 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
100
MICROMASTER 440 Operating Instructions
6SE6400-5AW00-0BP0
Issue 12/02