Siemens SINUMERIK 840D sl Series Diagnostics Manual page 721

08/2005
230021 <location>Power module: Ground fault
Reaction: OFF2
Acknowledge: IMMEDIATELY
Cause: Power module has detected a ground fault.
- ground fault in the power cables
- winding fault or ground fault at the motor.
- CT defective.
Fault value (r0949, decimal):
Absolute value, summed current [32767 = 271 % rated current].
Remedy: - check the power cable connections.
- check the motor.
- check the CT.
See also: p0287
230022 <location>Power module: Monitoring U_ce
Reaction: OFF2
Acknowledge: POWER ON
Cause: In the power module, the monitoring of the collector-emitter voltage (V_ce) of the
semiconductor has responded. Possible causes:
- short-circuit at the motor module output.
- defective semiconductor in the power module.
Fault value (r0949, binary):
Bit 0: Short-circuit in phase U
Bit 1: Short-circuit in phase V
Bit 2: Short-circuit in phase W
Bit 3: Light transmitter enable defective
Bit 4: V_ce group fault signal interrupted
See also: r0949
Remedy: - check the power cable connections.
- select the defective semiconductor and replace.
230025 <location>Power module: Overtemperature chip
Reaction: OFF2
Acknowledge: IMMEDIATELY
Cause: Chip temperature of the semiconductor has exceeded the permissible limit value.
- the permissible load duty cycle was not maintained.
- insufficient cooling, fan failure.
- overload
- ambient temperature too high.
- pulse frequency too high.
Fault value (r0949):
Temperature difference between the heatsink and chip [1 Bit = 0.01 °C].
Remedy: - adapt the load duty cycle.
- check whether the fan is running.
- check the fan elements
- check whether the ambient temperature is in the permissible range.
- check the motor load.
- reduce the pulse frequency if this is higher than the rated pulse frequency.
Notice:
This fault can only be acknowledged after this alarm threshold for alarm A05001 has been
fallen below.
See also: r0037
230027 <location>Power module: Precharging DC link monitoring
Reaction: OFF2
Acknowledge: IMMEDIATELY
© Siemens AG, 2005. All rights reserved
SINUMERIK 840D sl/840D/840Di/810D Diagnostics Guide (DA), 08/2005 Edition
Overview of Alarms
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