Siemens SINUMERIK 840D sl Series Diagnostics Manual page 724

Overview of Alarms
230036 <location>Power module: Overtemperature electronics unit
Reaction: OFF1 (OFF2)
Acknowledge: IMMEDIATELY
Cause: Power module temperature in the module slot of the drive converter has exceeded the
permissible limit value.
- insufficient cooling, fan failure.
- overload
- ambient temperature too high.
Fault value (r0949):
Temperature [1 bit = 0.01 °C].
Remedy: - check whether the fan is running.
- check the fan elements
- check whether the ambient temperature is in the permissible range.
Notice:
This fault can only be acknowledged after this alarm threshold for alarm A05003 has been
fallen below.
230037 <location>Power module: Overtemperature rectifier
Reaction: OFF2
Acknowledge: IMMEDIATELY
Cause: Power module rectifier temperature has exceeded the permissible limit value.
- insufficient cooling, fan failure.
- overload
- ambient temperature too high.
- line supply phase failure.
Fault value (r0949):
Temperature [1 bit = 0.01 °C].
Remedy: - check whether the fan is running.
- check the fan elements
- check whether the ambient temperature is in the permissible range.
- check the motor load.
- check the line supply phases.
Notice:
This fault can only be acknowledged after this alarm threshold for alarm A05004 has been
fallen below.
230040 <location>Power module: Undervoltage 24 V
Reaction: OFF2
Acknowledge: POWER ON
Cause: Failure of the 24 V power supply for the power module.
- the 16 V threshold was fallen below for longer than 3 ms.
Fault value (r0949):
24 V voltage [1 bit = 0.1 V].
The following applies for PSA XM and PSA GL:
Failure of the 24 V power supply for the power module.
- the set lower threshold for the 24 V power supply voltage (default setting 18 V) was fallen
below.
Remedy: Check the 24 V DC voltage supply to power module.
230041 <location>Power module: Undervoltage 24 V alarm
Reaction: NONE
Acknowledge: NONE
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SINUMERIK 840D sl/840D/840Di/810D Diagnostics Guide (DA), 08/2005 Edition
© Siemens AG, 2005. All rights reserved
08/2005