Overview Of Warnings And Faults; External Alarm 1 - Siemens SINAMICS S150 Operating Instructions Manual

10.3

Overview of warnings and faults

If a fault occurs, the drive indicates the fault and/or alarm. Faults and alarms are listed in a
fault/alarm list, together with the following information:
● Fault/alarm number
● Standard drive response
● Description of the possible cause of the fault/alarm
● Description of the procedure for rectifying the problem
● Standard fault acknowledgement after it has been rectified
10.3.1

"External alarm 1"

Causes
Alarm A7850 ("External alarm 1") is triggered by the following optional protection devices in
the cabinet unit:
● Thermistor motor protection unit alarm (option L83)
● PT100 Evaluation Unit (Option L86)
Remedy
When a fault is indicated, the following procedure is recommended:
1. Identify the cause by examining the specified devices (display or LEDs).
2. Check the fault display on the relevant protection device and establish the fault.
3. Rectify the displayed fault with the help of the appropriate operating instructions provided
Drive converter cabinet units
Operating Instructions, 07/07, A5E00288214A
Note
The list of faults and alarms is contained on the documentation CD.
It also contains descriptions of the responses (OFF1, OFF2, etc.).
in "Additional Operating Instructions".
Diagnosis / faults and alarms
10.3 Overview of warnings and faults
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