External Fault 1; External Fault 2; External Fault 3 - Siemens SINAMICS S150 Operating Instructions Manual

Diagnosis / faults and alarms
10.3 Overview of warnings and faults
10.3.2

"External fault 1"

Causes
Fault code F7860 ("External Fault 1") is triggered by the following optional protection devices
in the cabinet unit:
● Thermistor motor protection unit shutdown (option L84)
● 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
in "Additional Operating Instructions".
10.3.3

"External fault 2"

Causes
Fault code F7861 "External Fault 2" is triggered when the braking resistor available with
options L61/L62/L64/L65 is subject to thermal overload, thereby activating the thermostat.
The drive is switched off with OFF2.
Remedy
The cause of the braking resistor overload must be eliminated and the fault code
acknowledged.
10.3.4

"External fault 3"

Causes
Fault code F7862 "External fault 3" is triggered when the braking unit fitted for options
L61/L62/L64/L65 triggers a fault. The drive is switched off with OFF2.
Remedy
The cause of the braking unit overload must be eliminated and the fault code acknowledged.
422
Drive converter cabinet units
Operating Instructions, 07/07, A5E00288214A