Siemens SINAMICS PERFECT HARMONY GH150 6SL3826, Operating Instructions Manual

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8.4 Fault and system messages
8.4.1 Indicating and rectifying faults
The drive provides many protection functions. These protection functions protect the drive
against damage in a fault situation. A distinction is made between the following messages:
● Fault
A fault is a message from the drive indicating a fault or other exceptional (unwanted) state.
The cause can be a fault in the drive itself or also an external fault. This fault, for example,
could have been issued by the winding temperature monitoring of the asynchronous motor.
The faults are displayed and can be reported to a higher-level control system. Once you
have eliminated the cause of the fault, you must acknowledge the fault message.
● Alarm
An alarm is the response to a fault condition identified by the drive, that does not result in the
drive being shutdown. Alarms acknowledge themselves. If the cause is no longer present,
the alarms reset themselves automatically.
The drive indicates a fault condition by displaying the corresponding fault and/or alarm on the
HMI. Additional information on the HMI is provided in the HMI Function Manual
8.4.2 Diagnostics via LEDs
8.4.2.1 LEDs of the Power Stack Adapters
Table 8-1 LEDs of the Power Stack Adapters
LED Color Status Description; cause Remedy
PWR - Off 24 V power supply has failed or is too low
(< 14 V) or internal fuse defective.
Check input voltage.
If input voltage is > 18 V and LED off:
Return component for repair.
Red Continuous
light
24 V power supply is available (>14 V);
internal board voltage fault.
Check input voltage.
If input voltage is > 18 V and LED red:
Return component for repair.
Green Continuous
light
24 V power supply OK.
Internal board voltages OK. --
Operation
8.4 Fault and system messages
SINAMICS PERFECT HARMONY GH150 6SL3826
Operating Instructions 05/2020
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