8.5.2 Diagnostics
8.5.2.1 Diagnostics via LEDs
LEDs of the open-loop and closed-loop control cabinet
Table 8-1 Meaning of indicator lights
Indicator light Action Meaning
H21 White Continuous light The converter is in operation. The circuit breakers are
switched on and the converter pulses are enabled.
White Flashing light
● The converter is starting up. The auxiliaries are
switched on and the circuit breakers are closed.
● The auxiliary circuits and the circuit breakers are
switched on, the converter pulses are disabled.
● Shutdown cycle OFF1, OFF2 or OFF3 is running.
● The demagnetization equipment is in operation (only in
the case of starting converters).
Test mode is selected.
H22 Green Continuous light The converter is ready to start. All circuit breakers are
switched off. OFF2 or OFF3 are not active.
Green Flashing light All circuit breakers are switched off. The converter is, how‐
ever, not ready to start. An OFF2/OFF3 or a fault is active.
H23 Yellow Flashing / contin‐
uous light
Warning
H24 Red Flashing / contin‐
uous light
Fault
If a fault or an alarm becomes active, the lamp flashes for 5 seconds. It then switches to the
continuous light state. If a new message is occurs while the lamp is continuously lit, the lamp
begins to flash again for 5 seconds and then is again continuously lit. The lamp is extinguished
once the cause of the problem has been resolved.
LEDs of the Sirius safety relay
Table 8-2 LEDs of the Sirius safety relay
LED Operation
POWER CHANNEL1 CHANNEL2 Line supply EMERGENCY
STOP
ON Release circuits
☀ ☀ ☀ On Not actuated Actuated Closed
☀ ○ ○ Actuated Not actuated Open
☀ ○ ○ Not actuated Not actuated Open
Fault
Operation
8.5 Fault and system messages
SINAMICS GL150 6SL38555UN113KA0Z
Operating Instructions Rev.201910281450 EXAMPLE 115
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