Siemens MICROMASTER 420 Reference Manual page 84

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5.1 Troubleshooting with Status Display Panel
Table 5-1 explains the meaning of the various states of the LEDs on the Status
Display Panel (SDP).
Table 5-1
OFF
OFF
ON
ON
OFF
Flashing – R1
Flashing – R1
ON
Flashing – R1
Flashing – R1
Flashing – R1
Flashing – R2
Flashing – R2
Flashing – R2
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5.2 MICROMASTER 420 Fault Codes
In the event of a failure, the inverter switches off and a fault code appears on the
display. See Operating Instructions, Chapter 6, Troubleshooting for an explanation
of these codes.
76
Repairs on equipment may only be carried out by
repair centers
are thoroughly acquainted with all the warnings and operating
procedures contained in this manual.
Any defective parts or components must be replaced using parts
contained in the relevant spare parts list.
Disconnect the power supply before opening the equipment for access.
Inverter conditions indicated by the LEDs on the SDP
OFF
ON
OFF
ON
Flashing – R1
OFF
ON
Flashing – R1
Flashing – R1
Flashing – R1
Flashing – R2
Flashing – R1
Flashing – R2
Flashing – R2
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or by qualified personnel who
1 Mains not present.
8 Inverter fault – other than those listed below.
13 Inverter running.
14 Ready to run – standby.
4 Fault – Overcurrent.
5 Fault – Overvoltage.
7 Fault – Motor Overtemperature.
8 Fault – Inverter Overtemperature.
9 Warning Current Limit (both LEDs flashing at the
same time).
11 Other warning (both LEDs alternate flashing).
6/10 Undervoltage trip/Undervoltage warning.
12 Inverter is not in ready state – display >0.
2 ROM failure (both LEDs flashing at the same
time).
3 RAM failure (both LEDs alternate flashing).
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