Specifications

Troubleshooting
Siemens Building Technologies, Inc. 81
• For example:
If the SED2 trips on undervoltage and then receives an external trip
before the undervoltage is acknowledged, you will obtain:
Index 0 = 3, undervoltage
Index 1 = 85, external trip
Whenever a fault in index 0 is acknowledged (F1e), the fault history
shifts as indicated in the diagram.
• Indexes:
r0947[0] = Recent fault trip –, fault 1
r0947[1] = Recent fault trip –, fault 2
r0947[2] = Recent fault trip -1, fault 3
r0947[3] = Recent fault trip -1, fault 4
r0947[4] = Recent fault trip -2, fault 5
r0947[5] = Recent fault trip -2, fault 6
r0947[6] = Recent fault trip -3, fault 7
r0947[7] = Recent fault trip -3, fault 8
Index 2 is used only if a second fault occurs before the first fault is
acknowledged.
Resetting Faults
• Press to reset a fault condition manually.
• OK FAULT (r0052, bit 3) is a read-only fault status point (0=OK,
1=Fault). It can be acknowledged with FAULT ACK (r0054, bit 7).
Setting FAULT ACK (r0054, bit 7) resets the fault (1=Reset Fault).
• It is possible that motor performance may be affected at low
frequencies if parameter P1310 falls under 50% (default value).
• It is recommended to make provision to reset faults automatically if
the unit is operated in auto mode.