Bosch Rexroth EFC 3600, Operating Instructions Manual, Page: 128 / 238

9.3 Diagnosis for Power Down/Drop
9.3.1 In Stop State
Displayed message
P.oFF
If the DC bus voltage drops down below a certain value under the following two situa‐
tions, the messages above will show up:
1. Normal power down: this will cause DC bus voltage down below the undervoltage
threshold along with this message.
2. Sudden power drop: this will cause that DC bus voltage drops at first down below
the undervoltage threshold along with this message but then recovers before
CPU voltage dropped to power down level, soft restart will be activated again and
this message will be reset automatically.
9.3.2 In Run State
Displayed message
UE-1
If the DC bus voltage drops down below a certain value under the following two situa‐
tions, the messages above will show up:
1. Normal power down: this will cause DC bus voltage down below the undervoltage
threshold along with this message.
2. Sudden power drop: this will cause that DC bus voltage drops at first down below
the undervoltage threshold along with this message but then recovers before
CPU voltage dropped to power down level, soft restart will be activated again and
this message will be reset automatically.
Bosch Rexroth AG
Diagnosis
DOK-RCON03-EFC-3600***-IT01-EN-P
Rexroth Frequency Converter EFC 3600
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