Event 177 – Converter DC Precharge Voltage High

Event Description

The measured DC precharge voltage (DC bus voltage) is higher than the expected or achievable system voltage. The converter may not be able to connect to such a voltage.

This event is usually tiggered after a timeout, which is determined by the application and the mode of the application.
To avoid high inrush currents, the application prevents the switching of the DC Link to the DC bus, if this error occurs.
The error is triggered by the converter control unit, which is part of the Power Electronic Unit.

Error view

Symbolic view

Elements of the Event page

Elements of an Event page: Event type, QR-Code, event number and event symbol or text. — *Elements of an Event page: Event type, QR-Code, event number and event symbol or text*

Event symbol	Consequences of the event
Error event	When an error event occurs, the monitored value has reached its error limit. Error events shutdown the generator
Warning event	When a warning event occurs, the monitored value has reached its warning limit. Warning Events don’t shutdown the generator
Information event	An Information event is for information purpose only and has no effect on the generator operation

Device that triggers this event:

Converter Control Unit (part of the Power Electronic Unit)

Warning	No
Error	Yes

Safety instructions

These symbols are used to warn of the possibility of personal injury of lethal danger during certain maintenance work or operations. See Users Manual for Safety Information and complete operating information. Read these instructions carefully. For further information click on the corresponding symbol. Each link opens a new tab.

MANDATORY INSTRUCTION: Observe the instructions in the manual

Causes and solutions

Common causes	Possible solutions
Measurement lines in the power electronics are not connected, mixed up or defective.	Check the measurement lines for correct connection and for defects.
A higher system or battery voltage was connected to the converter DC connectors.	Pay attention to correct system and battery voltage.
A wrong DC voltage parameter is set in the user settings.	Check the DC voltage parameters in the user settings for correct values.

Distributors and Services

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