Displaying Disturbance Messages For The Reactive Power Setpoint - SMA MEDIUM VOLTAGE POWER STATION 500SC-JP System Manual

9 Troubleshooting
Display
AnInFail
ComInvalid
9.3.4.7

Displaying Disturbance Messages for the Reactive Power Setpoint

The instantaneous value Q‑VArModFailStt displays errors or warnings relating to the reactive power setpoint.
Procedure:
1. Log into the user interface (see Section 12.8.1, page 177).
2. Select the instantaneous value Q-VArModFailStt.
Display
Off
OK
ComFail
AnInFail
ComInvalid
132 MVPS22JP-SH-en-11
Cause and corrective measures
The mode WCnstNomAnIn has been selected and the value measured at the analog in-
put is less than 2 mA.
Corrective measures:
• Make sure the cable is correctly connected to the analog input.
The mode WCtlCom has been selected and there is invalid content in the power setpoint
information.
Corrective measures:
• Check the power specification settings.
Cause and corrective measure
No mode for specifying the reactive power setpoint has been selected.
A mode for specifying the reactive power setpoint has been selected and no error is
present.
The mode VArCtlCom or PFCtlCom has been selected and the expected signal with a
valid reactive power setpoint has been absent for at least five minutes.
Corrective measures:
• Ensure that the communication units can be accessed via the Internet.
• Ensure that the communication units are connected correctly.
• Ensure that the cabling between the communication units is ok.
The mode VArCnstNomAnIn or PFCnstAnIn has been selected and the value mea-
sured at the analog input is less than 2 mA.
Corrective measures:
• Make sure the cable is correctly connected to the analog input.
The mode VArCtlCom or PFCtlCom has been selected and there is invalid content in
the power setpoint information.
Corrective measures:
• Check the power specification settings.
SMA Solar Technology AG
System Manual