SMA SC 500CP XT - Manual (Page 76)

Procedure:
1. Log into the user interface (see Section 9.4.1, page 81).
2. Select the instantaneous value P-WModFailStt.
Display Cause and corrective measures
Off No mode for active power limitation has been selected.
OK A mode for active power limitation has been selected and no error is present.
ComFail The mode WCtlCom has been selected and the expected signal with a valid active
power limitation 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.
AnInFail 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.
ComInvalid The mode WCtlCom has been selected and there is invalid content in the power setpoint
information.
Corrective measures:
• Check the power specification settings.
7.5.7 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 9.4.1, page 81).
2. Select the instantaneous value Q-VArModFailStt.
Display Cause and corrective measure
Off No mode for specifying the reactive power setpoint has been selected.
OK A mode for specifying the reactive power setpoint has been selected and no error is
present.
ComFail 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.
7 Troubleshooting SMA Solar Technology AG
User Manual SCCPXT-BA-E4-en-54 76