62 User Manual THEIA HE-t String Inverters 357115.013, Issue 1.0, 2011 March
7. Troubleshooting
This chapter contains useful information if the inverter malfunctions during start-up or
operation. Start by checking that the installation is carried out correctly, and then check the
information in 7.2. Table of Events for possible solutions. If this does not help solve the
problem, please contact the system installer.
7.1. Check List by Failure
If the inverter does not feed power to the grid, try to solve the problem by checking:
That all connection points in the system are properly tightened.
That both the AC circuit breaker(s) and DC switch(es) are ON.
That the irradiation is sufficient to generate power (> 7 W).
That the operation mode of the LEDs is normal (See 6.1. LED).
That there are no warnings or alarms in the display (See 7.2. Table of Events).
That the values of the PV voltage, current and power match those in the display.
If all these items are OK, and there is still no power fed to the grid, please contact the system
installer.
7.2. Table of Events
The inverter automatically identifies operational issues and displays the messages on the
screen. Detailed information about warnings and alarms can be found in the Event Log menu.
See 6.2.6. Event Log.
Messages that can appear in the display:
W = Warning
A = Alarm
Table 7.1: Description of messages appearing in the display during inverter failure
Display Message Description Action
Panel fault (W/A) PV module failure - Contact the module supplier*
Input circuit breaker open
(A)
DC switch(es) is open - Turn ON the DC switch(es)*
- If already ON, contact the system
installer
Inverter failure (W/A) Inverter failure
*
Output circuit breaker open
(A)
AC circuit breaker(s) is
open
- Turn ON the AC circuit
breaker(s)*
- If already ON, contact the system
installer
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