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Front Panel Display Screens and What They Mean
975-0253-01-01 5–7
Fault Mode
When a fault state is detected, the appropriate fault message appears on the front
panel display at the next screen refresh (i.e., within 2 seconds). The GT Inverter
fault message screens are shown in Table 5-8.
Fault Mode causes These message screens only appear when there is a fault, and then flash
alternately with the Inverter Offline default screen (Table 5-5) until the fault is
corrected.
Table 5-8
Fault Message Screens
Display Description
DC Voltage Fault
145.5V
When the actual DC voltage is over or under the allowable
range, 165 to 600 Vdc. Self-clearing, no action required.
The PV array should be configured such that DC voltage
does not fall below 195 Vdc or rise above 600 Vdc.*
* It is normal to receive this fault during low light conditions at dawn or dusk. At
such times, the array does not have sufficient energy to power the inverter, so
the PV voltage drops below 165 volts occasionally.
AC Voltage Fault
280V
When the actual AC voltage is over or under the allowable
range, as specified in “Output” on page A–2.
This is a utility fault; it will clear itself when the AC voltage
comes within the specified range.†
† Grid fault. When this fault is cleared the protection timer will begin its
countdown and you will see the “Reconnecting in sss seconds” and “Inverter
Offline” special screens (see Table 5-10) flashing alternately until the
countdown is complete.
Frequency Fault
0.0Hz
When the actual Frequency is over or under the allowable
range, as specified in “Output” on page A–2. This is a utility
fault; it will clear itself when the frequency comes within the
specified range.†
Over Temp Fault
81.4C 178.5F
When the unit’s internal temperature is greater than 80° C
(176° F), the unit will shut down automatically and only
restart when the temperature has dropped to less than 70° C
(158° F).
Ground Fault
Reset System
When a grounding fault is detected. The ground fault
protection fuse will be blown (North American models only).
The system must be shut down completely, the fault
corrected, and the fuse replaced.‡ The system can then be
restarted. Troubleshooting a grounding fault should be
performed by qualified personnel.
‡ Applicable to North American models only. European models do not have a
ground fault protection fuse installed.
Unit Shutdown
via Remote
Appears if the GT Inverter unit has been shut down via a
computer connected to the RS-232 port.
Protection uP
Not Responding
The protection processor is not responding.