Product Manual

Troubleshooting
900-0161-01-01 Rev B 51
Error Messages
An error is caused by a critical fault. In most cases when this occurs, the unit will shut down.
A MATE3-class system display will show an event and a specific error message. This screen
is viewed using the Home screen’s soft keys. (See the system display literature for more
instructions.) One or more messages will display
Y
(yes). If a message says
N
(no), it is not the
cause of the error.
NOTE
:
The Radian has no external indicators. It requires a system display to identify an error.
Some errors will reset automatically when the cause is resolved. These are noted.
It is possible to clear errors by resetting the inverter. To reset, turn the inverter off and then on.
Other possible steps are shown below. Each should be followed by resetting the inverter.
Table 6 Erro
r
Troubleshooting
Message Causes Possible Remed
y
Low Output
Voltage
Inverter’s AC regulation cannot be maintained
under high load conditions.
NOTE
:
The GS8048A can maintain only 4
kVA on L1 when L2 has loads between 0 and 4
kVA (at 25°C). The opposite is also true. The
GS4048A has similar limits at half this wattage.
Check loads and measure current draw.
Remove loads as necessary.
AC Output
Shorted
Inverter exceeded its maximum surge current
due to severe overload.
Check the loads and wiring. This issue is
usually the result of a wiring problem (a short),
as opposed to a poorl
y
-sized load.
AC Output
Backfeed
Usually indicates another AC power source
(out of phase with the inverter) was connected
to the unit’s AC output.
Disconnect the
AC
O
UT
wires from the
inverter. Check the wires (not the inverter)
with an AC voltmeter. If an AC source is
present, shut it off.
Stacking Error
Programming problem among stacked units.
(Occurs if master inverter was not designated.)
Can also occur if
AC Output Backfeed
occurs.

Check stacking programming and
designation of master. (See page 36.)

Check for output backfeed from an external
source. Disconnect output if necessary.
Low Battery V
3
DC voltage is below the low battery cut-out
set point, usually due to battery discharge.
It occurs after 5 minutes at this voltage.
This error can be triggered by other causes.
It can appear along with
Low Output Voltage
,
AC Output Shorted
, or
AC Output Backfeed
.

If this error accompanies other errors, treat
those conditions as appropriate.

If it occurs by itself: Recharge the
batteries. The error will clear automatically
if an AC source is connected and the
charger turns on.
High Battery V
3
DC voltage exceeded acceptable level. See
page 21.
Check the charging source. This problem is
usually the result of external charging.
Over
Temperatur
e
3
Inverter has exceeded its maximum allowed
operatin
g
temperature. See pa
g
e 53.
Allow the inverter to remain off to reduce the
temperature, or add external coolin
g
.
Comm Fault
The inverter has suffered an internal
communication failure.
Unit may be damaged and requires repair.
Loose DC Neg
Terminals
(
L
o
r
R
)
Loose DC connection on left (L) or right (R)
internal power module.
Tighten all DC connections between inverter
and battery. If the error is not resolved, unit
ma
y
be dama
g
ed and requires repair.
Battery Voltage
Sens
e
Internal sensing has detected battery voltages
below 32 Vdc or above 64 Vdc.
If these readings are not correct, unit may be
dama
g
ed and requires repair.
AC Rela
y
Fault
AC transfer rela
y
dama
g
ed. Unit ma
y
be dama
g
ed and requires repair.
3 This error will clear automatically when the cause of the error is resolved. The inverter will begin functioning again when this occurs.