Product Manual

Troubleshooting
52 900-0161-01-01 Rev B
Warning Messages
A warning message is caused by a non-critical fault. When this occurs, the unit will not shut
down, but a MATE3-class system display will show an event and a specific warning 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 warning.
NOTE
:
The Radian series has no external indicators. It requires a system display to identify
a warning.
Some warnings can become errors if left unattended. Frequency and voltage warnings are
meant to warn of a problematic AC source. Often the inverter will disconnect from the source.
This will occur if the condition lasts longer than the inverter’s transfer delay settings. If the
inverter disconnects, the warning will display as long as the source is present, accompanied by
a disconnect message. (See page 54.)
Warning screens can only display warnings; they cannot clear them. The way to correct the
fault may be obvious from the message.
Table 7
W
arning Troubleshooting
Message Definition Possible Remedy
AC Freq Too High The AC source is above the upper
acceptable frequency limit and prevents
connection.
Check the AC source. If it is a generator,
reduce its speed.
AC Freq Too Low The AC source is below the lower
acceptable frequency limit and prevents
connection.
Check the AC source. If it is a generator,
increase its speed.
Voltage Too High The AC source is above the upper
acceptable voltage limit and prevents
connection.
Check the AC source. The inverter’s
acceptance range is adjustable.
NOTE
:
Adjusting the range may
accommodate a problematic AC source, but it
will not fix it.
Voltage Too Low The AC source is below the lower
acceptable voltage limit and prevents
connection.
Check the AC source. Check the AC wiring.
The inverter’s acceptance range is adjustable.
NOTE
:
Adjusting the range may
accommodate a problematic AC source, but it
will not fix it.
Input Amps > Max AC loads are drawing more current from
the AC source than allowed by the input
setting.
Check the loads. Oversized loads can open
circuit breakers. If they exceed the inverter’s
transfer relay size, the relay can be damaged.
This issue is usually the result of a poorly-
sized load, as opposed to a wiring problem.
Temp Sensor Bad An internal inverter temperature sensor
may be malfunctioning. One of the three
internal sensor meters may give an
unusual reading.
In the system display, the three readings are
labeled
Transformer, Output FETs,
and
Capacitors
. These values are given in
degrees Celsius. See next page.
Phase Loss A slave was ordered to transfer to an AC
source by the master, but the AC source is
the wrong phase or no AC source is present.
Check the AC voltage on the inverter input
terminals. If AC voltage is not present,
problem is external. If AC voltage is present,
the unit may be damaged and requires repair.