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©
2015 Sensata Technologies
4.0 Troubleshooting
Problem
Possible Cause/
Condition
Solution
Heavy
spark when
connecting the
battery power.
This is a normal
condition. It occurs
when the internal
DC input capacitors
(
fi
lter) are discharged
after the battery was
disconnected for at
least 30-40 seconds.
Due to a sudden high DC
surge (inrush) current
that charges the internal
big capacitors and quickly
disappears (milliseconds) once
capacitors get charged. Does
not represent any drawing
current from the battery.
The unit’s 20A
thermal breaker
trips even when
the unit is not
in an overload
condition.
This happens mainly
in By-Pass mode when
the maximum rating
of the unit’s breaker is
exceeded.
For maximum capacity, use
AC 1 (L1/N1) Output terminals
which are out of the tripping
in
fl
uence of the GFCI outlet
and the unit’s 20A thermal
breaker. Otherwise, do not
exceed the current ratings on
the GFCI outlet and AC 2 (L2/
N2) Output.
The unit cannot
be turned off
when using the
Power button in
By-Pass mode.
This is normal.
The unit has a PS1
(factory default)
setting. Use the
procedure on the right
to turn off the unit.
Note:
The Power
button’s on/off action
takes place at its
release moment and
after a “beep” is
heard.
To turn unit off when in By-
Pass mode: 1) disconnect the
AC input that feeds the unit—
forcing the unit into Inverter
mode. 2) push and hold the
Power button for 1 sec. (after
hearing beep) to turn unit off.
Set unit to PS4 mode. The
Power button can now be
used to turn the unit on and
off when in either By-Pass or
Inverter modes.
The display
doesn’t work as
expected (no
display or 888
shows) and the
operability of
the unit may be
affected.
A loose contact or
pin-out problems in
the RJ12 detachable
display panel cable
may have occurred.
A short (7”) RJ12 cable is used
when the detachable display
panel is unit-mounted (factory
default). Alternatively, a 25ft.
RJ12 cable is provided for
installing the display further
away. Swap cables to see if it
makes a difference.
Check the pin-to-pin
conductivity of the cable and
the corresponding pin-out as
shown in Figure 2-8.
Excessive EMI/
RFI interference
(electromagnetic
induction or
electromagnetic
radiation) emitted
from an external
source.
Avoid running the cable close
to motors, power contractors/
relays, ballasts, transformers,
or high voltage devices. In
high noisy environments,
consider using metal conduits
or a shielded cable grounded
at one end, and/or reduce
cable length.