58 | SAMLEX AMERICA INC.
SECTION 11 | Troubleshooting Guide
SYMPTOMS POSSIBLE CAUSE REMEDY
When switched ON:
• Green LED marked
"POWER"(2, Fig 6.1) does
not light
• Buzzer is OFF
• There is no AC output
• Status LED on the GFCI (5C,
Fig 2.1) is OFF
There is no voltage at the
DC input terminals
• Check the continuity of the battery
input circuit.
• Check that the internal/external DC input
fuses are intact. Replace if blown.
• Check that all connections in the battery
input circuit are tight.
Polarity of the DC input
voltage has been reversed
that has blown the exter-
nal / internal DC side fuses
(Note: Reverse polarity
may cause permanent
damage. Damage caused
due to reverse polarity is
not covered by warranty)
• Check external and internal fuses. Replace
fuses. If unit does not work, call Technical
Support for repair.
• Low AC output voltage
(< 120VAC but > 80VAC)
• No buzzer alarm
• AC load is exceeding
Surge Overload of
1000W
• Load is approaching
Surge Overload of
1000W during lower DC
input voltage
• Check that the battery is fully charged.
Recharge, if low.
• Check that the battery cables are thick
enough to carry the required current over
the required length. Use thicker cables, if
required.
• Tighten connections of battery input circuit.
• Reduce load.
• AC output voltage is
available
• Buzzer alarm is sounded
at no load or, when load is
switched on
• The Green LED marked
"POWER ON" (2, Fig 6.1)
is lighted
• Status LED on the GFCI
outlet (5C, Fig 6.1) is
lighted Green
• Low DC input voltage
alarm
• PST-600-12:
DC input voltage is 10.7
± 0.1V or lower but
higher than 10V ± 0.1V
• PST-600-24:
DC input voltage is
21.4 ± 0.2V or lower but
higher than 20V ± 0.2V
• Check that the battery is fully charged.
Recharge, if low.
• Check that the battery cables are thick
enough to carry the required current over
the required length. Use thicker cables, if
required.
• Tighten connections of the battery input
circuit.
• There is no AC output
voltage
• Buzzer alarm is sounded
at no load or when load is
switched on
• Green LED marked
"POWER ON" (2, Fig 6.1)
is lighted
• Status LED on the GFCI
outlet (5C, Fig 6.1) is OFF
• AC output voltage has
been shut down due to
low DC input voltage
• PST-600-12:
DC input voltage is 10 ±
0.1V or lower
• PST-600-24:
DC input voltage is 20 ±
0.2V or lower
• Check that the battery is fully charged.
Recharge, if low.
• Check that the battery cables are thick
enough to carry the required current over
the required length. Use thicker cables, if
required.
• Tighten connections of the battery input
circuit.
• The AC output voltage will switch ON auto-
matically when the DC input voltage rises to
11.5V ± 0.3V or higher for PST-600-12 or,
23V ± 0.5V or higher for PST-600-24
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