18 | SAMLEX AMERICA INC.
SAMLEX AMERICA INC. | 19
SeCtIOn 8 |
troubleshooting Guide
BAtteRY BAcKUP oPeRAtion - eXteRnAL BAtteRY iS connecteD
Symptom
Possible cause
Remedy
ON / OFF Switch is ON
• Switch is NOT lighted
• Load is ON and is operating
normally
• Output voltage at the Battery
Terminals (5, 6) is < 13.8 ±
0.2V and is dropping
• Output voltage at the Load
Terminals (3, 4) is 0.3V ± 0.2V
lower than the Battery Termi-
nals (5, 6) and is dropping
No AC power from the
AC outlet
Internal AC side fuse of the Power
Supply Section is blown
Check AC power is available at
the AC outlet. Breaker feeding
the AC outlet may have tripped.
Open the top cover and check
the 4A AC side fuse. Replace if
blown.
If the fuse blows again, the input
section is damaged. Please call
Tech Support.
ON / OFF Switch is ON
• Switch IS lighted
• Load is ON and is operating
normally
• Output voltage at the
Battery terminals (5, 6) is
<13.8V ± 0.2V and is dropping
• Output voltage at the Load
Terminals (3, 4) is 0.3 ± 0.2V
lower than the Battery Termi-
nals (5, 6) and is dropping
Power Supply Section of the Unit
has shut down due to over tem-
perature – Temperature of output
transformer windings is
≥ 105°C ± 5°C / 221°F ± 9°F.
Check that the fan is running. if
not, the fan / fan control circuit
may have been damaged. Call
Tech Support.
Check that the fan suction vents
on the sides of the unit and the
discharge vents on the bottom of
the unit are not blocked.
The Power Supply Section will
reset automatically when the
transformer windings cool down
to ≤ 75°C ± 5°C / 167°F
± 9°F. During the time the Power
Supply Section is OFF, the battery
will supply the load and will
discharge during this period.
ON / OFF Switch is ON
• Switch is lighted
• Load is ON
• Output voltage at the Load
Terminals (3, 4) loses regulation
and drops below 13.8 ± 0.2V
• Output voltage at the Load
Terminals (3, 4) is 0.3 ± 0.2V
lower than the Battery Termi-
nals (5, 6) and is dropping
Power Supply Section is over-
loaded and is in current limit
condition. The load is trying to
draw excessive current ≥ the cur-
rent limit value of 25A. The Time
Current Characteristic of the 25A
fuse (F2) in the Load circuit will
determine the allowable value of
overload current > 25A and the
time it can be sustained before
the fuse blows. The allowable
value will be higher for shorter
duration of overload.
Power Supply Section provides 25A
and the balance of current is fed
from the battery and the battery
starts discharging at current =
(Overload current - 25A)
Remove the cause of overload
