Samlex America SEC-4825BRM - Manual (Page 29)

28 | SAMLEX AMERICA INC. SAMLEX AMERICA INC. | 29
Section 8 | troubleshooting Guide
Symptom Possible Cause Remedy
ON / OFF Switch is ON
• Switch is lighted
• DC Output voltage
drops
If the voltage loses regulation
and drops to < 54.2V, the unit is
overloaded and is in current limit.
The load is trying to draw ≥ the
current limit value of 30A
If the voltage drop is considerable
with voltage < 2V, the load side is
seeing a short circuit
Reduce the current drawn by the load to
less than the continuous rating of 25A.
Switch OFF the load. Remove the short
circuit on the load side.
GFCI outlet / GFCI breaker
supplying AC power to
the unit trips when the
unit is switched ON
Additional RF noise currents from
the unit that are filtered to Earth
Ground increase the net Leakage
Current on the GFCI outlet / GFCI
breaker to > 5mA
Switch OFF other SMPS devices operating
from the same GFCI outlet / GFCI breaker
to reduce the net leakage current to
< 5mA
Move the unit to another GFCI outlet /
GFCI breaker that has lesser number of
SMPS load(s) or no SMPS load
Power the unit from normal, non GFCI
outlet or from an outlet not protected by
GFCI breaker
3. 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 is < 54V to 54.6V
and is dropping
• Output voltage at the Load
Terminals is 0.3V ± 0.1V lower
than the Battery Terminals and
is dropping
No AC power from the
AC outlet
AC Input Breaker is tripped
Check AC power is available at
the AC outlet. Breaker feeding
the AC outlet may have tripped or
there may be power outage.
Reset the breaker.
If breaker trips again, please call
Technical Support.
ON / OFF Switch is ON
• Switch is lighted
• Load is ON
• Output voltage at the Load
Terminals loses regulation and
drops below 54.2V
• Output voltage at the Load
Terminals is 0.3 ± 0.1V lower
than the Battery Terminals 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 30A. The Time
Current Characteristic of the 25A
Fuse (F2) in the Load circuit will
determine the allowable value of
overload current > 30A 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
30A in current limit condition and
the balance of current is fed from
the battery and the battery starts
discharging at current = (Overload
current - 30A)
Remove the cause of overload
11001-SEC-4825BRM-0114.indd 29 14-01-07 1:15 PM