Samlex America SEC-4825BRM - Manual (Page 30)

30 | SAMLEX AMERICA INC. SAMLEX AMERICA INC. | 31
Section 8 | troubleshooting Guide
Symptom Possible Cause Remedy
ON / OFF Switch is ON
• Switch is lighted
• There is no voltage at the at
the load end and the load is
shut down
• Voltage at the Load Terminals
is 54.8V
• Voltage at Battery Terminals is
0.3V ± 0.1V lower than the
voltage at the Load terminals
25A Fuse (F2) in the Load circuit is
blown due to:
- Excessive short time overload
current > 25A exceeding the
Time Current Characteristics of
the 25A fuse, or
- Short circuit in the load circuit
Remove the cause of the overload
or short circuit.
ON / OFF Switch is ON
• Switch is lighted
• Load is ON
• Voltage at the Load Terminals
is 54.8V to 54.2V
• Voltage at Battery Terminals is
the same as the Load Terminals
• Battery backup function does
not operate – Load shuts OFF
when AC power is interrupted
25A Fuse F1 in the battery circuit
is blown due to short circuit in
battery wiring or reversal of
battery polarity Check that the polarity of battery
connections is correct. Replace
the fuse.
Check for short circuit in the
battery wiring and correct.
Replace the fuse.
GFCI outlet / GFCI breaker
supplying AC power to the
unit trips when the unit is
switched ON Additional RF noise current from
the unit that is fi ltered to Earth
Ground increases 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.
The unit is not in use. ON/OFF
Switch is OFF
• Battery is connected to the
Battery Terminals
• Load is OFF/disconnected
• Battery is getting discharged
Battery is draining by 100 mA
through the Static Load Resis-
tor connected across the Load
Terminals Remove Battery Fuse F1 when the
unit is not in use.
3. BATTERY BACKUP OPERATION - EXTERNAL BATTERY IS CONNECTED (continued)
11001-SEC-4825BRM-0114.indd 30 14-01-07 1:15 PM