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4
To start FERRUPS on battery power, use the
key to
turn on the On/Off switch. After a brief self-
check, the yellow BATTERY POWER light and
the green READY light will light on the UPS
and the control panel. The UPS will beep every
20 seconds to let you know it is running on
battery power (inverter). The control panel will
show the Best Power logo; press the [ENTER]
key. Now, the control panel will scroll this
display:
FERRUPS by BEST
Mode: Auto
Charger: Off
Beeper: Enabled
If the red ALARM light is on, read the
alarm message on the control panel display,
turn off the On/Off and DC switches, and
call Best Power’s Worldwide Service at 1-
800-356-5737 or 1-608-565-2100, or call the
nearest Best Power office.
5
If your FERRUPS has a plug, turn the AC input
power on at the service panel. The green AC
LINE light will light. After a few seconds,
FERRUPS will switch from battery power
(inverter) to AC input power. The BATTERY
POWER light should turn off.
If your FERRUPS does not have a plug, it has a
bypass switch (either on the back of the
FERRUPS or mounted nearby). Turn the UPS
AC Line Disconnect Switch on. The green AC
LINE light will light. After a few seconds,
FERRUPS will switch from battery power
(inverter) to AC input power. The BATTERY
POWER light should turn off. Now, turn the
UPS Bypass Switch to “UPS.”
The CHARGING light may be on at this point; this means FERRUPS’ batteries are not fully charged, and
FERRUPS is charging them now. FERRUPS automatically charges the batteries whenever the AC LINE
light is on and the BATTERY POWER light is off. The CHARGING light will turn off when the batteries
have been fully charged. This may take 24 hours. FERRUPS’ runtime (battery backup time) will be shorter
until the batteries have been charged.