OPERATIONS
POWERmini USB User Guide 2.1.0A
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350-00103-5
Other Functions
Display Timeout
The display is active as soon as the unit is powered on. After a period of about 5 minutes of inactivity the
display is automatically blanked. To turn the display back on briefly press any of the front panel buttons.
When the display is blanked the Front panel LED flashes periodically to indicate that the system is
operational.
Auto Shutdown (under voltage condition)
Auto-Shutdown automatically disconnects the battery from the load when the voltage falls below the Low
Voltage Disconnect threshold (LVD) The Auto-shutdown may be enabled or disabled by the user.
If the Auto-shutdown is enabled, when the battery voltage falls below the LVD, the Shutoff warning is
indicated at the bottom of the Status screen. Both the POWER LED (red to show alarm condition), and the
audible alarm (if enabled) will sound for a period of approximately 10 seconds. After this warning period
the POWERmini will disable the output and the audible alarm will stop.
The output will be automatically reconnected when the battery voltage rises above the Low Voltage Reset
threshold (LVR). (See page 4, Battery Settings) for information on how to change this value.
If the Auto-shutdown mode is disabled, the POWERmini will not disconnect the battery and after the
warning period the alarm will cease to sound. The shutdown message will be displayed on the bottom of
the Status page regardless of whether Auto Off is enabled or not.
IMPORTANT: Regardless of whether the auto-shutdown mode is enabled or not, if the battery voltage falls
below 10.1V POWERmini USB will automatically shut down and will not restart until it is reset by
disconnecting and then reconnecting the battery from the unit.
Auto Shutdown (over voltage condition)
Most amateur radio equipment is designed to operate from a power source of 13.8 V +/- 15% which is a
range from 11.7V to 15.8V. Check the specification for your specific radio as some have an upper limit of
15V and some are designed to operate at voltages below 11 V.
The output will be automatically disconnected when the battery voltage rises above the High Voltage
threshold (HVR).
Operating at higher voltage than the maximum may cause damage to the equipment and operating below
the minimum voltage may result in below normal performance (especially on transmit).
Output Overload
POWERmini USB protects the system from overload by automatically disconnecting the load if excessive
load current is detected. This is indicated by the Power LED flashing RED and an audible warning if the
audible alarm is enabled. The source of overload should be investigated and rectified before using the
system. The following procedure should be used to remedy the fault condition.
1.
Disconnect the load from POWERmini USB (both ports) by removing the Powerpole load
connectors at the POWERmini USB end of the cable.
2.
Disconnect the battery from the POWERmini USB
3.
Reconnect the battery from the POWERmini USB and confirm that the unit powered up normally.
4.
Visually inspect the output cables for damaged insulation or strands of wire shorting at either
end of the cable.
5.
Check with an ohmmeter for a short circuit between conductors of the output cable.
