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Part 2: Operating Considerations
445-0089-01-01 5–3
Part 2: Operating Considerations
Fan Operation
The internal cooling fan operates for a number of conditions:
• One of the internal operating temperatures is greater than 55°C.
The fan will continue to run until one minute after the temperature drops to
45°C.
• The AC input or output current is greater than 20A (15A if the internal
temperature is greater than 40°C)—even in bypass mode, to keep the relay
cool. It will shut off one minute after the current drops below 13A.
ON/OFF/REMote Control of PROsine Operation
The ON/OFF/REM switch is located on the AC end of the PROsine.
• ON: The PROsine operates normally according to the configuration and
Display switch settings.
• OFF: The inverter and charger are disabled regardless of configuration or
Display switch settings. Shorepower will not be passed to the AC loads. In
this state, the battery current is minimal (less than 2mA). This state guarantees
that the PROsine does not discharge the battery bank.
• REMote: In this position, the remote control signal that the user provides to
the BATTERY TEMP jack turns the PROsine on or off. (For details about the
Remote Shutdown switch, see page 3–24.) When this signal is active, the
PROsine operates normally according to the configuration and Display switch
settings.
Hysteresis
Consider a scenario: the PROsine is operating in charge mode from shorepower.
The shorepower voltage falls below the transfer point of 90V. The PROsine
transfers to invert mode and the shorepower voltage rises to 95V - but the
PROsine does not transfer back to shorepower even though the shorepower
voltage is now above the transfer point. In this instance the PROsine applies 10V
of "hysteresis" to the transfer voltage before accepting the shorepower again (that
is, the PROsine will require 100V on the shorepower before transferring back).
Important:
This temperature may be caused by heat in the PROsine or by high
ambient temperature.
Important:
The PROsine will enter Invert or Charge modes only if enabled from the
display panel (or if it is configured to run without panel). When the remote control signal
is inactive, the PROsine is OFF, as described above.