Section III
Operation
006-0006885 08/14/18
Rev H
17 of 48
MINV-4000-1U-28 Guide www.synqor.com
Power Cable Connections
For safety reasons, the input and output power cables should be connected to the MINV before
the source of DC power is turned on, and before the MINV is turned on (see Section I: Warnings
and the SET-UP section above). Similarly, one should first turn off the MINV and the source of
input power before any power cables are disconnected from the MINV.
ALSO NOTE that when the MINV is turned on and delivering power to a load, and then another
piece of equipment is connected to the same output, it is possible that this connection will
momentarily disrupt the quality of the MINV’s output voltage. For instance, consider the case
where the AC OUTPUT power cable has a terminal strip that allows several loads to be connected
to it. If the MINV is turned on and delivering power to several of these loads and then another load
is connected to the terminal strip, it is possible that this new load will momentarily draw a large
surge of current as it starts up. If this happens, the output of the MINV could reach its maximum
current limit, and the MINV will reduce its output voltage to keep the current from getting any
larger. This reduction in voltage will be corrected once the new load reaches its normal mode of
operation, but in the meantime the reduction of the MINV’s output voltage might cause one or
more of the other loads to malfunction. Whether or not this will be a problem depends on the
characteristics of the various loads.
Cooling System
The SynQor MINV-4000 Series products are cooled by dual counter-rotating fans that draw air
into the intake on the front panel and exhaust it out the two fan ports on the rear panel. Care
should be taken to ensure there is no obstruction to this airflow, either at the front intake or the
rear exhaust ports. Similarly, care should be taken to avoid obstructing the fan blades.
The speed of the cooling fans is automatically controlled to provide adequate MINV cooling
while extending the life of the fan bearings. Under low ambient temperature and/or low MINV
output power the fans will be driven at a low speed or turned off. Fan speed is increased by the
internal controller based upon readings from multiple internal temperature sensors.
If the ambient temperature is low enough (for the level of power being delivered to the load),
the fans may not be on. This is not a malfunction. It is done to preserve the life of the fans. If the
fans are off, check the Fan Service Required LED on the front panel of the battery pack. If it is
GREEN, the fans are functioning properly and simply not needed under the present conditions.
The fans are weather-proof and water-proof.
The MINV has two fans to provide redundancy for these exposed, moving components. With
only a single operating fan the MINV is still able to deliver 80% rated power at an ambient
temperature of 40°C, and it is able to deliver 60% of its rated power at an ambient temperature
as high as 55°C.
