Section III
Operation
006-0006715 10/31/18
Rev J
28 of 44
MPS-MPPS-4000 Guide
www.synqor.com
Cooling System
The SynQor MPS-4000 & MPPS-4000 Series products are cooled by 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 MPS or MPPS
cooling while extending the life of the fan bearings. Under low ambient temperature and/
or low MPS or MPPS output power the fans will be driven at a low speed. If the ambient
temperature and output power are such that the MPS or MPPS cannot otherwise maintain its
specified maximum temperature for its internal circuitry, the fans will momentarily be driven
at a speed that exceeds their rated long-term running speed.
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 MPS or MPPS has two fans to provide redundancy for these exposed, moving components.
With only a single operating fan the MPS or MPPS 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.
