Section VI
Trouble-Shooting Guide
006-0006715 10/31/18
Rev J
42 of 44
MPS-MPPS-4000 Guide
www.synqor.com
LED
Indication
Possible Problem(s)
B0 – B3:
LOAD POWER
LEDs
B3 is BLINKING RED
• Total load power is greater than or approaching 4000 W. The Unit
may still be delivering its specified output voltage because the load
power is not high enough to trigger the power limit circuitry.
B0 – B3 are all OFF
• No power is being delivered to the load.
• The Unit is OFF and needs to be turned ON.
• The loads or output cables are not connected.
• The loads are all turned off.
• The loads are simply not drawing any appreciable power at the time.
C0:
Cooling
System LED
LED is BLINKING
GREEN
• Indicates that the fans are running at 67% of their rated speed.
There is no problem.
LED is AMBER
• Indicates that the fans are running at 100% of their rated speed.
There is no problem, but the Unit is operating at a high ambient
temperature and a high load combination.
LED is RED
• Fans are running at 110% of rated speed to keep the Unit cool. The
maximum recommended temperature may be exceeded, but the
fans are keeping things cool enough to avoid triggering the over-
temperature shut-down circuitry.
F0:
Fan Service
Required LED
LED is AMBER
• One or both fans have recently had degraded performance but seem
to be ok now. The Unit is running a diagnostic test.
LED is RED
• One or both fans presently have degraded performance, even
if they are running, and service is recommended at the earliest
convenient time.
• Ensure that the fan blades are not obstructed from turning
All LEDs:
All LEDs are OFF
• The Unit is OFF and needs to be turned ON.
• The AC INPUT power is not turned ON.
• The AC Breaker on the rear panel is OFF.