Section VIII
Trouble-Shooting Guide
006-0007129 10/12/2018
Rev B
55 of 60
UPS-1500 3-Phase Guide
www.synqor.com
LED
Indication
Possible Problem(s)
B0 – B3:
LOAD Power
LEDs
B3 is BLINKING RED
• Total UPS load power is greater than or approaching 1250 W. The
UPS 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 UPS 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.
F0:
UPS 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.
F1:
Battery Pack
Temperature
LED
LED is BLINKING
RED
• The battery is too cold to be charged or discharged without damage.
• If the UPS is running from the AC INPUT or the DC INPUT the battery
will eventually be warmed up and this condition will go away.
LED is BLINKING
AMBER
• The battery is too cold to be charged without damage, but it can be
discharged if the UPS needs to draw power from it.
• If the UPS is running from the AC INPUT, the DC INPUT or the
battery, the battery will eventually be warmed up and this
condition will go away.
LED is STEADY
AMBER
• The battery is too hot to be charged without damage, but it can be
discharged if the UPS needs to draw power from it.
• If the ambient temperature is within its specified range the battery
will eventually cool down and this condition will go away.
LED is STEADY RED
• The battery is too hot to be charged or discharged without damage.
• If the ambient temperature is within its specified range the battery
will eventually cool down and this condition will go away.
