Section VIII
Trouble-Shooting Guide
006-0007129 10/12/2018
Rev B
54 of 60
UPS-1500 3-Phase Guide
www.synqor.com
LED
Indication
Possible Problem(s)
D1:
AC INPUT
Power LED
LED is OFF
• The AC INPUT power source is not turned “ON”.
• The AC INPUT cable is not connected or it is wired wrong.
• The AC SWITCH on the rear panel is “OFF”.
• The AC INPUT voltage is either too low or too high.
LED is a STEADY
GREEN and not a
PULSING GREEN.
UPS is instead
running off the
optional DC INPUT
or the BATTERY
• The AC INPUT voltage is within its proper range but the UPS is not
selecting it for its source of power.
• The AC INPUT voltage and the total load power may exceed the
power derating curves given earlier in this Guide.
• The AC INPUT cable may have too much series resistance. Thicker
wire should be used.
D0:
DC INPUT
Power LED
LED is OFF
• The optional DC INPUT is not available on this unit.
• The DC INPUT power source is not turned “ON”.
• The DC INPUT cable is not connected or it is wired wrong.
• The DC INPUT cable is connected to the DC source with the
wrong polarity.
• The DC INPUT voltage is either too low or too high
• The DC INPUT cable may have too much series resistance. Thicker
wire should be used.
A1:
AC OUTPUT
Power LED
LED is OFF
• The UPS is “OFF” and needs to be turned “ON”.
LED is AMBER
• The AC OUTPUT load is higher than 1250 W or 1500 VA by enough
to trigger the power limit circuitry.
• The AC OUTPUT load crest factor is too high.
• The AC OUTPUT is shorted within the cable or a load.
• Some other source of power is connected to the AC OUTPUT.
LED is RED
• The UPS has been turned “OFF”, but due to a malfunction within
the UPS it is still running and providing an AC OUTPUT voltage.
• Some other source of voltage is connected to the AC OUTPUT and
is powering it when the UPS is not.
A0:
DC OUTPUT
Power LED
LED is OFF
• The optional DC OUTPUT is not available on the unit.
• The UPS is “OFF” and needs to be turned “ON”.
LED is AMBER
• The DC OUTPUT load is higher than 500 W.
• The DC OUTPUT is shorted within the cable or a load.
• Some other source of power is connected to the DC OUTPUT.
LED is RED
• The UPS has been turned “OFF”, but due to a malfunction within
the UPS it is still running and providing an DC OUTPUT voltage.
• Some other source of voltage is connected to the DC OUTPUT and
is powering it when the UPS is not