YAMABISHI miniUPS ALS Series, Instruction Manual

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Problem Causes Solutions
Line LED flickers AC grounding wire abnormal Check grounding wire with
assistance of power engineering
service
After AC connected to UPS,
alarm sounds short and
fast beeps and UPS shut
down AC abnormal Check AC power
After starting the UPS,
alarm sounds short beeps
continuously, then the UPS
shuts down AC noise or environment
noise Check AC or battery wires
UPS PCB abnormal Call for service
Five short beep
continuously Internal over temperature Check the ventilation
Fan fail Call service to replace the fan
Four short beep
continuously PFC over load protect in
action due to low AC input Check input AC power or release
LINE LED did not lit on
after connect AC input and
BOOST, INV LED lit on
with three short beep
continuously AC input is abnormal due to
input voltage and UPS goes
into DC mode Disconnect input AC power and
check
Input switch not turn on Turn on the input switch
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