28
Amplon N Series
Error
Code
Meaning
Possible
Cause
Solution
E16 Inverter
Fault
The UPS has
abnormalities.
Contact service personnel.
E18 DC-DC Fault The UPS has
abnormalities.
Contact service personnel.
E19 Abnormal
Output/
Inverter
Voltage
The UPS has
abnormalities.
Contact service personnel.
E21 O/P Short Output has a short-
circuit issue.
1. Check whether the output
has a short-circuit issue.
2. Contact service personnel.
Sd1 RPO
Shutdown
Remote shutdown
is executed from dry
contact.
After the remote shutdown
events are eliminated, follow
the turn-on procedures to
start up the UPS.
Sd4 Battery Low
Shutdown
The UPS transfers to
run in battery mode
due to AC utility
abnormality; however,
the battery power is
almost used up.
1. Check the main AC source
and the input power cord’s
status.
2. Contact service personnel.
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