Alpha Technologies INEX 100A STS Module and MBS+PDU - Manual (Page 28)

Argus Technologies Ltd. 019-061-C0 Rev A WC
Printed in Canada. © 2009 Argus Technologies Ltd. ARGUS is a registered trademark of Argus Technologies Ltd. All Rights Reserved. Page 18 of 26
7 Maintenance and Troubleshooting
7.1 Preventative Maintenance
The following preventive maintenance routines should be considered as a minimum requirement. Your installation
and site may require additional preventive maintenance to assure optimal performance from your installed inverter
and associated equipment. These routines should be performed twice a year (more often if required). We strongly
recommend a contract with Customer Support Services for preventive and remedial maintenance. The technician
or electrician performing preventive maintenance on the equipment must read and understand thoroughly this
manual and be familiar with the indicators, controls, and operation of the equipment.
7.2 Troubleshooting Guide
If the system fails to operate properly and the installation, setup, and operation have been checked, use the
following Troubleshooting table to determine the probable cause and obtain suggestions on how to proceed. It will
not include all the fault conditions, please refer to the LED display status to adjust the cause.
Error Condition Possible Cause Recommendation
No AC output
and all LEDs off.
Lack of input power.
Check if input cables and bus bars are all firmly
connected to power source.
Check if inverter output or Mains AC are not yet
switched on, or is low in power.
Priority is On line, STS
AC output is normal but
with yellow LED on. STS AC input source is from inverter. The
inverter is in normal status, but the utility line is in
abnormal status.
Check AC Mains connection and status.
Priority is On line, STS
AC output is normal but
with green LED flashing
1 time / second. STS AC input source is from utility, the inverter is
in normal status; if the inverter is from abnormal
status back to normal, the STS will switch the line
from utility to inverter line.
Please refer to Troubleshooting for inverter.
Priority is On line, STS
AC output is normal but
with green LED flashing
1 time / second and
yellow LED on.
SYS AC input source is from utility, but inverter is
in abnormal status.
Please refer to Troubleshooting for inverter.
No AC output,
yellow LED is on. Both inverter and utility AC source are in
abnormal status.
Check AC mains and inverter output.
Priority is off line,
AC output is normal
from Mains, but yellow
LED is on.
STS AC input source is from utility, but inverter is
in abnormal status.
Please refer to Troubleshooting for inverter.
Priority is off line,
AC is normal, but with
green LED flashing 1
time / second.
STS AC input source is from inverter, but utility is
in abnormal status.
Check AC Mains connection and status.
No AC output,
yellow LED is on. The relay of utility power side is broken and
cannot for closed circuit. Turn MBS to mains or inverter bypass mode,
maintain the STS module.
No AC output,
yellow LED flashing 2
times / second.
The relay of utility power side is broken and
cannot for closed circuit. Turn MBS to mains or inverter bypass mode,
maintain the STS module.
AC output is normal,
green LED is on, yellow
LED flashing 2 times /
second.
The relay of utility power side is broken and
cannot for closed circuit. Turn MBS to mains or inverter bypass mode,
maintain the STS module.
AC output is normal,
green LED is on, red
LED flashing 1 time /
second.
Fan fails.
Turn MBS to mains or inverter bypass mode,
maintain the STS fan.
AC output is normal,
green LED is on, red
LED flashing 1 time / s.
EEprom FAULT
EEprom can’t write or read data. This will not influence the STS AC output. The
alert will be off automatically after 10s later.