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POWERING TECHNOLOGY
Manual No. MS0027-MAN rev. 4
guardian_access_3u_ms27-man-rev4-0817.indd
Fault Possible Cause Suggestion/Solution
Symmetry Fault
Battery at end of life.
Wrong symmetry cable connection.
Wrongly set Symmetry limit value.
Verify the battery condition.
Verify the symmetry cable
connection.
Verify the Symmetry limit value.
Low Battery
Temperature
Battery temperature drops below the
set Low battery temperature limit.
Check the heating of the system.
Check the ambient temperature
(it should not be lower than
recommended battery temperature).
high Battery
Temperature
Battery temperature exceeded the set
limit.
Check the cooling or ventilation.
Verify the battery condition.
Check the Battery Current Limit.
Temp. Probe
Failure
The temperature probe is not properly
connected to the system.
Faulty temperature probe.
Temperature probe wire is
interrupted.
Temperature dierence between the
controller temperature and the probe
temperature is greater than 60°C.
Verify the temperature probe
connection.
Verify the internal / external
temperature via controller front panel.
Replace the faulty probe with a new
one.
Identify the root cause of the hot
environment at the batteries and/or
controller.
Alarms Blocked
(only with LCD
display)
Alarm is manually activated by the
serviceman on the site (used during
system servicing, no other alarm is
displayed)
Needs to be manually turned OFF to
allow the alarms to be displayed
If none of the above solves the problem please contact customer support.
To phone us please visit http://www.unipowerco.com/contact/ and select Customer “Support/
Repairs” and then “Customer Service” where you will nd the correct phone number for
your region.
Alternatively, email:
Region Email Address
Asia/Pacic Sales-Asia@unipowerco.com
Europe, Middle East and Africa Sales-NorthAmerica@unipowerco.com
The Americas and Caribbean Sales-NorthAmerica@unipowerco.com
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