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26 Symmetra PX 160 kW 400 V Operation 990-3015-001
PDU fault list
Display Message Meaning Corrective Action
Maintenance Bypass Alarm
The system is in maintenance
bypass: the Q2 switch is open
and the Q3 switch is closed.
No corrective action necessary.
Output V <Ln-N>
Voltage Under Limit
Phase-to-neutral output voltage
for phase <L-N> has dropped
below the configured limit.
Evaluate the threshold setting. If necessary,
adjust it for your situation.
Output V <Ln-N>
Voltage Over Limit
Phase-to-neutral output voltage
for phase <L-N> exceeded the
configured limit.
Evaluate the threshold setting. If necessary,
adjust it for your situation.
Output I L<n>
Current Over Limit
Current of output phase <n>
exceeded the configured limit.
Evaluate the threshold setting. If necessary,
adjust it for your situation.
Output I L<n>
Current Under Limit
Current of output phase<n>
dropped below the configured
limit.
Evaluate the threshold setting. If necessary,
adjust it for your situation.
Output FDev
Freq Out of Range
Frequency of the output current
is above or below the range that
is configured as acceptable.
Evaluate the threshold setting. If necessary,
adjust it for your situation.
<User Contact Name>
Alarm Active
A user-configured contact
connected to the system is
reporting an alarm condition.
Determined why the alarm has occurred. This
is a user-specific alarm setting.
No UPS Input
Breaker Q1 Open
The Q1 circuit breaker is open,
and the UPS is disconnected
from the input voltage.
Close the Q1 switch to re-connect the UPS to
utility/mains power.
No Panel Feed
Breakers Q2 & Q3 Open
The Q2 & Q3 circuit breakers
are open, and the system is not
supporting connected
equipment.
For safety reasons, ensure the switches were
not closed for maintenance purposes. If not,
close Q2 for UPS operation, and Q3 for
maintenance bypass.
Atypical Bypass Mode
Alarm
The system state as set by the
Q1, Q2, & Q3 breakers is in a
non-typical bypass mode.
Option 1: Resume normal UPS operation.
Option 2: Go to maintenance bypass.