APC Rack Automatic Transfer Switch, 12A, 230V SU043 User Manual
Product codes
SU043
APC Redundant Switch: Installation and Operation Manual
19
Troubleshooting
Troubleshooting
communications
and lost
redundancy
communications
and lost
redundancy
With the high availability system, the attached
UPS
s are polled
continuously for capability to carry a load and ability to
communicate with the management software (PowerChute
plus). When a problem with one of the
communicate with the management software (PowerChute
plus). When a problem with one of the
UPS
s occurs, power to
the load is not interrupted and polling continues, and
PowerChute plus responds by displaying the message, “Self
test failed: invalid test.”
PowerChute plus responds by displaying the message, “Self
test failed: invalid test.”
Communications Problems. If the message “Self test failed:
invalid test.” occurs repeatedly:
invalid test.” occurs repeatedly:
1. Check the communications path between the
UPS
s and
the Redundant Switch.
2. Check the front panel of the Redundant Switch.
– If the Status Select
LED
s are flashing in any sequence,
the Redundant Switch has failed. See “Basic
troubleshooting” on page 18.
troubleshooting” on page 18.
– If the front panel appears normal, there may be a
UPS
or server communications problem, See the
troubleshooting and service sections of your
troubleshooting and service sections of your
UPS
manuals.
– If you need more help, contact
APC
Worldwide
Customer Support.
Loss of Redundancy. If the Redundant Switch
LED
for
UPS
-
B
is off,
UPS
-
B
has lost the ability to provide power to the
equipment load when engaged. If the
LED
for
UPS
-A is off,
UPS-A has failed, and power is now provided by
UPS
-
B
. See
the troubleshooting and service sections of your
UPS
manuals.
If PowerChute plus displays the message “self test failed:
invalid test” briefly or several times, the output voltage of
invalid test” briefly or several times, the output voltage of
UPS
-
A
has dropped. Perform a
UPS
self-test through
PowerChute plus.
• If the self test fails, see the troubleshooting and service
sections of your
UPS
manuals.
• If you need more help, contact
APC
Worldwide
Customer Support.