| Troubleshooting |
Troubleshooting | With the high availability system, the attached UPSs are polled |
communications | continuously for capability to carry a load and ability to |
and lost | communicate with the management software (PowerChute |
redundancy | plus). When a problem with one of the UPSs occurs, power to |
| the load is not interrupted and polling continues, and |
| PowerChute plus responds by displaying the message, “Self |
| test failed: invalid test.” |
| Communications Problems. If the message “Self test failed: |
| invalid test.” occurs repeatedly: |
| 1. Check the communications path between the UPSs and |
| the Redundant Switch. |
| 2. Check the front panel of the Redundant Switch. |
| – If the Status Select LEDs are flashing in any sequence, |
| the Redundant Switch has failed. See “Basic |
| 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 UPS |
| manuals. |
| – If you need more help, contact APC Worldwide |
| Customer Support. |
| Loss of Redundancy. If the Redundant Switch LED for |
| is off, |
| equipment load when engaged. If the LED for |
| |
| 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
•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.
APC Redundant Switch: Installation and Operation Manual | 19 |