Technical FAQs
Technical FAQs
Important Note: When replacing both intelligence modules in any single phase Symmetra UPS, the user should never remove both intelligence modules at the same time even with the UPS in Maintenance Bypass. Removing both modules at the same time prohibits the replacement modules from copying the existing settings of the UPS system. This could result in undesired operation of the UPS or inappropriate power being supplied to the load. Please adhere to the following procedures when replacing intelligence modules in any Symmetra UPS system.
1.) On most Symmetra systems, the display interface connects to one of the intelligence modules via a cat5 UTP patch cable. This cable should be disconnected from the intelligence module to which the display connects. If the UPS being serviced is a Symmetra Power Array (Masterframe or Miniframe) this will not be necessary.
2.) While intelligence modules are hot-swappable, it is recommended that the UPS be placed in Maintenance Bypass before installing a replacement. The UPS can be placed in maintenance bypass by performing the following steps.
3.) Locate the failed intelligence module and remove it. The failed intelligence module can be identified by a solid red LED illuminated on the intelligence module's LED array. The failed intelligence module can also be identified via the display interface or network management card.
4.) Install the replacement intelligence module and allow it several seconds to boot. If the replacement module is being installed in the bottom intelligence module slot, the user should wait for this module to assume control before proceeding.
Symmetra LX will indicate which intelligence module is in control by illuminating an additional green LED on the far left of the LED array. Non-LX systems such as Power Array and Symmetra RM 12kVA and 6kVA systems indicate that the main intelligence module has assumed control when the orange LED on the redundant intelligence module has extinguished.
5.) If both intelligence modules require replacement, remove the other module and install the replacement. If the replacement module is being installed in the bottom intelligence module slot, the user should wait for this module to assume control before proceeding.
Symmetra LX will indicate which intelligence module is in control by illuminating an additional green LED on the far left of the LED array. Non-LX systems such as Power Array and Symmetra RM 12kVA and 6kVA systems indicate that the main intelligence module has assumed control when the orange LED on the redundant intelligence module has extinguished.
6.) If the display interface was disconnected, reconnect it and wait for it to boot. Confirm that there are no faults reported by the system.