Troubleshooting
9-24
InterReach Unison Installation, Operation, and Reference Manual
CONFIDENTIAL
D-620003-0-20 Rev J
Expansion Hub Status Messages
Table 9-8
Status Messages Reported by the Expansion Hub
Status Message
Action
[ES01]The DL fiber interface has high opti-
cal loss
Downlink optical loss is above THE recommended minimum. If codes
MF41-MF44 (EH no communications) are observed, the fiber optical loss is
near the absolute minimum.
Excessive downlink optical loss may also result with ES02/EW22 codes
Clean the fiber connectors and ports, and check the DL cable for excessive
optical loss.
[ES02]The DL RF path loss is above the
recommended limit
Downlink RF loss is above the recommended minimum. If ES01 is also
present, the fiber is the most likely problem. Clean the fiber ports and connec-
tors. Ensure the fiber is correctly seated.
If ES01 is not present, disconnect both downlink and uplink fiber at the Main
Hub. Wait 10 seconds, then re-connect downlink and uplink fiber.
[ES03]UL laser is failing
Replace the Expansion Hub when possible.
[ES04]System test required*
Run the system test.
[ES05]Temperature is high
Check the fan for rotation, air flow blockage, and dust. Check the room envi-
ronmental controls.
[ES06]Fan 1 failure
Check the fan for rotation, air flow blockage, and dust. Replace the EH on tem-
perature fault.
[ES07]Fan 2 failure
Check the fan for rotation, air flow blockage, and dust. Replace the EH on tem-
perature fault.
[ES08]Fan 3 failure
Check the fan for rotation, air flow blockage, and dust. Replace the EH on tem-
perature fault.
[ES09]Port 1 UL RF path loss is above the
recommended limit
Uplink RF is below the recommended minimum; the CAT-5 cable may be
longer than the recommended minimum.
Check the CAT-5E/6 cable, especially on new installations. Check the CAT-5
Extender, if present. Use the CAT-5 Extender to improve coverage.
[ES10]Port 2 UL RF path loss is above the
recommended limit
Uplink RF is below the recommended minimum; the CAT-5 cable may be
longer than the recommended minimum.
Check the CAT-5E/6 cable, especially on new installations. Check the CAT-5
Extender, if present. Use the CAT-5 Extender to improve coverage.
[ES11]Port 3 UL RF path loss is above the
recommended limit
Uplink RF is below the recommended minimum; the CAT-5 cable may be
longer than the recommended minimum.
Check the CAT-5E/6 cable, especially on new installations. Check the CAT-5
Extender, if present. Use the CAT-5 Extender to improve coverage.
[ES12]Port 4 UL RF path loss is above the
recommended limit
Uplink RF is below the recommended minimum; the CAT-5 cable may be
longer than the recommended minimum.
Check the CAT-5E/6 cable, especially on new installations. Check the CAT-5
Extender, if present. Use the CAT-5 Extender to improve coverage.
