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A2120 Gearbox oil pressure low

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A2120 is an alarm code for gearbox oil pressure low.1 It is associated with a 0.8 bar alarm threshold.1 The alarm can occur after a cold start, and the listed causes include cold oil, pump fault, or a blocked filter.12

Facts

  • Alarm A2120, Gearbox oil pressure low at 0.8 bar, can be caused by cold oil at start-up, pump fault, or blocked filter; actions are to allow heater time at cold start and check the pump and filter.1
  • On 2026-04-02, WTG-08 and WTG-09 raised A2120 Gearbox oil pressure low at 0.59 bar and later cleared at 1.35 bar.3456
  • For A2120 gearbox oil pressure low immediately after a cold start, technicians should give the heaters more time before escalating, because it is usually cold oil rather than a pump fault.2

Timeline

  • 2026-04-02: On 2026-04-02, WTG-08 and WTG-09 raised A2120 Gearbox oil pressure low at 0.59 bar and later cleared at 1.35 bar.3456

Documents

Sources

Footnotes

  1. LWS-MM-GBX-32 Rev. D — LT-32 Maintenance Manual Chapter 4 Gearbox Excerpt — p. 5 · ✓ quote verified ↩ ↩2 ↩3 ↩4

  2. Toolbox Talk: Cold-Weather Start-Up After PWG 220 Conversion — 01:23–01:34 · ✓ quote verified ↩ ↩2

  3. SCADA alarm and status log, 2026-04-01 to 2026-08-31 — row 32 · table ↩ ↩2

  4. SCADA alarm and status log, 2026-04-01 to 2026-08-31 — row 33 · table ↩ ↩2

  5. SCADA alarm and status log, 2026-04-01 to 2026-08-31 — row 34 · table ↩ ↩2

  6. SCADA alarm and status log, 2026-04-01 to 2026-08-31 — row 35 · table ↩ ↩2

Provenance badges✓ quote verified the quoted words were found verbatim in the source texttable values parsed deterministically from the cited table rows

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