warning RV air conditioner error codes

What it means

230V mains power was interrupted and the compressor switched off as a result. On the air conditioner's IR receiver this shows as two LEDs flashing simultaneously; on a connected Truma control panel it appears as warning W17A.

Most likely causes

1. Shore power / 230V supply briefly dropped or disconnected most likely
2. Weak or undersized power supply / voltage sag common
3. Tripped breaker or blown fuse on the AC circuit common
4. Generator instability less common

Safe checks you can do yourself

• Confirm the RV has a stable 230V supply and the cord is fully connected
• Check that the relevant breaker/fuse for the air conditioner is not tripped or blown
• If on generator, verify it is supplying steady voltage
• Wait the mandatory 3-minute compressor restart delay before expecting cooling to resume

How to reset / clear W17A

1. Restore correct, stable 230V supply
2. Wait about 3 minutes for the compressor pressure to equalize; the compressor then restarts on its own and the unit resumes the previously set mode

When to call a technician

If the warning recurs with a known-good, stable power supply, or if the compressor never restarts after the 3-minute delay.

Applies to

Truma Aventa comfort · Truma Aventa eco

FAQ

Related · Truma air conditioner

Sources

• Aventa IR receiver — two LEDs flashing simultaneously — Truma support article: 230V interrupted, compressor off, warning W17A, 3-minute restart delay (Truma (official support))

Note: W17A is shown only if a compatible Truma control panel is connected; otherwise the indication is the two simultaneously flashing IR-receiver LEDs. The 3-minute delay is a fixed protective wait, not a fault.

● Last verified 2026-06-29 · compiled from manufacturer documentation. Codes can vary by model year — always cross-check your unit’s manual.