Fujitsu POWER/MODE ON status display

What it means

A steady green POWER/MODE LED means the outdoor board is powered, including while an error may also be present. It is not an error code by itself.

Urgency

Likely causes

1. Brief power event, brownout, or unstable supply voltage
2. Loose power connection, reactor, or outdoor electrical component problem
3. Inverter/IPM protection or current-detection fault
4. Compressor winding, drive, or outdoor board fault after power checks pass

Homeowner fix

No repair action is needed for a steady POWER/MODE LED if the system is operating normally. Look for the red ERROR LED or a stored SW1 code only if comfort is poor.

When to call a pro

Call for service if the system will not run, a breaker trips, or the red ERROR LED blinks at high speed.

Repair vs replace

This is a status display, not a repair-or-replace decision.

• Fujitsu AIRSTAGE H-series Compact Cassette 9,000 BTU R-32 208/230V (ACUH09KUAS / AOUH09KUAS1)

  AIRSTAGE H-series

• Fujitsu AIRSTAGE H-series Compact Cassette 12,000 BTU R-32 208/230V (ACUH12KUAS / AOUH12KUBS1)

  AIRSTAGE H-series

• Fujitsu AIRSTAGE H-series Floor-Mounted Console 12,000 BTU R-32 208/230V (AGUH12KUAS / AOUH12KUBS1)

  AIRSTAGE H-series

• Fujitsu AIRSTAGE H-series Mid Static Duct 12,000 BTU R-32 208/230V (ARUH12KUAS / AOUH12KUBS1)

  AIRSTAGE H-series

Parts for this line

The parts catalog for Fujitsu AIRSTAGE H-series lists 6 sourced replacement parts for this product line.

For your technician

Technician note: Section 13-1 identifies POWER/MODE as the power/mode indication; use Section 14-3 only when ERROR is active. Page context: Fujitsu maps this display to the AIRSTAGE H-series line; source: Fujitsu AOUH18-45KWAS/KWAH R-32 Design & Technical Manual; display convention: match the letter P, letter O, letter W, letter E, letter R, letter M, letter O, letter D, letter E, letter O, and letter N marker exactly before comparing neighboring codes.

Which systems show it

• Fujitsu Halcyon/AIRSTAGE R-32 AOUH18KWAS2, AOUH24KWAS3, AOUH36KWAS4, and AOUH45KWAS5 outdoor-unit manuals where Section 14-3 lists the same SW1/MONITOR error-code table.
• Fujitsu AOUH18KWAH2 and AOUH36KWAH4 XLTH sibling design manuals where the extracted Section 14-3 table matches the KWAS manuals.

Related troubleshooting

Use the symptom guide alongside the exact display code if the unit is flashing, cycling, or showing comfort symptoms.

Reset note

No repair action is needed for a steady POWER/MODE LED if the system is operating normally. Look for the red ERROR LED or a stored SW1 code only if comfort is poor.

Manual trigger

A steady green POWER/MODE LED means the outdoor board is powered, including while an error may also be present. It is not an error code by itself.

Related codes

Source

Next step