Panasonic F 90 error code

What it means

Panasonic lists F 90 as power factor correction (PFC) circuit protection. This is an outdoor power-electronics protection fault.

Urgency

Likely causes

1. Outdoor PFC or inverter power board fault
2. Low/high supply voltage, surge, or unstable power
3. Compressor or inverter load is stressing the PFC circuit
4. Loose or damaged outdoor power wiring/connectors

Homeowner fix

Turn the system off and power cycle once if safe. Do not open electrical panels or keep resetting the unit.

When to call a pro

Call an authorized Panasonic dealer if F 90 returns. Tell them Panasonic lists F 90 as power factor correction (PFC) circuit protection.

Repair vs replace

PFC and inverter repairs can be expensive; compare major board repair with replacement on older out-of-warranty systems.

• Panasonic ClimaPure XZ Series 9,000 BTU R-32 208/230V (CS-XZ9AKUAW / CU-XZ9AKUAC)

  ClimaPure XZ Series

• Panasonic ClimaPure XZ Series 12,000 BTU R-32 208/230V (CS-XZ12AKUAW / CU-XZ12AKUAC)

  ClimaPure XZ Series

• Panasonic ClimaPure XZ Series 15,000 BTU R-32 208/230V (CS-XZ15AKUAW / CU-XZ15AKUAC)

  ClimaPure XZ Series

• Panasonic ClimaPure XZ Series 18,000 BTU R-32 208/230V (CS-XZ18AKUAW / CU-XZ18AKUAC)

  ClimaPure XZ Series

For your technician

Official Panasonic diagnostic display: F 90 - Power factor correction (PFC) circuit protection. Page context: Panasonic maps this display to the ClimaPure XZ Series line; source: Panasonic Operating Instructions Air Conditioner CS-XZ, CS-MXZ, CU-XZ, CU-xZxxABUC and CU-xZxxBBUC Series, English, ACXF55-35103; display convention: match the letter F and ninety marker exactly before comparing neighboring codes.

Which systems show it

ClimaPure XZ Series

Related troubleshooting

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

Related codes

Source

Next step