Fujitsu · Heat pump

61 Outdoor reverse / missing phase or wiring error

High severity Fujitsu slim duct ARU 7-18 (LL type)

What the control is telling you

Outdoor unit power phase or wiring fault. Indoor lamps: OPERATION (green) flashes 6x, TIMER (orange) flashes 1x, ECONOMY (green) flashes fast nonstop; wired remote shows 61.

Applies to: Fujitsu ductless heat pumps: Fujitsu slim duct ARU 7-18 (LL type)

Likely causes

Phase reversed or missing (3-phase)
Wiring error

Test and repair steps

Warning: Isolate power before checking.
Check supply phases and terminal wiring.

Settings for these units

Operating range and service space · Fujitsu multi-zone outdoor 18/24 type

Other codes on the same units

51 Indoor fan motor error
53 Drain pump error
57 Damper error
62 Outdoor main PCB error (EEPROM / model / micro comms)
63 Inverter error
64 PFC / active filter circuit error
65 IPM / trip terminal L error
68 Rush current limiting resistor temp rise error

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Source: Fujitsu Slim duct AR07-09-12-14-18 (ARU-ARYG LL-type equivalent) installation P-N 9381858064.pdf - section 14 Error codes. Summarized in our own words; check the original manual for your model.

Homeowner looking at this code? See what it means for you and when to call a technician.

For licensed technicians. Gas, electrical and refrigerant work must be done by a qualified, licensed person. Shut off power and gas before servicing, never bypass a safety control, and follow the manufacturer’s manual for the exact model; it and local codes always take priority. HVACopedia is not affiliated with any manufacturer; brand and model names only identify the equipment.