HVACopediaFujitsu · Heat pump
68 Rush current limiting resistor temp rise error
What the control is telling you
The inrush limiting resistor in the outdoor unit overheated. Indoor lamps: OPERATION (green) flashes 6x, TIMER (orange) flashes 8x, ECONOMY (green) flashes fast nonstop; wired remote shows 68.
Applies to: Fujitsu ductless heat pumps: Fujitsu wall-mounted 7-15 (NA ASU/AOU type), Fujitsu slim duct ARU 7-18 (LL type)
Likely causes
- Frequent power cycling
- Board fault
Test and repair steps
- Avoid rapid power on/off.
- Check supply; replace the outdoor PCB if repeated.
Settings for these units
- Operating range and service space · Fujitsu multi-zone outdoor 18/24 type
Other codes on the same units
- 62 Outdoor main PCB error (EEPROM / model / micro comms)
- 63 Inverter error
- 64 PFC / active filter circuit error
- 65 IPM / trip terminal L error
- 71 Discharge temperature sensor error
- 72 Compressor temperature sensor error
- 73 Outdoor coil liquid temperature sensor error
- 74 Outdoor air temperature sensor error
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Source: Fujitsu Wall-mounted 7-9-12-15 (North American trilingual, UTY-RNNUM remotes; e.g. ASU9-12-15 RLF1-RLS familie.pdf - section 14 Error codes; 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.