Fujitsu · Heat pump

14 Network communication error

Medium severity Fujitsu ductless split/multi/VRF (general code list)

What the control is telling you

VRF network transmission fault between units on the system network. Indoor lamps: OPERATION (green) flashes 1x, TIMER (orange) flashes 4x, ECONOMY (green) flashes fast nonstop; wired remote shows 14.

Applies to: Fujitsu ductless heat pumps: Fujitsu ductless split/multi/VRF (general code list)

Likely causes

Network wiring fault
Address or termination problem
PCB fault

Test and repair steps

Check the network (transmission) wiring and terminations.
Check unit addresses.
Cycle power to the whole system; replace the PCB that does not communicate.

Settings for these units

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

Other codes on the same units

6A Display PCB micro communication error
9A Expansion valve coil error
9U Outdoor unit error (general)
11 Serial communication error (indoor/outdoor)
12 Wired remote controller communication error
15 Check run unfinished / airflow auto-adjust error
16 Peripheral unit / transmission PCB connection error
21 Address / refrigerant circuit setting error

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Source: Fujitsu All Fujitsu split - multi - VRF (generic code list) codes.pdf - section error code table (indoor LED flashes). 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.