Fujitsu General 410A Error 18: CT error

Fujitsu General 410A · taken from the manufacturer’s manual, pages cited

Error code18

Current transformer error when current drops to zero amps within one minute of compressor start. The manual's first action is: “-Check if CT wire is open. (Ref. Service Manual for schematic on each model) -Controller PCB defective.”

Model
Fujitsu General 410A
Display shows
CT error (18)
Type
Error code
Source
Manual p. 24

What 18 means

CT error p. 25

Common causes

  • Current transformer error - The current value during the operation is lower than 1 minute from starting up the compressor drops to zero (0) amps. p. 25
  • CT error p. 25

What to do

  1. -Check if CT wire is open. (Ref. Service Manual for schematic on each model) -Controller PCB defective. p. 25
  2. 3 flashes p. 25

If 18 is still not resolved

The manual gives no further instruction for this code. Open the code table in the PDF or contact Fujitsu General service.

Open the manual at page 24 All 410A error codes Manual details & download

This page summarises what the manufacturer’s manual says about 18; each statement links to the page it comes from, and quoted lines are copied word for word. It is not a substitute for the manual or for a qualified installer. ManualLib is not affiliated with Fujitsu General. Found a mistake? Report an error.