Fujitsu General 410A Error 77: Heat sink thermistor error

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

Error code77

Heat sink thermistor error indicates the heat sink temperature thermistor is open or shorted. The manual's first action is: “-Check for erroneous connection or removed connector.”

Model
Fujitsu General 410A
Display shows
Heat sink thermistor error (77)
Type
Error code
Source
Manual p. 5

What 77 means

Heat sink thermistor error p. 5

Common causes

  • When heat-sink temperature thermistor is open or a short-circuit is detected at power up or while running the compressor. p. 5

What to do

  1. -Check for erroneous connection or removed connector. p. 5
  2. -Check resistance of thermistor. (Ref. Thermistor Resistance Chart) p. 5

If 77 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 5 All 410A error codes Manual details & download

This page summarises what the manufacturer’s manual says about 77; 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.