Fujitsu General 410A Error 51: Indoor unit fan motor error

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

Error code51

Indoor unit fan motor error code 51 indicates the fan's actual frequency is below one-third of its target for more than 56 seconds. The manual's first action is: “Check rotation of fan.”

Model
Fujitsu General 410A
Display shows
Indoor unit fan motor error (51)
Type
Error code
Source
Manual p. 4

What 51 means

Indoor unit fan motor error p. 4

Common causes

  • -Check ambient temperature around motor. p. 4
  • -Check indoor unit fan motor resistance values. p. 4
  • -Indoor Unit Fan Motor Error - When the condition that actual frequency of indoor fan is below 1/3 of target frequency is continued more than 56 seconds. p. 4
  • -Replace controller PCB. p. 4
  • When the condition that actual frequency of indoor fan is below 1/3 of target frequency is continued more than 56 seconds. p. 4

What to do

  1. Check rotation of fan. p. 4
  2. (Ref. Service Tip #008-Fan Motor Check and/or "Fan Motor Check" in Zendesk Help Center) p. 4
  3. -Check rotation of fan. p. 4
  4. -Check indoor unit fan motor resistance values. p. 4
  5. -Ref. Service Tip #008-Fan Motor Check and/or "Fan Motor Check" under "Troubleshooting by Error Code" type in Zendesk Help Center. p. 4
  6. -Replace controller PCB. (Ref. Service Tip #008-Fan Motor Check and/or "Fan Motor Check" under "Troubleshooting by Error Code" Type In Zendesk Help Center) p. 4

If 51 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 4 All 410A error codes Manual details & download

This page summarises what the manufacturer’s manual says about 51; 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.