Nibe SPLIT ACVM270 - Page 40

E38 - S. fault Tho-A
Is the outdoor sensor (Tho-A)
correctly connected?
YES
YES
Replace the control board.
Action.
Defective sensor - replace.
Are the characteristics of the
outdoor sensor (Tho-A) OK?
NO
NO
E39 - S. fault Tho-D
Is the hot gas sensor (Tho-D)
correctly connected?
YES
YES
Replace the control board.
Action.
Defective sensor - replace.
Are the characteristics of the hot
gas sensor (Tho-D) OK?
NO
NO
NIBE SPLIT ACVM270Chapter 5 | Troubleshooting40