Nibe SPLIT ACVM270 - Page 50

E53 - S. fault Tho-S
Is the sensor for the suction gas
temperature (Tho-S) correctly
connected?
YES
YES
Replace the control board.
Action.
Replace the sensor.
Are the characteristics for the
suction gas sensor OK?
NO
NO
NIBE SPLIT ACVM270Chapter 5 | Troubleshooting50