Nibe VVM 310 - Page 26

Alarm 2, 3, 6, 31 - sensor fault
Is the actual sensor correctly
connected?
YES
YES
YES
Is the wiring connector (W103)
correctly connected on base card
(AA2)?
Are the characteristics for the
sensor OK? (See "Data for
temperature sensor" section.)
Action.
NO
NO
Defective sensor. Replace.
Are the characteristics for the
sensor OK, measured from wiring
connector (W103) in the base card
(AA2)?
(See the "Wiring diagram"
section.)
Action.
NO
Check wiring and switches.
NO
Is the output voltage from the card
correct? (See "Data for
temperature sensor" section.)
Defective base card (AA2).
Replace.
YES
Check wiring and switches.
NO
YES
NIBE™ VVM 310Chapter 6 | Troubleshooting24