Nibe VVM 500 Service Manual

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 500Chapter 6 | Troubleshooting24

Nibe VVM 500 Specifications

General

Type	Indoor module
Volume	500 liters
Integrated immersion heater	Yes
Energy efficiency class, DHW preparation	A
Compatible with	NIBE air/water heat pumps
Refrigerant	Not applicable
Cooling Capacity	Matches the heat pump it is connected to.