Nibe VVM 500 Service Manual

Alarm 70 - perm. com.error input card
Is the wiring connector (W105)
correctly connected on input circuit
board (AA3-X2) and on the display
card (AA4-X8)?
YES
YES
Has the fault been corrected?
Replace the input circuit board
(AA3).
Replace the display card (AA4).
NO
Action.
NO
OK.
NIBE™ VVM 500Chapter 6 | Troubleshooting26

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.