Nibe VVM 500 Service Manual

Electronics
Immersion heater card (AA1)
IndicationLED
A steady light means that the relevant
relay is engaged.
K1 - K9: Or-
ange
FunctionOutput
Supply L1K1
Supply L2K2
Supply L3K3
Immersion heater EB1 2 kWK4
Not usedK5
Immersion heater EB1 2 kWK6
Immersion heater EB1 only at 3 kWK7
Immersion heater EB1 2 kWK8
Immersion heater EB1 1 kW or 3 kWK9
Base card (AA2)
IndicationLED
A steady light means that 12 V is OK.Power:
Green
Flashing once/sec. Indicates that the
processor is OK.
Run: Green
Flashes irregularly during communication.Com: Green
Continuous light during active output.PWM1: Or-
ange
Continuous light during active output.PWM2: Or-
ange
A steady light means that the relevant
relay is engaged.
K1 - K4: Or-
ange
Outputs
FunctionOutput
Control signal HM pump (GP1)PWM1
Control signal charge pump (GP12)PWM2
Reversing valve (QN10).K1
Charge pump (GP12).K2
Circ-pump (GP1).K3
FunctionOutput
No function.K4
Input circuit board (AA3)
FunctionInputs
Current sensor input (GND).X4-1
Current sensor input (BE1).X4-2
Current sensor input (BE2).X4-3
Current sensor input (BE3).X4-4
Outdoor sensor input (BT1).X6:1- 2
Room sensor input (BT50).X6:3-4
AUX1X6:9-10
AUX2X6:11-12
AUX3X6:13-14
AUX4X6:15-16
AUX5X6:17-18
FunctionOutput
Potential free relay CommonK1X7:1
Potential free relay NOK1X7:2
Potential free relay NCK1X7:3
Display unit (AA4)
The display unit consists of:
■
a colour screen where all information is displayed.
■
a status lamp.
■
navigation buttons (OK button, Back button and
Control knob).
■
a USB socket.
■
a service socket.
FunctionStatus lamp
Normal functionLights green
Emergency mode activatedLights yellow
Alarm trippedLights red
13Chapter 5 | Component descriptionNIBE™ VVM 500

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.