Nibe F2040 Technical Manual

Pump down function
This function is to collect the refrigerant in the receiver
when replacing the condenser.
Indoor unit VVM 310 / VVM 320 / VVM 500
1.
Switch off the indoor unit using the switch, to reset
all time conditions.
2.
Start and select operating mode. Add. heat only in
menu 4.2.
F2040
1.
Remove the cover and front panel for the F2040.
2.
Close fluid line valve 3/8’ (QM35).
3.
Press SW9 (F2040-8), SW1 (F2040-12/16) (see im-
age p.29) on the control board for at least 2
seconds, within 10 minutes of the indoor unit being
set to "additional heat only".
4.
The compressor will shortly start in cooling mode
process 2, then the compressor speed is locked at
62 rps for F2040-8, 55 rps for F2040-12 and 45 rps
for F2040-16.
- Both LED flash (red/green) continuously.
- Both expansion valves are fully open.
5.
The function stops when the LP is lower than
0.087 MPa (0.87 bar) for 5 seconds or more.
6.
The process from point 2 is repeated again when
the pressure rises above 0.087 MPa (0.87 bar)
7.
When the pressure no longer rises after pump-
down, close the suction gas valve 5/8’ (QM36)
when the LED 2 lights with constant red light and
LED 1 flashes green.
Defrosting/Cooling
Tho-D
Tho-S
LPT
205
Tho-
R1
Tho-R2
EEV-H
EEV-C
FM01
CM
63H1
BP4
BT3
BT12
EP2
BT 15
HS1
Tho-A
Heating
QM36
QM35
QM 35
QM36
NIBE™ F2040Chapter 4 | Description of functions28

Nibe F2040 Specifications

General

Type	Air/water heat pump
Refrigerant	R410A
Operating Temperature Range Heating	-20°C to 35°C
Operating Temperature Range Cooling	10°C to 46°C
Sound Power Level	56-62 dB(A) (depending on model)