Nibe F2120-8 - Control System and Operation; Control Overview and LED Status

General
F2120 is equipped with an internal electronic controller
that handles all functions necessary for operation of
the heat pump, e. g. defrosting, stop at max/min tem-
perature, connection of the compressor heater, and
protective functions during operation.
Temperatures, number of starts and run time, are read
off in the indoor module/control module.
The integrated control shows information via status-
LEDs and can be used during servicing.
Under normal operating conditions the home owner
does not need to have access to the controller.
F2120 communicates with the NIBE indoor module/con-
trol module, which means that all settings and meas-
urement values from F2120 are adjusted and read off
on the indoor module/control module.
LED status
The base board (AA2) has six status LEDs for easy con-
trol and fault tracing.
ExplanationStateLED
Control board without
power
Not litPWR
(green)
Control board power onContinuous
light
CPU without powerNot litCPU
CPU runningFlashes(green)
CPU running incorrectlyContinuous
light
No communication with in-
door module/control mod-
ule
Not litEXT COMM
(green)
Communication with in-
door module/control mod-
ule
Flashes
No communication with in-
verter
Not litINT COMM
(green)
Communication with invert-
er
Flashes
No defrosting or protection
active
Not litDEFROST
(green)
Some protection is activeFlashes
Defrosting in progressContinuous
light
No errorsNot litERROR
(red)
B-alarm, activeFlashes
A-alarm, activeContinuous
light
Relay in de-energised posi-
tion
Not litK1, K2, K3,
K4, K5
Relay engagedContinuous
light
No functionN-RELAY
ExplanationStateLED
No functionCOMPR. ON
Master control
To control F2120, a NIBE indoor module/control mod-
ule is required, which calls upon F2120 according to
demand. All settings for F2120 are made via the indoor
module/control module. It also shows the status and
sensor values from F2120.
UnitParamet-
er space
ValueDescription
°C4 – 144Cut-out value activation
passive defrosting
°C-5 – 5-3Start temperature BT16 to
calculate index
(1 / 0)Yes / NoNoPermit fan de-icing
(1 / 0)Yes / NoNoPermit silent mode
(1 / 0)Yes / NoNoPermit defrost more often
33Chapter 7 | Control - IntroductionNIBE™ F2120
7 Control - Introduction