NOTE
Servicing and maintenance should only be car-
ried out by persons with the necessary expertise.
When replacing components on F470 only re-
placement parts from NIBE may be used.
Maintenance
Inform the user of necessary maintenance action.
Cleaning the overflow cup/floor drain
Regularly check that the overflow cup and any floor
drains are not blocked; water must be able to run
through freely. Clean, if necessary.
NOTE
If the overflow cup or floor drain is blocked,
water can run over onto the floor of the install-
ation area. To prevent damage to the building
the floor coating must be considered. A water-
proof floor or floor membrane is recommended.
Service actions
Emergency mode
Emergency mode is used in event of operational interfer-
ence and in conjunction with service.
Emergency mode is activated by setting switch (SF1) in
mode " ". This means that:
■
The status lamp illuminates yellow.
■
The display is not lit and the control computer is not
connected.
■
The temperature in the heating section is controlled
by a fixed thermostat (BT30) at 63°C.
■
The compressor and the fans are off and only the
heating medium pump and the electric additional heat
are active. The additional heat power in emergency
mode is set in the immersion heater board (AA1). See
page 26 for instructions.
■
The automatic heating control system is not operation-
al, so manual shunt operation is required. This is done
by turning the adjustment screw on the shunt motor
(MA1to "manual mode" and then turning the shunt
lever to the desired position.
Draining the water heater
The water heater can be drained via the safety valve (FL1)
or via the overflow cup (WM1).
1.
Disconnect the overflow pipe from the safety valve
(FL1) and connect a hose to a draining pump instead.
If a draining pump is not available, the water can be
released into the overflow cup (WM1).
2.
Open the safety valve (FL1).
3.
Open a hot water tap to let air into the system. If this
is not sufficient, detach the pipe connection (XL4)
on the hot water side and ensure that air is entering.
Draining the climate system
In order to carry out service on the climate system, it may
be easier to drain the system first.
NOTE
There may be some hot water when draining
the heating medium side/climate system. There
is a risk of scalding.
The hot water can be drained through the safety valve
(FL2) via the overflow cup (WM1) or through a hose that
is connected to the safety valve’s (FL2) outlet.
1.
Open the safety valve (FL2).
2.
Set the vent valve for the climate system (QM20) in
the open position for air supply.
NIBE F470Chapter 9 | Service50
9 Service
To Next Page
Loading...
Need help?
General
