Dealing with malfunctions
51
FIGHTER 1240
Close the shut-off valves in heating medium system.
Now open the drain valve (76). A small amount of
water runs out, however, to fully empty the heating
medium side requires the connector that joins the
heating medium side and the connection on the heat
pump VB-flow to be loosened a little to allow air to
enter so the remaining water can run out. When the
heating medium is empty the requisite service can be
carried out.
When replacing the brine pump or drive side or when
cleaning the pump, the shut-off valves in the collector
system should be closed. The hose between the top
of the evaporator and the brine pump is loosened on
the evaporator. The loose hose end can now be bent
down and emptied in a small bowl. Now loosen the
connection to KB-f a little to allow air to enter so the
heat pump’s collector side is emptied completely.
When the circuit is empty the requisite service can be
carried out.
Draining, heat medium side
Draining, collector side
NOTE!
The product's serial number should
always be stated with all
correspondence with NIBE.
______________
■ Shut down FIGHTER 1240 by turning the switch
(8) to 0.
■ Open the front cover.
■ Loosen the venting screw with a screwdriver. Hold
a cloth around the screwdriver blade as a certain
amount of water may run out.
■ Insert a screwdriver and turn the pump rotor.
■ Screw in the venting screw.
■ Start FIGHTER 1240 and check whether the circu-
lation pump runs.
It is usually easier to start the circulation pump with
FIGHTER 1240 running, switch (8) set to 1. If helping
the circulation pump to start is performed with FIGHT-
ER 1240 running, be prepared for the screwdriver to
jerk when the pump starts.
Helping the circulation pump
to start
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