Dealing with malfunctions
FIGHTER 410P
For the Installer
24
In the “ ” position the heat pump's compressor and
electronic control are disabled. The fans are not opera-
tional to prevent the risk of freezing in the supply air
battery.
The numerical display is off The automatic heating
control system is not operational, so manual shunt
operation is required. This is done by turning the
adjuster screw to manual mode and then turning the
shunt lever to the required position.
The immersion heater is controlled by a separate ther-
mostat, which is activated by the contactors (10) and
(67). The thermostat’s breaking value is approximately
68 °C
The display can remain unlit when returning to normal
mode. This is due to the boiler temperature being
above the heat pump's normal working area. The dis-
play comes on when the boiler temperature drops
once again to normal.
Switch position “ ”
If the operating disturbance cannot be rectified by means of the above an installation
engineer should be called.
If necessary set the Switch to “ ” (manual shunt operation necessary).
■ Automatic heating control system settings not cor-
rect.
High room temperature
NOTE! The hot water capacity can be increased for
24 hours by pressing in the button (18).
■ Large amounts of hot water were used.
■ Circuit or main MCB tripped.
■ Possible earth circuit-breaker tripped.
■ Switch (8) set to “0”.
■ MCB (7) tripped. See the section Dealing with mal-
functions — Resetting the miniature circuit break-
ers.
■ Tripped temperature limiter (6). (
May only be carried
out under the supervision of a qualified installer.)
■ Wrong operating mode selected with button (25).
■ Closed or throttled filler valve (46) on the water
heater.
Low temperature or a lack of
hot water
■ Circuit or main MCB tripped.
■ Possible earth circuit-breaker tripped.
■ MCB (7) tripped. See the section Dealing with mal-
functions — Resetting the miniature circuit break-
ers.
■ Tripped temperature limiter (6). (
May only be carried
out under the supervision of a qualified installer).
■ Incorrect values set on the automatic heating con-
trol system.
■ Circulation pump (16) stopped. See the section
Dealing with malfunctions — Starting the pump.
■ Air in boiler or system.
■ Close valves (44) and (50) in the radiator circuit.
■ Incorrect initial pressure in the expansion vessel,
indicated by large pressure variations on the pres-
sure gauge (42), contact the installer.
■ Wrong operating mode selected with button (25).
■ Defrosting position, lamp (31) lights continuously,
see the section Indications on the display.
■ Filter (63) and (66) clogged (possible replace-
ment).
■ Exhaust air device blocked or throttled down too
much.
■ Circuit or main MCB tripped.
■ Possible earth circuit-breaker tripped.
■ MCB (7) tripped. See the section Dealing with mal-
functions — Resetting the miniature circuit break-
ers.
■ Clogged intake grill for the outdoor air.
Low room temperature
Low or a lack of ventilation
In the event of malfunctions or operating disturbances first
check the points below:
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