Dealing with malfunctions
FIGHTER 1240
48
Alarm LP
This information is shown when the low pressure
switch in FIGHTER 1240 has tripped. The compressor
is blocked and FIGHTER 1240 switches to winter
mode, only additional heat without hot water.
This may be due to:
■ Bad circulation in collector system due to inferior
venting/low pressure or ice (if ice has formed the
brine pump (35) will be warm).
■ Brine pump (35) malfunction.
■ Iced evaporator due to too low antifreeze concen-
tration.
■ Leakage in the collector circuit.
The background lighting on the display flashes with an
alarm and the following information is shown depend-
ing on the fault. An alarm log is created with each
alarm containing a number of temperatures, times and
the status of outputs. The four alarms are saved on
menu 9.5.0 — 9.8.0.
The following alarms block hot water charging to draw
attention to the alarm. The operating mode switches to
winter mode and additional heat engages.
Alarm HP Alarm LP
Alarm MP Alarm BR
Alarm flow 2 Alarm HW
Brine level
When the alarm cannot be reset using the switch (8),
the operating mode, Only additional heat, can be acti-
vated in menu 9.2.4 to have access to hot water gain.
-- ALARM LP--
1.0
Alarm HP
This information is shown when the high pressure
switch in FIGHTER 1240 has tripped. The compressor
is blocked and FIGHTER 1240 switches to winter
mode, only additional heat without hot water.
This may be due to:
■ No or low flow on the heating medium pump (16).
■ Closed thermostat valves.
■ Too high value in menu 1.5 and/or menu 1.7 for the
stop temperature. The alarm temperature varies
with the heat pump's operating conditions.
-- ALARM HP--
1.0
Brine level (accessory)
Shows that the level or pressure in the collector circuit
is low. The compressor is blocked and FIGHTER
1240 switches to winter mode, only additional heat
without hot water.
This may be due to:
■ Leakage in the collector circuit.
-BRINE LEVEL-
1.0
Alarm MP
Shows when the motor cut-out on the compressor has
tripped. The compressor is blocked and FIGHTER
1240 switches to winter mode, only additional heat
without hot water.
This may be due to:
■ Dropped phase due to tripped fuses
■ Incorrect setting on the motor cut-out.
-- ALARM MP--
1.0
-- ALARM BR--
1.0
Alarm BR
Shows when the brine's return temperature is lower
than the set value in menu 5.1. Factory setting -8. Not
indicated when menu 5.2 is set to automatic return
YES. The compressor is blocked and FIGHTER 1240
switches to winter mode, only additional heat without
hot water.
This may be due to:
■ Too low flow on the brine.
■ Temperature sensor damaged/missing.
If the operating disturbance cannot be rectified by means of the above,
an installation engineer should be called.
Alarm indications on the display
The following alarms stop the compressor and brine
pump. The alarms can only be acknowledged by
switching off the heat pump for a few seconds and
then started again. This is done using switch (8).
Alarm phase sequence
This information is displayed if the compressor's direc-
tion of rotation is incorrect.
ALARM PHASE SEQ.
1.0
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