TROUBLESHOOTING AND CORRECTIVE MEASURES FOR THE SENSOR FUNCTION
Sensor function
gives no water
Transformer fault set, AC not
selected and activated on the
circuit board.
The water is shut off
Poor or batteries turned the
wrong way
Sensor distance too short
The solenoid valve is not
working
Dirt in the solenoid valve
Inlet filter clogged
Fault in the electronics
Check that the transformer is set to 12V. And
that the circuit board has AC selected.
Check the water connection
Check the batteries, 4 ea R6 á 1.5 volt, which
must be mounted according to the instructions
in the battery compartment
Try moving your hand closer to the sensor eyes
Activate the sensor eyes and listen for a click-
ing sound
see above
Examine the inlet filter mounted between the
solenoid valve and valve block
Conduct a ”self-test” as described above
Set the Transformer to 12V. Select AC.
Press RESET.
Open any shut offs
Replace batteries, or correct the position
of the battery. NOTE: Use alkaline bat-
teries!
Adjust the sensor gap
If you hear no sound: Replace the
solenoid coil or if necessary the entire
solenoid valve
If you hear a clicking sound - clean the
solenoid valve or replace the membrane
disk, see figure below
Clean the inlet filter
Replace the sensor eyes or circuit board
POSSIBLE CAUSE
TROUBLESHOOTING
CORRECTIVE MEASURE
PROBLEMS
The tap will not
turn off
Before additional tests can be made, establish whether the fault is electrical or mechanical by disconnecting the batteries.
If the tap shuts off with disconnected current, the fault is electrical. If the tap continues to run there is a mechanical fault.
Mechanical fault - dirt in the
solenoid valve
Electrical fault - the elec-
tronics prevent the solenoid
valve from shutting off
-
Conduct a ”self-test” as described above
Dismantle the solenoid valve for clea-
ning, see figure below
Replace the sensor eyes or circuit board
Dirt in the solenoid valve, or
leaky membrane disk
Screw apart the solenoid valve and look for dirt
and check the membrane disk
Clean and where necessary replace the
membrane disk, see figure below
The tap is dripping
The sensor distance is too far -
Adjust the sensor distance to about 5
cm in front of the sensor eyes
The tap opens/
shuts off con-
stantly
The sensor eyes are defective The sensor distance setting is not reacting
Replace the sensor eyes
Normal function
When activating the sensor function, a red flashing light is to be visible on the indication lamp (under the sensor eyes) just when the flow
starts.
Test:
MoraTemp Duo has a built-in function for self-testing in the electronics unit. This is what you do: Open the control box cover and pull out the
circuit board. Press the ”RESET” button briefly. The result should then be a red flashing light both from the indication lamp on the tap and from
the circuit board, a clicking sound from the solenoid valve and the tap should open. Then a green flashing light on the circuit board, clicking
from the solenoid valve, the tap shuts off, then two red flashes from the indication lamp and on the circuit board. This test confirms that the
electronics are OK.
Clean the
holes when
necessary
Membrane
disk
Maintenance and cleaning
The maintenance normally required involves, for the most part, keeping the sensor
eyes clean. Use no abrasive cleaning agent or strong substances that might
damage the lenses. If the water contains a lot of particles and dirt, you might
sometimes need to remove and clean the solenoid valve’s water affected parts,
and the dirt filter that is fitted between the valve block and solenoid valve. Be
particularly careful with the small holes in the membrane disk and the surfaces
to which they seal.
Strong sunlight aimed directly at the sensor eyes may also disturb the function.
The interval between battery replacement varies a lot, but for normal use working
life should be year or so.
Always use alkaline batteries for best performance.
When assem-
bling check
that this hole is
correctly aligned
with the cor-
responding hole
on the solenoid
valve.
Reset to AC but
nothing is working
4
07.04. MA nr 1001032
INSTRUCTION