CIBIN KUMA 04123N M Documentation Technique page 9

TROUBLESHOOTING
PROBLEM
1 When the machine is energised, the-
electronic regulator don't switches on.
2 The compressor buzzes intermittently
but will not start.
3 The display is lit and the regulator is in
the "on" position but the machine
will not start.
4 The compressor has stopped due to
termal cut-out switch intervention.
5 The compressor will not start and
there is no buzzing sound, although
power is being supplied to the mono-
bloc and the temperature setting on
the electronic regulator is lower than
that of the cold room.
6 Insufficient capacity: the machine
cannot bring the cold room tempera-
ture to the set value.
7 The auxiliary circuits (cold room ligh-
ting and door resistor), are not
working.
LIKELY CAUSE
1.1 The electronic regulator is in the OFF
position.
1.2 The electronic regulator is not con-
nected.
1.3 Faulty fuse.
2.1 The line voltage is lower than tole-
rance limits.
2.2 The electrical connections are wrong
because they have been tampered
with.
2.3 The electrical motor winding is
faulty.
3.1 The set point setting is above the
cold room temperature.
4.1 Condenser inefficient.
4.2 Insufficient air flow to the condenser.
4.3 Air recirculation on the condenser..
4.4 The motor winding has short circui-
ted or earthed.
5.1 The power supply to the l compres
sor has been cut off.
5.2 The electrical motor winding has
been cut off.
5.3 The electronic regulator relay switch
is faulty.
6.1 The Evaporator is full of ice.
6.2 The set parametersare incorrect due
to tampering.
6.3 The cold room door is being opened
too often.
6.4 The area where the system has been
installed is too hot.
6.5 The condenser is dirty.
6.6 The defrost solenoid valve coil has
been cut off.
6.7 The defrost control relay switch of
the electronic regulator is faulty.
7.1 Faulty fuse.
9
INTERVENTION
1.1 Switch on the electronic regulator.
1.2 Check that the connection terminals
of the electronic regulator have
been correctly inserted into their
respective seatings.
1.3 Replace the fuse.
2.1 Measure the input voltage of the
machine and if lower than the
tolerance limits, request an interven-
tion from your power supplier.
2.2 Restore the original connections, ref-
fering to the original electrical dia-
grams.
2.3 Check the winding circuit continuity
and if necessary, replace the com-
pressor.
3.1 Check the set point setting and if
necessary, decrease it.
4.1 Clean the fins unit and if necessary,
straighten any bent fins with comb.
4.2 Check the working order of the
fans, their rotation direction and
state.
4.3 Move the machine to a more suita
ble location.
4.4 Replace the compressor.
5.1 Disconnect the line at its ends and
check its circuit continuity
5.2 Check the continuity of the winding
circuit and if necessary, replace the
compressor..
5.3 Replace the electronic regulator.
6.1 Carry out a manual defrost cycle
until the evaporator is free of ice.
6.2 Restore the parameters as shown in
the relative table.
6.3 Limit cold room door opening.
6.4 Air the premises.
6.5 Clean the fins unit and if necessary,
straighten the fins with a comb.
6.6 Replace the coil.
6.7 Replace the electronic regulator.
7.1 Replace the fuse.
GB