DEEP-FREEZER AND STORAGE RANGE
page 30 out of 37
5.3
Malfunctions / Maintenance assistance
Failure detected
Possible cause
Verification
Solution
No electric control
works.
No power
Test the feeding circuit to
the voltmeter.
General fuses defective.
Replace after checking
their ratings.
The display of
temperature indicates a
defect of probe.
Defect of the probe of:
-
room temperature,
-
evaporator temperature,
-
thermosensor.
-
Check connections.
-
Check the value of
thermosensor probe
(PT100).
Replace the defective
probe.
The temperature is
higher than the set
point but the
refrigerating unit does
not work.
The electromagnetic valve is not
powered
Check the contact of the
regulator (check the
parameters).
In case of non-closure,
change the module.
The electromagnetic valve is
powered
Check the pressure of the
circuit LP.
Control the operation of
the pressure controller LP
The compressor does
not function and the
indicator of defect is
enlightened.
magneto-thermal circuit opened
Check if the magneto-
thermal circuit breaker is
indeed open.
Close the circuit breaker
after having checked and
eventually regulated the
calibration value.
The compressor does
not work
Contactor coil is not powered.
Test the control circuit.
Adjust or change the
control with default.
The ventilator does not
turn.
Terminals of ventilation not supplied
Control wiring while
reporting to the electric
diagram.
A door contact is in an open position
Control the correct
operation of the door
contact.
Change the door contact
with default.
Poor technical parameters of the
control.
Check the technical
parameters of the control.
Program the parameter
Stop T° ventilation
correctly.
Propeller mechanically blocked.
Remove obstacle or
change the propeller.
An indicator lamp does
not ignite.
Defect of the keyboard, display card
or the BUS cable.
Test the keyboard with a
new RJ45 BUS cable
Change the component
with default.
The defrosting do not
occur
The defrosting times are not
programmed
Control the defrosting
hours..
The hour set in the control is not
correct.
Control the correct real
hour.
The defrosting switch
does not work
Bad technical parameters in the
control.
Check the technical
parameters of the control
Program the parameter
Stop T° ventilation,
Temperature end of
Defrosting, or Max defrost
duration correctly.
Check if the Klixon
security is really in a
closed position
Change the Klixon if it is
opened
Contactor coil is not powered.
Check the controls of
protection.
The defrosting do not
occur. The defrosting
switch works.
Electric resistances do not heat.
Test the correspondent
circuit.
Change the component
with default.
Check the bodies
protection.
