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3. Display does not light up. Check:
- if there is power to the unit;
- if mains cable is connected properly;
- fuses inside the electric panel.
4. Unit does not start operating when pressing ON/OFF key (the display is turned on): check
microdoor connection keeping in mind that the switch contact must be closed when the door
is closed.
Unsatisfactory efficiency of the unit:
If no defects are found in the unit check that: cold room doors are perfectly tight; there is no cold
dispersion; the cold room is used wisely; no unfrozen liquids or foodstuffs are placed in the low temperature room;
the evaporator is ice-free.
We recommend installation of the machines far from the doors especially when the cold room is expected to be
opened many times a day.
Label
Failure
Cause
Problem resolution
E1
Environment probe
(Pb1)
¤ values outside the
operation range
¤ failed / shortcircuited /
open probe
¤ check the type of probe
(NTC)
¤ check the wiring of probes
¤ replace the probe
E2
End of de-frosting
probe
(Pb2)
¤ values outside the
operation range
¤ failed / shortcircuited /
open probe
¤ check the type of probe
(NTC)
¤ check the wiring of probes
¤ replace the probe
AH1
Alarm of HIGH
ambient
temperature
¤exceeding of the preset
temperature (over the
maximum preset
differential)
¤ check the compressor
operation.
check of cell (open doors),
its seal, introduction of hot
product etc.
AL1
Alarm of LOW
ambient
temperature
exceeding of the preset
temperature (over the
minimum preset
differential)
¤ check the operation of the
control unit.
OPd
Alarm door open
¤ door open
Probe alarms ,
E1
- and ,
E2
- start some seconds after the fault in the related probe; they automatically stop some
seconds after the probe restarts normal operation. Check connections before replacing the probe.
Temperature alarms ,
AH1
- and ,
AL1
- automatically stop as soon as the thermostat temperature returns to normal
values and when defrost starts.
