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Troubleshooting
Malfunction
Problem and Condition
It fails to cool.
The internal fan works, the external
fan and compressor do not work.
No component works.
Compressor, external and internal
fan work.
Compressor and external fan work,
internal fan does not work.
External and internal fan work,
compressor does not work.
It is not cooling
External and internal fans work,
enough.
compressor works all the times.
Inside fan works, external fan and
compressor work irregularly
External and internal fans work,
compressor works irregularly.
Too much
Enclosure door open.
condensate
forming.
Enclosure door closed.
Cause
The temperature inside the enclo-
sure is lower than what is set on
the adjustment thermostat.
The adjustment thermostat has
failed.
No electricity getting to the unit.
Cooling unit empty of fluid.
Compressor mechanical failure.
Internal fan capacitor failed.
Internal fan failed.
Compressor's amperometric
protector failed (external to the
compressor, where present).
Relay or PTC for compressor
starting failed.
Capacitor for compressor starting
failed (where present).
Compressor motor electrical
failure.
High pressure safety switch
failed.
Compressor contactor failed
(where present).
Cooling unit under sized for the heat
dissipated inside the enclosure.
insufficient gas in the cooling
unit.
High pressure safety switch
triggered:
- Ambient temperature over the
maximum working limit;
- Heat exchanger coil (condenser)
either dirty or clogged.
Thermal protector inside the com-
pressor triggered:
- Ambient temperature over the
maximum working limit;
- Heat exchanger coil (condenser)
either dirty or clogged.
Too much ambient air inside the
enclosure.
Enclosure protection level is
below IP54.
The enclosure/cooling unit
connecting seal has been fitted
incorrectly.
14
Remedy
This is not a malfunction of the cooling unit.
To verify functioning when testing, lower the thermos-
tat setting until the compressor and external fan start
working and then reset the thermostat.
Change the adjustment thermostat.
This is not a malfunction of the cooling unit:
- Make sure the power cable has been connected well
to the terminals;
- Check that the cubicle doors and switches are
closed.
Call a refrigeration expert or the Manufacturer's
Technical Assistance Service.
Call a refrigeration expert or the Manufacturer's
Technical Assistance Service.
Change the internal fan's capacitor.
Change the internal fan.
Change the amperometric protector
(Where present).
Change the relay or PTC for compressor starting.
Change the capacitor for compressor starting.
Call a refrigeration expert or the Manufacturer's
Technical Assistance Service.
Call a refrigeration expert or the Manufacturer's
Technical Assistance Service.
Change the contactor.
Change the cooling unit with another of greater
capacity.
Call a refrigeration expert or the Manufacturer's
Technical Assistance Service.
- Ventilate the premises where the enclosure is
installed to keep ambient temperature lower.
- Clean the exchanger with compressed air
and detergent.
- Ventilate the premises where the enclosure is
installed to keep ambient temperature lower.
- Clean the coil with compressed air and detergent.
This is not a malfunction of the cooling unit.
Close the enclosure door or disable the cooling unit.
This is not a malfunction of the cooling unit.
Seal enclosure openings, e.g. for passage and upward
path of wires.
Check seal and remedy.
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