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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, compres-
sor 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 en-
closure 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 compressor 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
thermostat 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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