LEGRAND 0 353 46, Manual

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LE06993AA-02
Troubleshooting
Malfunction Problem and Condition Cause Remedy
It fails to cool. The internal fan works, the external
fan and compressor do not work. The temperature inside the enclo-
sure is lower than what is set on
the adjustment thermostat. 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.
The adjustment thermostat has
failed. Change the adjustment thermostat.
No component works. No electricity getting to the unit. 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.
Compressor, external and internal
fan work. Cooling unit empty of fluid. Call a refrigeration expert or the Manufacturer’s
Technical Assistance Service.
Compressor mechanical failure. Call a refrigeration expert or the Manufacturer’s
Technical Assistance Service.
Compressor and external fan work,
internal fan does not work. Internal fan capacitor failed. Change the internal fan’s capacitor.
Internal fan failed. Change the internal fan.
External and internal fan work,
compressor does not work. Compressor’s amperometric
protector failed (external to the
compressor, where present). Change the amperometric protector
(Where present).
Relay or PTC for compressor
starting failed. Change the relay or PTC for compressor starting.
Capacitor for compressor starting
failed (where present). Change the capacitor for compressor starting.
Compressor motor electrical
failure. Call a refrigeration expert or the Manufacturer’s
Technical Assistance Service.
High pressure safety switch
failed. Call a refrigeration expert or the Manufacturer’s
Technical Assistance Service.
Compressor contactor failed
(where present). Change the contactor.
It is not cooling
enough. External and internal fans work,
compressor works all the times. Cooling unit under sized for the heat
dissipated inside the enclosure. Change the cooling unit with another of greater
capacity.
Inside fan works, external fan and
compressor work irregularly insufficient gas in the cooling
unit. Call a refrigeration expert or the Manufacturer’s
Technical Assistance Service.
External and internal fans work,
compressor works irregularly. High pressure safety switch
triggered:
- Ambient temperature over the
maximum working limit;
- Heat exchanger coil (condenser)
either dirty or clogged.
- Ventilate the premises where the enclosure is
installed to keep ambient temperature lower.
- Clean the exchanger with compressed air
and detergent.
Thermal protector inside the com-
pressor triggered:
- Ambient temperature over the
maximum working limit;
- Heat exchanger coil (condenser)
either dirty or clogged.
- Ventilate the premises where the enclosure is
installed to keep ambient temperature lower.
- Clean the coil with compressed air and detergent.
Too much
condensate
forming. Enclosure door open. Too much ambient air inside the
enclosure. This is not a malfunction of the cooling unit.
Close the enclosure door or disable the cooling unit.
Enclosure door closed. Enclosure protection level is
below IP54. This is not a malfunction of the cooling unit.
Seal enclosure openings, e.g. for passage and upward
path of wires.
The enclosure/cooling unit
connecting seal has been fitted
incorrectly. Check seal and remedy.