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Installation Manual •
COMPACTAIR ADV IOM-MIL157E-0418
4.- MAINTENANCE
4.4.- FAILURE DIAGNOSIS.
In case of failure or malfunction of the unit, the display on the control panel will show an error or alarm warning which
is explained in the control panel manual.
Nevertheless, whenever there is a unit fault, the unit should be shut down and our service technicians consulted.
Fault
Possible causes
Possible solutions
Unit does no start.
Fault in the power supply or insuf
fi
cient voltage.
Connect the power supply or check the voltage.
Circuit breakers have opened.
Reset.
Power cable or control panel cable is defective.
Inspect and correct.
Unit stops due to high
pressure during the
cooling cycle.
High pressure switch is defective.
Check cut-off pressure switch or replace pressure
switch if necessary.
Outdoor fan is not working.
Check for voltage, inspect the motor and turbine or replace
if necessary.
Outdoor fan turns in the wrong direction.
Reverse the power phases.
Outdoor coil is dirty or clogged for passing air.
Inspect and clean.
Excess refrigerant charge.
Remove the charge and charge according to the data on
the rating plate.
Unit stops due to high
pressure during the
heating cycle.
The same causes and solutions as the cold cycle but with reference to the coils and indoor fan.
Unit stops due to low
pressure.
Low pressure switch defective.
Check the cut-off pressure with a pressure gauge and replace the
pressure switch if necessary.
Indoor fan is not working.
Check for voltage and inspect the motor, turbine and
replace if necessary.
Indoor fan turns in the wrong direction.
Reverse the power phases.
Lack of refrigerant. Leak.
Correct leak, create vacuum and charge.
Dirty air
fi
lter.
Inspect and clean.
Clogged cooling circuit. Dirty
fi
lter drier.
Inspect and correct or change the
fi
lter drier.
Unit starts and stops
in short cycles.
Compressor overcharged.
Inspect suction and discharge pressure values and correct.
Compressor cuts off due to Klixon.
Check input voltage and voltage drop.
Lack of refrigerant.
Correct leak and replace.
Load and abnormal
noise in the
compressor (scroll)
Power supply phases inverted.
(three-phase compressor).
Check and reverse power phases.
At the end of the useful life of the units, please take into account the correct segregation of the waste generated. No Ha-
zardous like: Painted metallic parts, plastic elements, copper pipes, batteries, exchangers, liquid receivers, water pumps,
fans.. And Hazardous Materials such as batteries, electrical and electronic elements, compressors, dehydrating
fi
lters,
valves or refrigerant gas, etc. to be managed with an authorized dealer.
5.- END OF THE MACHINE LIFE
