Carrier Acqua Junior 30AJ Manual De Instalación, Operación Y Mantenimiento página 71

Problem
5. Unit runs continuously, but with
low performance.
6. High discharge pressure
7. Reduced discharge pressure.
Probable Cause
Excessive thermal load.
Refrigerant lack.
Dirt in the condensers.
Defective compressor.
Insuffi cient refrigerant supply in the evaporator.
Faulty thermal insulation.
Air in the system cold water.
Oil in evaporator.
Compressor runs in reverse rotation.
Low air fl ow in condenser.
Dirty condenser.
High condensation entering air temperatures.
Excess of refrigerant.
Excessive air fl ow in the condenser.
Refrigerant lack.
Defective compressor.
Compressor runs in reverse rotation.
Procedure
• Check project conditions.
• Check and fi x leaks. Add
refrigerant if required.
• Check and clean.
• Check compressor pressures and
currents. Replace if required.
• Check if there are obstructions
in the dryer fi lter, or in the
lines. Replace or correct.
• Check expansion valve
obstruction.Replace if necessary.
• Check the position of the
expansion valve bulb or equalizer
tube. Correct according to
manufacturer specifi cations.
• Fix or replace.
• To take air of the system.
• Check and drain.
• Check suction and discharge
pressures. In case reversion is
detected, invert the terminal power
cables. Check fan rotation.
• Check fan rotation.Fix if necessary.
• Check motor operation.
Replace if necessary.
• Check dirt in the coil. Clean
and provide proper fi ltering.
• Check and clean.
• Check condensation air
short circuit or insuffi cient
air intake. To Correct.
• Check components of the chilled
water installation. To Correct.
• Check and remove excess, setting
subcooling between 8 and 11 °C.
• Check and adjust.
• Check and fi x leaks. Add
refrigerant if required.
• Check suction and discharge
pressures. Replace if necessary.
• Check suction and discharge
pressures. In case reversion
is detected, invert the
terminal power cables.
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