Tabla de contenido
Idiomas disponibles
Idiomas disponibles
The low pressure switch opens then closes again: Verify the points mentioned in the "low
pressure switch tripped" section above.
Intermittent contact on machine control unit: Repair or replace the faulty electrical part.
Check the Temperature control unit
Make sure the equipment is not too large for the facilities.
The equipment does not shut down:
Verify that the humidistat functions properly, repairing or replacing it if necessary.
Compressor contactor contacts are stuck together: Check that the coil is functioning
properly and that the contacts are not burned.
The pressure of the intake duct is too low: Check the refrigerant charge of the equipment
for leaks, to solve this problem please refer to the refrigerant charge section. Check that there are
no obstructions in the cooling circuit,, dehydrating filter, expansion valve etc. and replace if
necessary.
Verify that the equipment is powerful enough for the existing thermal conditions.
Excessive noise:
The fastening screws of the compressor or fan are loose: Tighten all the fastening elements.
Check the compressor oil level.
The compressor produces internal bumping noises: Check that the noise does not come
from any fluid leak from overheating (see section of refrigerant charge).
18. REFRIGERANT CHARGE
For the procedures described below, we recommend you contact a professional specialised in
Draining the Cooling Circuit:
It is imperative to drain the cooling circuit before charging the refrigerant.
-First draining procedure:
1.- Connect the gauge tubes to the intake pressure lines of the circuit (low pressure) and to
the return pressure lines (high pressure).
2.- Connect the main line of the gauge to the vacuum pump.
3.- Open all the valves, including the solenoid and the regulating valves.
4.- Open the valves of the gauge (LO = low pressure valve / HI = high pressure valve).
5.- Activate the vacuum pump and wait until the circuit is completely drained.
6.- Close all valves or stopcocks and disconnect the vacuum pump.
Refrigerant Charge:
The equipment uses R-407-C class refrigerant, which is a blend of 3 different gases with
different properties.
This is the reason why the gas taken from the refrigerant bottle must be introduced in the
low-pressure circuit by means of a charger (expansion system).
After having discharged the cooling circuit, and after having installed the charger and
connected the flexible tubes of the gauge to the high and low-pressure circuits, we can proceed
with the charge:
heating and air conditioning units.
ENGLISH
54
Tabla de contenido
