EN
i-ACCURATE i-AX - i-AW - i-AD - i-AT - i-AF
67
Check the calibration and the operation of the
condenser fan pressure switch or the speed
controller;
The condensing pressure control system
isn't working (see the control panel manual).
Check the temperature of the cooling water.
Check the calibration and the operation of the
pressure control valve (if fitted).
Install a pressure control valve to manage the
flow-rate of water according to the condens-
ing pressure.
Excessive water flow-rate to the condenser
or water too cold.
See “LOW COMPRESSOR SUCTION
PRESSURE”.
Suction pressure too low
LOW COMPRESSOR
DISCHARGE
PRESSURE
FAULT
CAUSE
SOLUTION
Check the ambient thermal load; check, above
all for intense dehumidification, the flow-rate
and the conditions of the outside air; check
the inflow of outside air.
Thermal load higher than expected
See “HIGH COMPRESSOR DISCHARGE
PRESSURE”.
The system is affected by an excessive
discharge pressure
Remove refrigerant from the circuit
Too much refrigerant in the circuit.
Check that the thermostatic valve superheat-
ing value is correct; check that the valve sen-
sor bulb is not discharged and that it is cor-
rectly positioned, secured and insulated”.a
Return of liquid refrigerant to the
compressor intake
HIGH COMPRESSOR
SUCTION PRESSURE
See “ROOM TEMPERATURE TOO LOW”.
Room temperature too low
See “LOW OR NO AIR FLOW”.
The air flow-rate is too low or null
Check the opening of the valve.
Liquid receiver outlet valve not
completely open
Check that the thermostatic valve superheat-
ing value is correct; check that the valve sen-
sor bulb is not discharged and that it is cor-
rectly positioned, secured and insulated”.
Refrigerant filter blocked
Check the liquid subcooling at the condenser
outlet; if necessary, restore the charge.
Insufficient refrigerant charge
LOW COMPRESSOR
SUCTION PRESSURE
(and possible defrosting
of the coil)
Check that the thermostatic valve superheating
value is correct (around 5°C).
Thermostatic valve not correctly calibrated
or faulty
Check and if necessary replace the dewatering
filter cartridge; the temperature difference
measured upstream and downstream of the
filter must be less than 2°C.
Dewatering filter cartridge dirty
See “LOW COMPRESSOR DISCHARGE
PRESSURE”.
The system is affected by an excessively
low discharge pressure
LOW PRESSURE
SWITCH ACTIVATED
(low compressor suction
pressure)
Summary of Contents for i-accurate
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