Uniflair WMA 0121 Operation And Maintenance Manual
                              | |
Contents
| 
OPERATION AND MAINTENANCE MANUALWall Mounted 0121…066128 (32) Monobloc Wall Mounted Unit - WMA/WMF 0121-0181-0251-0281-0331-0551-0661 - Rev. 2.0. - Date: 18-07-2000 ENREFRIGERANT CIRCUITPROBLEM POSSIBLE CAUSE CHECK/REMEDYHIGH COMPRESSOR INTAKEPRESSUREA) Heat Load greater than expected. Check the consistency of the room thermal load;check, in the presence of strong dehumidification,the airflow and the external conditions; check theamount of outside air draw.B) Airflow pressure too high. See “HIGH COMPRESSOR OUTPUTPRESSURE”.C) Circuit refrigerant overload Remove the refrigerant from the circuit.D)Return of liquid refrigerant to thecompressor intake.Check that the overheating of the thermostat valveis correct (approx 5-8°C); check that the valvesensor bulb has not lost its refrigerant charge andis well positioned, fixed and isolated.LOW COMPRESSOR INTAKEPRESSUREA) Room temperature is too low. See “ROOM TEMPERATURE IS TOO LOW”.(and formation of frost in the coil) B) Air flow is too low or absent. SEE “LOW AIR FLOW”.C) Refrigerant filter is blocked. Check the refrigerant filter.D) Thermostat Valve is un-set or faulty. Check that the overheating of the thermostat valveis correct (approx 5-8°C); check that the valvesensor bulb has not lost its refrigerant charge andthat it is correctly positioned, fixed and isolated.E) Insufficient refrigerant load. Check for any leakage and restore the load tomeasure a sub-cooling of the condensor liquidoutlet of 3-5°C.INTERVENTION OF THEPRESSOSTAT BP(low compressor intake pressure)A) Thermostat valve is un-set or faulty. Check that the overheating of the thermostat valveis correct (approx 5-8°C).B) filter cartridge is dirty. deidratore Check that the cartridge dehydrator filter doesn’tneed to be replaced; the difference between theair temperature measured before and after thefilter must be less than 2°C.C)Output pressure is too low. see “LOW COMPRESSOR OUTPUTPRESSURE” . |
Related manuals for Uniflair WMA 0121
manualsdatabase
Your AI-powered manual search engine