Air PreciseAIR PCA Series, Инструкция по установке, эксплуатации и обслуживанию

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IOM-PreciseAIR
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3 Symptom 3 High Refrigerant Discharge Pressure
3.1 Dirty tube and fin surface (air cooled
condenser) Clean with compressed air or water spray, Use fin comb
if fins bent.
3.2 Condenser problems Check if the condenser is clogged.
Remove and clean if necessary.
3.3 Condenser water flow/pressure/temperature Have mechanical personnel verify water flow to the
condenser.
Excessive piping pressure drop will cause low flow.
Check all pipe valves. Make sure they are open.
Verify if water temperature is well above design
(typically 90F).
3.4 Water regulating valve Verify if the water regulating valve is operational.
Check connections with refrigerant high pressure side.
3.5 System overcharged with refrigerant Remove excess refrigerant.
3.6 Non-condensable in system (air in system) Have a refrigeration service technician evacuate the
system and recharge it.
3.7 Blower belts Blower belts may be loose, requiring adjustment.
(if applicable).
3.8 High pressure control Verify the High Pressure Control. It requires a manual
reset.
4 Symptom 4 Low Suction Pressure
4.1 Lack of refrigerant Check for adequate refrigerant charge (bubbles or
misty sight glass indicates low charge). If charge is low,
have the system checked for leaks and recharged by a
refrigeration service technician.
4.2 Evaporator dirty Clean chemically.
4.3 Clogged liquid line filter-drier Replace cartridge(s).
4.4 Improperly Set Low Pressure parameters Have refrigeration service technician reset control or
Pressure Control replace if defective.
4.5 Expansion valve malfunctioning Check and reset for proper superheat. Replace if
necessary. Check the thermal bulb and capillary tube
for damage.
4.6 Condensing temperature too low Check the condensing temperature regulation system.
4.7 Insufficient chilled water or air flow Adjust flow rate across evaporator.
4.8 Process air temp. Check entering air/water temperature. Verify the
system conditions and find out if the air/water is too
cold based on design conditions.
4.9 Flooding control valves Have a refrigeration service technician check flooding
control valves for proper operation. Adjust valves or
replace if defective.
5 Symptom 5 Low Oil Pressure/Level
5.1 Low-oil level/pressure sensor defective Replace sensor.
5.2 Flooding of refrigerant into crankcase Adjust thermal expansion valve.
5.3 Crankcase heater failed Have the electrician check fuses for power to the
crankcase heater.
5.4 Short cycling Pumps oil out of the compressor and the unit does not
run long enough for the oil to return. Check for short
cycling.