Chapter Vi Common Faults And Troubleshooting - SATA AE5881 Manual Del Uso

Chapter VI Common faults and troubleshooting
Note: Depending on the design of model or due to different parts equipped, the part names listed in this section are not available on all
models. If you have any doubts, please contact SATA. Thank you.
1 Too large air pressure drop
Symptom
Selected pipe system is too small
The selected air compressor is too small
Frozen evaporator
2 Poor water removal
Symptom
There is water at terminal station outlet
Abnormal indication of evaporation
pressure (evaporation temperature)
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AE5881/AE5882/AE5883
Cause
The pipe valve is not in the fully open position
The selected pipe diameter is too small
The pipeline is too long; there are too many
elbows and joints
Excessive air leakage at the pipe connection
The filter in the pipeline is blocked
The air volume (total) used by the terminal
station exceeds the rated value of the air
compressor, and the flow rate is naturally
reduced
Fault in temperature switch or pressure switch
Fault or blockage in expansion valve
Fault or blockage in hot air bypass valve
(solenoid valve)
Cause
The bypass valve between the dryer inlet and
outlet is not fully closed
The air does not pass through the dryer
Large air flow, too large pressure drop
The valve in front of the drainer is not fully
open or blocked
Faulty drainer
The drain hose is above the drainer
The air compressor is too big and the dryer is
too small, which cause poor match.
Too high evaporation temperature
Too high inlet temperature
Polluted ambient air and poor ventilation
Fault or blockage in expansion valve
Refrigerant leakage
Fault in hot air bypass valve
Instrument damage
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Troubleshooting
Adjust the valve to the fully open position
Increase the pipe diameter
Failure of pipe system; the system needs to be
redesigned
Reconnect after pressure relief to ensure good
air tightness
Replace the filter element
Reconfigure the air compressor, replace
the air compressor with the one with an
appropriate displacement, or consider adding
an air compressor. Take specific measures in
combination with actual working conditions
Replace the temperature switch or pressure
switch
Replace the expansion valve
Re-adjust or replace the hot air bypass valve
Troubleshooting
Fully close the bypass valve
Fully open the dryer inlet and outlet valves and
close the bypass valve
Failure of air supply system; the system needs
to be redesigned
Check that the valve is fully open or clear the
blockage
Repair or replace it
Re-route the drain hose which shall be below
the drainer
Redesign the match
Check the air supply load of air compressor
Install a cooler or an air reservoir
Select a suitable place or improve the
ventilation
Renew the expansion valve
Locate and rectify the leak point of the
refrigerant pipeline and add refrigerant
Check the hot air bypass valve and replace if
damaged
Check the instrument and replace if there is a
fault
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