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m
aintenance
Before attempting any maintenance operation, make sure that:
No parts of the system is under pressure.
No parts of the system is electrically powered.
WEEKLY OR EVERY 40 HOURS OF OPERATION
Verify the temperature on the control panel display.
visually check if the condensate is drained regularly.
MONTHLY OR EVERY 200 HOURS OF OPERATION
Clean the condenser with a compressed air jet, taking care not to damage the cooling battery aluminium wings.
At the end of the above mentioned operations, check if the dryer is working properly.
YEARLY OR EVERY 2000 HOURS OF OPERATION
Check if the flexible tube used for condensate drainage is damaged and replace it if necessary.
Check if all connecting pipes are properly tightened and fixed.
At the end of the above mentioned operations, check if the dryer is working properly.
t
roublesHooting
NOTE: FOLLOWING BEHAVIORS ARE NORMAL CHARACTERISTIC OF OPERATION AND NOT TROUBLES:
• Variable speed of the fan.
• Visualization of message ESA in case of operation without load.
• Visualization of negatives values in case of operation without load.
Troubleshooting and eventual control and/or maintenance operations must be performed by qualified personnel.
For maintaining the refrigerating circuit of the machine, contact a refrigeration engineer.
PROBLEM
Luminous switch / Display of the
control panel OFF.
The compressor doesn't start.
The fan doesn't work.
Condensate drain absent (no wa-
ter nor air).
Air flows continuously through
the condensate drainage.
Water in the pipes downstream
the dryer.
The temperature on the control
panel display is higher than the
nominal value.
The dryer does not let compres-
sed air flow through.
CAUSE/REMEDY
1. Check if the line is electrically powered.
2. Check cabling.
3. Check the electronic control board; if the trouble persists, replace it.
1. Check cabling and control.
2. Activation of compressor's internal thermal protection; wait one hour and check again. If the fault persists:
stop dryer and call a refrigeration engineer.
3. Check the compressor's electrical components.
4. Short circuit in the compressor. Replace it.
1. Check the protection fuse (if present), and in case replace it.
2. Check cabling.
3. Check the electronic control board; if the trouble persists, replace it.
4. Short circuit in the fan. Replace it.
1. Check cabling.
2. Pre-filter of the drainage system dirty, clean it.
3. The coil of the drainage solenoid vale is burned out, replace it.
4. Drainage solenoid valve clogged/jammed, clean or replace it. (fig.2)
5. Check the electronic card, if the trouble persists, replace it.
6. The temperature on the display of the control panel is lower then the nominal value, call a refrigeration engi-
neer.
1. Drainage solenoid valve jammed, clean or replace it.
2. Verify the condensate drainage times.
3. Check the control. If the trouble persists, replace it.
1. The dryer is off; turn it on.
2. Close by-pass (if present).
3. Condensate drainage absent; see specific section.
4. The temperature on the control panel display is higher than the nominal value; see specific section.
1. Check if the compressed air inlet/outlet is connected properly.
2. The compressor doesn't start; see specific section.
3. The fan doesn't turn; see specific section.
4. The flow rate and/or temperature of the air entering the dryer are higher than the nominal values; restore the
nominal conditions.
5. The ambient temperature is higher than the nominal values; restore the nominal conditions.
6. The condenser is dirty; clean it.
7. Condensate drain absent (no water nor air); see specific section.
8. Check if the temperature control probe in the evaporator is positioned improperly or faulty.
9. Gas leakage in the refrigerating circuit: stop dryer and call a refrigeration engineer.
10. Check cabling.
1. Check if the compressed air inlet/outlet is connected properly.
2. The temperature on the control panel display is lower than the nominal value; call a refrigeration engineer.
3. Check if the temperature control probe in the evaporator is positioned improperly or faulty.
4. Check if the connecting tubing are clogged; eventually proceed accordingly.
5. Check if by-pass (if present) is installed properly.
6. Check electronic control board. If the trouble persists, replace it.
6. d
ryer
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