Maintenance; Troubleshooting - omi ED 18 Instruction And Maintenance Manual

4. MAINTENANCE, TROUBLESHOOTING AND DISMANTLING

4.1 MAINTENANCE

Before attempting any maintenance operation, make sure that:
1. No parts of the system is under pressure.
2. 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.
EVERY 24 MONTHS OR EVERY 4000 HOURS OF OPERATION (Mod. 660 ÷ 1000)
Replace the fan pressure switch.

4.2 TROUBLESHOOTING

NOTE: FOLLOWING BEHAVIORS ARE NORMAL CHARACTERISTIC OF OPERATION AND NOT TROUBLES (ONLY
FOR Mod. 18 ÷ 480 Nm3/h):
• 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.
TROUBLE
Luminous switch /
Display of the control
panel OFF.
The compressor doesn't
start.
The fan doesn't work.
Condensate drain
absent (no water nor
air).
Air flows continuously
through the condensate
drainage.
Cod. 710.0138.01.00 Rev1C – 09.2009
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.
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.
5. Mod. 660 ÷ 1000: Defective or burned out fan pressure switch: stop dryer and contact a
refrigeration engineer.
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. (pic.4)
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 engineer.
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.
POSSIBLE CAUSE AND REMEDY
ENGLISH
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