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4. Whether carbon brush holder is loose, and whether carbon brush is on the same plane and
the same straight line and is well contacted;
5. None of the above example issues is allowed. It is necessary to timely solve if any found.
It is recommended to maintain voltage-stabilized power source every year, and maintenance
items include:
1. Clean up dust and stains on each part of voltage stabilizer;
2. Check whether electrical components are damaged, and if any, timely replace;
3. Whether chain transmission mechanism and other parts of the voltage regulating system
operate normally. These parts shall be well lubricated and chain looseness shall be calibrated;
4. Replace damaged or seriously worn carbon brushes, and wipe clean column-type voltage
regulator coil with carbon tetroxide and cotton to make it smooth as new;
5. If there is any burning point, timely polish smooth with No. 0 fine sandpaper.
7.13 Maintenance of refrigeration dryer
Notes: refrigeration dryer has to be started before air compressor operates. It is strictly
prohibited to blow compressed air into refrigeration dryer when the refrigeration dryer stops
operating.
➢ Start up
1. Press down ON/OFF button and wait for 5 minutes if there is no abnormality until the
refrigeration dryer operates at correct working pressure and temperature.
2. Slowly open air inlet valve of refrigeration dryer to increase the air inlet pressure of
refrigeration dryer to the system pressure.
3. Slowly open the drainage valve of refrigeration dryer until the dryer starts to operate normally.
➢ Shutdown
1. Close the air inlet valve of the refrigeration dryer after the air compressor stops operating
2. Press the ON/OFF button.
3. Maintenance and service
4. Daily inspection items for maintenance:
5. Check whether the power indicator light is on.
6. Check whether dew point indicating instrument is in the green area
➢ Monthly inspection items for maintenance:
1. Check drain valve
2. Check maintenance items every 4 months:
3. Clean condenser fins
4. Check power consumption
5. Check whether there is refrigerant leakage
6. Check maintenance items every 12 months:
7. Turn off the unit, and completely maintain the drain valve
8. Turn off the unit and replace elements of the front and rear filters
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