EM E 241, Instructions For Use Manual

Page: 14 / 81

14
G
B
MAINTENANCE
4
• BEFORE CARRYING OUT ANY OPERATION, ALWAYS PULL OUT THE
PLUG AND DRAIN THE RECEIVER COMPLETELY (figures 10-11)
• Check that all screws (in particular those of the head of the unit) are tightly
drawn up (torque 10 Nm = 1.02 Kgm). The check must be carried out prior
to the first compressor starting.
• After loosening any safety screws ( fig. 12a ), clean the intake filter
according to the type of working environment and at least every 100 hours
(
figures 12b-12c ). If necessary, replace the filter element (clogging of
the filter reduces compressor performance and an inefficient filter causes
increased wear).
• For lubricated models, replace the oil after the first 100 hours of operation
and every 300 hours subsequently ( figures 13a-13b-13c ). Remember to
check the oil level at regular intervals.
Use API CC/SC SAE 40 . (For cold climates, API CC/SC SAE 20 is
recommended). Never mix different grade oils. If the oil changes color
(whitish = presence of water; dark = overheated), it is good practice to
replace the oil immediately.
• Spent oil (lubricated models) and condensate MUST BE DISPOSED
OF in accordance with environmental protection regulations and current
legislation.
The compressor must be disposed in conformity with the methods
provided for by local regulations
POSSIBLE FAULTS AND RELATED PERMITTED REMEDIES
5
FAULT CAUSE REMEDY
Leakage of air from the valve of the pressure
switch with the compressor off. Check valve that, due to wear or dirt on the seal,
does not perform its function correctly. Unscrew the hexagonal head of the check valve,
clean the valve seat and the special rubber
disk (replace if worn). Reassemble and tighten
carefully (figures
14a-14b ).
Reduction of performance. Frequent start-up.
Low pressure values. Excessive performance request, check for any
leaks from the couplings and/or pipes. Intake
filter may be clogged. Replace the seals of the fitting, clean or replace
the filter.
The compressor stops and restarts automatically
after a few minutes.
In the V, 3 HP versions, it is does not start. Tripping of the thermal cutout due to overheating
of the motor. Clean the air ducts in the conveyor. Ventilate
the work area. Reset the thermal cutout. On
lubricated and V type models, check oil level
and quality. On V models, have the voltage
checked.
After a few attempts to restart, the compressor. Tripping of the thermal cutout due to overheating
of the motor (removal of the plug with the
compressor running, low power voltage). Activate the on/off switch. Ventilate the work
area. Wait a few minutes. The compressor will
restart independently. On V, 3 HP models, reset
the thermal cutout. Remove any power cable
extensions.
The compressor does not stop and the safety
valve is tripped. Irregular functioning of the compressor or
breakage of the pressure switch. Remove the plug and contact the Service
Center.
TABLE 1 – MAINTENANCE
FUNCTION
AFTER THE
FIRST 100
HOURS
EVERY 100
HOURS
EVERY 300
HOURS
Cleaning of intake filter and/
or substitution of filtering
element
●
Change of oil*
● ●
Tightening of head tension
rods The check must be carried out prior to the first
compressor starting
Draining tank condensate 24 h -----> 24 h -----> 24 h -----> ...
* For lubricated models only