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10.3 Maintenance and inspection
schedule
DANGER
High voltage – Hazard of shock, burn, or
death
· Be careful with electricity: only work on
screw compressors which are not
powered.
· Only for L55RS-L75RS: There is a risk of
electric shock from charged capacitors!
Disconnect the system from the mains
and wait 10 minutes before touching
electrical components. The power
capacitors need this time to discharge.
WARNING
Some parts of the system will still be
pressurized after the system has been
switched off. Small parts propelled at high
speed by compressed air can penetrate the
skin or destroy an eye.
Only perform checks and maintenance after
observing the following:
· Press the STOP button on the control
panel and wait until the screw
compressor comes to a stop and the
screw compressor unit is depressurized.
· The pressure gauge shows no more than
< 4.4 PSI.
· Shortly after shutting off the screw
compressor unit a small residual
pressure may remain.
· Therefore, before any maintenance work,
the screw compressor unit must be
relieved by slowly opening the screw
plug (oil filling opening) with integrated
air vent slots.
· Set the on-site main switch to "0" (OFF)
and secure it against being switched on.
CAUTION
Burn hazard – Hot surfaces
· Be careful of the hot surfaces of machine
parts when carrying out checks, making
settings and doing maintenance.
August 20, 2018
Intervals are valid for normal industrial environments
and operating conditions. If there is some uncertainty,
set the oil change interval by performing oil analysis.
In the case of a very dirty atmosphere, the cleaning
intervals have to be shortened as required.
For order numbers see the spare parts list.
10.3.1 Service Check List
Every 8 hours operation
Check air/oil reservoir oil level, add oil if
required. See Section 7.5 for information. If oil
consumption is high, refer to Section 10.4,
Excessive Oil Consumption. DO NOT MIX
LUBRICANTS.
Check operation of the machine, is it loading
and unloading properly.
ischarge pressure and temperature.
eck control panel for advisory text
messages.
Every 125 hours operation
1. Check for dirt accumulation on oil/aftercooler core
faces and the cooling fan. If cleaning is required,
clean the exterior fin surfaces of the cores by
blowing compressed air carrying a nonflammable
safety solvent, that will not damage aluminum in a
direction opposite that of the cooling air flow. The
cleaning operation will keep the exterior cooling
surfaces clean and ensure effective heat
dissipation.
2. Every 2000 hours operation or 6 months
3. Replace the oil filter element, as indicated by the
GD Pilot, every 1000 hours or every 3 months,
whichever occurs first. See "Change oil filter
cartridge", Section 10.5.
4. Replace air filter element, operating conditions
determine the frequency of service. The air filter will
need to be changed, as indicated by the GD Pilot,
every 2000 hours or every 6 months, whichever
occurs first. See "Change Air Filter", Section 10.7.
5. An oil sample will need to be taken and sent to the
GD oil lab.
6. Replace cool air inlet filter pad. See Section Error!
Reference source not found..
7. Clean or replace the control box filter (if app.), as
indicated by the GD Pilot, every 1000 hours or every
3 months, whichever occurs first. See "Clean/
replace cool air intake and control box filter pads",
Section Error! Reference source not found..
41
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