Atlas Copco GA315

2920 1251 02
33
Instruction book
6 PROBLEM SOLVING
Warning
Before carrying out any maintenance or repair, press stop
button (9-Fig. 3a), wait until the compressor has stopped
(approx. 30 seconds) and then press emergency stop button
(S2). Switch off the voltage and depressurize the compressor.
Take precautions to avoid an accidental restart. Apply all
relevant safety precautions, including those mentioned in this
book.
Faults and suggested remedies
1. A service message appears on the display
Replace the indicated component or grease the drive motor
as the case may be. Consult the "User manual for
Elektronikon regulator" to remedy the trouble and to reset
the message (section "Submenu SERVICE")
2. A shut-down warning message appears on the display
LED (3-Fig. 3a) will light up indicating that the
temperature at the outlet of the compressor element is too
high. See below. The message disappears as soon as the
cause of the trouble is remedied
3. Unit is shut-down
LED (3-Fig. 3a) will blink indicating either that the outlet
temperature is too high (see below) or that the motor
overload relay has tripped. Consult the "User manual for
Elektronikon regulator" to remedy the trouble and to reset
the message (section "Submenu STATUS DATA")
4. Condensate is not discharged from moisture trap
during loading
a.Discharge pipe clogged
a.Check and correct as necessary
b.Float valve malfunctioning
b.Remove float valve assembly, clean and check
5. Compressor air delivery or pressure below normal
a.Air consumption exceeds air delivery of compressor
a.Check equipment connected
b.Choked air filters (AF)
b.Replace filters
c.Leaks in control air flexibles
c.Replace flexibles
d.Air leakages
d.Check and correct
6. Element outlet or delivery air temperature above
normal
a.On GA, insufficient cooling air or cooling air
temperature too high
a.Check for cooling air restriction. Improve ventilation
of compressor room. Avoid recirculation of cooling air
b.On GA W, cooling water temperature too high or flow
too low
b.See section 7.5.2. Increase water flow
c.Oil level too low
c.Check and correct as necessary
d.Oil cooler (Co) clogged
d.Consult Atlas Copco
e.Air cooler (Ca) clogged
e.Consult Atlas Copco.
f. On GA W, restriction in cooling water system due to
dirt or formation of scale
f. Consult Atlas Copco
7 PRINCIPAL DATA
7.1 Readings on display
Normally the main display (Fig. 3b) is shown, indicating the
actual air outlet pressure and the actual compressor status. The
key <<Show More>> allows the operator to call up other
information about the condition of the compressor (see section
3.5.1).
The readings below are valid when operating at reference
conditions (section 7.5.1):
Maximum unloading pressure See section 7.5.3 up to 7.5.15
Compressor outlet pressure . . Depends on programmed
unloading and loading
pressures
Pressure drop over air filter . . Below 0.050 bar
Pressure difference over oil
separator . . . . . . . . . . . . . . . . . Below 0.8 bar
Oil injection pressure at
compressor element 1. . . . . . . Depends on programmed
unloading and loading
pressures
Compressor outlet
temperature . . . . . . . . . . . . . . . See section 7.5.3 up to 7.5.15
Compressor element 1
outlet temperature. . . . . . . . . . Between 70°C and 100°C
Cooling air inlet
temperature (on GA) . . . . . . . Below 40 °C
Cooling water
temperature (on GA W) . . . . . Below 50 °C
7.2 Programmable settings
A number of regulation settings (e.g. loading and unloading
pressures), protection settings (e.g. shut-down level for the
compressor element temperature) and service settings (e.g.
oil service life) are programmable. The "User manual for
Elektronikon regulator" deals elaborately with this matter
(section "Submenu MODIFY SETTINGS").