User manual

Industrial Air Division
252920 1163 04
1. Push button (I) is pressed, compressor starts running, but
does not load after a delay time
a. Solenoid valve (Y1) out of order
a. Replace valve
b. Inlet valve (IV) stuck in closed position
b. Consult Atlas Copco
c. Leak in control air flexibles
c. Replace leaking flexible
d. Minimum pressure valve (Vp) leaking (when net is
depressurized)
d. Consult Atlas Copco
2. Compressor does not unload, safety valve blows
a. Solenoid valve (Y1) out of order
a. See 1a
b. Inlet valve (IV) does not close
b. See 1b
3. Condensate is not discharged from moisture trap during
loading
a. Discharge flexible clogged
a. Check and correct as necessary
b. Float valve malfunctioning
b. Consult Atlas Copco
4. Compressor air output or pressure below normal
a. Air consumption exceeds air output of compressor
a. Check equipment connected
b. Choked air inlet filter element (AF)
b. Replace filter element
c. Solenoid valve (Y1) malfunctioning
c. See 1a
d. Leak in control air flexibles
d. See 1c
e. Inlet valve (IV) does not fully open
e. See 1b
f. Oil separator element (OS) clogged
f. Have element replaced. Consult Atlas Copco
g. Air leakage
g. Check and correct as necessary
h. Safety valve (SV) leaking
h. Have valve replaced. Consult Atlas Copco
i. Compressor element (E) out of order
i. Consult Atlas Copco
5. Excessive oil flow through air inlet filter after stopping
a. Check valve (CV) leaking or oil stop valve (Vs) jammed
a. Consult Atlas Copco
6. Safety valve (SV) blows after loading
a. Inlet valve (IV) malfunctioning
a. See 1b
b. Minimum pressure valve (Vp) malfunctioning
b. See 1d
c. Oil separator element (OS) clogged
c. See 4f
d. Safety valve (SV) out of order
d. See 4h
e. For Full-feature: dryer pipes clogged by formation of ice
e. Have refrigerant system checked. Consult Atlas Copco
7. Element outlet 1) or air outlet temperature above normal
a. Insufficient cooling air or cooling air temperature too high
a. Check for cooling air restriction or improve ventilation of
compressor room. Avoid recirculation of cooling air. If
installed, check capacity of compressor room fan. On water-
cooled compressors, check cooling water conditions
b. Oil level too low
b. Check and correct as necessary
c. Oil cooler (Co) clogged
c. Clean cooler
d. By-pass valve (BV) malfunctioning
d. Have valve replaced
e. Air cooler (Ca) clogged
e. Clean cooler
f. Compressor element (E) out of order
f. See 4i
1) A warning message will appear on display (4-Fig. 7a).