8 Troubleshooting
8.1 Fault finding and fault correction
8.1.1
Fault finding in drive motor
Description Cause Rectification
Motor does not start. Fault in the electrical power
supply.
Check lines and fuses. Com-
pare the motor data with the
mains supply.
8.1.2 Fault finding in compressor block
Description Cause Rectification
No oil pressure. Air in the oil pump.
Direction of rotation is incor-
rect.
Vent the oil pump and lines.
Check and rectify direction of
rotation.
The compressor does not ach-
ieve final pressure.
Line or condensate drain
valves leaking.
Final pressure safety valve
blows off too early.
Piston rings stuck or worn.
Piston clearance too large.
Tighten and seal lines. Clean
condensate drain valves and
replace if worn.
Clean and reset final pressure
safety valve.
Free the piston rings or re-
place them if needed.
Check clearance and replace
parts if necessary.
Delivery rate drops. Piping leaking. Tighten and seal lines.
Intermediate pressure safety
valve blows off.
Intermediate pressure too
high, suction valves or pres-
sure valves leaking.
Check suction and pressure
valves and replace if needed.
Compressor getting too hot. Cooling air feed is inadequate.
Suction valves or pressure
valves leaking.
Direction of rotation is incor-
rect.
Check installation. Observe a
max. ambient temperature of
+45 °C.
Check suction and pressure
valves and replace if needed.
Check and rectify direction of
rotation.
Taste of oil in the air. The filters are not serviced,
and the filter cartridges are
saturated.
Incorrect oil type used.
Maintain the filters and re-
place the filter cartridge.
Use approved oil. Carbonised
valves should be cleaned.
OPERATING MANUAL Troubleshooting | 8
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