Troubleshooting guide
WP33L_BA_K1_12_en_08.fm
47
7 Troubleshooting guide
Note!
• Should a malfunction occur, first check the ’User Interface’
display status on the compressor Control Panel (fault = RED).
• The following information tabulated below, provides help to
correct any fault.
If the fault cannot be corrected, please contact J.P. SAUER &
SOHN customer service. The fault description journal is in the
appendix of this manual..
Fault Probable cause Remedy
Operation with compressor
control:
The compressor does not
start or shuts down.
No supply voltage / no control
voltage.
Check fuses. Replace blown fuses.
Operation with compressor
control:
Compressor shut-down,
fault indicator lamp “Oil
level“ (option) illuminates.
The oil level is too low. Check the oil level, refill with oil if nec-
essary. Check for oil leaks.
Oil too viscous. Fill oil in accordance to recommenda-
tions.
Check ambient temperature is > + 5°C.
Operation with compressor
control:
Compressor shut-down due
to over-current relay, fault
indicator lamp “Overcurrent“
illuminates.
Motor overheated. Excessive
current drawn.
Check supply voltage and check for
loose connections. The compressor
can be started again after a cooling-
down period.
Check if crankshaft can be easily rota-
ted by hand. If not, disconnect coupling
to determine if motor or compressor is
at fault.
Piston seizure Check cylinders and pistons for any
score marks, replace as necessary.
Safety valve of 1
st
stage
blows:
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