Message Possible cause Remedy
separator dp ↑ The pressure drop across the oil
separator cartridge has risen.
Oil separator cartridge clogged.
Change the oil separator cartridge.
separator h ↥ The interval for the next oil sepa‐
rator cartridge check has expired.
Change the oil separator cartridge.
oil filter dp ↑ The pressure drop across the oil
filter has risen.
Oil filter clogged.
Change the oil filter
oil filter h ↥ The interval for the next oil filter
check has expired.
Change the oil filter.
oil level ↓ Cooling oil level too low. Top up the cooling oil.
oil T ↓ Cooling oil temperature too low. Check temperature switch, line and connec‐
tion.
Check the oil circulation.
Increase room temperature.
oil change h ↥ The interval for the oil change has
expired.
Change the cooling oil
p-switch Customer specific:
no details possible.
–
buffer battery Data retention battery is almost
discharged.
Change the battery.
error: RAM Internal RAM defective. Call authorized KAESER Service represen‐
tative.
oil content ↑ The oil content limit for pure air will
soon be reached.
Check the scavenge tube in the oil separator
cartridge.
Check the dirt trap strainer in the scavenge
line.
Check air treatment upstream of the meas‐
uring point.
V-belt tension Belt tension is too low. Re-tension drive belts.
blt.coup.insp. h ↥ The maintenance interval for V-
belt tension / coupling inspection
has expired.
Carry out a visual check.
Re-tension drive belts.
blt.coup.chng. h ↥ The maintenance interval for
changing the belts/coupling has
expired.
Drive belts:
Replace the drive belts.
Coupling:
Call authorized KAESER Service represen‐
tative.
start T ↓ ↓ The airend temperature is too low
(<15 °F) for the machine to be op‐
erated.
Keep ambient conditions within specified
limits.
start T ↓ The airend temperature is too low
(<36 °F).
Keep ambient conditions within specified
limits.
T-switch Customer specific:
no details possible.
–
9 Fault Recognition and Rectification
9.3 Warning messages (yellow LED lights)
9_5721 06 USE
Service Manual Screw Compressor
ASD T Tri-Voltage
57
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