Fault
Possible cause
Remedy
Black film on the oil sight
glasses.
Oil not changed at the correct
interval.
Change the lubricating oil.
Clean or replace the sight
glass.
Insufficient oil.
Change the lubricating oil.
Clean or replace the sight
glass.
Oil overheated.
Call an authorized KAESER
service representative.
Block overloaded.
Call an authorized KAESER
service representative.
Water in the oil.
Condensate build-up by pro‐
longed storage and high humid‐
ity.
Change the lubricating oil.
Safety relief valve activates.
Inappropriate operating state,
operating pressure too high.
Bring the machine to a permis‐
sible operational state or shut
down.
PTC relay trips out.
Operating pressure too high.
Check and correct pressure dif‐
ferential.
Tab. 37 Faults and remedies
9.3 Options
This section provides remedies for technical faults concerning the machine's optional equipment.
9.3.1 Option H12
Sound enclosure faults
Alarm
Possible cause
Remedy
Overheating inside the sound
enclosure!
Fan defective or turning in the
wrong direction.
Check connection.
Contact an authorized KAESER
service representative.
Flow of cooling air blocked.
Check and clean cooling air
apertures.
Check the cooling air inlet tem‐
perature.
Drive motor overloaded.
Check operating conditions.
Leakage due to incorrect instal‐
lation of pressure-bearing com‐
ponents.
Contact an authorized KAESER
service representative.
Tab. 38 Faults and remedies (option H12)
9
Fault Recognition and Rectification
9.3
Options
Number: 9_9572 28 USE
Installation and Operating Manual Rotary lobe blower
HBPI pr
63