KAESER BSD 50 User Manual

Message Possible cause Remedy
fan M2 I⇞ Overload shut-down of the first fan mo‐
tor.
Investigate cause of shut-down.
Reset overload protection cut-out.
Call KAESER Service.
fan M3 I⇞ Overload shut-down of the second fan
motor.
Investigate cause of shut-down.
Reset overload protection cut-out.
Call KAESER Service.
fan M4 I⇞ Overload shut-down of the third fan mo‐
tor.
Investigate cause of shut-down.
Reset overload protection cut-out.
Call KAESER Service.
fan M7 I⇞ Overload shut-down of the control cab‐
inet fan motor.
Investigate cause of shut-down.
Call KAESER Service.
motor bearings Drive motor bearings overheated. Re-grease the motor bearings.
Call KAESER Service.
motor I⇞ Overload shut-down of the compressor
drive motor.
Investigate cause of shut-down.
Change the oil separator cartridge.
Call KAESER Service.
motor T⇞ Compressor drive motor overheated. Clean the motor.
Keep ambient conditions within speci‐
fied limits.
mains cont. off? Main contactor not dropping out. Check main contactor and wiring.
mains cont. on? Main contactor not pulling in. Check main contactor and wiring.
mains voltage ⇟ Second power failure. Check power supply voltage.
Check the door interlock switch.
mains monitor Fault in main power supply. Have the main power supply checked.
emergency stop EMERGENCY STOP pushbutton
pressed.
Unlatch the pushbutton.
OS dp⇞ Oil separator cartridge clogged. Change the oil separator cartridge.
OS T⇞ Maximum air temperature at the oil sep‐
arator tank outlet is exceeded.
Check the line to the trip relay.
oil p⇟ The machine cannot switch to LOAD
until the minimum oil pressure is
reached.
Check the oil circulation.
Check the pressure switch, line and
connection.
p-switch Customer specific:
no details possible.
–
pRV ⇞ The activating pressure of the pressure
relief valve on the oil separator tank has
been exceeded.
Change the pressure relief valve.
oil content ⇞ The oil content limit for pure air has
been exceeded.
Change the oil separator cartridge.
9 Fault Recognition and Rectification
9.2 Alarm messages (machine stop)
9_5708 08 USE
Service Manual Screw Compressor
BSD
55

KAESER BSD 50 Specifications

General

Model	BSD 50
Category	Rotary Screw Compressor
Motor Power	30 kW
Noise Level	69 dB(A)
Drive Type	Direct