KAESER BSD 50 User Manual

Message Possible cause Remedy
RD T↑ Refrigeration dryer:
Compressed air temperature too
high.
Maintain operating conditions.
Clean the refrigerant condenser.
Clean the cooler.
Install an extractor fan.
RD T↓ Refrigeration dryer:
Compressed air temperature too
low.
Call KAESER Service.
bearing lube h⇞ The maintenance interval for re-
greasing the bearings has expired.
Re-grease the motor bearings.
motor bearing h⇞ The maintenance interval for check‐
ing the compressor drive motor
bearings has expired.
Have the motor bearings checked by an au‐
thorized KAESER Service Technician.
ext.load signal? Uncertain external load signal:
The high cut-out pressure was ex‐
ceeded.
The external load control has not
switched to idle.
Check settings of the external controller.
Take into account pressure drops across
filters and dryer.
fan bearing h⇞ The maintenance interval for check‐
ing the fan motor bearings has ex‐
pired.
Have the motor bearings checked by an au‐
thorized KAESER Service Technician.
air filter dp↑ Air filter clogged. Carry out air filter maintenance
air filter dp⇡ Air filter clogged. Carry out air filter maintenance
air filter h⇞ Maintenance interval for air filter
check has elapsed.
Check the air filter.
modem problem SIGMA CONTROL does not recog‐
nise the modem.
Check the link between
SIGMA CONTROL and the modem.
motor bearings Drive motor bearing defective. Call KAESER Service.
motor T↑ Drive motor overheating. Clean the motor.
Keep ambient conditions within specified
limits.
motor starts /d⇞ The permissible number of motor
starts was exceeded in the last
24 hours.
Extend the idle period.
Increase the capacity of air receiver.
Increase cross-section of piping between
compressor and air receiver.
motor starts /h⇞ The permissible number of motor
starts was exceeded in the last
60 minutes.
Extend the idle period.
Increase the capacity of air receiver.
Increase cross-section of piping between
compressor and air receiver.
system press. ↑ Network pressure is above the
"sys.press. high" value.
Check for air leaks.
Check the 'sys.press. high' warning setting.
Check if the machine switches to LOAD.
system press. ↓ Network pressure has fallen below
the set 'low' value.
Air consumption too high.
Check air demand.
Check cable runs and sensor connections.
Check the 'sys.press. low' warning setting.
9 Fault Recognition and Rectification
9.3 Warning messages (yellow LED lights)
58
Service Manual Screw Compressor
BSD 9_5708 08 USE

KAESER BSD 50 Specifications

General

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