User Manual

15
D
GB
F
E
09794-05.2012-DGbFEI
Troubleshooting
What to do, when ….
Display Possible fault causes or information message
> Check control fuse and voltage at terminals
L and N on the BCM 2000
Control voltage is ON
but no LED lights up
> Interruption (open contact) in the safety chain.
Check all integrated switches and units for continuity
LED „power on“ and „compressor on“
light up but the compressor does not turn
Fault message
> discharge end temperature too high
> Suction gas overheating too high
> Condensing temperature too high
> Bypass from pressure to suction side
1 = compressed gas temp. too high
LED ON / Compressor OFF
Fault message > Motor overload
> Undervoltage
> Control error
> Winding short, short circuit, accidental ground
> Two-phase mode
2 = winding temperature too high > Motor cooling insuffi cient
LED ON / Compressor OFF > Extremely unequal phase load
Status message
> Oil sump heating not working
> Pre-heating phase too short
Operation released at +25°C, but at the latest
3 = Oil temperature too low after 30 min. pre-heating time
LED ON / Compressor OFF
> Oil sensor is not screwed as far as it will go into the Fault
message screw-in sleeve
> Not enough oil
> Liquid coolant in compressor / in oil
> Dirt in machine / in oil
> Oil pump defect
4 = Oil pressure too low > Inadequate oil return
LED ON / Compressor OFF > Unsuitable oil grade
> Damage to bearings or power plant, wear
What to do, when ... ?