Message Possible cause Remedy
0033 A
Blower motor FC: STO-
function inactive
Fault STO channels Check STO channels
0034 A
Blower motor FC off -
STO?
Fault STO channels Check STO channels
0035 A
dp ⇟
Working pressure very
low.
Check operating conditions.
Check all feed lines, discharge lines, the in‐
let and the discharge silencers and the
blower block.
0036 A
Rotational direction
block
The drive motor is turning
in the wrong direction.
Changeover phase lines L1 and L2.
0037 A
pRV ⇞
The safety valve does not
open
Call KAESER SERVICE.
0038 A
Drag indicator p1 ⇟
Pressure peaks in the vac‐
uum network
Check operating conditions.
0039 A
Drag indicator p2 ⇞
Pressure peaks in the
compressed air network
Check operating conditions.
0040 A
Surge arrester
Over voltage in the power
supply (only in version for
Canada)
Check power supply.
Call KAESER SERVICE.
0050 A
Greasing system
Fault in re-lubrication de‐
vice
Contact KAESER SERVICE.
0057 A
Model?
Compressor model uncer‐
tain.
Call KAESER SERVICE.
0074 A
External message 2
1)
0075 A
External message 3
1)
0080 A
Vibration monitoring
VSE ⇞
Alarm from vibration moni‐
toring
Call KAESER SERVICE.
0092 A
Switch p1
1)
0093 A
Switch p2
1)
0094 A
Switch T1
1)
0095 A
Switch T2
1)
0096 A
Switch block speed
1)
0097 A
Switch T3
1)
10 Fault Recognition and Rectification
10.2 Interpreting fault messages
154
Service Manual Controller
SIGMA CONTROL 2 BLOWER ≥ 2.5.3 No.: 901700 10 E
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