Type of error
Possible cause
Remedial measures
unusual noises
Bearing damaged / worn
Change bearings
In motor size 055
“
(Z
”
/
“
B
”
at cross
fl
ow) and 072 (O)
change the fan.
Impeller / blade drags /
scrapes
When indicated clear foreign bodies / dirt from the fan (see
"Impeller blocked or dirty")
Operation beyond tear-o
ff
point
(for axial fans)
Check for free air passages (supply/exhaust air
fl
aps,
fi
l-
ters)
Wrong overlap on nozzle
(for centrifugal fans)
Observe the installation instructions
7.2 Indication of the operating condition over A1 and A2
Via the output
“
A1 Status Out OC
”
a status
indication is possible (activation of a LED
Installation: Output A1 Status Out OC.
ON
:
“
A1 Status Out OC
”
= GND potential
A1 Status Out OC with
fl
ash code
11.02.2009
v_flash_explain.VSD
3 x
2 x
ON
OFF
4 x
5 x
6 x
1 x
7 x
8 x
9 x
Via the output
“
A2 Operation Out OC
”
an
operating indication is possible (activation of a
LED
Installation: Output A2 Operation Out
OC.
ON
:
“
A2 Status Out OC
”
= GND potential
A2 Operation Out OC
14.02.2011
v_on_off_explain.VSD
ON
OFF
A1 Status Out
OC
o
ff
GND = ON
A2 Operation
Out OC *
o
ff
GND = ON
Cause
Explanation
Reaction of Controller
Remedial measures
OFF
OFF
Mains voltage failure
Line voltage available?
Unit switch OFF and automati-
cally ON when the voltage has
been restored
ON
OFF
Normal operation without fault
Assembly instructions
ECblue
Diagnostics / Faults
L-BAL-F056-GB 2022/45 Index 005
Part.-No. 00700562-GB
33/44