A1 Status Out
OC
o
ff
GND = ON
A2 Operation
Out OC *
o
ff
GND = ON
Cause
Explanation
Reaction of Controller
Remedial measures
1 x
OFF
No enable = OFF
Switch o
ff
by Bus
Description Communication
ECblue MODBUS
2 x
OFF
Temperature management active
The device has an active temper-
ature management to protect it from
damage due to too high inside tem-
peratures. In case of a temperature
rise above the
fi
xed limits, the mod-
ulation is reduced linearly. To pre-
vent the complete system being
switched o
ff
externally (in this oper-
ation permissible for the controller)
in case of reduced operation due to
too high an internal temperature, no
fault message is sent via the A2.
With a drop in temperature the
modulation rises again llinear.
Check installation of the device
and cooling of the controller.
3 x
ON
HALL-IC
Incorrect signal from the Hall-ICs,
error in the commutation.
Internal plug connection faulty.
The controller switches the motor
o
ff
. Automatic restart if no faults
are recognised.
Replace fan / motor
5 x
ON
Motor blocked
If after 8 seconds of commutation
no speed is measured > 0 the fault
“
Motor blocked
”
is released.
EC-Controller switches o
ff
, re-
newed attempt to start after
about 2.5 sec.
Final shuto
ff
, when fourth starting
test fails.
It is then necessary to have a
reset by disconnecting the line
voltage.
Check if motor is freely rotatable.
6 x
ON
IGBT Fault
Short circuit to earth or short circuit
of the motor winding.
EC-Controller switches o
ff
, re-
newed attempt to start after
about 60 sec.
Code 9
Final shuto
ff
, if - following
a second starting test
–
a second
fault detection is detected within
a period of 60 seconds.
It is then necessary to have a
reset by disconnecting the line
voltage.
7 x
ON
DC undervoltage
If the DC-link voltage drops below a
speci
fi
ed limit the device will switch
o
ff
.
If the DC-link voltage rises above
the limit within 75 seconds, then
the cotroller will attempt to start.
Should the DC-link voltage stay
for more than 75 seconds below
the limit, the device will switch o
ff
with a fault message.
Assembly instructions
ECblue
Diagnostics / Faults
L-BAL-F056-GB 2022/45 Index 005
Part.-No. 00700562-GB
34/44
