DA 820 LPC • DA 820 • ECT 820 • DCT 820 Fans
Technical User Guide
59
6 Troubleshooting guide
Remember to shut the fan off at the power supply isolator prior to troubleshooting.
Troubleshooting flap system
LPC/motor response
Status LED
Error
Solution
Inlet flap will not close/
open
Flashing
quickly**
Flap touches the ventilation
duct (obstructed).
Remedy the damage.
Linkage between flap and gear
faulty.
Replace defective parts.
-
ON/OFF signal from controller /
manual operation is lacking.
See section cable plans and circuit
diagrams.
Inlet flap is not operat-
ing
-
Lacking 24 V DC supply volt-
age
Check 24 V DC supply voltage.
Check assembly according to the
connection and circuit diagram.
Gear motor is not running.
Check if the connector is mounted.
Replace the gear motor.
* For LED indications, see section LED indication on the motor controller.
Troubleshooting fan motor
Fault symptom
Status LED
Error
Solution
Abnormal noise coming
from fan.
-
Faulty mounting.
Check in accordance with the docu-
ment. Retighten if required.
Bearing noise.
Replace the motor.
Vibrating fan.
Check whether fan blades are de-
fective, correctly assembled or dirty.
Replace or clean.
Fan motor is not run-
ning.
-
AC motor: Motor protection
switches off
Check the size of the protective mo-
tor switch, see section Technical
data.
Replace motor protection, change
to correct size.
Check whether the fan motor is
blocked.
Remove the blocking.
Too high negative pressure in the
livestock house,
check the air inlets.
AC motor:
Control voltage to motor con-
tactor
Check signal to contactor.