DA 820 LPC • DA 820 • ECT 820 • DCT 820 Fans
60
Technical User Guide
Troubleshooting fan motor
Fault symptom
Status LED
Error
Solution
AC motor:
Power supply to the motor
Measure the voltage going to the
motor.
LPC motor:
See Troubleshooting LPC mo-
tor controller
-
Fan motor running and
does not turn off.
-
AC motor:
24 V DC supply to the winch
motor is lacking. (Terminal H1)
Check 24 V DC supply voltage.
Troubleshooting LPC motor controller
Fault symptom
Status LED
Error
Solution
Stopped after 5 restart
attempts caused by the
same error within 60
minutes
Emits red
light*
Supply voltage too high.
Measure the supply voltage.
Power consumption of the mo-
tor too high.
Check for motor errors.
Phase errors; one or more
phases interrupted (L1, L2, L3).
Measure the voltage between the
phases.
Blocked impeller.
Remove the blocking.
Wrong direction of rotation.
Invert the rotation direction.
Phase error on the motor sup-
ply (U, V, W).
Measure the voltage going to the
motor.
Internal communication error.
Replace LPC motor controller.
Reduced performance
Flashes red*
Supply voltage too low.
Measure the supply voltage.
Internal temperature of the LPC
motor controller too high
(>95°C).
Check the assembly of LPC motor
controller, see section Mounting the
motor controller.
Motor current has reached its
limit value
If the negative pressure in the live-
stock house is too high, check the
air inlets.
Error in internal circuit of the
LPC.
Replace the LPC motor controller.
Ripple voltage too high
Measure the supply phases.
Fan motor is not run-
ning
Emits green
light
Signal from climate controller
(10V = stop terminal 5).
Check signal from the controller.
Start/stop signal (24 V = stop
terminal 8).
Check signal from the winch motor.
No light
No power from power supply.
Check power supply.
Defective LPC motor controller. Replace the LPC motor controller.
* For LED indications, see section LED indication on the motor controller.