DOL 38-2 Frequency Converter
28
Technical User Guide
6 Troubleshooting guide
Remember to shut the fan off at the power supply isolator prior to troubleshooting.
Troubleshooting shutter system
LPC/motor response
Status LED
Error
Solution
Shutter will not close/
open
Flashing
quickly**
Shutter touches the ventilation
duct (obstructed).
Remedy the damage.
Linkage between shutter and
gear faulty.
Replace defective parts.
-
ON/OFF signal from controller /
manual operation is lacking.
See section cable plans and circuit
diagrams.
Shutter is not operating
-
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/frequency converter.
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.
-
See Troubleshooting frequency
converter
-
Содержание 110451
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