15
SilentBox® SB EC ... EC Centrifugal Fan Boxes
Installation and Operating Instructions
8.1 Fault causes
8.2 Troubleshooting for motors with LED display
–
Status Out with flash code
The following series are equipped with Status LED in the cover of the motor terminal compartment (Fig.18)
SB EC 315 A
SB EC 315 B
SB EC 355
SB EC 400 A
SB EC 400 B
“Flash” code
(Diagnosis see table below)
etc.
Fig.18
LED
3 x
2 x
ON
OFF
4 x
5 x
6 x
1 x
7 x
8 x
9 x
Fault
Causes
Solution
Fan does not start
– No voltage
Check mains voltage
Check connection according to wiring diagram
– Impeller blocked
Clear blockage, clean, replace if necessary
– Motor blocked
Contact Helios customer services
Fan does not turn
(no longer turns)
– Mains voltage failure
Check mains voltage
– Temp. monitoring system has
triggered
- Check/clear inflow and outflow
- Check transport media, ambient temperature
- Check mains voltage
– Fuse has tripped
«Fuse has tripped»
– Impeller is blocked or
contaminated
Clear blockage, clean, replace if necessary
Fuse has tripped
– Shorted coil in motor
Contact Helios customer services
– Supply line or connection
damaged
Replace parts, replace motor if necessary
(Contact Helios customer services)
– Connected incorrectly
Check, modify connection
Vibrations
– Contamination
Clean
– Attachment-related resonance
Check or repair attachment
Abnormal noises
– Grinding impeller
Clean impeller, replace if necessary
– Bearing damage
Contact Helios customer services
– Mechanical damage
Carry out maintenance
Fan no longer perfor-
ming (speed)
– Insufficient air delivery
Check/clear inflow and outflow
– Incorrect voltage
Check/modify connection
– Bearing damage
Contact Helios customer services
– Contamination
Clean
– Insufficient backflow
Widen backflow openings
EN