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Installation and Operating Instructions
ATTENTION
l m p r n
Roof fans – RD/VD EC
Before cleaning, isolate the fan from the mains power supply and protect against being switching on again!
– The disassembly of the unit or parts of the unit may be necessary for the cleaning.
This must be carried out by suitable specialist personnel cf. section 1.7!
– Clean fan flow area, impeller, struts and motor.
– Do not use aggressive cleaning agents that could damage the paintwork!
– High pressure cleaners or water jets are not permitted!
4�3 Information – Fault causes
The safety instructions specified in CHAPTER 1, section 1�3 must be observed!
The elimination of faults must only be carried out by specialist personnel, cf. section 1.7!
Error/fault
Fan does not start
Fuse tripped
Residual current device
tripped
Motor protection
switch triggered
Vibrations
Error/fault
Abnormal noises
Current consumption
too high
Fan does not perform
(speed)
4�4 Spare parts
Only original Helios spare parts are to be used. All repairs may only be carried out by authorised specialist personnel/
companies.
Causes
No voltage, phase missing
Setpoint signal missing
Impeller blocked
Motor blocked
Shorted coil/ground fault in motor
Supply line/connection damaged
Connected incorrectly
Motor insulation damaged
Supply line insulation damaged
Tight bearings
Impeller touching
Incorrect operating point
Motor dirty
Contamination
Bearing damage
Incorrect operating point
Attachment-related resonance
Impeller imbalance
Causes
Incorrect operating point
Impeller touching
Bearing damage
Mechanical damage
Incorrect operating point
Impeller touching
Bearing damage
Incorrect operating point
Incorrect voltage
Incorrect setpoint signal
Bearing damage
Contamination
Insufficient backflow
Temperature-dependent speed reduc-
tion active
9
Solutions
Check mains voltage
Check voltage
Clear blockage, clean,
replace impeller if necessary
Check motor, replace if necessary
Replace motor
Replace parts, replace motor if necessary
Check connection, change
Replace motor
Replace supply lines
Replace bearings
Clean, replace impeller if necessary
Check suitability of fan, Check/keep inflow
and outflow clear
Clean
Clean
Replace bearings
Check suitability of fan, Check/keep inflow
and outflow clear
Check or repair attachment, use vibration
damper
Rebalancing by a specialist company
Solution
Check suitability of fan, Check/keep inflow
and outflow clear
Clean, replace if necessary
Replace bearings
Perform maintenance
Check suitability of fan, Check/keep inflow
and outflow clear
Clean, replace if necessary
Replace bearings
Check suitability of fan, Check/keep inflow
and outflow clear
Check connection/change
Check voltage
Replace bearings
Clean
Enlarge backflow openings
Check air flow temperature or ambient
temperature for permissible limit values (see
type plate)
EN
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