Chapter 4 Servicing And Maintenance; Servicing And Maintenance; Cleaning; Information - Fault Causes - Helios RD Série Notice De Montage Et D'utilisation

Installation and Operating Instructions
CHAPTER 4
SERVICING AND
MAINTENANCE
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WARNING
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WARNING
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CAUTION
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RD.. and VD.. – Roof Fans
4.0

Servicing and maintenance

m WARNING
The fan must be isolated from the mains power supply and secure against being switched on again before
all cleaning, maintenance and installation work or before opening the terminal compartment!
– In principle, the units are maintenance-free. Nevertheless, all necessary maintenance work must be carried out by
qualified electricians, cf. section 1.6!
– Excessive deposits of dirt, dust, grease, etc. on the impeller, motor, protection guard and, above all, between the
housing and the impeller, are not permitted, as these can lead to an unbalance in the impeller, overheating of the
motor or the blocking of the impeller. In such cases, the unit must be cleaned, see section 4.1 Cleaning.
– If the fan has an important supply function, regular performance-related maintenance is necessary. In cases of longer
periods of standstill, maintenance must be carried out when the unit is restarted
– The following must be checked:
• Secure mounting of the fan
• Dirt deposits
• Damage
• Tightness of screw connections, particularly impeller mounting. Do not loosen screws in the process!
• Casing/impeller surface coating (e.g. rust, paint defects)
• Free movement of the impeller
• Bearing noises
• Oscillations, vibrations
• Current consumption according to type plate
• Function of safety components (e.g. motor protection switch)
The ball bearings used are maintenance-free under normal operating conditions and they are designed for a service life
of 20,000 hours. Regardless of the operating hours, the ball bearings must be replaced after 5 years at the latest due
to the ageing of the grease for reasons of preventative maintenance.
4.1

Cleaning

m WARNING
An insulation fault may result in electric shock!
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 1.6!
– Clean fan flow area as well as impeller and motor.
– Do not use aggressive cleaning agents that could damage the paintwork!
– High pressure cleaners or water jets are not permitted!
4.2 Information – Fault causes
The safety instructions specified in chapter 1, section 1.2 must be observed!
The elimination of faults must only be carried out by specialist personnel, cf. chapter 1.6!
Error/Fault
Fan does not start
Fuse tripped
Residual current device
tripped
Motor protection switch
triggered
Vibrations
Causes
No voltage, phase missing
Defective capacitor
Impeller blocked
Motor blocked
Short-circuited coil/ground fault in motor
Supply line/connection damaged
Connected incorrectly
Motor insulation damaged
Supply line insulation damaged
Tight bearing
Impeller touching
Incorrect operating point
Contaminated motor
Contamination
Bearing damage
Incorrect operating point
Attachment-related resonance
Incorrect direction of rotation
Impeller out of balance
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Solution
Check mains voltage
Check/replace capacitor
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 bearing
Clean, replace impeller if necessary
Check suitability of fan, Check/keep inflow
and outflow clear
Clean
Clean
Replace bearing
Check suitability of fan, Check/keep inflow
and outflow clear
Check or repair attachment , use vibration
damper
Check/modify connection
Rebalance by specialist
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