17
CHAPTER 8
CARE AND
MAINTENANCE
8.0
Care and maintenance
Safety instructions listed in Chapter 1.2 must be observed!
-
Prior to all work always ensure that the fan unit is isolated from the
power supply and secured against restarting!
-
In principle the devices are maintenance-free; the unit is not user
serviceable. Nevertheless all necessary maintenance work must be carried
out by qualified electricians!
-
Excessive deposits of dirt, dust, fats etc. on the impeller, motor, protective
grids and especially between housing and impeller are not allowed; as it can
lead to heavy imbalance in the impeller, overheat the motor or even block
the impeller. In those instances the device has to be cleaned.
-
In case of no longer use the unit must be serviced before operation.
Should be examined:
Secure mounting of the fan / replace if in doubt
Remove contaminant deposits
Mechanical damage, shut down the device, replace damage parts
Firm seating of bolt connections, loosen screws
Housing quality (cracks, brittleness of the plastic)
Overrunning of the impeller, the impeller doesn`t run freely, note
possible causes of failure in Chapter 8.1
Bearing noise
Vibrations – see Chapter 8.1
Power consumption according to the specifications on the type plate –
see Chapter 8.1
8.1
Troubleshooting
Safety instructions listed in Chapter 1.2 should be observed!
Attention: If the impeller or motor is blocked allow 3 seconds for the restart
interval.
Causes
Solution
Fan doesn`t start
- No voltage
Mains voltage check
Check connection according to
wiring diagram
- Blocked impeller
Clear blockage, clean or replace
- Blocked motor
Contact Airflow Technical Support
Fuse Tripping
- Winding is short-circuiting
the motor
Contact Airflow Technical Support
- Damaged cable or
connector
Replace parts, if necessary replace
motor (Contact Airflow Technical
Support)
- Connected incorrectly
Check the connection, modify
Vibrations
- Contamination
Clean
- Mounting vibrancy
Check mounting, repair
Abnormal noises
- Grinding impeller
Clean impeller, replace
- Bearing damages
Contact Airflow Technical Support
- Mechanical damages
Perform maintenance
Fan doesn’t
perform properly
- Insufficient air flow
Check inflow and outflow / keep
clear
- Wrong voltage
Check connection / modify
- Contamination
Clean
- Insufficient back-flow
Extend back-flow
DANGER
DANGER
