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SERVICING AND MAINTENANCE.
WARNING: THE FAN AND ANCILLARY CONTROL EQUIPMENT MUST BE ISOLATED
Maintenance should be performed only by the trained and qualified personnel.
Fan bearings do not require any maintenance.
If the fan is not equipped with the air filter the only requirement for the maintenance of the fan is to clean
the impeller. It is recommended that the impeller should be cleaned at least once every six months.
Before cleaning it is necessary to disconnect the supply voltage and block the switch in order to prevent
the accidental start-up.
It is necessary to wait until any mechanical movements will stop, the motor will cool down and the
connected capacitors will discharge. Please make sure that the fan and its parts and accessories are
mounted firmly and tightly.
The impeller should be cleaned with caution in order not to disturb the balance of the impeller.
When cleaning the impeller it is strictly forbidden to use any mechanical cleaners, chemical agents,
detergents, compressed air flow and any liquids.
It is forbidden to wash the fan with any liquids.
After the maintenance procedure the device should be installed into the duct system performing the
steps indicated in the installation and start-up sections and observing the requirements listed in this
document.
The SDX EC fans have sealed for life bearings, which do not require lubrication.
IMPROPER OPERATION AND REPAIR
Repair works should be performed only by the trained and qualified personnel.
•
After turning off the device the following steps should be performed:
•
Check if the supply voltage and current correspond to the requirements provided on the product
label.
•
Check if the electric current is supplied to the device.
•
After solving problems related with the supply of the electric current, restart the device.
If the power supply is not interrupted, but the device does not start the following steps should be
performed:
•
Wait for 10-20 minutes until the motor cools down.
•
If the motor starts automatically within 10-20 minutes without disconnecting the power supply, it
means that the automatic thermal protection has
been turned on. It is necessary to determine the cause of the motor overheating and to eliminate
the problem.
If the motor does not start within 10-20 minutes, the following steps should be performed:
•
Disconnect the supply voltage
•
Wait until any mechanical movements will stop, the motor will cool down and the connected
capacitors will discharge.
•
Ensure that the impeller is not blocked.
•
Check the capacitor (for single-phase fans – according to the connection scheme). If the problem
persists, replace the capacitor.
If this does not help, it is necessary to contact the supplier.
FROM THE POWER SUPPLY DURING MAINTENANCE.
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