USER'S GUIDE R14 AXIAL FAN , Code: 0000, Iss: 21.09.2021
06
PUTTING INTO OPERATION
Before first start you should check:
a. Appropriate installation and electrical connection, especially resistance of the protective-earth (PE) circuit (max. 100m
Ω
).
b. If safety equipment is in place and motor protection device is in function.
c. If the impeller can rotate freely once the unit is mounted and the right direction of rotation is assured.
Only if all dangerous situations are excluded, the fan may be put into operation!
Switch ON the power supply.
Switch ON the device via the control signal and apply the speed setting voltage/signal and check the direction of the rotation and the smoothness of
running.
07
DIAGNOSTICS & TROUBLESHOOTING
Fan does not start or run - alarm rele status OPEN or FLASHES:
Possible causes: missing power (no line voltage), low voltage (under 320V), extremely thermally or mechanically overloaded or fan failure (short circuit
of electronic or windings).
Check line voltage, check value and polarity of control signal, check that rotor is free to rotate.
Fan does not start or run - alarm rele status CLOSE:
Possible causes: missing or inadequate control signal.
Check value and polarity of control signal.
Fan runs with half of desired speed - alarm rele status CLOSE:
Possible causes: Low supply voltage, inadequate control signal or fan overheating.
Check line voltage, check control signal, check temperature and sufficient airflow of cooling air or loss of motor cooling.
Attention !
In the event of fan failure is detected (short/open in circuit of electronics/windings), never try to repair the fan, but replace it with new one or return it to
the manufacturer for repair or replacement.
08
PROTECTIVE FEATURES
Short-circuit protection:
The motor and electronic has no protection functions against short circuit. Short-circuit protection must be provided with an external means - for
example with using a circuit breaker of max. 3x16A / 400V type B.
Locked-rotor protection:
As soon the rotor is blocked, the motor is switched off electronically. After de-blocking, the motor will restart automatically.
Mains under voltage:
If mains voltage falls below the nominal value the motor will keep running with degraded performance. Below 320V, the motor will be switched off
electronically in stand-by mode. When mains voltage returns to correct value, the motor will restart automatically.
In the specific case, the undervoltage protection may switch off the fan to stand-by mode, for example, fan running or testing at high pressure drop and
low voltage.
Over temperature protection:
Internally connected thermal overload protector to protect electronic and motor against over temperature.
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