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USER'S GUIDE R18 AXIAL FAN , Iss: 6.05.2021

DIAGNOSTICS & TROUBLESHOOTING

Fan does not start or run - alarm rele status OPEN or FLASHES:

Possible causes: missing power (no line voltage), low voltage (under 185V), 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/and return

defected fan to the manufacturer for repair or replacement.

ALARM RELAY DIAGNOSTICS

Alarm relay contact OPEN on ERROR. Alarm relay contacts capability: max. 2A-250VAC cos fi0.6, max. 3A-30VDC.

Errors on which alarm relay OPEN:

- Rotor locked in duration exceeding 10s.

- Motor winding overheating.

- Power module overheating.

- DC link undervoltage.

- Internal communication error.

The alarm relay needs approximately 3-4 seconds after switching on the line voltage to become operable - change contacts to status CLOSE if no

malfunction is detected.

MULTI COLOUR LED DIAGNOSTICS

GREEN STATUS:

- NO malfunction is detected.

ORANGE STATUS:

- Missing controll signal (if function 'Emergency operation' is active).

- Electronics / Motor / Power module high temperature.

- Break active.

RED STATUS:

- Rotor locked.

- Motor overheating.

- Power module overheating.

- DC link undervoltage error.

- Internal communication error.

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