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EIOM v2018.04
General:
Before starting any inspection work, fans must be disconnected from voltage and all safety requirements must be followed.
Possible solutions if the fan does not rotate:
• Check connectors and contacts;
• Check if the electrical connection of the motor is correct;
• Check if the wires of the control cable is not mixed;
• Check if the voltage supplied to the motor;
• Check if motor safefty switch is turned on;
After starting the device, check if:
• The motors rotate smoothly, do not vibrate and do not produce side noise;
• Airflow produced by the device matches air direction indicated on the housing;
• Thermal protections of the motor are not activated;
• Overcurrent (overload) protections of the motor are not activated;
• Motor speed changes when adjusting the control (when the device has built-in control system).
3.2 FANS WITH AC MOTORS (2 SPEED)
(1) (2)
Figure 3.2.1 – AC motor (2 speed) wiring diagram:
(1) - Low speed Star (Y) connection; (2) - High speed Double Star (YY) connection.
Thermal protection contacts of the motor (if any) must be connected using the terminals in the motor junction box.
NOTE: For more information, control, maintenance, diagnostics and troubleshooting refer to AC motors technical specification
General:
Before starting any inspection works, fans must be disconnected from voltage and all safety requirements must be followed.
Possible solutions if the fan does not rotate:
• Check connectors and contacts;
• Check if the electrical connection of the motor is correct;
• Check if the wires of the control cable is not mixed;
• Check if the voltage supplied to the motor;
• Check if motor safefty switch is turned on;
After starting the device, check if:
• The motors rotate smoothly, do not vibrate and do not produce side noise;
• Airflow produced by the device matches air direction indicated on the housing;
• Thermal protections of the motor are not activated;
• Overcurrent (overload) protections of the motor are not activated;
• Motor speed changes when adjusting the control (when the device has built-in control system).
3.3 FANS WITH EC MOTORS
Figure 3.3.1 – EC fans with connection box (Motor size “D” and “G”):
(1) - Cover of controller housing; (2) - Cable seal insert for two cables (applicable only if necessary): motor size “D”: 3 x M16 + 1 x seal
insert with two holes 5 mm; motor size “G”: 3 x M20 + 1 x seal insert with two holes 6 mm; (3) - Cable entry points with plastic fastener; (4) -
