Servicing The Product - Grundfos CUE Installation And Operating Instructions Manual

1. Switch off the power to the unit, and wait for the display to
switch off.
2. Press and hold [Status], [Main Menu] and OK at the same time
while switching on the power to the unit. The fan starts after
approximately 5 seconds or when you hear an audible click.

10. Servicing the product

CAUTION
Electric shock
Minor or moderate personal injury
‐
Before starting any work on the product, make sure
that the power supply has been switched off and that it
cannot be accidentally switched on.
‐
Touching the electrical parts may be fatal, even after
CUE has been switched off.
Conduct a functional test every 12 months to detect any failure or
malfunction of the STO functionality.
To conduct the functional test, perform the following steps:
• Remove the 24 V DC voltage supply at terminal 37.
• Check if the operating panel displays the alarm Safe Stop A68.
• Verify that the frequency converter trips the unit.
• Verify that the motor is coasting and comes to a complete stop.
• Verify that the motor cannot be started.
• Reconnect the 24 V DC voltage supply to terminal 37.
• Verify that the motor is not started automatically and restarts
only by giving a reset signal (via bus, Digital I/O or the RESET
button).
Related information
4. Installation requirements
30