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6. Special function description and application
6.1. Internal protection functions
See addendum 8.1 for corresponding error codes. In case of error, the error
code will be displayed on the LinkTouch or can also be retrieved in the
DuraCloud application.
6.1.1. Overvoltage and undervoltage protection
• If the AC voltage is higher than 240V or lower than 208 V.
• Starting the motor is disabled.
• The following codes can be displayed: OV1 for overvoltage and UV1
undervoltage.
6.1.2. Over-current protection
• After the fault occurs, the controller stops the output and automatically
clears the fault and restarts after 10 or 30 seconds.
• After 3 consecutive errors, the motor will not restart and one of the
following error codes will be displayed: OC1, OC2, OC3, OC4.
6.1.3 IPM (Intelligent Power Module) protection
• In case of IPM failure, the motor will immediately stop running
• The following error code will be displayed: OC3.
• The controller will automatically clear the fault and will restart the pump
after 30 seconds.
• After 3 consecutive errors, the motor will not restart, and the fault can’t be
cleared. Only after a power cycle of the motor, the fault will be cleared.
• In case the OC3 alarm remains even after a power cycle, then this means
that the internal hardware has failed.
6.1.4. Overheat protection
• When the motor temperature is higher than 95 °C, the system will automa-
tically and gradually reduce the motor speed in steps of 50RPM to protect
the motor. When the temperature is too high, the system stops running.
The following error code will be shown: OH1.