Checking The Current Sensor; Setting The Type Code - Grundfos CUE Series Service Instructions Manual

4.5 Checking the current sensor

A defective current sensor sometimes shows itself as an earth
fault alarm which cannot be reset even when the motor cable has
been disconnected.
Testing the current sensor
1. Disconnect the motor cable from the terminals of CUE.
2. Switch on CUE.
3. Check the reading of the input power (display 2.7).
4. If the display shows another value than 0 W or if the earth fault alarm does not disappear if the motor cable is removed, the fault
causes are:
• Type code has not been set. See section
• Defective current sensor.
Physical position of the current sensor:
– Enclosures B1, C3, C4: On the power board.
– Enclosures B2, B3, B4: On the SMSP board.
– Enclosures C1, C2: On the current sensor board.

4.6 Setting the type code

If the power and/or SMPS board has been replaced, the CUE
type code must be set. The setting can be carried out by means
of the operating panel or PC Tool E-Products. The correct type
code is on the CUE nameplate.
1. Enter the value 00006100hex in parameter "14-29 Service
Code".
2. Enter parameter "14-23 Type code Setting" to access the
settings.
3. Select indexes [00] to [19] and enter values according to the
new type code.
4. Select index [20] and select "Save to EEPROM".
5. Alarm 251 "New Type code" appears on the display and the
drive is in trip locked state.
6. Power cycle the drive and reset the alarm.
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4.6 Setting the type code.