Grundfos CUE Series Installation And Operating Instructions Manual page 29

10.7.16 Motor bearing monitoring (3.19)
The motor bearing monitoring function can be set to these values:
• Active
• Not active.
When the function is set to Active, the CUE will give a warning
when the motor bearings are due to be relubricated or replaced.
Description
The motor bearing monitoring function is used to give an
indication when it is time to relubricate or replace the motor
bearings. See display 2.10 and 2.11.
The warning indication and the estimated time take into account if
the pump has been running with reduced speed. The bearing
temperature is included in the calculation if temperature sensors
are installed and connected to an MCB 114 sensor input module.
The counter will continue counting even if the
Note function is switched to Not active, but a warning
will not be given when it is time for relubrication.
10.7.17 Confirming relubrication/replacement of motor
bearings (3.20)
This function can be set to these values:
• Relubricated
• Replaced
• Nothing done.
When the motor bearings have been relubricated or replaced,
confirm this action in the above display by pressing "OK".
Relubricated cannot be selected for a period of
Note
time after confirming relubrication.
Relubricated
When the warning Relubricate motor bearings has been
confirmed,
• the counter is set to 0.
• the number of relubrications is increased by 1.
When the number of relubrications has reached the permissible
number, the warning Replace motor bearings appears in the
display.
Replaced
When the warning Replace motor bearings has been confirmed,
• the counter is set to 0.
• the number of relubrications is set to 0.
• the number of bearing changes is increased by 1.
10.7.18 Temperature sensor 1 (3.21)
This display is only shown if an MCB 114 sensor input module
has been installed.
Select the function of a Pt100/Pt1000 temperature sensor 1
connected to an MCB 114:
• D-end bearing
• ND-end bearing
• Other liq. temp. 1
• Other liq. temp. 2
• Motor winding
• Pumped liq. temp.
• Ambient temp.
• Not active.
10.7.19 Temperature sensor 2 (3.22)
This display is only shown if an MCB 114 sensor input module
has been installed.
Select the function of a Pt100/Pt1000 temperature sensor 2
connected to an MCB 114:
• D-end bearing
• ND-end bearing
• Other liq. temp. 1
• Other liq. temp. 2
• Motor winding
• Pumped liq. temp.
• Ambient temp.
• Not active.
10.7.20 Standstill heating (3.23)
The standstill heating function can be set to these values:
• Active
• Not active.
When the function is set to Active and the pump is stopped by a
stop command, a current will be applied to the motor windings.
The standstill heating function pre-heats the motor to avoid
condensation.
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