Maintenance; Cleaning - Grundfos DID Montage- Und Betriebsanleitung

9.7.1 Result file
The result file is in .txt format and structured as follows:
Time YearMonthDay-HourMinuteSecond
System status Status of the monitoring system
Marks the beginning of the parameter data
P
block
Parameter value Value of the parameter
Parameter status Status of the parameter
Parameter private
Private status of the parameter
status
Upper alarm
If upper alarm was triggered = "U" else "-"
triggered
Lower alarm
If lower alarm was triggered = "L" else "-"
triggered
Marks the beginning of the controller data
C
block
Controller output
Output of the controller
[%]
Disturbance input Input of disturbance control
Status of the controller
0x0001 - General error
Controller status 0x0002 - Input error
0x0004 - Output error
0x0008 - Disturbance error
Operating mode of the controller
Controller 0 - "Stopped"
operating mode 1 - "Running"
2 - "Hold"

10. Maintenance

WARNING
Electric shock
- Switch off the power supply before connecting the
power supply cable and relay contacts.
- Do not dismantle the control unit.
- Maintenance and repair must only be carried out
by qualified persons.
- Observe the local safety regulations.
WARNING
Toxic material
- Parts of the DID can be contaminated with
dangerous chemicals or pathogenic germs.
- If the DID has been in contact with dangerous
chemicals or pathogenic germs, wear protective
clothing and take all necessary precautions to
prevent endangering your health when installing or
dismantling the DID.

10.1 Cleaning

The following components of the DID require periodical checks
and cleaning, the interval depends on the quality of the water in
which they are used. We suggest to check these components on
a monthly basis.
10.1.1 Inlet strainer
The strainer includes a filter that collects coarse material and can
foul. Therefore, a periodical check of the strainer is necessary.
We recommend to clean the filter in the following intervals:
• monthly
• if the flow drops, although all valves are open, the pump (if
installed) is working properly and the inlet pressure is suitable.
Cleaning the inlet strainer
1. Turn off the water flow.
2. Unscrew the cap from the strainer.
3. Remove the filter.
4. Rinse the filter with drinking water.
5. Remove any coarse materials from the strainer housing.
6. Reinsert the filter.
7. Screw the cap back onto the strainer.
10.1.2 Flow detector
The flow detector contains inner parts that can be affected by
fouling. It case the flow detector does not respond to flow
changes, it can be dismantled from the DID and carefully cleaned
with water and a soft brush.
Dismantling the flow detector
1. Turn off the water flow.
2. Disconnect the CU 382 control unit from the power supply.
3. Unscrew the hose connection.
4. Remove the hose.
5. Disconnect the wires of the flow detector from the CU 382.
6. Unscrew the flow detector.
7. Clean the flow detector carefully with water and a soft brush.
8. Screw in the flow detector back.
9. Reconnect the wires of the flow detector to the CU 382.
10. Refit the hose.
11. Screw on the hose connection.
10.1.3 Sensor
See the manual "Sensors" supplied with the sensor. Find the
manual "Sensors for DID" on Grundfos Product Center: (http://
net.grundfos.com/Appl/ccmsservices/public/literature/filedata/
Grundfosliterature-6119622.pdf).
10.1.4 Control unit CU 382
If necessary, clean the surfaces of the CU 382 control unit with a
damp and clean cloth.
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