Magnus 400 - Replacing the flow switch

Replacing the flow switch on Magnus 400

This procedure describes how to replace the flow switch.


Flow switch	Flow switch wiring

Verify that all components on the flow switch assembly are tightly secured.
In the Magnus Controller software, open the front door of the platesetter.
Quit Magnus Controller and turn off the platesetter.
Open the left-side door and the left-side panel.
Disconnect the harness, as shown under Images.
Disconnect the flow switch assembly from the inlet CPC port on the chiller and from the CPC port on the LDA head, as shown under Images.
Connect the updated flow switch assembly as follows:
1. Connect the short end of the flow switch assembly to the CPC port on the LDA head, as shown under Images.
2. Connect the long end of the flow switch assembly to the inlet CPC port on the chiller, as shown under Images.
Connect the two-pin minifit of the harness to the two-pin connector on the flow switch.
On the right side, connect the eight-pin minifit of the level signal harness to the eight-pin connector on the chiller.
Turn on the platesetter and start Magnus Controller.
During this procedure, the coolant level is expected to decrease, so you will need to refill the coolant after startup.
Turn off the chiller.
Refill the chiller with coolant.
Wipe away any spilled coolant.
Test the flow switch.

After the chiller has been operating for 30 minutes, verify the following:

No warning messages related to the flow switch appear.
As the flow meter indicator rises, its base reaches the following level:
- 50 Hz chiller: above 12 GPH
- 60 Hz chiller: above 22 GPH
The coolant level remains consistant for the two hours.
No leaks are present.
The chiller controller temperature, indicated by the upper red reading, is within the allowed range: 18.8° C—20.2° C.

Content owner: Mario Amir
See the Escalation page for escalation contacts.

27 Oct 2005