Emerson Rosemount CT5400, Installation, Operation And Maintenance Manual

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7. Disconnect the three connectors (B, C, and D) of the gas/cell temperature
monitoring harness.
8. Remove the four cap head screws (L), spring washers (K), and flat washers (J).
9. Remove the peripheral PCA board (A) from the analyzer.
CAUTION!
ELECTROSTATIC DISCHARGE
Wear an ESD wrist strap or ground yourself to prevent damage to the replacement
peripheral PCA board.
10. Discard the unserviceable peripheral PCA board observing all local and federal laws
regarding disposal of electronics.
11. Remove the replacement peripheral PCA board from the shipping package and
inspect for damage. If damaged, contact your local Customer Care representative.
12. Place the peripheral PCA (A) in position on the PCB mounting plate. Secure the
peripheral PCA by fitting the four cap head screws (L), spring washers (K), and flat
washers (J) retained during the removal procedure.
13. Torque tighten the screws to 0.6 Nm.
14. Connect the three gas/cell temperature monitoring harness connectors (B, C, and
D).
15. Connect the cell heater relay wiring harness (E) to connector J50 on the peripheral
PCA.
16. Connect the two fan wiring harnesses (G and H) to connectors J4 and J18 on the
peripheral PCA.
It is not important which fan wiring harness is connected to which connector.
17. Connect the ribbon cable (F) to connector J2 on the peripheral PCA board (A).
18. Connect the 12 V power wiring harness (I) to connector J2 on the peripheral PCA
board (A).
19. Refit the top cover as described in Section 7.25 .
20. Reinstall the analyzer in the rack. This step requires two people to properly lift and
transport it to the rack.
21. Remove Lock-Out Tag-Out labels.
22. Apply power to restart the analyzer.
Troubleshooting and diagnostics
94 Rosemount CT5400