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Maintenance and service
December 2022
2. With two hands or strap wrench, turn cover (A) counterclockwise to loosen.
3. Inspect O-ring (M) for wear or damage. Replace O-ring if damaged.
Remove Flash PROM
CAUTION
EQUIPMENT DAMAGE
Use electrostatic discharge (ESD) protection to avoid damage to the electronic
circuits.
Procedure
1. Locate the Flash PROM access port in the electronics stack (N,
2. Use a suitable IC removal tool to remove the Flash PROM (O).
Remove local operator interface (LOI) module and
board
Procedure
1. Remove three screws (E,
2. Carefully lift LOI module (D) from LOI board (F).
3. Remove two screws (G) and lockwashers (H). Remove LOI board (F).
Remove electronics stack
Procedure
1. Unplug power cable, signal cable, and solenoid lead connectors from
2. Remove two screws (G) and lockwashers (H).
3. Remove electronics stack (N).
Remove solenoid valves
Procedure
1. Disconnect solenoid leads from mating terminal connector.
2. Remove top nut of solenoid valve (I or J,
3. Remove the solenoid coil assembly and washer.
4. Unthread and remove solenoid valve base.
282
Unthread and remove cover.
Note the location of LOI connector (P).
terminals of electronics stack (N,
Figure
10-25).
Figure
10-25).
Figure
Manual
00809-0500-4880
Figure
10-25).
Emerson.com/Rosemount
10-25).
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