2. With two hands or strap wrench, turn cover (A) counterclockwise to loosen.
Unthread and remove cover.
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, Figure 10-25).
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, Figure 10-25).
2. Carefully lift LOI module (D) from LOI board (F).
Note the location of LOI connector (P).
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
terminals of electronics stack (N, Figure 10-25).
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, Figure 10-25).
3. Remove the solenoid coil assembly and washer.
4. Unthread and remove solenoid valve base.
Maintenance and service Manual
December 2022 00809-0500-4880
282 Emerson.com/Rosemount
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