SMAR FY301, Инструкция по эксплуатации и техническому обслуживанию

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Maintenance Procedures
5.3
ERROR MESSAGES POTENTIAL SOURCE OF PROBLEM
UPPER AND LOWER RANGE VALUES
OUT OF LIMITS
- Both the upper and lower points are outside the positioner range limit.
SPAN TOO SMALL
- The difference, between the upper and lower points, is less than the allowed by the
positioner.
ACTUAL POSITION - The actual valve position was above of the upper range limit.
ACTUAL POSITION - The actual valve position was below of the lower range limit.
PASSED PARAMETER TOO LARGE - Parameter above operating limits.
PASSED PARAMETER TOO SMALL - Parameter below operating limits.
CONTROL LOOP SHOULD BE IN
MANUAL
- Indicates that the operation could affect the output.
CONTROL LOOP MAY BE RETURNED TO
AUTO
- After the operation is complete, you are reminded to return the loop to automatic
control.
Table 5.2 – FY301 Diagnostics with the Configurator
Disassembly Procedure for Maintenance
1. Apply air pressure in the positioner input, without applying power supply. Verify if there is any
air leakage in output 1 (OUT1). In case of air leakage in output 1, it is necessary to check the
mechanical parts.
2. Remove the restriction. Verify if the restriction is not obstructed. (See restriction cleaning
procedure).
3. Disassemble the equipment as shown:
Figure 5.1 – FY301 Disassembled
Maintenance – Mechanical Parts
1. Verify if the spool valve is moving freely.
2. Verify if the spool valve is not obstructed with dirty.
3. Verify if there is any obstruction inside the FY pneumatic block and at the exhausts.
4. Verify if the diaphragm integrity.
5. Verify if the nozzle is dirty.
Maintenance – Electronic Parts
Electronic Circuit
NOTE
The numbers indicated between parentheses refer to Figure 5.4 – Exploded View
.
To remove the plate of the circuit (
5
) and the indicator (
4
), first release the cover locking bolt (
6
)
from the side not marked "Field Terminals", and after that release the cover (
1
).