Metso ND9200F, Инструкция по установке, обслуживанию и эксплуатации

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7 ND92F 70 en 23
7.5 Notifications 8 TROUBLE SHOOTING
Mechanical/electrical defects
1. A change in the valve position setpoint will not affect
the position of the actuator
❑
Supply pressure too low
❑
Spool valve sticks
❑
Incorrect configuration parameters
❑
Actuator and/or valve jammed
❑
Signal wires incorrectly connected, no value on
display
❑
Circuit boards are defective
❑
Calibration and tuning has not been carried out
❑
Device is in manual mode
❑
Prestage is defective
❑
Device is in fail-safe mode
2. The actuator goes to the end position with a small
change of input signal
❑
Tubes between controller and actuator are incor-
rect, see Fig. 6
❑
The parameter settings PFA and ROT are incor-
rectly selected.
3. Inaccurate positioning
❑
Spool valve dirty
❑
Too high actuator load
❑
Supply pressure too low
❑
Spool or pressure sensors are defective
❑
Actuator leakage
4. Overshooting or positioning too slow
❑
Change PERF value
❑
Spool valve dirty
❑
Supply air tube too small or supply air filter dirty
❑
Valve sticks
❑
Check leakages in tubes between controller and
actuator
❑
Check leakages in mechanical stop screws
5. Error during valve travel calibration
❑
Valve controller is in MAN mode
❑
Check the coupling alignment with the pointer,
see Fig. 5.
❑
The parameter settings PFA and ROT are incor-
rectly selected
❑
The actuator or valve did not move or was stuck
during calibration
❑
Supply pressure too low
❑
Spool valve dirty
Display message Description
CALIBRATION
SUCCESSFULL
Position calibration
successfully performed.
TEST CANCELLED Off-line test has been
cancelled.
TEST DONE Off-line test has been
successfully performed.
TEST FAILED Off-line test failed. Repeat
the test sequence.
CALIBRATION CANCELLED Calibration has been
cancelled.
PARAMETERS BACKUP
RESTORED
Parameter backup database
has been activated.
PT NOT ACTIVATED (Only with position
transmitter option).
The position transmitter is not
energized.
1PT CAL FAILED 1-point calibration failed.
Check the mounting of the
valve controller. Verify input
parameter (range) value.
Check rotation parameter
(ROT).
TUNE OK Tuning has been
successfully performed.
REDUCED PERFORMANCE
DEACTIVATED
Spool valve measurement
and normal valve control is
recovered.