TM 10--3510--221--24
0034 00--1/2 blank
TYPICAL PT FAILURE
0034 00
THIS WORK PACKAGE COVERS:
Troubleshooting Typical Pressure Sensor Failure
INITIAL SETUP:
Maintenance Level
Equipment Conditions
Unit
Power must be applied at main control
enclosure (WP 0010 00).
NOTE
Occasionally fault messages may be displayed due to voltage transients. If a PT FAILURE
message is displayed, then goes away, the system is operating properly and can be
returned to normal operation.
1. Observe operator panel display.
Does ”PTXXX FAILURE” reappear?
YES Go to step 2.
NO Return to normal operation.
2. Use maintenance menu to examine status of VOLTAGE REFERENCE HI (WP 0010 00).
Does status indicate VOLTAGE REFERENCE HI in 9.20 to 9.24 VDC range?
YES Go to step 3.
NO Go to VREF(S) OUT OF RANGE FAULT (WP 0095 00).
3. Use maintenance menu to examine status of VOLTAGE REFERENCE LO.
Does status indicate VOLTAGE REFERENCE LO in .75 to .79 VDC range?
YES Go to step 4.
NO Go to VREF(S) OUT OF RANGE FAULT (WP 0095 00).
4. Use maintenance menu to examine status of suspect PT.
Does status indicate voltage is in .90 to 6.05 VDC range?
YES Return to normal operation.
NO Go to TYPICAL ANALOG INPUT SIGNAL FAULT (WP 0105 00).
END OF WORK PACKAGE
