TM 10--3510--221--24
0074 00--1/2 blank
TF FLOW LO
0074 00
THIS WORK PACKAGE COVERS:
Troubleshooting TF Flow Lo Fault
INITIAL SETUP:
Maintenance Level
Materials/Parts
Unit
Tools and Special Tools
Equipment Conditions
Tool Kit, General Mechanics (Item 1, WP 0272 00)
Power must be applied at main control
enclosure (WP 0010 00).
1. Observe operator panel display.
Does ”PT301 FAILURE” or ”PT302 FAILURE” appear?
YES Go to TYPICAL PT FAILURE (WP 0034 00).
NO Go to step 2.
2. Check operation of TF pump.
Is TF pump operating?
YES Go to step 3.
NO Go to TF PUMP DOES NOT TURN ON FAULT (WP 0085 00).
3. Check TF plumbing for class II or III leakage.
Are any leaks found?
YES Repair leaks as necessary. Replenish TF supply (WP 0169 00).
NO Go to step 4.
4. Check for proper positions on all isolation valves (WP 0169 00).
Are isolation valves in proper positions?
YES Go to step 5.
NO Properly position valve(s). Return to normal operation.
5. Check TF level in expansion tank (WP 0169 00).
Is TF level low?
YES Replenish TF supply. Return to normal operation.
NO Clean TF pump strainer (WP 0170 00). Go to step 6.
6. Use maintenance menu to test heating system (WP 0010 00). Observe operator panel display.
Does ”TF FLOW LO” reappear?
YES Check for blockage or water in TF plumbing.
NO Return to normal operation.
END OF WORK PACKAGE
