Table 3-1. Direct Support Troubleshooting-continued
TEST OR INSPECTION
ROWPU ASSEMBLY - continued
INOPERABLE DISSOLVED SOLIDS MONITOR SYSTEM (Models WPES-10, H-9518-1, WPES 30 and
Remove cover from TDS monitor and check for blown/defective fuse and disconnected wires.
Replace fuse and/or reconnect cable assembly. Refer to Paragraph 3-20.
Check for 115 VAC at TDS MONITOR POWER jack, J12.
If voltage is measured, go to step 4.
Shut down power source and perform a point-to-point continuity check of power
If CB8 is open (in ON position), replace it. Refer to Paragraph 3-53.
If wiring is open, tighten connections and/or replace defective wire.
Check for defective sensor as follows:
High voltages in this equipment can cause serious injury or death. When applying power
during a test, take proper measures to ensure safety of personnel. Never work on
electrical equipment unless there is another person nearby who is familiar with the
operation and hazards of the equipment.
Disconnect sensor at product water pipe.
Check continuity as follows:
Check Point A
Check Point B
Required Value in Ohms
Pin B, J11
0 - 0.2
Pin A, J11
0 - 0.2
8 - 10K
All other pins
Repair defective TDS monitor cable assembly. Refer to Paragraph 3-36.
3-16 Change 1