TM 10-4610-241-24
TO 40W4-13-42
Table 3-1. Direct Support Troubleshooting-continued
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
7 .
ROWPU ASSEMBLY - continued
INOPERABLE DISSOLVED SOLIDS MONITOR SYSTEM (Models WPES-10, H-9518-1, WPES 30 and
H-9518-3)
Step 1.
Remove cover from TDS monitor and check for blown/defective fuse and disconnected wires.
Step 2.
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.
Step 3.
Shut down power source and perform a point-to-point continuity check of power
circuit.
Step 4.
a.
If CB8 is open (in ON position), replace it. Refer to Paragraph 3-53.
b.
If wiring is open, tighten connections and/or replace defective wire.
Check for defective sensor as follows:
WARNING
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.
a.
Disconnect sensor at product water pipe.
b.
Check continuity as follows:
Check Point A
Check Point B
Required Value in Ohms
Pin B, J11
Outer Electrode
0 - 0.2
Pin A, J11
Inner Electrode
0 - 0.2
Pin C
Pin D
8 - 10K
Pin E
All other pins
Infinity
Repair defective TDS monitor cable assembly. Refer to Paragraph 3-36.
3-16 Change 1
