CHEMICAL PUMPS
TM 10-4610-232-34
Table 2-1. Direct Support Troubleshooting Guide (Continued)
MALFUNCTlON
TEST OR INSPECTION
CORRECTIVE ACTION
1.
Chemical pump(s) do not run. (Ref. Schematic diagram FO-1, sheet 6, schematic lines 621-627).
Step 7.
Shut down the ROWPU. Open the control panel and restart the unit. Push “RESET”, select system ”ON” and
“NORMAL” mode. Push the “Chemical Pump” start. Look at the indicating plungers on relays K3 (REF:
Interconnection diagram FO-2, Sheet 6), K4, K21 and K22 (REF: Interconnection diagram FO-2, Sheet 6). The
K3 plunger should be out and the rest in.
If the relay plungers are as noted, go to step 2.
If K3 is not correct, refer to control circuits operation mode troubleshooting.
If K4 is not correct, refer to control circuits system on/system standby troubleshooting.
If K21 or K22 are not correct, refer to product high pressure switch and feed high pressure switch
troubleshooting.
Step 2.
Start the raw water pump and watch motor starter MS3 (REF: Interconnection diagram FO-2, Sheet 10).
If it energizes (pulls in) go to step 4.
Step 3.
Shut down ROWPU and generator. Refer to electrical drawings in Appendix D. Check continuity, point-to-
point, from transformer T1(X1) (REF: Interconnection diagram FO-2, Sheet 10) to PB6(1B2) (REF:
Interconnectiondiagram FO-2, Sheet 11). Push in the indicating plungers on K4, K21 and K22 when checking
their contacts.
(a)
Repair any loose or damaged wire (para. 2-20).
(b)
Replace circuit breakers CB7 (REF: Interconnection diagram FO-2, Sheet 8) if open (para. 2-23).
(c)
Replace switch PB3 (REF: Interconnection diagram FO-2, Sheet 11) if open (para. 2-22).
(d) Replace relay K3 if its contact is open (para. 2-23).
(e)
Replace relay K4, K21 or K22 if their respective contact does not show continuity when the indicating
plunger is depressed (para. 2-23).
Step 4.
Shut down ROWPU and generator. Refer to electrical drawings in Appendix D. Remove the wires from the K1
and K2 (REF: Interconnection diagram FO-2, Sheet 6) contacts of relay K7 (REF: Interconnection diagram
FO-2, Sheet 7). Check continuity, point-to-point, from PB6(1B2) (REF: Interconnection diagram FO-2, Sheet
11) and K4(A2X) to K7(K1). Push in pushbutton PB9 (REF: Interconnection diagram FO-2, Sheet 11) when
checking continuity across it. Repeat the procedure from transformer T1(X2) to K7(K2).
(a)
Repair any loose or damaged wire (para. 2-20).
(b) Replace circuit breaker CB8 (REF: Interconnection diagram FO-2, Sheet 8) if open (para. 2-23).
(c)
Replace switch PB8 (REF: Interconnection diagram FO-2, Sheet 11) if open (para. 2-22).
(d) Replace switch PB9 if it does not close when pushed in (para. 2-22).
Step 5.
Check continuity, point-to-point, from PBB(1B1) and PB9(1A4) to K7(K1). Push in the indicating plungers on
K1 and K7 when testing across their contacts.
(a)
Repair any loose or damaged wire (para. 2-20).
(b) Replace K1 or K7 if their contacts do not close when the plunger is pushed in (para. 2-23).
Step 6.
Check continuity, point-to-point, from K7(K1) to J12I, J12R and J16A (REF: Interconnection diagram FO-2,
Sheet 9).
(a)
Repair any loose or damaged wire (para. 2-20).
(b)
Replace/repair either J12 or J16 if either assembly is faulty (para. 2-21).
(c)
Replace relay K7 if all the continuity checks performed in steps 15-17 have not solved problem (para.
2-23).
2.
Chemical pumps run but light does not come on. Light test okay. (Ref. Schematic diagram FO-1, sheet 6, schematic
lines 610-611).
Shut down ROWPU and generator. Refer to electrical drawings in Appendix D. Remove the #2B wire from PL9 (REF:
Interconnection diagram FO-2, Sheet 11). Check continuity, point-to-point, from transformer T1(X1) (REF:
Interconnection diagram FO-2. Sheet 10) to PL9 (wire 237). Push in the indicating plunger on relay K7 (REF:
Interconnection diagram FO-2, Sheet 7) when checking its contact. Check continuity from T1(X2) to PL9 (wire #2B).
(a)
Repair any loose or damaged wire (para. 2-20).
(b) Replace relay K7 if its contact does not close (para. 2-23).
(c)
Replace PL9 if all continuity checks are satisfactory (para. 2-22).
Change 1 2-33
