T M 1 0 - 4 6 1 0 - 2 3 2 - 12
Table 4-2. Unit Troubleshooting Guide (Continued)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Figure 4-3. Continuity Test Arrangement
1.
Figure 4-4. Short Circuit Test Arrangement
Booster pump won't start (SYSTEM NORMAL) (Reference Schematic Diagram FO-1, Sheet 6 schematic lines
625-631 control circuits - Reference Schematic Diagram FO-1, Sheet 5, schematic lines 540-542 power cir-
cults).
Step 1. Shutdown the ROWPU. Open the main control panel lower door. Check that the overload reset button
on MS7(Reference Interconnection Diagram FO-2, Sheet 10) is in by pushing it.
(a) If the reset button is in, go to step 2.
(b) If the button is out and won't reset, notify direct support maintenance to replace the overload
heaters on M57 and then go to step 3.
(c) If the reset button is out but resets when pushed, notify direct support maintenance to adjust
the door reset assembly for M57 and then go to step 3.
Step 2. Leave the control panel door open. Refer to para. 2-19 and start the ROWPU in “SYSTEM NORMAL”.
Watch the indicating plunger on the M57 motor starter. It should pull in when the booster pump is
started.
Change 1
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