TM 55-1930-209-14&P-2
Figure 4-1. ROWPU Control Station Schematic
f.
Check transformer input voltage across points L1 and L2. If voltage is not 440, replace wires to
transformers. If voltage is 440, check transformer output voltage across points X1 and X2. If voltage is
not 110, replace transformer. If voltage is 110, go to step g.
g.
Open (OFF) and secure power panel 1 circuit breaker 1P5 and check motor controller continuity as
follows:
(1)
Check continuity of wires from X1 to TB1. If check indicates a closed circuit, go to step h. If
check indicates an open circuit, check continuity of wire from points X1 to J1 and from points J1
to TB1. If check indicates an open circuit, replace faulty wire. If checks indicates all closed
circuits, replace fuse.
4-15
