Figure 1. ROWPU System Controller Exterior
5. On the applicable system controller, loosen the two captive screws (figure 1, item 1), and open the front
Take great care when working around electrical equipment. Contact between
unprotected body parts and electrical conductors can cause serious injury or
death. Do not wear jewelry or other conductive items while servicing energized
electrical equipment. Failure to comply with these precautions can cause seri-
ous injury or death.
6. Inside the applicable system controller, take voltage readings with a multimeter, measuring across connec-
tion points L1, L2, and L3 (figure 2, item 1), and across the INPUT 24VDC terminals (figure 2, item 2). Ensure
that all electrical circuits are deenergized. If voltage is present, verify that the correct circuit breakers are set
to OFF, locked out, and tagged out (FM 55-502). If no voltage is present, continue with the procedure.