NAVELEX EE 181-AA-OMI-110/E121 C-9412
Table 5-2. Troubleshooting Procedures - Continued
If meter indicates 0 ohms, replace power
(1) To remove power supply, pull main
circuit breaker to remove 120
vac from CU. Disconnect wires
from battery. As battery is
heavy, lift and turn it to remove
from bottom of CU enclosure.
Tag and disconnect wires from
TB2 and TB4. Remove screws
that secure cover, and remove
cover. Tag and disconnect
wires from TB1. Carefully re-
move screws that secure power
supply to side of CU enclosure.
Be careful not to drop it inside
CU. Note cable clamp under
screw near TB4 (bottom front).
Support power supply and turn
it so wires can be tagged and
disconnected from TB3 on
bottom of power supply.
(2) To install new power supply, re-
move cover, and turn unit so
TB3 is accessible. Support
power supply, and connect
wires to TB3. Turn power sup-
ply upright and position it over
standoffs on side of CU enclos-
ure. Note that cable clamp goes
under screw on bottom front of
power supply. Insert screws and
tighten to secure power supply.
Connect wires to TB1. Replace
cover and secure with screws.
Connect wires to TB2 and TB4.
Position battery outside CU en-
closure. Carefully insert battery
end first; turn and lower it into
bottom of CU enclosure. Con-
nect wires to battery terminals.
Switch on main circuit breaker.