JRC JMR-92 Series Field Service Manual page 725

Before removing the cables of the UPS battery, leave it for at least 5 min after removing its
fuse.
Not doing so may cause electric shock.
Be sure to remove the fuse of a new UPS battery before installing it.
Not doing so may cause electric shock.
Step 10 Put back the rear panel and check for LED lighting.
After replacing the UPS input filter, assemble to the original condition by repeating the same
procedure in the reverse order. Put back the wiring and perform setting in the following sequence.
(i) UPS output cable
(ii) UPS power cable
(iii) UPS battery blade fuse
(iv) Set the "Bat-Select" rotary switch of the UPS controller at "3.4."
While maintaining the OFF state of the circuit breaker for the power supply of the display unit,
turn ON the circuit breaker of the main power line and check that the LEDs of the UPS controller
turn ON/OFF as follows. For more information, refer to "4.3.9.1 Replacing the USP Input Filter:
ME-NAX-NEF/QUINT20."
LED
Alerm
Bat.-Mode
Bat.-Charge
Power In OK
Make sure that the ground cable of the European-style terminal block in the upper part of the
input filter is connected with the ground of the ship.
Chapter 4 Replacement procedure
Color
Red
Yellow
Green
4-504
ON/OFF Status
OFF
Flashing or
OFF
ON