Part Replacement Instructions
900-0128-01-00 Rev C
5
Replacement of the Power Module
There are either one or two Power Modules per Radian inverter depending upon the Radian model.
Only one replacement is provided. Please identify the Power Module that needs replacement prior to
continuing. Contact OutBack Technical Support for assistance.
Tools
Flat screwdriver with small head (4 mm wide or less)
Socket wrench with 8-inch extension and 10 mm socket
1/2” (13 mm) wrench
Procedure
To replace the power module:
1.
The Power Module may have either two or three transformer wires connected to the PCBA Module, depending on
Radian model (see image A in Figure 3). Additionally, the Radian models use different types of terminal blocks to
secure the transformer wires.
2.
Note the locations of the wires for later reference. If possible, take a photograph of the wire placement prior to
disconnection. For some Radian models the type of terminal block shows markings on the terminal blocks
(L1=Black, L2=Red, N=Neutral) and below them on the circuit board (RIGHT XFMR, LEFT XFMR and NEUTRALS) that
identify the correct connections. For other Radian models there are only markings on the circuit board (L2-L, NEU-L,
L1-L, L2-R, NEU-R, L1-R) that identify the correct connections. Refer to Table 1 for model-specific locations of the
transformer wires, fan wires and ribbon cables.
3.
Disconnect these wires by one of two methods, depending on the type of terminal strip. If the terminal strip has
locking tabs, unlock them (pulling them to a perpendicular position so that they stand out from the board).
Unlocking each tab releases the tension on the wire. Repeat for the remaining wire(s) connected to the module
that is to be replaced. Pull the wires free from the terminals. (See image A in Figure 3.)
If the terminal block does not have locking tabs, insert the screwdriver horizontally into the terminal block slot for
each wire. Lever the screwdriver outward (from the back of the housing to the front). This releases the tension on
the wire. Repeat for the remaining wire(s) connected to the module that is to be replaced. Pull the wires free from
the terminals. (See image C in Figure 3.)
4.
Disconnect the fan wire from the PCBA Module for the Power Module that is to be replaced by pinching its
connector and pulling to the right. Refer to Figure 3.
5.
Disconnect the Power Module’s DC+ and DC– connections at the Radian inverter’s terminals by using a 1/2”
(13mm) wrench. These are present on the outside of the chassis on the bottom of the inverter. Remove the bolts
and washers and set aside.
6.
Disconnect the ribbon cable from the Power Module by pressing outwards on the clips and then pulling to the
right. This connection is within the Power Module. A rectangular gap is present for access to this connection. Refer
to Figure 4.
7.
Remove the battery terminal nuts which secure the Power Module to the chassis. These are present around the
DC+ and DC– terminals. Rotate them counterclockwise for removal. This may be done with a strap wrench if room
is available; otherwise, it may be necessary to pry them with a screwdriver. Refer to Figure 1.
It may be necessary to remove bus bars to facilitate the removal of these nuts. (If the GSLC is present, see the
GS
Load Center Installation Manual
for assembly and disassembly of these bus bars.) Set aside.
8.
Remove the two upper nuts located above the fan using the socket wrench with 10 mm socket. Refer to Figure 6
on the next page.
