TM 9-4120-411-14
(1) Support control box panel (3) then remove 16 screws (4), lock washers (5), and flat washers (6). Carefully
pull control box panel away as far as wire leads will allow. Discard lock washers.
(2) Support control box assembly (50) in place then align mounting holes and secure with 11 flat washers (59),
lock washers (58), screws (57), flat washers (56), new lock washers (55), and nuts (54).
(3) Install three grommets (53).
(4) Push eight orange wire leads (52) into control box assembly (50). Connect each of the wire leads to circuit
board (51) using tags and wiring diagram figure 4-14. Remove tags.
(5) Push the 10 blue wire leads (49) into control box assembly (50). Connect each of the wire leads to circuit
board (51) using tags and wiring diagram figure 4-14. Remove tags. Secure the wire leads to control box
assembly using small tiedown strap (48). Cut to remove excess tiedown strap material.
(6) Remove terminal grommets (47) from the three NBC blower outlets (44) (J, J2, and J3) and install onto wire
leads (43) using tags and wiring diagram figure 4-14. Solder wire leads onto three NBC blower outlets per
three NBC blower outlets. Insert the four remaining wire lead ends into power box assembly (46) then
connect them using tags and wiring diagram figure 4-14. Remove tags. Secure wire leads in power box
assembly using three large tiedown straps (45). Cut to remove excess tiedown strap material.
(7) Locate the cable (38) that goes to outside coil temperature sensor (39) (RT3). Connect wire leads with two
using two large tiedown straps (41) and three small tiedown straps (42). Cut to remove excess tiedown
strap material.
(8) Locate the cable (34) that goes to indoor temperature sensor (35) (RT2) located on volute assembly (12).
Remove tags. Secure cable using six large tiedown straps (37). Cut to remove excess tiedown strap
material.
(9) Locate the two cables (28) that go to cover switch (29) (S1) and outdoor temperature sensor (30) (RT5).
Remove tags. Secure cables using two large tiedown straps (32) and two small tiedown straps (33). Cut to
remove excess tiedown strap material.
(10) Insert the three cables (21) that go to low pressure cutout switch (23) (S2), high pressure cutout switch (24)
(S3), and (FDECU-2 ONLY) crankcase temperature switch (25) (RT4) into compressor (22). Connect wire
Secure cables using 10 large tiedown straps (27). Cut to remove excess tiedown strap material.
(11) Loosen compression nut (19) then slide strain relief fitting (17) off cable (16). Feed cable through lanyard
(20) then slide strain relief fitting onto cable far enough to leave one inch of the cable extending from the
strain relief fitting and tighten compression nut.
(12) Remove locking nut (15). With sealing washer (18) in place, install cable (16) with strain relief fitting (17)
into volute assembly (12) and secure with locking nut.
(13) Install two new tab housings (14) onto cable wire lead tabs (13).
4-101