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ELAPSED TIME Meter A1M5
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TM-11-6130-377-14 Inverter Power Static PP-7078/U Manual
Next
Heat Sink Duct Mounted Fan
TM 11-6130-377-14
b. Open front indicator panel to gain access to
(7) Support the replacement fan assembly
and attach the electrical leads to the fan terminals
interlock switch.
making a good mechanical joint then solder the
c. Remove two screws securing the door interlock
electrical leads to terminals.
switch to the right side panel angle.
(8) Position the fan on the mounting brackets
d. Lift and support the door interlock switch and
and align the screw holes.
tag all electrical leads to ensure proper reassembly.
(9) Install  the  four  screws  through  the
e. Remove the switch terminal screws and remove
mounting bracket and fan housing and install the
the electrical leads.
lockwashers and nuts. Tighten nuts.
f. Install the electrical leads on their proper switch
(10) Install the air filter and filter screen
terminals and secure with screws and washers.
assembly as described in paragraph 4-11.
g. Position door interlock switch on right side panel
(11) Perform equipment starting procedures
and angle and align mounting holes.
(para 3-3) and operation of fans (para 4-8) to check for
h. Install two screws through angle and into switch.
proper performance.
Tighten screws.
b. Right Side Panel Mounted Fans (fig. 2-1 and 6-
i. Close front indicator panel and secure four
1).
captive screws.
(1) Position DC circuit breaker A1CB1 to
I. Perform equipment starting procedure (para 3-
OFF.
3).
(2) Remove the screen assembly and air filter
from the fan to be changed, to gain access to the fan
6-18.
Cooling Fan Removal and Replacement
mounting screws (para 4-11a).
(3) Remove twelve screws and lockwashers
The inverter is equipped with five cooling fans.
securing the top cover of the inverter and remove the
Two cooling fans are located on the front panel
cover.
assembly near the lower edge (fig. 2-1), and two are
(4) Loosen the jam nuts of the lifting eyes on
located on the right hand side panel near the top edge
the right side of the inverter and unscrew the lifting
(fig. 2-1). The fifth cooling fan is located in the heat sink
eyes.
duct assembly (fig. 6-1). Use the appropriate procedure
given in a, b or c below to remove or replace the cooling
(5) Remove the cap screws securing the right
fans.
side panel to the upper front and rear brace angle.
a. Front Panel Mounted Fans (fig. 2-1 and 3-1).
CAUTION
(1) Position DC circuit breaker A1CB1 to
When moving the side panel care
OFF.
should be used to prevent damage to
(2) Remove the screen assembly and air filter
electrical  leads  still  attached  to
from the fan to be changed, to gain access to fan
components.
mounting screws (para 4-11a).
(6) Remove the cap screws securing the right
(3) Open front indicator panel to gain access
side panel to the base subassembly and platform. Right
to the cooling fan.
side panel is free to be moved.
(7) Tilt the right side panel outboard from the
NOTE
top to gain access to the fan mounting hardware.
Support the fan assembly to take the
strain from the electrical leads when
NOTE
performing the following substeps
Support the fan assembly to take the
(4), (5), and (6).
strain from the electrical leads when
performing the following substeps
(4) Remove four screws, lockwashers and
(8), (9) and (10).
nuts securing the fan assembly to the fan mounting
brackets.
(8) Remove four screws, lockwashers and
(5) Tag all electrical leads to ensure proper
nuts securing the fan assembly to the fan mounting
reassembly.
brackets.
(6) Using a 25 watt soldering iron, unsolder
the leads from the fan terminals and remove the fan.
Change 1
6-15

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