TM 9-4120-407-14
(5) Connect new wire lead(s) (1) to connector (6) and control panel (2) component(s) using control panel
(6) Secure wire leads with tiedown straps (7) as necessary.
d. Installation.
(1) Carefully pass the wire leads (1) through control panel (9) opening.
(2) Remove any remaining sleeving insulation (8).
(3) Secure wiring harness connector (6), using two screws (5), new lock washers (4), and nuts (3).
(4) Connect wire leads (1) to control panel (2) components using tags and control panel wiring diagram
NOTE
FOLLOW-ON MAINTENANCE:
Assemble and install the control panel. See para 3-20.
3-22. POTENTIOMETER TESTING AND REPLACEMENT.
c. Installation
This task covers:
b. Removal
a. Testing
INITIAL SETUP
Tools
Equipment Conditions:
Control panel removed and disassembled as
Service Refrigeration Unit Tool Kit
necessary to access potentiometer.
Materials/Parts
a.. Testing.
(1) Using multimeter set to measure resistance, check resistance between potentiometer (1) Figure 3-31
terminals 2 and 3.
NOTE
Figure 3-32 shows potentiometer
schematic diagram for reference.
and 60 ohms.
(b) Turn knob (2) fully counterclockwise (COOL). Multimeter should indicate a resistance of
between 4500 and 5500 ohms.
(2) Replace the potentiometer (1) if the resistance indicated is not within the values specified.
3-89