TM 9-4120-408-14
4-20. CONTROL MODULE TOP PANEL MAINTENANCE. (Continued)
a. Remove.
Remove 20
screws (Figure 4-14, 1), lock washers (2), flat washers (3), and control module top panel (4).
Discard lock washers (2).
b. Inspect.
1. Inspect control module top panel (4) for cracks, breaks, holes, and damaged or missing EMI/RFI gasket material
(5).
2. Inspect all mounting hardware for damage.
3. Replace all defective components.
c. Install. Position control module top panel (4) on control module (6) and secure with 20 flat washers (3), new lock
washers (2), and screws (1).
4-21. MODE SELECTOR SWITCH (S1) MAINTENANCE
This task covers:
Remove
Inspect
Test
Install
INITIAL SETUP:
Tools
Equipment Conditions (Continued)
Tool Kit, Service Refrigeration Unit,
Control Module Top Panel removed,
Materials/Parts
General Safety Instructions
Do not work on equipment without
following standard shop safety
Refer to TM 9-4120-408-24P for part
procedures.
numbers of items to be replaced.
Equipment Conditions
WARNING
Air Conditioner shut down,
Do not work on equipment with power
connected. Electrocution hazard is
Power disconnected, refer to applicable
present. Failure to obey this warning
technical manual.
may result in death or serious personal
injury.
a. Remove.
(1) Remove retaining screw (Figure 4-15, 1) and selector knob (2).
(2) Remove two switch mounting screws (3) and mode selector switch (4).
(3) Tag and disconnect all electrical leads.
b. Test. Test contacts on
mode selector switch (4) for closure in
accordance with table 4-5.
4-31