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Page Title:
ELECTRICAL HEATER ELEMENTS MAINTENANCE |
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 TM 9-4120-430-14
UNIT MAINTENANCE
AIR CONDITIONER, COMPACT, HORIZONTAL
ELECTRICAL HEATER ELEMENTS MAINTENANCE
INSPECTION, TEST, REMOVAL, REPAIR, AND INSTALLATION
INITIAL SETUP:
Tools and Special Tools
Tool Kit, General Mechanics (Item 1, Table 2, WP 0067 00)
Materials/Parts
Lint Free Cloth (Item 9, WP 0069 00)
Dry Cleaning Solvent (Item 16, WP 0069 00)
Test Equipment
References
Wiring List and Schematic Diagram (WP 0038 00)
Heater Cutout Switch (WP 0034 00)
Personnel Required
One
Equipment Condition
Air conditioner shut down and cool.
Power disconnected form unit.
Top cover removed (WP 0018 00).
Junction box assembly partially removed (WP 0028 00).
Heater cutout switch S3 tested (WP 0034 00).
WARNING
Allow heating elements to cool for 15 minutes or more before touching.
WARNING
Ensure power source is disconnected.
INSPECTION
Heater Elements and Electrical Wiring
1.
Inspect for damage to elements (18) or leads (12 and 13). See figure 1.
2.
Replace damaged leads and bad elements.
Heater Support Brackets (4, 7, and 19)
1.
Inspect for warping or cracking.
2.
Replace as necessary.
Terminal Board (TB3) (20) and Marker Strip (21)
1.
Inspect terminal board for dents, breaks, nicks or damaged terminals.
0036 00-1
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