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Page Title: Table 4-1. UNIT PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS) QUARTERLY SCHEDULE (cont)
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TM 5-4120-393-14
Table 4-1. UNIT PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS) QUARTERLY SCHEDULE (cont)
Item
Item To Be
Procedures
No.
Inspected/Serviced
15
Junction Boxes
a. Check operation of circuit breaker and flexible cable to
remote reset knob for stiffness and binding.
b. Inspect all remaining wiring harnesses in the lower
section of the cabinet for damage or chafing, and all
electrical connections for tightness.
16
Cabinet Base
a. Wipe or vacuum all dust, dirt, sand, or other foreign
matter from surfaces and water passages in the base
assembly.
b. Check that water flows freely through the installed
condensate drain(s)
17
Condenser Coil Guard
a. Remove, clean, and inspect.
WARNING
Compressed air used for cleaning
purposes will not exceed 30 psi (2.1 kg/
2
cm ). Do not direct compressed air
against the skin. Use goggles or full face
shield.
18
Condenser Coil
a. Blow dust and dirt from the condenser coil in the same
manner as used for the evaporator coil in item 4. In
this case, blow from the inside for reverse airflow
direction.
b. Inspect coil for obvious damage, and all mounting
hardware for tightness and security.
4-31

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