Table 4-1. UNIT PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS) QUARTERLY SCHEDULE (cont)

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

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.

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)

Condenser Coil Guard

a. Remove, clean, and inspect.

WARNING

Compressed air used for cleaning

purposes will not exceed 30 psi (2.1 kg/

cm ). Do not direct compressed air

against the skin. Use goggles or full face

shield.

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