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

Condenser Fans and Motor

a. Wipe or vacuum all dust and dirt from fans and motor,

and all other components and surfaces in the

immediate area.

b. Inspect the fans for damage or bent blades, the motor

for signs of overheating, and all mounting hardware for

tightness and security.

c. Inspect the wiring harness for damage or chafing, and

all electrical connections for tightness.

Operation Checks

REINSTALL THE FOLLOWING ITEMS:

Condenser Coil Guard

Fresh Air Filter and Frame

Conditioned Air Filters and Covers

Lower Front Panel

Conditioned Air Intake Grille

Mist Eliminator

Top Panel

Conditioned Air Outlet Grille

Fabric Cover

Check to be sure that all items are back in place and

secure.

a. Be sure the mode selector switch is in the OFF position

and reconnect input power.

NOTE

If power has just been connected to unit,

a short (30 minute maximum during very

cold weather) warm up period is required

for COOL mode operation. When

compressor reaches a safe operating

temperature, it will come on automatically

if the mode selector is in the COOL mode.

b. Check that the fabric cover is rolled up and secured.

c. Adjust conditioned air intake and outlet louvers to the

full open position.

d. Adjust fresh air damper to full closed position.

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