TB-9-2320-279-13-1

TECHNICAL BULLETIN; AIR CONDITIONING SYSTEM

OPERATOR’S, UNIT AND DIRECT SUPPORT MAINTENANCE MANUAL, INSTALLATION INSTRUCTIONS, AND REPAIR PARTS AND SPECIAL TOOLS LISTS

DECEMBER 2005

TB-9-2320-279-13-1 - Page 104 of 524

TB 9-2320-279-13-1

0012-18

AC HEATER/EVAPORATOR BLOWER OPERATES BUT NO COLD AIR FROM

DUCTS DURING AC OPERATIONS - Continued

DRAFT

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

KNOWN INFO

Power to fan control switch OK.

Blower operates.

AC condenser core not blocked or damaged.

AC compressor belts OK.

AC heater/evaporator core not blocked or

damaged.

AC temperature control switch temperature

probe OK.

AC condenser motor solenoid OK.

AC condenser motor power wire OK.

AC condenser motor ground wire OK.

AC condenser motor OK.

AC condenser assembly harness black wire

OK.

AC harness wire 1155 OK.

AC condenser assembly harness green wire

OK.

AC condenser motor solenoid ground wire

OK.

Fan control switch OK.

Wire 1156 OK.

AC temperature control switch OK.

AC compressor clutch OK.

AC harness wire 1154 OK.

Low pressure switch OK.

AC harness wire 1156 OK.

AC harness wire 1158 OK.

High pressure switch OK.

Heater cable OK.

AC cable OK.

POSSIBLE PROBLEMS

Defrost cable faulty.

9.

Is defrost cable free from

damage and binding?

Replace defrost

cable (WP 0029).

Verify repair, go to

Step 27 of this fault.

NO

YES

Read WARNING on

page 0012-19.

WARNING

Go to work package 0015

(AC Does Not Cool Or Cools

Inadequately).

TEST OPTIONS

Visual inspection.

REASON FOR QUESTION

If defrost cable is binding or

damaged, the defrost

louver may not be

positioned correctly for AC

operations.