CHAPTER 5 DIRECT SUPPORT MAINTENANCE INSTRUCTIONS

Table 5-1. Troubleshooting - TM-9-4520-260-130086

TM-9-4520-260-13 Heater Space Diesel With Blower 15 000 BTU/HR 28VDC (Model UH48-E Type IV) (NSN 4520-01-368-9594) Manual Page Navigation
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TM 9-4520-260-13

CHAPTER 5

DIRECT SUPPORT MAINTENANCE INSTRUCTIONS

Section/Paragraph

Page

Section I

Direct Support Troubleshooting ..........................................................................

5-1

Troubleshooting................................ ................................ ................................ ...

5-1

Section Il

Direct Support Maintenance Procedures ................................ .............................

5-5

5-2

Introduction................................ ................................ ................................ ..........

5-5

5-3

Carburetor ................................ ................................ ................................ ...........

5-6

5-4

Electronic control unit (ECU) ................................ ................................ ...............

5-10

5-5

Burner assembly................................ ................................ ................................ ..

5-12

5-6

Blower/motor/vent assembly ................................ ................................ ...............

5-14

5-7

Heat exchanger ................................ ................................ ................................ ..

5-19

5-8

Heater case ................................ ................................ ................................ ........

5-22

SECTION I. DIRECT SUPPORT TROUBLESHOOTING

5-4. TROUBLESHOOTING.

This troubleshooting procedure allows Direct Support Maintenance personnel to isolate and remedy equipment faults and

return the equipment to an operational status. See Table 5-1.

The heater ignition system contains dangerous voltages which can cause severe

electrical shock. Be extremely careful when troubleshooting while heater is connected to

power source. Always disconnect power when making continuity checks.

MALFUNCTION INDEX

Page No.

HEATER

Fails to start - no flame, no blower ..................................................... .......... .

5-2

Fails to start - blower runs for a short time then stops ......................... ... .......

5-3

Smokes or backfires ...................................................... ...............................

5-4

Cycles ON-OFF excessively ...................................................... ...................

5-4

5-1

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