Order this information in Print

Order this information on CD-ROM

Download in PDF Format

     

Click here to make tpub.com your Home Page

Page Title: Section V TROUBLESHOOTING
Back | Up | Next

Click here for a printable version

Google


Web
www.tpub.com

Home


   
Information Categories
.... Administration
Advancement
Aerographer
Automotive
Aviation
Combat
Construction
Diving
Draftsman
Engineering
Electronics
Food and Cooking
Math
Medical
Music
Nuclear Fundamentals
Photography
Religion
USMC
   
Products
  Educational CD-ROM's
Printed Manuals
Downloadable Books
   

 

TM 5-4120-287-15 Section V  TROUBLESHOOTING 3-12.   General This   section   provides   information   useful   in   diagnosing   and   correcting   unsatisfactory   operation   or   failure   of   the   air conditioner and its conditioner and its components.  Each trouble symptom stated is followed by a list of probable causes. The  possible  remedy  recommended  is  described  opposite  the  probable  causes.    Any  trouble  beyond  the  scope  of organizational maintenance shall be reported to direct support maintenance. 3-13.   Air Conditioner Fails to Start No operation in any control position. Probable cause Possible remedy Interrupted power supply Check line side of power cable.  If not reading, check main power supply. Main power cable not properly secured, or Check power input cable and check (J101 and P101) for cable damaged. Continuity and positive connection. Fuse Blown Replace fuse (para 309). Power supply our of phase. Correct phasing of power supply (para 2-4a(6)). 3-14.  Insufficient Cooling Air conditioner operating with air conditioning switch in COOL position. Probable cause Possible remedy Remote control box temperature control Move variable resistor further down the scale toward COOL variable resistor set above ambient position . Condenser assembly, or inlet filter obstructing air flow Check condenser section filter clean indicator; service condenser assembly and inlet filter as required (para 3-33, and 3-35). Evaporator air inlet filter obstructing air flow Check evaporator filter clean indicator; service evaporator assembly and inlet filter as required (para 3-32 and 3-34). Low refrigerant-12 charge. Check refrigerant liquid sight indicator; notify direct support maintenance if flow  through indicator appears milky or contains bubbles (para 2-9c(1). Compressor and/or condenser drive motors shut down Allow a few minutes for motor windings to cool down; then press system reset switch. Condenser or evaporator fan motors shut down Internal motor overload relay tripped.  Motor will start up auto- matically when cooled.  Notify direct support maintenance if motor does not restart in a few minutes. Defective thermostat Replace thermostat (para 3-39) Defective remote control Replace remote control box assemble and/or wiring harness. 3-15.  Air conditioning stops Probable cause Possible remedy Power failure Inspect power source cable for defects or external power source for proper operation. Fuse blown Replace fuse (para 3-9) Master circuit breaker tripped Set master circuit breaker to OFF position; after a few minutes set to ON position. If air conditioner does not start notify direct support maintenance. Trip relay K101 energized. Press system reset switch. 3-16.  Compressor Noisy Probable cause Possible remedy Insufficient oil or refrigerant supply, or Notify direct support maintenance. defective compressor. 3-17.  Compressor Stops Probable cause Possible remedy Condenser or condenser air inlet filter dirty. Check condenser section filter clean indicator; service or replace filter and clean condenser and sub-cooler assembly as required (para 3-33). Air in refrigerant system Check refrigerant liquid sight indicator; if refrigerant flow appears milky or contains bubbles notify direct support maintenance. 3-10

Privacy Statement - Press Release - Copyright Information. - Contact Us - Support Integrated Publishing

Integrated Publishing, Inc. - A (SDVOSB) Service Disabled Veteran Owned Small Business