Quantcast COMPRESSOR (Continued) - 506780271 4120-01-069-1321)">

 

Click here to make tpub.com your Home Page

Page Title: COMPRESSOR (Continued)
Back | Up | Next

Click here for thousands of PDF manuals

Google


Web
www.tpub.com

Home


   
Information Categories
.... Administration
Advancement
Aerographer
Automotive
Aviation
Construction
Diving
Draftsman
Engineering
Electronics
Food and Cooking
Logistics
Math
Medical
Music
Nuclear Fundamentals
Photography
Religion
   
   

 

Share on Google+Share on FacebookShare on LinkedInShare on TwitterShare on DiggShare on Stumble Upon
Back
COMPRESSOR - 506780270
Up
TM-5-4120-359-14 Air Conditioner Split Package 18 000 BTU/HR Cooling 30 000 BTU/HR Heating 208 Volt 3 Phase 400 Hertz Manual
Next
Figure 4-91. Compressor (DHF model)
TM 5-4120-359-14
WARNING
Do not touch heating element.
(4) Carefully feel lower part of compressor.
If air conditioner has been connected to power supply for at least four hours, compressor should feel
warm (100 to 120F). If not warm, test crankcase heater for continuity.
If air conditioner has not been connected to power supply for at least four hours, compressor should be at
ambient temperature.
(5) Using multimeter, test crankcase heater, and thermostat circuit at J10 connector:
Using multimeter, test resistance from pin F to pin G. Resistance should be 950 to 1430 ohms. Lower
reading indicates short, and infinite reading indicates an open.
(6) Using multimeter, test crankcase heater, and thermostat at junction box:
Remove compressor junction box cover.
Open connection between thermostat lead and heater lead.
Check heater continuity between open connection and J10-F. If open, heater should be replaced.
Check thermostat continuity between open connection and J10-G.
If open, thermostat should be
replaced.
(7) Using multimeter, test compressor motor windings
Check continuity between pins A, B, and C and the compressor body. No continuity should exist. If
continuity exists, the compressor is bad.
Test 3 phase windings at J10:
A to B
B to C
A to C
All resistances should be above zero and less than 2 ohms.
Test resistance between pin D and pin E Resistance should be zero indicating thermostatic switch is
closed.
Compressor containing shorted, open or grounded winding or open thermostatic switch, should be
replaced.
If compressor windings are bad, check for compressor burn out prior to installing a new compressor.
(See instructions in compressor removal.)
b. Repair. The compressor and motor assembly are hermetically sealed in a metal canister and cannot be repaired.
The crankcase heater element, and related parts, and the electrical connector are attached to the canister externally and
may be replaced without opening the refrigeration pressure system.
4-179

Privacy Statement - Press Release - Copyright Information. - Contact Us

Integrated Publishing, Inc.