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AirComm Corporation Bell 412 Air Conditioner Instructions for Continued Airworthiness User Manual
AirComm Corporation Bell 412 Air Conditioner Instructions for Continued Airworthiness User Manual
Here you can view all the pages of manual AirComm Corporation Bell 412 Air Conditioner Instructions for Continued Airworthiness User Manual. The AirComm Corporation manuals for Air Conditioner are available online for free. You can easily download all the documents as PDF.
Page 51
AIR CONDITIONER SERVICE MANUAL 412AC-208M Revision 14 Page 41 CHAPTER 8 TROUBLESHOOTING 1. SYSTEM TROUBLESHOOTING Prior to troubleshooting a defective system, it is advisable to conduct a visual inspection for general condition, and obvious signs of damage or failure. The following matrix lists the easiest checks, and the most likely problems. Problem Probable Cause Solution System not Cooling (Evaporator blowers still operating) a. System is low or empty of refrigerant. a....
Page 52
AIR CONDITIONER SERVICE MANUAL 412AC-208M
Revision 14 Page 42
(System troubleshooting continued)
Problem Probable Cause Solution
System not cooling
(Evaporator blowers not
operating)
i. Forward and aft evaporator
blower motor(s)
i. Check for power to the
motor(s), and for the free
movement of the blower
wheel. If the motor shaft
does not turn smoothly the
motor must be replaced. ¹
Loss of cooling limited to one
evaporator.
j. Expansion valve malfunction. j. If cooling is...
Page 53
AIR CONDITIONER SERVICE MANUAL 412AC-208M Revision 14 Page 43 Figure 13: REFRIGERANT PLUMBING SCHEMATIC
Page 54
AIR CONDITIONER SERVICE MANUAL 412AC-208M Revision 14 Page 44 (Refrigerant plumbing schematic continued) Figure 14: Refrigerant plumbing schematic (continued)
Page 55
AIR CONDITIONER SERVICE MANUAL 412AC-208M Revision 14 Page 45 Figure 15: 412AC-808 ELECTRICAL SCHEMATIC
Page 56
AIR CONDITIONER SERVICE MANUAL 412AC-208M Revision 14 Page 46 Figure 16: 412AC-808 electrical schematic (continued)
Page 57
AIR CONDITIONER SERVICE MANUAL 412AC-208M Revision 14 Page 47 APPENDIX A Weight and Balance Information Weight breakdown – Bell 412 Series Air Conditioner System: Ref. Dwg. 412AC-102-1 / -2 Item Wt. (lbs) ArmX (in) MX (in-lb.) Total (-1 or -2 installation) 174.90 104.4 18,260