AirComm Corporation Airbus EC145 Cabin Air Conditioner Instructions for Continued Airworthiness User Manual

AIR CONDITIONER SERVICE MANUAL EC145-200M-1 
 
Revision 13  Page 35 
 
CHAPTER 6 
STANDARD PRACTICES INFORMATION (continued) 
 
10. REMOVAL, INSTALLATION/ REPLACEMENT OF BY-PASS VALVE ASSEMBLY. 
 
REMOVAL 
 
A. Access refrigerant plumbing to By-pass Valve. 
 
B.  It will be necessary to evacuate (discharge) the refrigerant from the system to remove or replace 
the by-pass valve. Instructions for servicing of the system are found in Chapter 5 Servicing. 
 
CAUTION 
Refrigerant servicing should be...

AIR CONDITIONER SERVICE MANUAL EC145-200M-1 
 
Revision 13  Page 36 
 
CHAPTER 6 
STANDARD PRACTICES INFORMATION (continued)   
 
11. REMOVAL, INSTALLATION / REPLACEMENT OF AFT EVAPORATOR BLOWER MOTOR 
 
REMOVAL 
 
CAUTION 
It is recommended that the battery and external power be disconnected before starting work. 
 
A.  Access to the aft evaporator blower assemblies requires the removal of the overhead ceiling 
panel in the main cabin area. 
 
B.  Remove the hardware that attaches the blower motor to...

AIR CONDITIONER SERVICE MANUAL EC145-200M-1 
 
Revision 13  Page 37 
 
CHAPTER 6 
STANDARD PRACTICES INFORMATION (continued) 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
THIS PAGE INTENTINALLY LEFT BLANK 
FOR FURTURE USE 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  

AIR CONDITIONER SERVICE MANUAL EC145-200M-1 
 
Revision 13  Page 38 
 
CHAPTER 7 
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....

AIR CONDITIONER SERVICE MANUAL EC145-200M-1 
 
Revision 13  Page 39 
 
 
CHAPTER 7 
TROUBLESHOOTING (continued) 
 
1. SYSTEM TROUBLESHOOTING (continued) 
 
Problem  Probable Cause  Solution 
System not cooling 
(Evaporator blowers not 
operating) 
j.  Forward and aft evaporator 
blower motor(s)   
 
     
j.  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, as 
shown in chapter 6. ¹ 
Loss of cooling...

AIR CONDITIONER SERVICE MANUAL EC145-200M-1 
 
Revision 13  Page 40 
 
 
CHAPTER 7 
TROUBLESHOOTING (continued) 
 
Figure 7-1 General Arrangement – Air Conditioning System Installation. 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  

AIR CONDITIONER SERVICE MANUAL EC145-200M-1 
 
Revision 13  Page 41 
 
 
CHAPTER 7 
TROUBLESHOOTING (continued) 
 
Figure 7-2 Air Conditioning System Electrical Schematic  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  

AIR CONDITIONER SERVICE MANUAL EC145-200M-1 
 
Revision 13  Page 42 
(S/N 001 Thru 005) 
 
CHAPTER 7 
TROUBLESHOOTING (continued) 
Figure 7-3 Air Conditioning System Electrical Schematic  
 
 
 
 
 
 
 
 
 
 
(Cut and paste drawing) 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  

AIR CONDITIONER SERVICE MANUAL EC145-200M-1 
 
Revision 13  Page 43 
(S/N 006 thru 014) 
 
CHAPTER 7 
TROUBLESHOOTING (continued) 
 
Figure 7-4 Refrigerant Plumbing Schematic  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  

AIR CONDITIONER SERVICE MANUAL EC145-200M-1 
 
Revision 13  Page 44 
 
CHAPTER 7 
TROUBLESHOOTING (continued) 
 
 
 
 
 
 
 
Cut and paste 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Electrical Schematic with 3rd Aft Evaporator Blower 
(S/N 015 and Subsequent)