NHTSA ID Number: 10175974
Manufacturer Communication Number: IK2200088
TSB/Document Date: 2020-06-02
Summary
Factory Installed Air Conditioning, EC4.0 System operating instructions and the service manual
IK2200088 - Factory Installed Air Conditioning, EC4.0 System BE, CE, FE, RE Bus Mo...
Countries:
BAHAMAS, BOLIVIA, BELIZE,
CANADA, CHILE, TAIWAN,
COLOMBIA, COSTA RICA,
DOMINICAN REPUBLIC, ECUADOR,
EL SALVADOR, TRINIDAD AND
TOBAGO, UNITED STATES,
URUGUAY, VENEZUELA, MEXICO,
ARUBA, NICARAGUA, PERU,
PUERTO RICO, Curaçao, GUAM,
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HONDURAS, JAMAICA, KOREA,
SOUTH KOREA, PANAMA
Page 1 of 5
Document
IK2200088
ID:
Availability: ISIS, Bus ISIS, FleetISIS, IsSIR
Revision: 10
Major
System:
BUS BODY
Created:
Current
Language:
English
Last
5/5/2020
Modified:
Other
Français, Español,
Languages:
Viewed:
10/19/2009
Brandon
Akridge
Author:
7014
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Title : Factory Installed Air Conditioning, EC4.0 System BE, CE, FE, RE Bus Models
Applies To : BE, CE, FE, RE Bus Models any Air Conditioning feature with the 4.0 in
description BE and CE only – 48ADC EC4.0
Change Log
Please refer to the change log text box below for recent changes to this article:
05/05/2020 ‐ Adding diagnostic info on compressor, updating Transair location, charging info distinction, addressing
feedback, updating feature codes
11/13/2018 ‐ Added 48CXE to feature list
08/02/2016 ‐ Corrected Formatting and Layout.
04/24/2015 ‐ Added link for system specs and capacity's per article feedback
Description
This article includes the operating instructions and the service manual for the Trans/Air EC4.0 air conditioning
system.
Units built with factory installed air conditioning will have an option code for the air conditioning system
installed in the components section in ISIS. (Sample shown below) Verify the operating system ordered on the
unit prior to utilizing the appropriate iKNow article for service information, note this article is for features with
4.0 in the description.
Sample Feature Codes
Description
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IK2200088 - Factory Installed Air Conditioning, EC4.0 System BE, CE, FE, RE Bus Mo...
Page 2 of 5
Feature
Code
0048USZ
AIR CONDITIONER, BODY IC Air, 96,000 BTU, Evaporator, Condenser & Compressor,
With Rear Flush Mounted Evaporator and EC2.5 Control System
0048AAS
AIR CONDITIONER, BODY IC Air, 120,000 BUT, Evaporator, Condenser & Comrpessor,
With EC3.0 Control System
0048CWK
AIR CONDITIONER, DASH IC Air, 40,000 BTU, Stand‐Alone Dash Air Evaporator, SMC2S
Condenser & Compressor, and EC4.0 Control System
0048ADC
AIR CONDITIONER, DASH IC Air, With Heat, Evaporator, with EC4.0 Control System, with
60K & 120K Body Systems
0048GTK
STAND‐ALONE AC DASH IC W/EC4.0 SYS IC Air, 40,000 BTU, Stand‐Alone Dash Air
Evaporator, Radiator Mounted Condenser & 10CID Compressor in Primary Drive
Location, EC4.0 Control System
Operating Instructions
BASIC OPERATION
With the vehicle running, press the MODE button to turn EC4.0 system on. The A/C indicator will light up
indicating system is in A/C mode. Fan speed indicator 1 will light up indicating the fan speed is Low. Thermostat
will also turn on automatically. LED display shows cabin air temperature.
Select mode of operation (Heat / Defog Optional)
Press the MODE button to change the operation mode between A/C, Defog or Heat.
Change fan speed
Press the FAN button to change the fan speed between Low, Medium, and High.
Change set point temperature
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IK2200088 - Factory Installed Air Conditioning, EC4.0 System BE, CE, FE, RE Bus Mo...
Page 3 of 5
The thermostat LCD display shows cabin air temperature during normal operation. Press UP or DOWN arrow
once for set point mode. The set point temperature and a flashing decimal point will be displayed on the LED in
set point mode. Press the UP or DOWN arrow again to adjust the set point to the desired value. After 5
seconds, EC4.0 will switch back to normal operating mode displaying cabin temperature. The new set point
then becomes effective.
The default set point temperature is 70°F. This setting is stored in EC4.0s non‐volatile memory. It takes effect
every time the system turns on. To change the default set point temperature setting, go into the setting mode
and adjust the set point to the desired value, then press the UP and DOWN arrow simultaneously. The new set
point value will be stored into the non‐volatile memory and become the default set point.
Turn system off
Press the MODE button until all the mode indicators turn off. The fan speed indicators and the thermostat LCD
display will turn off consequently.
Fan Only mode operation
Press the FAN button while the EC4.0 system is off. The A/C system will be running in Fan Only mode. (Only
evaporator blowers run, compressor and condenser remain off.) Press the FAN button to set the fan to desired
speed (Low, Medium or High). In Fan Only mode, the thermostat LCD still shows the cabin air temperature. To
turn Fan Only mode off, keep pressing the FAN button until all the fan speed indicators turn off.
Troubleshooting
Fault Code
Description
HP
High pressure fault
LP
Low pressure fault
Lu
Low clutch voltage/blown fuse
Sr
Maintenance required
System Indicator
Hi
Return air temperature above 90°F
Lo
Return air temperature below 60°F
Sr
1500 Hr Service Reminder
No service required when the thermostat LCD shows “Hi” or “Lo”.
Turn the system off and then turn it back on to reset the “Sr” code. Service is required if “Sr” code cannot be
reset.
Compressor
For issues such as those listed below, see exact details on the Valeo website (http://www.valeocompressors.com/)
and look at their troubleshooting section
• oil contamination (change in color, metal filings, ect.)
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IK2200088 - Factory Installed Air Conditioning, EC4.0 System BE, CE, FE, RE Bus Mo...
•
•
•
•
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leaking
not cooling
noise
smoke
Valeo website also contains service procedures for the magnetic clutch, cylinder heads, seals, ect..
If replacing the compressor, the discharge line must be flushed with non‐solvent based flushing agents. Also,
the Filter Drier must be replaced.
Service Manuals
EC4.0 Sercive Manual
Click here for the charging system specs and capacity's
Note: The charging system info located on the electrical access door for each bus, as shown below, does not
contain the amount of oil that was originally contained in the compressor/s, so when replacing the lubricant
take that into consideration calculating total lubricant required. Check the label on the compressor for its
lubricant info.
Technical Support
Trans/Air Manufacturing Website (800) 673‐2446
Please refer to the Trans/Air website for the following:
• Manuals
• Maintenance & Troubleshooting, see below for location
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IK2200088 - Factory Installed Air Conditioning, EC4.0 System BE, CE, FE, RE Bus Mo...
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• System Performance
• Electrical Diagrams
Please refer to Valeo website for support on compressors
http://www.valeocompressors.com/
Related iKNow Articles
IK2200001
BUS BODY
Bus Air Conditioning Service Contacts for HVAC Information
IK2200090
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Factory Installed Air Conditioning, EC3.0 System
IK2200089
BUS BODY
Factory Installed Air Conditioning, EC2.5 System
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Copyright © 2020 Navistar
, Inc.
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TSB/Document ID: IK2200088
Replacement Service Bulletin Number:
MFR Communication Date: 2020-05-05
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL
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