IK2200088 Service Bulletin/Repair Instructions

IK2200088 - Factory Installed Air Conditioning, EC4.0 System BE, CE, FE, RE Bus Mo...
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TOBAGO, UNITED STATES,

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SOUTH KOREA, PANAMA
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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

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Viewed:
10/19/2009
Brandon

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Author:
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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...
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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
https://evalue.internationaldelivers.com/service_kb/DocTool/ArticleViewer.aspx?ControlID... 6/1/2020
IK2200088 - Factory Installed Air Conditioning, EC4.0 System BE, CE, FE, RE Bus Mo...
Page 5 of 5
• System Performance

• Electrical Diagrams

Please refer to Valeo website for support on compressors

http://www.valeocompressors.com/

Related iKNow Articles
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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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