CTV Sva05a En603servicealert
CTV Sva05a En603servicealert
CTV Sva05a En603servicealert
Order No: CTV-SVA05A-EN Date: June 23, 2003 This service alert contains preliminary information. An investigation is underway to verify the situation. If confirmed, we will issue a service bulletin with full details and any required corrective action. Regardless of the outcome, this service alert is cancelled 60 days from the issue date. To: District Managers District Service Managers Parts Center Managers Jerry Tripp, Jeff Rasor, and Charlie Lipke La Crosse, Pueblo and Aftermarket Technical Service
From:
Introduction
The purpose of this communication is to alert your organizations to a problem we have begun to investigate. It is a problem that has just recently appeared in the field but we want you to be prepared to watch for it. In addition, we will need your help to document any problems that do appear. Typical product applications involved in this alert include the Tracer CH530 chiller controller family of La Crosse and Pueblo chillers. This also includes the Aftermarket products like Earthwise purge and CH531 controls. The action discussed in this alert is related to chiller reliability. The CH530 DynaView/EasyView and Starter module are not included in this problem so this is a chiller reliability issue and not considered a safety concern.
Thus far our experience shows that microprocessors most often fail on initial power up of the controls within the first few hours with some failing in four days and possibly longer. Do not replace LLIDs that are functioning fine unless directed to do so by appropriate Technical Service group. The scope of this problem is still being defined.
Discussion
WARNING
Hazardous Voltage!
Disconnect all electric power, including remote disconnects before servicing. Follow proper lockout / tagout procedures to ensure the power can not be inadvertently energized. Failure to disconnect power before servicing could result in death or serious injury. The problem we are investigating relates to the potential component failure on some of the CH530 LLIDs. Two criteria must be met in order for a LLID to be considered suspect. First the LLID date code must be within the range shown in Table 1. If this is true then the microprocessor date code must have a date code of 0305. Note that there are a large quantity of microprocessors with a date code of 0305 that are perfectly okay. Again, both the LLID date code and the microprocessor date code must be looked at to determine if this is a suspect LLID.
Table 1 - LLIDs involved included in this action
TechView Trane Service # SEN00981 SEN01068 BRD02096 BRD02103 BRD02095 BRD02098 BRD02097 SEN00982 BRD02099 MOD01214 Min Date Code 1031100000 1031100002 1031300000 1031100000 1031200000 1031100000 1031100173 1031100000 1031100347 1031200001 Max Date Code 1031400483 1031200022 1031400263 1031300100 1031200209 1031300133 1031300488 1031500004 1031400461 1031300053
Part # on LLID X13650726-06 X13650910-02 X13650728-04 X13650729-03 X13650731-04 X13650733-05 X13650734-04 X13650796-03 X13650806-03 X13650902-01
Description Temperature Sensor, standard High Temperature Sensor Dual binary input Dual high voltage binary input Dual analog I/O Dual relay output Dual triac output Level sensor input (Pueblo) Quad relay output High power relay output
LLID Code Label (White Sticker) 0311-0314 0311-0312 0313-0314 0311-0313 0312-0312 0311-0313 0311-0313 0311-0315 0311-0314 0312-0313
Those parts not affected include: DynaView/EasyView, Starter, pressure transducers, Rockwell/Trane AFD communications card, Triple winding temperature input, Dual Inverter Interface, Comm3, Comm 4, Comm 5, Inlet Guide Vane Actuator, and power supply. Expansion valves remain under investigation.
CTV-SVA05A-EN
SYMPTOMS
Loss of communication with a specific LLID Loss of communication to most or all LLIDs.(where the failed LLID is pulling down the entire communication bus) Service LED went on with magnet, but did not stay on when removed magnet Bound okay, but then lost binding. May or may not rebind. If rebound, possible loss of binding at a future time Service LED or output goes on and off on its own. A power cycle seems to make the failure go away for a while. It most likely will fail again with time. Could be a non-recoverable failure at some time. Corrupted memory data like a hardware part number or LLID date code with all zeros or random data (as viewed with TechView).
Thus far our experience shows that the microprocessor most often fails on initial startup of the controls, typically within the first few hours after power application. If you experience these symptoms follow the troubleshooting procedures below.
CTV-SVA05A-EN
Determine date code of suspected LLID. (Example here is 0214: 02 = 2002 14 = 14th week)
CTV-SVA05A-EN
LLIDs with red status in binding view are not communicating and need to be checked for proper IPC buss connections and replaced as necessary.
Figure 4 - Frame mounted LLID; Temperature sensor example with back side label shown.
Figure 5 - Frame mounted Label detail. Date code of suspected LLID is 0311 to 0314. (Example here is 0020: 00 = 2000 20 = 20th week) Look for 0311 to 0314 in the same position.
Units Affected
Parts, CVRD, and PRGD RTAC CVHE, CVHF , CVHG, CVGF , CDHG, CDHF 2003 CH531 U03C09344 through U03F00742 L03C03323 through most L03F xxxxx serial numbers. Approx. June 20th
ACTION
Do not replace LLIDs that are functioning fine unless specifically directed to do so by the respective Technial Service group. The scope of the suspect LLIDs is still under investigation. Be aware of this potential problem and know how to recognize date codes involved and parts involved so you dont over-react. Check local parts stock to be sure it is outside of the date codes involved. Notify Product Technical support when symptoms occur by filling out the attached form and notifying (send to) respective technical support team listed. In cases where this problem is confirmed, ask Product Technical Support for further instructions. At this time we are still investigating and your data is going to help us determine the appropriate action.
CTV-SVA05A-EN
Return defective parts via Falcon claim handling system. Always use new IPC Bus connector when replacing frame monted LLIDs.
LIDD Failure Information request Chiller Serial Number: LLID Name and Type: Chiller Start date: LLID Fail Date: Approx. Hours powered up: Chiller run hours: LLID Date Code (white sticker) i.e. 0311-0315: LLID Date Code obtained with TechView i.e. 1031100109: LLID Microprocessor Date Code (0305): LLID serial number found on yellow sticker under bar code: Symptoms: (see page 3)
Questions
Contact the Product Technical Service department in La Crosse, Pueblo or Global Aftermarket with questions regarding this Service Alert. Product Models
Parts, CVRD, and PRGD
RTAC
For more information contact your local district office or e-mail us at comfort@trane.com
Trane has a policy of continuous product data and product improvement and reserves the right to change design and specifications without notice. Only qualified technicians should perform the installation and servicing of equipment referred to in this bulletin.