Trane TCONT900AC43UA - Airflow (Lower than Expected)

R - C 20
Reference Materials
• Service Bulletin SSA-SVB09A-EN issued
11/9/2009
• Global Parts building a supply of CNT06039
• For product applied in 24v, process replacement
control under warranty until bulletin instructions are
published (9214****V to 9434****V only)
• Units with CNT04962 DO NOT need to be
retrofitted
• Service Bulletin SSA-SVB09A-EN issued 11/9/
2009
• Product date range (9214****V to 9434****V only)
• Units with CNT04962 DO NOT need to be
retrofitted
• 2/26/2010 Revised SSA-SVB09A-EN
- Stop using CNT06039 for 24 volt control
issue
- Start using CNT04962 to resolve issue
- CR36 under development to resolve 24 volt
control mode BLW COM ERR issue
• May 2010 – CR36 approved for production
- Resolves Blower Com Err in 24 volt mode
(Really)
• CNT06352 in production
- Start date 10231****V
• Use CNT06352 for all future repair needs
• May 20, 2010 Revised SSA-SVB09A-EN
- Air Handlers used in 24 VAC control mode
- Serial date code range 8371****V until
10231****V
• Units with CNT04962 DO NOT need to be
retrofitted
• Units with CNT06039 DO NOT need to be
retrofitted when applied in Communicating Mode
• Parts disposition
- Southaven
Stock up with CNT06352
Purge all stock of CNT06039
(Complete with NLA notes)
Use up all stock of CNT04962
- Local inventories
Use up CNT06039 for
Communicating Mode applications
Use up CNT04962 for 24 VAC
Mode applications
Future orders, use
CNT06352 only
Purge all stock of CNT05173 and
CNT05870
Airflow (Lower Than Expected)
• Affected date codes range 9195 – 9255
- Coincided with Vidalia conversion to 16x
motor software
MOT13225
MOT13226
MOT13227
- 4 coefficient PM installed in all air handlers
- 4 coefficient combined with 16x software
results in low airflow
- Date codes prior to 9195 have rated airflow
- Date codes 9256 & later have rated airflow
Reverted to 13x software,
reflashed at factory
Labeled
- MOT13225
- MOT13226
- MOT13227
- Software label 13x