Re-Flashed Air Handler Motor; Eev History - Cnt05129; Eev History - Trane ACONT900AC43UA Service Manual

• Corrective Action
- Personality Module change out
- Replacement PM programming at Tyler
facility
- Communication and shipments to
field (9/11/09)
- Refer to SSA-SVB07A-EN

Re-flashed Air Handler Motor

EEV History - CNT05129

• 20 SEER Product launch 12/15/08
• Heads Up #902 communication to field 4/22/09
- Performance issue with the EEV pumping
systems down
LPCO lockout on Heat Pumps

Err 79 on Comfort Control

7-flash Fault LED on OD control

- Contributors to trigger software issue
High superheat in 2nd stage

heating mode
- 4 & 5 ton models likely candidates
Other Issues - EEV Control
• 9-flash LED Fault code
- Low superheat in non-controlling
mode (A/C)
- Resolved with CNT05874
0.5 hp = 131 sw ver
1 hp = 132 sw ver
0.75 hp = 132 sw ver
Reference Materials
- Not a functional issue, not reported to
customer
• Close Valve Test
- If unit pumps down, LPCO will open
- System becomes locked-out
- Requires energizing the SOV to equalize
pressure
- Resolved with CNT05874
- New operating instructions – See
Service Facts

EEV History

• CNT05129 (old part)
• CNT05874 (new part)
• Interim factory reworked control boards
- Board will have one of three markings
"V1" hand written on the label

"V1" printed on the label (by

supplier)
"V1" hand written on the program

header
Same part numbers

D155280G02/CNT05129
• 4 & 5 ton unit serial numbers 9172****F
- April 21, 2009 have new software
• All units have new software starting 9181****F
- April 27, 2009 have new software
• Corrective Action for Field Installed Units
- Fix on Fail
- Verify symptoms fit date code range
- Replace control with CNT05874
- Report any other issues
R - C 21