R - C 21
Reference Materials
0.5 hp = 131 sw ver
1 hp = 132 sw ver
0.75 hp = 132 sw ver
Re-flashed Air Handler Motor
• 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
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
- 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
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