HVACopediaKeepRite · Air conditioner
Green COMM LED on Communication with the system established
What the display is showing
The green COMM light on the outdoor board is lit steadily once a valid command has arrived from the other communicating products. It goes dark again if nothing valid is received for 2 minutes and returns with the next valid message.
Applies to: C4A3/CXA6 A-C (communicating control)
Settings for these units
Outdoor unit clearances · KeepRite C4A3/CXA6 AC
| Location | Minimum |
|---|---|
| Service end | 24 in. (610 mm) |
| Above unit | 48 in. (1219 mm) |
| One side | 6 in. (152 mm) |
| Other sides | 12 in. (305 mm) |
| Between units | 24 in. (610 mm); 18 in. (457 mm) with no overhang within 12 ft |
| Roof mount height above roof | 6 in. (152 mm) |
| Shrubs/fences from coil | 18 in. (457 mm) |
Keep roof run-off and snow from falling on the unit.
Unit must be level within 2 degrees.
Models that show this code
2 models in KeepRite C4A3/CXA6 AC
Other codes on the same units
- 84 High pressure lockout
- Amber 1 flash Running - cooling / low stage (normal)
- Amber LED off Standby - no call (2-wire hookup or indoor unit unpowered)
- Amber LED on solid Standby - no call (communicating)
- Green COMM LED off No communication yet
- Green POWER LED Comfort Alert module has power
- Red TRIP LED Comfort Alert TRIP - Y call but compressor not running
- TRIP + ALERT flashing together Comfort Alert - control voltage too low to operate
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Source: KeepRite ICP C4A3/H4A3/T4A3/CXA6 A-C Installation Instructions 421 01 5103 05, Communication and Status Function Lights, p.17. Summarized in our own words; check the original manual for your model.
For licensed technicians. Gas, electrical and refrigerant work must be done by a qualified, licensed person. Shut off power and gas before servicing, never bypass a safety control, and follow the manufacturer’s manual for the exact model; it and local codes always take priority. HVACopedia is not affiliated with any manufacturer; brand and model names only identify the equipment.