Carrier 38TDB Guía para resolver problemas descargar pdf (Pagina 6)

Software Revs 3,5,6,8,10, 12 Infinity /Evolution Troubleshooting (Rev. 2)

10-12-2006

Intermittent loss of communication

If communication errors occur at random intervals, and no system problems can be

found by using the troubleshooting method described above, there may be a problem

with outside electrical noise that affects system communication. First, trace all wires

and ensure they are not in close proximity to high voltage, or other electrical equipment

wiring such as alarm systems, fluorescent lighting, or recording equipment. Ensure

there is sufficient separation between these wires, and a good common connection all

the way through.

If this does not correct the situation, properly installing shielded thermostat wire may be

required to stop external interference from affecting system communications.

Situation: Non-Zoned system over-conditioning or under-conditioning

Options:

• Evaluate User Interface location. Make sure nothing is influencing

temperature reading such as heat from direct sunlight. Make sure hole in

wall behind User Interface is plugged.

• If the system is over-conditioning, increase the anticipator setting. This

adjustment is located in the Thermostat Setup, Cycles per Hour screen

• If the system is under-conditioning, lower the anticipator setting and if

necessary, increase the cycles per hour. This adjustment is located in the

Thermostat Setup, Cycles per Hour screen

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Carrier 38TDB Guía para resolver problemas Pagina 6