Carrier 38TDB Guía para resolver problemas descargar pdf (Pagina 7)

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

10-12-2006

Situation: Clean or Replace Filter is displayed after a short period of time

These systems have a feature called TrueSense filter detection. This feature reads the change in

static pressure caused by the filter accumulating dirt. At 1:00 pm each day the system will take a

reading and record the change in static pressure. The clean or replace filter message will pop up

when the filter is full.

This feature operates by setting a base line static pressure based on the highest airflow the system

could run (this could be heat or cool airflow). The measurement is taken at a low airflow, and then

calculated up to the highest airflow the system could see. An enhancement to the (-A) model was

that if a furnace is used and it is locked in low fire, the calculation will use the higher of the cooling

airflow or low furnace heat airflow. In previous versions, it used the higher of high furnace airflow or

cooling airflow even if the furnace was locked in low fire.

In (-A) models (version 10 and 12 software), clean filter routine was changed to eliminate nuisance

pop up messages when a marginal duct system is used. When the initial static pressure is 0.7

inches or higher, a modified calculation is used to allow this feature to be used at higher static

pressures. With –A models, it will only pop up immediately if the initial static is 1.5 inches or higher.

This truly indicates a ductwork problem that must be addressed.

Options if this pops up quickly:

• Evaluate duct work and make improvements to lower static pressure where possible

• Change filter type to EAC. This will display the message based on time instead of static

pressure change

• Turn the filter reminder to off in the homeowner’s Advance Setup

Situation: ERV/ HRV Not Recognized By System

A ventilator may be connected to the system by wiring directly to a Damper Control Module (DCM) in a

zoned system, or an Network Interface Module (NIM) in a non-zoned system. The system recognizes a

ventilator is connected when the ventilator is wired to the YEL, RED, GRN, and BLU terminals of the NIM

or DCM, and the ventilator is powered.

If the ventilator is not found, check for 12 volts DC between Y (+12 vdc) and B (ground) terminals of the

ventilator. If voltage is not detected, the ventilator will not be found by the system. Make sure ventilator is

powered.

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Carrier 38TDB Guía para resolver problemas Pagina 7