Carrier 58MVP Troubleshooting Manual page 42

Variable-speed 2-stage electronic condensing furnace

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Furnace:

Model Number

Serial Number

Position? U/F D/F H/R H/L

Outdoor Unit:

Model Number

Serial Number

What type of media filter is being used?

What is static pressure drop across filter?

Does fault code go away when you remove filter?

What Zone System is applied?

What Zone has highest total ESP?

Is a Zone Bypass Damper being used?

What type of Bypass Humidifier is being used?

Is Bypass Humidifier setup switch on or off?

If you have a Fault Code 41 and/or 44, do the following:

1. Turn power off to furnace and outdoor unit.

2. Set A/C setup switch for 2 tons (800 CFM).

3. Turn only power to furnace back on.

4. Set thermostat for a call for cooling.

5. Check supply and return ESP as in Appendix E. Add these 2 ESP readings together for Total ESP. Repeat these steps until a fault code

flashes on the microprocessor. Log your information on this sheet.

• At Low Heat:

Supply ESP

Return ESP

Any Fault Code Flashing? If so what number?

• At High Heat:

Supply ESP

Return ESP

Any Fault Code Flashing? If so what number?

• At 2 Ton A/C Setting:

Supply ESP

Return ESP

Any Fault Code Flashing? If so what number?

• At 2.5 Ton A/C Setting:

Supply ESP

Return ESP

Any Fault Code Flashing? If so what number?

• At 3 Ton A/C Setting:

Supply ESP

Return ESP

Any Fault Code Flashing? If so what number?

• At 3.5 Ton A/C Setting:

Supply ESP

Return ESP

Any Fault Code Flashing? If so what number?

• At 4 Ton A/C Setting:

Supply ESP

Return ESP

Any Fault Code Flashing? If so what number?

• At 5 Ton A/C Setting:

Supply ESP

Return ESP

Any Fault Code Flashing? If so what number?

Duct Static Check Sheet

At what CFM?

and is it operating (opening)