Carrier 58MVP instruction manual Index for Fault Code

Page 32

Fault Code 44

BLOWER CALIBRATION FAULT-This fault indicates that calculated blower motor speed is below 250 or above 1300 RPM. When Fault Code 44 occurs in HEATING, COOLING, or CONTINUOUS FAN mode, unit operates as shown below. Keep in mind that whenever furnace control board shuts unit down in heating mode, gas shuts off immediately, inducer continues running for 15 sec, and blower runs at default (or previous) speed control signal for selected off delay.

·HEATINGÐDuring a call for heat, the desired low-heat and high-heat blower RPMs are calculated at the same time. If desired low-heat blower RPM is less than 250 or greater than 1300 RPM, furnace control board starts flashing Fault Code 44, shuts unit down, waits 2 minutes, stops flashing Fault Code 44, and restarts heating cycle. If this happens on 2 consecutive cycles, furnace control board locks out on Fault Code 12. During this sequence, it is possible for furnace control board to start flashing Fault Code 41 instead of Fault Code 44. This indicates that blower calibration failed and blower speed during off delay is out of range.

When unit is operating in low heat and furnace control board (date code 9505 or earlier) is flashing Fault Code 44, it indicates that desired high-heat blower RPM is greater than 1300 RPM, and unit remains running in low fire-mode for rest of heating cycle.

When unit is operating in high heat and furnace control board (date code 9506 or later) is flashing Fault Code 44, it indicates that desired high-heat blower RPM is greater than 1300 RPM, but furnace control board is running blower at default speed of 1200 RPM. Under this condition, the high-fire temperature rise could be outside rise range and can cause limit cycling to occur.

·COOLINGÐIf desired cooling blower RPM is less than 250 or greater than 1300 RPM, furnace control board starts flashing Fault Code 44 and runs at default (or previous) cooling speed control signal for rest of cooling cycle. During this sequence, it is possible for furnace control board to start flashing Fault Code 41 instead of Fault Code 44. This indicates that blower calibration failed and blower speed for cooling is also out of range.

·CONTINUOUS FANÐIf desired continuous fan blower RPM is less than 250 or greater than 1300 RPM, furnace control board will start flashing Fault Code 44 and run at default (or previous) continuous fan speed control signal for the rest of continuous fan cycle. During this sequence, it is possible for furnace control board to start flashing Fault Code 41 instead of Fault Code 44. When this happens, it indicates blower calibration failed and blower speed for continuous fan is also out of range.

STEP

ACTION

YES

NO

GO TO

1.

Turn power off, wait 30 sec, then restore power. Reset thermostat. Observe operation of furnace

 

 

 

through 1 heating cycle.

Ð

Ð

2

 

NOTE: Blower access panel must be in place.

 

 

 

2.

Does Fault Code 44 flash twice followed by Fault Code 41?

3

4

Ð

3.

Eventually furnace will lock out on Fault Code 12 given enough time. Go to page number indicated

Ð

Ð

INDEX

in Index for Fault Code 12.

 

 

 

 

4.

Does only Fault Code 44 occur?

8

5

Ð

5.

Does a different fault occur?

6

11

Ð

6.

Go to page number indicated in Index for fault code flashed.

Ð

Ð

INDEX

7.

Go to page number indicated in Index for CLEANUP AND START-UP INSTRUCTIONS.

Ð

Ð

INDEX

8.

Does unit operate in low fire while flashing Fault Code 44?

9

3

Ð

 

You have excessive restriction in air delivery system. Check filter(s) and ductwork. If problem still

 

 

 

9.

persists, replace furnace control board. Make sure replacement board has a date code of 9506 or

Ð

Ð

10

later. This new furnace control board will allow unit to run in high fire when necessary. See descrip-

 

 

 

 

 

tion of operation at start of Fault Code 44. If problem still persists, use Appendix E to evaluate.

 

 

 

10.

Fix problem.

Ð

Ð

7

11.

Turn power off, wait 30 sec, then restore power. Reset thermostat. Observe operation of furnace

 

 

 

through 1 cooling cycle.

Ð

Ð

12

 

NOTE: Blower access panel must be in place.

 

 

 

12.

Does Fault Code 44 occur?

13

14

Ð

13.

You have excessive restriction in air delivery system. Check filter(s) and ductwork. Furnace blower

 

 

 

will operate in cooling mode at default speed. Check outdoor unit suction pressure and verify

Ð

Ð

10

 

charge to determine if indoor airflow is sufficient. If not, refer to Appendix E to evaluate.

 

 

 

14.

Turn power off, wait 30 sec, then restore power. Reset thermostat. Observe operation of furnace

 

 

 

after it goes into high fire.

Ð

Ð

15

 

NOTE: Blower access panel must be in place.

 

 

 

15.

Does unit operate in high fire while flashing Fault Code 44?

16

7

Ð

16.

You have excessive restriction in air delivery system. Check filter(s) and ductwork. Furnace blower

 

 

 

will operate in high-fire speed at 1200 RPM. Check temperature rise of furnace and make sure unit

Ð

Ð

10

 

does not trip primary limit. If it does, refer to Appendix E to evaluate.

 

 

 

32

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Contents Troubleshooting Guide Example Start Here SectionÐCooling Mode ÐVariable Speed Furnace Control ÐWith DE Connection Lowed by the lowest number fault code. Example 13, 13 Service → ÐService Label/Fault Code Instructions Status Code ExampleStep Action YES GO to ÐAir Conditioning A/C Airflow Setup Switch Position LEDs 1, 2, 3, or 4 on Solid Solid means on continuously Step Action YES GO to Fault Code Motor MTR2 →44 Page Lowed by the lowest number fault code. Example 14, 14 Fault Code ÐContinuous Fan CF Airflow Setup Switch Position ÐTwo-Speed AC/HP Airflow Requirements CFMPage · LOW Heat Page →18 →40 Utes 14ÐIGNITION Lockout Ber indicated in Index for Fault Code →26 Turn power off Is inducer blower wheel okay? 55 ¬ Rpmrpm highlow ¬ →20 Index for Fault Code Cleanup and START-UP Instructions Control Center Board Layout and SchematicAppendix a Wiring Schematic Schematic DiagramPressure Check Diagram Appendix BAppendix C Isolation CircuitsQuick Motor Test Procedure Appendix D→33 →59 Appendix E Example AIR Delivery Curve ÐAir Delivery Curves Air Delivery Curve ÐAir Delivery CurveÐ100-20 Air Delivery CurveÐ120-20Static Pressure Reading Location Diagrams Basement Ð Upflow ApplicationUpflow Total Static Pressure Reading Locations Closet Ð Downflow ApplicationAttic Ð Horizontal Application Duct Static Check Sheet Appendix F Quick Reference InformationAppendix G Thermostat Staging AlgorithmVariable Speed Condensing Furnace Algorithm Service Training
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58MVP specifications

The Carrier 58MVP is a high-efficiency gas furnace designed for optimal performance and energy savings. This model represents Carrier's commitment to innovative engineering and advanced technology, making it a preferred choice for homeowners seeking reliable heating solutions.

One of the standout features of the 58MVP is its impressive Annual Fuel Utilization Efficiency (AFUE) rating, which can reach up to 96 percent. This high AFUE rating indicates that the furnace uses less energy to produce heat, leading to lower utility bills and a reduced carbon footprint. The furnace is equipped with a two-stage gas valve that allows it to operate on a low setting during mild weather, providing increased efficiency and comfort.

The 58MVP also features Carrier's Infinity Control system, an advanced programmable thermostat that enables homeowners to customize their heating preferences. This system allows for precise temperature control and scheduling, ensuring that the home remains at a comfortable temperature while minimizing energy consumption.

In addition to its efficiency, the 58MVP is designed with noise reduction technology, including a quiet operating blower and insulated cabinet. This reduces operational sound, allowing for a more peaceful home environment. The model's multi-speed blower motor enhances comfort by providing consistent airflow and further optimizing efficiency.

Durability is a key characteristic of the Carrier 58MVP. It has a stainless-steel heat exchanger that promotes longevity and performance. The furnace is also equipped with a galvanized steel cabinet featuring a powder-coated finish, which protects against rust and corrosion.

The 58MVP is compatible with Carrier's advanced air purification systems, optimizing indoor air quality while heating. With features designed for efficiency, comfort, and durability, the Carrier 58MVP is an exceptional choice for homeowners looking to enhance their heating systems. The combination of advanced technologies, such as the two-stage operation and Infinity Control, positions this furnace as a leader in the market, meeting the needs of today's energy-conscious consumers. Ideal for both new constructions and retrofits, the Carrier 58MVP continues to set the standard for residential heating solutions.
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