Carrier 58MVP instruction manual Appendix D, Quick Motor Test Procedure

Page 37

Appendix D

Quick Motor Test Procedure

In an effort to provide a method of troubleshooting inducer and blower motor by themselves, the following procedure may save you some time in the event any of the following fault codes are the reason for service call (12, 32, 41, 42, or 44). If you get any other fault code, you should use main troubleshooting guide to isolate problem.

STEP

 

ACTION

YES

NO

GO TO

1.

Turn power off, remove blower access panel, and disconnect R thermostat lead.

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2

2.

Turn power on and depress door switch. Use a piece of tape to hold switch closed.

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3

3.

Put setup switch SW-6 for COMPONENT TEST in ON position.

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4

4.

After COMPONENT TEST is completed, does Fault Code 11 flash?

5

8

Ð

5.

Turn power off, put setup switch SW-6 for COMPONENT TEST in OFF position, and reconnect R

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Ð

6

thermostat lead to furnace control board.

 

 

 

 

6.

Replace blower access panel and turn power on. Wait a few sec, then reset thermostat. Observe

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7

operation of furnace through 1 heating cycle.

 

 

 

 

7.

Go to page number indicated in Index for START HERE section.

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INDEX

8.

Does Fault Code 42 flash?

9

27

Ð

9.

Does inducer motor MTR1 turn on and come up to speed?

24

10

Ð

10.

Does inducer wheel rub against inducer housing?

16

11

Ð

11.

Does inducer wheel turn freely?

12

19

Ð

12.

Do you have 120v between I1 and I2 on furnace control board?

13

16

Ð

13.

Do you have 120v between terminals PL7-6 and PL7-12?

15

14

Ð

14.

You have an open wire or bad terminal on either the BLACK or WHITE wire between furnace con-

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16

trol board and inducer motor MTR1.

 

 

 

 

15.

Are all pins and wire leads intact on connectors between furnace control board and inducer motor?

18

16

Ð

16.

Fix problem.

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17

17.

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

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INDEX

 

Check Inducer PW line. To do this, connect a DC voltmeter across terminals PL7-2 BROWN (+)

 

 

 

 

and PL7-10 YELLOW (-) on inducer motor. Repeat COMPONENT TEST by turning setup switch

 

 

 

18.

SW-6 OFF and then back ON. Does voltage across PL7-2 and PL7-10 change between states as

 

 

 

shown below?

19

20

Ð

 

·

State 1ÐOFF (-0.1 Ð 0.1 vdc)

 

 

 

 

·

State 2ÐLOW (2.0 Ð 3.0 vdc)

 

 

 

 

·

State 3ÐHIGH (7.0 Ð 8.0 vdc)

 

 

 

 

 

 

 

 

19.

Replace inducer motor or inducer motor assembly. Inspect electronics portion of failed motor for

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17

water damage. If present, find source of water and fix. Check A-coil and/or humidifier.

 

 

 

 

 

 

 

 

 

 

Disconnect PL7 from inducer motor and connect a DC voltmeter across terminals PL7-2 BROWN

 

 

 

 

(+) and PL7-10 YELLOW (-). Repeat COMPONENT TEST by turning setup switch SW-6 OFF and

 

 

 

20.

then back ON. Does voltage across PL7-2 and PL7-10 change between states as shown below?

19

21

Ð

·

State 1ÐOFF (-0.1 Ð 0.1 vdc)

 

 

 

 

 

·

State 2ÐLOW (6.0 Ð 7.0 vdc)

 

 

 

 

·

State 3ÐHIGH (10.5 Ð 11.5 vdc)

 

 

 

 

 

 

 

 

 

Connect a DC voltmeter across terminals PL1-6 BROWN (+) and PL1-4 YELLOW (-) on furnace

 

 

 

 

control board. Repeat COMPONENT TEST by turning setup switch SW-6 OFF and then back ON.

 

 

 

21.

Does voltage across PL1-6 and PL1-4 change between states as shown below?

23

22

Ð

·

State 1ÐOFF (-0.1 Ð 0.1 vdc)

 

 

 

 

 

·

State 2ÐLOW (6.0 Ð 7.0 vdc)

 

 

 

 

·

State 3ÐHIGH (10.5 Ð 11.5 vdc)

 

 

 

22.

Replace furnace control board.

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17

23.

You have an open wire or bad terminal on either the BROWN or YELLOW wire between connectors

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17

PL1 and PL7. Repair it or replace main harness.

 

 

 

 

 

Check RPM feedback line. To do this, connect a DC voltmeter across terminals PL7-2 BROWN (+)

 

 

 

 

and PL7-1 ORANGE (-) on inducer motor. Repeat COMPONENT TEST by turning setup switch

 

 

 

24.

SW-6 OFF and then back ON. Does voltage across BROWN and ORANGE wires change between

 

 

 

states as shown below?

25

19

Ð

 

·

State 1ÐOFF (11.5 Ð 12.5 vdc)

 

 

 

 

· State 2ÐLOW (10.2 Ð 11.2 vdc)

 

 

 

 

·

State 3ÐHIGH (8.4 Ð 9.4 vdc)

 

 

 

 

Connect a DC voltmeter across terminals PL1-6 BROWN (+) and PL1-5 ORANGE (-) on furnace

 

 

 

 

control board. Repeat COMPONENT TEST by turning setup switch SW-6 OFF and then back ON.

 

 

 

25.

Does voltage across BROWN and ORANGE wires change between states as shown below?

22

26

Ð

·

State 1ÐOFF (11.5 Ð 12.5 vdc)

 

 

 

 

 

· State 2ÐLOW (10.2 Ð 11.2 vdc)

 

 

 

 

·

State 3ÐHIGH (8.4 Ð 9.4 vdc)

 

 

 

26.

You have an open wire or bad terminal on ORANGE wire between connectors PL1 and PL7. Repair

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17

it or replace main harness.

 

 

 

 

27.

Does Fault Code 41 flash?

28

7

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28.

Does blower motor MTR2 turn on and come up to speed?

48

29

Ð

 

 

 

 

 

29.

Remove tape from door switch and turn power off at main disconnect.

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30

 

 

 

 

 

 

37

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Contents Troubleshooting Guide Start Here Section ExampleÐCooling Mode ÐVariable Speed Furnace Control ÐWith DE Connection Lowed by the lowest number fault code. Example 13, 13 Service Status Code Example → ÐService Label/Fault Code InstructionsStep 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 ÐTwo-Speed AC/HP Airflow Requirements CFM ÐContinuous Fan CF Airflow Setup Switch PositionPage · 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 Appendix a Board Layout and SchematicControl Center Schematic Diagram Wiring SchematicAppendix B Pressure Check DiagramAppendix C Isolation CircuitsAppendix D Quick Motor Test Procedure→33 →59 Example AIR Delivery Curve Ð Appendix EAir Delivery Curve Ð Air Delivery CurvesAir Delivery CurveÐ100-20 Air Delivery CurveÐ120-20Basement Ð Upflow Application Static Pressure Reading Location DiagramsUpflow Total Static Pressure Reading Locations Closet Ð Downflow ApplicationAttic Ð Horizontal Application Duct Static Check Sheet Quick Reference Information Appendix FThermostat Staging Algorithm Appendix GVariable 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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