INTEGRATED FURNACE

 

TROUBLESHOOTING

CONTROL MODULE

 

GUIDE

 

 

 

 

 

 

 

 

 

 

CHART 3

3A3F

Inducer Draft Motor

Call for heat.

and

Thermostat

Pressure Switch

contacts

Check

R & W close.

 

 

 

Is induced

YES

 

draft motor

 

 

 

energized?

 

 

NO

 

 

3B

 

NO

Is diagnostic

 

LED flashing 2

 

 

 

 

times?

 

3C YES

Disconnect

electric power

at fuse or

circuit breaker.

3D

Test for

continuity across pressure switch.

Is diagnostic

LED flashing 3

times?

YES

3G

Jumper

pressure

switch.

3H

Does ignitor

glow?

3I YES

Place incline manometer in series with pressure switch tubing.

NO

NO

Check inducer

wiring. If OK,

repair or replace

inducer motor.

Check operation.

Replace pressure switch. Energize system. Check operation.

 

3E

 

3J

 

 

 

 

 

Is

NO

 

Is pressure

 

pressure

 

 

greater than

 

switch welded

 

 

pressure switch

 

 

closed?

 

 

 

specs?

 

 

 

 

 

 

YES

3K

NO

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Remove vent

 

 

 

 

connector

 

 

 

from furnace

 

 

 

 

flue collar.

 

 

 

 

 

YES

Replace pressure

switch. Check

 

 

operation.

TECHNICAL HELP

!WARNING

If diagnostic indicator (LED)

shows continuous flashing, turn off gas supply at source before disconnecting electrical power!

3L

Is

 

Correct blocked

pressure

YES

or incorrectly

greater than

 

installed vent.

pressure switch

 

 

Check operation.

specs?

 

 

 

NO

Repair leaks in

inducer assembly or

replace induced

draft motor. Check

operation.

262

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Emerson 50A55 manual 3A3F, 3C YES, 3I YES

50A55 specifications

The Emerson 50A55 is an advanced digital thermostat designed to enhance home comfort with energy-efficient climate control. This state-of-the-art device combines modern technology with user-friendly features, making it an ideal solution for both residential and commercial applications.

One of the main features of the Emerson 50A55 is its versatile programming capability. The thermostat supports a 5-2 day programming structure, allowing users to customize their heating and cooling schedules to fit their lifestyle. Users can set different temperatures for weekdays and weekends, ensuring that energy is not wasted when homes are unoccupied.

Another prominent characteristic of the Emerson 50A55 is its intuitive touch-screen interface. The large, easy-to-read display allows users to navigate through settings seamlessly. The interface includes large buttons and clear icons, enhancing the overall user experience. Additionally, backlighting ensures visibility in low-light conditions, making adjustments easy at any time.

The Emerson 50A55 is equipped with advanced technologies such as Smart Setback, which automatically adjusts the temperature according to preset schedules. This feature helps optimize energy usage while maintaining comfort levels. The thermostat also includes a smart recovery technology that learns how long it takes to reach set temperatures, ensuring that the desired climate is achieved by the scheduled time.

Compatibility is another significant advantage of the Emerson 50A55. It works with a variety of heating and cooling systems, including conventional systems, heat pumps, and multi-stage units. This flexibility makes it a valuable addition to any home or building.

Energy efficiency is at the forefront of the Emerson 50A55, featuring Energy Star certification. This certification indicates that the thermostat meets strict energy efficiency guidelines, ultimately aiding homeowners in reducing their energy bills.

Additionally, the Emerson 50A55 includes an easy-to-read indicator for filter replacement, which reminds users when it's time to change their HVAC filters. This feature not only promotes better indoor air quality but also prolongs the lifecycle of the HVAC system.

In conclusion, the Emerson 50A55 digital thermostat is a comprehensive solution for those looking to improve their home heating and cooling efficiency. With its programmable features, user-friendly interface, and energy-saving technologies, it delivers both convenience and performance. This makes it an excellent investment for anyone aimed at achieving a comfortable indoor environment while reducing energy costs.