INTEGRATED FURNACE

 

TROUBLESHOOTING

CONTROL MODULE

 

GUIDE

 

 

 

 

 

 

 

 

 

 

CHART 1

Place

1A1B

Indoor Blower

Check

1C

Does LED

flash 1 time YES when disconnect

is turned

ON?

NO

thermostat

fan switch in

the ON

position.

1D

Is 24V

present at YES control

terminals

R & C?

NO

Replace control.

Check operation.

Does indoor

YES

blower run at

 

HEAT speed?

 

NO

1E

Is 24V

present at YES control

terminals

G & C?

NO

Return fan

switch to

AUTO position.

1F

Is 120V

 

Indoor blower

present at

YES

fault. Repair or

control terminals

 

replace. Check

COOL & CIR

 

 

operation.

NEUTRAL?

 

 

 

NO

 

 

 

 

Replace control.

 

 

Check operation.

 

 

Repair wiring

 

 

from control to

 

 

thermostat. Check

 

 

operation.

TECHNICAL HELP

1G

Is 120V

present across

control terminals YES LINE & LINE NEUTRAL?

NO

Correct 120V

power supply. Check

operation.

1H NO

Is 120V

present at YES control terminals

XFMR & XFMR

NEUTRAL?

1I

 

1J

 

1K

 

Is 120V

 

Is 24V

 

Is 24V

 

 

 

present

 

present across

YES

present across

YES

across 12-pin

 

primary of control

 

secondary of

 

connector pins TH

YES

transformer?

 

transformer?

 

& TR on the

 

 

 

 

control?

 

NO

 

NO

 

NO

 

Repair wiring to

 

Replace

 

Repair wiring

 

 

 

and/or plug

 

transformer. Check

 

transformer. Check

 

 

 

 

connection. Check

 

operation.

 

operation.

 

 

 

 

operation.

 

 

 

 

 

 

!WARNING

If diagnostic indicator (LED)

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

260

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Emerson 50A55 manual 1A1B, 1H no

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.