INTEGRATED FURNACE

 

 

TROUBLESHOOTING

CONTROL MODULE

 

 

GUIDE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CHART 2

Cooling

Cycle

Check

Place thermostat system switch in cooling mode and fan switch in AUTO position. Lower temperature selection lever to call for a cooling cycle. R & Y contacts close.

2A

Does indoor

blower energize

at cooling

fan speed?

NO

YES

2B

Return thermostat

to desired

setting.

2C

2D2E

2F

Does

indoor blower

energize at heating fan speed?

NO

2G

Is 24V

Is

YES thermostat terminal YES Y connected to furnace

terminal Y?

NO

Correct wiring

from thermostat terminal Y to Y on furnace. Check operation.

With door

switch closed, jumper control terminals

R & Y.

Does

indoor blower YES energize at

cooling fan

speed?

NO

2H

Is 120V

present at YES control terminals

COOL & CIR

NEUTRAL?

NO

Repair low

voltage wiring to thermostat. Check operation.

Indoor blower fault. Repair or replace motor.

Check operation.

present across

control terminals

Y & C?

NO

2I

Is 24V

present at

control terminals

R & C?

YES

YES

 

2J

 

2K

NO

Is 24V

NO

Is 120V present

present at

at primary of

 

control terminals

 

 

 

transformer?

 

G & C?

 

 

 

 

 

YES

 

NO

 

 

 

2L

 

 

 

Is 120V

 

 

 

present at

 

 

 

control terminals

 

 

 

LINE & LINE

 

 

 

NEUTRAL?

 

 

 

NO

YES

YES

Replace control. Check operation.

Replace

transformer.

Check operation.

Repair wiring

between control and

transformer

primary. Check

operation.

TECHNICAL HELP

voltage wiring to

Repair low

power supply to

! WARNING

voltage wiring

Repair low

 

Correct 120V

 

thermostat.

from transformer to

control. Check

If diagnostic indicator (LED)

control. Check

Check operation.

operation.

 

operation.

 

shows continuous flashing, turn

 

 

 

 

 

 

off gas supply at source before

 

 

 

disconnecting electrical power!

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Emerson 50A55 manual 2D2E, Correct wiring, Correct Thermostat

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.