Integrated Control

RED LED

Diagnostic Codes / Status of Furnace

Flash Code

 

 

 

Off

No power to control or board fault detected

 

 

On

Board fault detected,

 

 

Heartbeat1

Control powered - displayed during all modes of operation if no errors are detected

1

Reverse Line Voltage Polarity

 

 

2

Improper Earth Ground

 

 

3

Burner failed to light, or lost flame during heat demand

 

 

4

Low Flame Signal - check flame sensor

 

 

5

Watchguard - burner failed to light, exceeded maximum number of retries or recycles.

 

 

6

Not Used

 

 

7

Primary or Secondary Limit Open or Watchguard Mode - Limit Switch Open longer than 3 minutes

 

 

8

Rollout Switch Open

 

 

9

Pressure Switch failed to close or opened during heat demand

 

 

10

Watchguard - Pressure Switch opened 5 times during one heat demand

 

 

11

Pressure Switch stuck closed prior to activation of combustion air inducer

 

 

12

Flame Sensed without gas valve energized

 

 

13

Low Line Voltage

 

 

 

Notes

 

 

Note 1

A ”Heartbeat” is indicated by a ”Slow Flash” - 1 sec on 1 sec off, repeating

 

 

Note

Error codes are indicated by a ”Rapid Flash” - the LED flashes X times at 1/2 sec on 1/2 sec off, remains

off for 3 sec, then repeats

 

 

 

 

Last 10 error codes are stored in memory including when power is shut off to the unit. - To recall, press

Note

and release button, most recent will be displayed first, LED off for 3 sec, then next error code is displayed,

 

etc. To clear error codes, depress and hold button longer than 5 seconds.

 

 

 

INTEGRATED CONTROL

(Automatic Hot Surface Ignition System)

RED LED

BLOWER OFF DELAY

RECALL BUTTON

FIGURE 30

 

TABLE 7

 

 

1/4” QUICK CONNECT TERMINALS

 

 

120HUM

Humidifier 120VAC

 

 

LINE

120VAC

 

 

XFMR

Transformer 120VAC

 

 

CIRC

Indoor blower 120VAC

 

 

EAC

Indoor air quality accessory 120VAC

 

 

NEUTRALS

Common 120VAC

 

 

HUM24

Humidifier 24VAC

 

 

3/16” QUICK CONNECT TERMINALS

 

 

COOL

Cooling tap 24VAC

 

 

HEAT

Heating tap 24VAC

 

 

FAN

Continuous blower 24 VAC

 

 

PARK (no power)

Park terminal for speed taps

 

 

FLAME/FS

Flame sense

 

 

24 COM

Common 24VAC

 

 

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Lennox International Inc EL180UHE Integrated Control, Automatic Hot Surface Ignition System, Flash Code

EL180UHE specifications

Lennox International Inc. has long been a leader in providing innovative heating and cooling solutions, and the EL180UHE represents a notable advancement in their line of high-efficiency gas furnaces. Designed to meet the demands of residential heating, this unit combines advanced technology with user-friendly operation and significant energy savings.

One of the standout features of the EL180UHE is its efficiency rating, with an Annual Fuel Utilization Efficiency (AFUE) of up to 80%. This high efficiency not only helps homeowners save on energy bills but also reduces their carbon footprint. The furnace is equipped with a reliable, multi-speed blower motor, which enhances comfort levels by maintaining consistent air circulation throughout the home.

The EL180UHE employs advanced combustion technologies, such as Lennox's low-NOx burner, which minimizes nitrogen oxide emissions, contributing to a cleaner environment. The unit is also designed with a sealed combustion system that draws air directly from the outdoors rather than from inside the home, leading to improved indoor air quality and increased safety.

Another significant characteristic of the EL180UHE is its whisper-quiet operation. This is achieved through well-engineered insulation and a design that minimizes noise levels, allowing for a comfortable living environment without disruptive sounds. Many homeowners appreciate the quiet performance, especially during the night or in spaces where noise is a concern.

The installation process is straightforward, supported by Lennox's user-friendly design. The EL180UHE is compatible with various home configurations and can easily integrate with existing HVAC systems. Additionally, it has a compact footprint, making it suitable for homes with space constraints.

Further enhancing its appeal, this gas furnace features robust warranty options, reflecting Lennox's commitment to quality and customer satisfaction. Homeowners can rest assured that they are investing in a durable product that has been built to last.

In conclusion, Lennox International Inc.'s EL180UHE gas furnace exemplifies the company's dedication to innovation, efficiency, and reliability in home heating solutions. With its high AFUE rating, advanced combustion technology, quiet operation, and user-friendly design, the EL180UHE is an excellent choice for homeowners looking to enhance their comfort while minimizing energy costs.