Lennox International Inc DAVE LENNOX SIGNATURE COLLECTION GAS FURNACE, SL280DFV

Page 53

Integrated Control Diagnostic Codes (continued)

Code

Diagnostic Codes/Status of Equipment

Action Required to Clear and Recover

 

 

 

E 312

Restricted air flow in cooling or continuous fan mode is lower than cfm

Warning Only. Restricted airflow − Indoor blower is

 

setting.

running at a reduced CFM (Cutback Mode − The

 

 

variable speed motor has pre−set speed and torque

 

 

limiters to protect the motor from damage caused

 

 

by operating outside of design parameters (0 to 0.8"

 

 

W.C.. total external static pressure). Check filter and

 

 

duct system. To clear, replace filter if needed or re-

 

 

pair/add duct. Cleared after the current service de-

 

 

mand is satisfied.

 

 

 

E 313

Indoor or outdoor unit capacity mismatch. Communication only.

Incorrect indoor/outdoor capacity code selected.

 

 

Check for proper configuring in installation instruc-

 

 

tions. Alarm is just a warning. The system will oper-

 

 

ate, but might not meet efficiency and capacity pa-

 

 

rameters. Alarm will clear when commissioning is

 

 

exited. Cleared after commissioning is complete.

 

 

 

E 331

Global network connection − Communication link problem.

For Future Use.

 

 

 

E 334

Relay

Replace integrated control.

 

 

 

E 347

No 24 Volt output on Y1 of "integrated control" with non communicating

Operation stopped. Y1 relay / Stage 1 failed. (Pilot

 

outdoor unit.

relay contacts did not close or the relay coil did not

 

 

energize; no input back to IFC chip). Critical Alert.

 

 

Cleared after reset and Y1 input sensed.

 

 

 

E 348

No 24 Volt output on Y2 of "integrated control" with non?communicating

Y2 relay / Stage 2 failed. (Pilot relay contacts did

 

outdoor unit.

not close or the relay coil did not energize; no input

 

 

back to IFC chip). Critical Alert. Cleared after reset

 

 

and Y1 input sensed.

 

 

 

E 349

No 24 Volts between R & O on "integrated control" with non communi-

Configuration link R to O needs to be restored. Re-

 

cating outdoor unit (Dual fuel module required for heat pump application).

place link or hard−wire. Applicable in non communi-

 

 

cating mode. Critical Alert.

 

 

 

E 370

Interlock switch sensed open for 2 minutes.

Control sees the loss of 24VAC for 2 minutes .Ter-

 

 

minate all services and wait for interlock switch to

 

 

close. The alarm will clear when 24VAC is continu-

 

 

ously sensed on DS terminal for a minimum of 10

 

 

seconds or on a power reset.

 

 

 

E 400

LSOM − Compressor internal overload tripped.

Thermostat demand Y1 is present; but, compressor

 

 

is not running. Check power to outdoor unit. Clears

 

 

the error after current is sensed in both RUN and

 

 

START sensors for at least 2 seconds, or after ser-

 

 

vice is removed, or after power reset.

 

 

 

E 401

LSOM Compressor long run cycle or low system pressure.

Compressor ran more than 18 hours to satisfy a

 

 

single thermostat demand. Critical Alert. Clears the

 

 

error after 30 consecutive normal run cycles or

 

 

power reset. Also monitors low pressure switch

 

 

trips.

 

 

 

E 402

LSOM − Outdoor unit system pressure trip.

Discharge or suction pressure out−of−limits, or com-

 

 

pressor overloaded. Clears the error after 4 consec-

 

 

utive normal compressor run cycles.

 

 

 

E 403

LSOM − Compressor short−cycling. .(Running less than 4 minutes). Out-

Compressor runs less than 3 minutes to satisfy a

 

door unit pressure trip

thermostat demand. Clears the error after 4 consec-

 

 

utive normal run cycles or power reset.

 

 

 

E 404

LSOM − Compressor rotor locked. Compressor short−cycling. (Running

Compressor rotor locked up due to run capacitor

 

less than 4 minutes).

short, bearings are seized, excessive liquid refriger-

 

 

ant, etc. Clears the error after 4 consecutive normal

 

 

run cycles or after power reset.

 

 

 

E 405

LSOM − Compressor open circuit.

Compressor circuit open (due to power disconnec-

 

 

tion, open fuse, etc.) Clears the error after 1 normal

 

 

compressor run cycle.

 

 

 

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Contents Table of Contents Installation Instructions SL280DFVTOP View Unit Dimensions − inches mmParts Arrangement Shipping and Packing List Safety InformationSL280DFV Gas Furnace General Use of Furnace as Construction HeaterCombustion, Dilution & Ventilation Air Equipment in Confined Space ALL AIR from Inside Equipment Confined Space ALL AIR from Outside Equipment in Confined Space ALL AIR from OutsideEquipment in Confined Space NON−COMBUSTIBLE Floor Opening Size Downflow InstallationSL280DFV Unit Setting EquipmentCooling Coil Properly Plenum Sized Floor OpeningFilters Venting Duct SystemTables for installations −1/2 MIN MAX 126 FAN + FAN FAN + NAT 168 Carbon Monoxide Poisoning Hazard Gas PipingGas Pipe Capacity − ft3/hr m3/hr MAKE−UP BOX ElectricalNon−Communicating Icomfortt Integrated Control Outdoor Unit Icomfort Touch 120V Connections System WiringApplications 24V Humidifier ConnectionsSL280 Field Wiring Applications With Conventional Thermostat OFF Single Stage Thermostat w Dual fuel capa Bilities SL280DFV Schematic Wiring Diagram Typical SL280DFV Field Wiring Diagram + = Data High Connection − = Data LOW Connection Integrated Control−10% approx OFF On−Board Links Blower Data 1400 Operating System Demand System Response Sequence VAC Room Thermostat Calls for First Stage Cooling GAS Valve Shown in on Position Unit Start−UpProper Combustion Gas Pressure AdjustmentHigh Altitude Manifold Pressure SettingsHeating Sequence of Operation Other Unit AdjustmentsSEC Heating Operation with TWO−STAGE ThermostatElectrical SHOCK, Fire Or Explosion Hazard ServiceSL280DFV BURNER, Combustion AIR Inducer Assembly Page Repair Parts List Planned ServiceIntegrated Control Diagnostic Codes Integrated Control Diagnostic ModesEquipment is unable to communicate. Indicates Reconfigure the system. Replace control if heating Low pressure switch failed open To flame failure Limiters to protect the motor from damage caused Sor run cycle, or after power reset Volt power−up of the furnace control, Program Unit Capacity/Size ModeCall for FIRST−STAGE Heat Troubleshooting Heating Sequence of OperationCall for Heat Satisfied Call for SECOND−STAGE Heat2ND Stage Heat Call for Heat Satisfied FIRST−STAGE Heat SECOND−STAGE HeatCall for Cooling Troubleshooting Cooling Sequence of OperationCall for FAN Troubleshooting Continuous Fan Sequence of Operation
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DAVE LENNOX SIGNATURE COLLECTION GAS FURNACE, SL280DFV specifications

Lennox International Inc has made a significant mark in the heating, ventilation, and air conditioning (HVAC) industry, known for its commitment to innovation and energy efficiency. One of its standout products is the SL280DFV model, a high-efficiency gas furnace designed to meet the needs of modern homes.

The SL280DFV boasts an impressive Annual Fuel Utilization Efficiency (AFUE) rating of up to 80%. This rating indicates that the furnace converts 80% of the fuel it consumes into usable heat, making it a cost-effective choice for homeowners. The high efficiency not only reduces energy bills but also lessens the environmental impact by minimizing greenhouse gas emissions.

One of the key features of the SL280DFV is its two-stage gas valve operation. This technology allows the furnace to operate at two levels of heating output: low stage for milder days and high stage for extremely cold temperatures. This adaptability enhances comfort by maintaining more consistent indoor temperatures while also saving energy when full power is unnecessary.

Another innovative aspect of the SL280DFV is its variable-speed blower motor. This smart technology enables the furnace to adjust airflow based on the heating needs of a home, which promotes quiet operation and improved temperature consistency throughout living spaces.

The SL280DFV is equipped with a durable heat exchanger that is designed to withstand the rigors of daily use, contributing to the unit’s longevity. Additionally, the furnace features a smart ignition system that ensures reliable start-ups, so homeowners can depend on it through the coldest winter nights.

Safety is also a priority in the design of the SL280DFV. It includes various safety features such as a built-in flame sensor and advanced venting system, designed to avert hazardous situations and ensure optimal operation.

Furthermore, Lennox offers convenient installation and maintenance support, making the SL280DFV not only an efficient heating solution but also a practical choice for homeowners. With its blend of advanced technology, high efficiency, and reliability, the Lennox SL280DFV is an appealing option for those looking to upgrade their home’s heating system, promising comfort and peace of mind for many winters to come.
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