Lennox International Inc SL280UH070V36A Limiters to protect the motor from damage caused

Page 65

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 SL280UHVReturn air from both sides Unit Dimensions − inches mmSide Return Air Opening Either SideSight Glass Access Panel Blower AssemblyParts Arrangement Shipping and Packing List Safety InformationSL280UHV Gas Furnace General Use of Furnace as Construction HeaterAir Handler Unit EvaporatorCombustion, Dilution & Ventilation Air Space ALL AIR from Inside Equipment in ConfinedEquipment Confined Space ALL AIR from Outside Equipment in Confined Space ALL AIR from OutsideEquipment in Confined Space Blower Motor Rigid LEG Setting EquipmentBottom Furnace Front 20 X 25 XIndoor AIR Return AIR BaseRight Horizontal Application Installation Clearances Top LeftEnd Bottom Typical Horizontal ApplicationDuct System FiltersUpflow Position VentingTop Vent Discharge Left Side Vent DischargeSide Vent Discharge Horizontal Left PositionHorizontal Right Position Disconnected Vent Common Venting Using Metal−Lined Masonry ChimneySticker Vent PipeThrough an unused masonry chimney flue is not considered Vent Connector102 127 −1/2 152 178 10−1/2 MIN MAX Feet FAN + FAN FAN + NAT 130 Carbon Monoxide Poisoning Hazard − In some localities, codes may require the installation Ers or straps. Install a drip leg in vertical pipe runs toGas Piping Every 8 to 10 feet 2.44 to 3.01 m with suitable hangRight−Side Air Discharge Horizontal ApplicationLeft−Side Air Discharge Electrical Interior MAKE−UP BOX InstallationElectrostatic Discharge ESD BOXCommunicating Non−CommunicatingIcomfortt Integrated Control Outdoor Unit Icomfort Touch Communicating System Wiring NON−COMMUNICATING System Wiring120V Connections ApplicationsDIP Switch Settings and On−Board Links See figure OFF Single Stage Thermostat w Dual fuel capa Bilities SL280UHV Schematic Wiring Diagram Typical SL280UHV Field Wiring Diagram + = Data High Connection − = Data LOW Connection Integrated ControlRS−BUS Link TB82, future use −10% approx OFF On−Board Links 985 1045940 880SL280UH090V36B Blower Performance less filter 1220 12801155 10951235 12951170 11101230 13601165 11001225 12901160 1380+18% 1605 SL280UH110V60C Blower Performance less filter +18% 1785 SL280UH135V60D Blower Performance less filter Operating Sequence Thermostat energizes Y2 CompressorUnit Start−Up For Your Safety Read Before LightingWhite Rodgers GAS Valve Honeywell GAS ValveGAS Meter Clocking Chart Gas Pressure AdjustmentProper Combustion DialHigh Altitude Heating Sequence of Operation Other Unit AdjustmentsSEC Heating Operation with TWO−STAGE ThermostatHeating Operation with Single Stage Thermostat Electrical SHOCK, Fire Or Explosion Hazard Service13− To clean the combustion air inducer visually inspect SL280UHV BURNER, Combustion AIR Inducer Assembly11− Back wash using steam. Begin from the burner opening 17− Reinstall burner box, manifold assembly and burner boxSL280UHV NOX Inserts Repair Parts List Planned ServiceIntegrated Control Diagnostic Codes Integrated Control Diagnostic ModesFurnace / air handler. Clears after fault recovered Normal operation 5 seconds after fault recoveredPower at the thermostat. Alert stops all services Equipment is unable to communicate. IndicatesMissioning and Execute ’Set Factory Default mode’ Reconfigure the system. Replace control if heatingControl will still operate on default parameter set Ate feature will be set as ’installed’ and that couldSumes normal operation after fault is cleared Low pressure switch failed openFault is cleared Tion after fault is clearedOut. Clears when flame has been proven stable Open or not within specifications −hour soft lockSoft lockout or reset To flame failureIs not running. Check power to outdoor unit. Clears Pair/add duct. Cleared after the current service deError after current is sensed in both RUN Vice is removed, or after power resetSor run cycle, or after power reset Finished 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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