Lennox icomfort Setup Manual page 32

Alarm ID Message Name
125 Control Hardware Problem
126 Control Internal Communication Problem
130 Configuration Jumper Missing
131 Corrupted Control Parameters
132 Failed Flash CRC Check (Check Sum) Software
is corrupted.
180 Outdoor Temperature Sensor Problem
200 Rollout Limit Switch Open
201 Indoor Blower Motor Problem
202 ID Blower Motor & Unit Size Mismatch
203 Invalid Unit Code
204 Gas Valve Problem
205 Gas Valve Relay Contact Closed
207 HSI Sensed Open
223 Low Pressure Switch Open
224 Low Pressure Switch Stuck Closed
225 High Pressure Switch Failed to Close
226 High Pressure Switch Stuck Closed
227 Low Pressure Switch Open in Run Mode
228 Inducer/Pressure Switch Calibration Failure
240 Low Flame Current − Run Mode
506052−01 11/09
Alarm Codes and Troubleshooting
Action required to Clear/Recover
Hardware problem on the control board. Cycle power on control. Replace if problem prevents service and is
persistent.
Hardware problem on the control board. Cycle power on control. Replace if problem prevents service and is
persistent.
Configuration jumper(s) missing on control board (applicable in non−communication only).
Reconfigure the system. Replace board if service (heating cooling) is not viable.
Recycle power, if re−occurs replace control.
Compare outdoor sensor resistance to temperature/resistance charts in installation instructions. Replace if
necessary.
Correct unit cause of rollout trip or replace flame rollout switch and test furnace operation.
Indoor blower communication failure including power outage. Check wiring to motor.
Incorrect appliance capacity code selected. Check for proper configuring under: Unit Size Codes for Furnace/Air
Handler on configuration guide or in installation instructions.
No appliance capacity code selected. Check for proper configuring under: Unit Size Codes for Furnace/Air
Handler on configuration guide or in installation instructions.
Check operation and wiring of gas valve.
Check wiring to relay; if wiring is correct, replace relay.
Measure resistance of Hot Surface Ignition ignitor. Replace if open or not within specification range found in
IOM.
Check inches of water column closing pressure of low pressure switch on heat call, measure inches of water
column of operating pressure, inspect vent and combustion air inducer for correct operation and restriction.
Check operation of low pressure switch for stuck closed on heat call, measure inches of water column of oper-
ating pressure, inspect vent and combustion air inducer for correct operation and restriction.
Check inches of water column closing pressure of high pressure switch on heat call, measure inches of water
column of operating pressure, inspect vent and combustion air inducer for correct operation and restriction.
Check operation of high pressure switch for closing on heat call, measure inches of water column of operating
pressure, inspect vent and combustion air inducer for correct operation and restriction.
Check inches of water column closing pressure of low pressure switch on heat call, measure inches of water
column of operating pressure, inspect vent and combustion air inducer for correct operation and restriction.
Unable to perform pressure switch calibration. Check vent system and pressure switch wiring connections.
Check micro amperes of flame sensor in board diagnostics or field installed mode; clean or replace sensor.
Measure voltage of neutral to ground for good unit ground.
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