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