Carrier 48TJ Diagnostic Codes

Article ID: 225

Last updated: 15 Feb, 2017

Carrier Rooftop Units: 48TJ

Re: Diagnostic Codes

LED Error Code Service Analysis
Off	No power to control, Blown fuse
1 Flash	Extended fan on/off delay due to limit trip *
2 Flash	Hi Limit Switch Open
3 Flash	Flame sensed with no call for heat
4 Flash	4 consecutive limit trips
5 Flash	15 min failure to ignite
6 Flash	Failure to prove inducer motor status
7 Flash	Rollout Switch Open
8 Flash	Internal Control Fault

* The normal Fan On/Off delay is 45 seconds. If the limit switch opens before the blower energizes or if the limit opens after the blower shuts off, the IGC will automatically adjust the on/off delay time and flash Code 1.

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Article ID: 225

Last updated: 15 Feb, 2017

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