Ducted Heating
E203 means different things on different Ducted Heating models. Enter your model number to see only your reading, or find your model below.
Models: SL280DFNV, SL280UHV, SL297UHNV
No appliance capacity code selected. Check for proper con- figuring under: Unit Size Codes for Furnace on configuration guide or in installation instructions. Critical Alert. Cleared af- ter valid unit code is read following a reset. (Remove thermo- stat from system while applying power and reprogramming.)
Appliance capacity / size is NOT pro- grammed. Invalid unit codes refer to con- figuration flow chart.
Appliance capacity / size is NOT pro- grammed. Invalid unit codes refer to con- figuration flow chart.
Appliance capacity / size is NOT pro- grammed. Invalid unit codes refer to con- figuration flow chart.
Models: SLP98UHV, SLP99UHV
No furnace size code selected. Check unit size codes on configuration guide or in installation instructions.
Appliance capacity / size is NOT programmed. Invalid unit codes refer to configuration flow chart in installation instructions.
Appliance capacity / size is NOT programmed. Invalid unit codes refer to configuration flow chart in installation instructions.
Models: SL280DFNV
In IDLE (no heating, cooling or indoor fan), hold button until solid P, release; P begins blinking. Hold to cycle each size code for three seconds. Correct code released flashes for ten seconds; hold five seconds within that period to store and reset. Expired period or shorter hold exits to IDLE without storing. Cycle24V to verify nonvolatile size; three bars mean repeat programming.
Furnace control does not recognize unit size code: three horizontal bars followed by continuous E203.
Continue in ACLogics with guided diagnosis for your equipment and symptoms.
