FRIEDRICH Air Conditioner Error Codes

Error Code Code Translation Action Taken By Unit Possible Cause

 

EF Error Free None Unit Operating Normally

 

02 An extreme low vollage condition exists <198V for 230V units and <239V for 265V units. Shut unit down. Flash error code. When voltage nses to adequate level normal unit operation is restored. - Inadequate power supply ■ Defective breaker ■ Blown fuse

 

03 Return air thermistor sensor open or short circuit Leave unit running. Alternately flash error code and set point. ■ Defective sensor

 

04 Indoor coil thermistor sensor open or short circuit Leave unit running. Alternately flash error code and sat point. ■ Defective sensor

 

05 Outdoor coit thermistor sensor open or short circuit Leave unit running. Switch to Eledric Heat Mode (Heat Pump only). Alternately flash error code and sal point. ■ Defective sensor

 

06 Outdoor coil Temperature > 175° F for 2 consecutive minutes. (Heat Pomp models only) Shut unit down for 5 minutes. Alternately flash error code and set point, then try again 2 limes, If unit fails the 3rd time then shut unit down and alternately flash error code and set point. ■ Dirty coil ■ Fan motor failure ■ Restricted air flow • Non-conden sables in refrigeration sys

 

07 indoor coil temperature <30° F for 2 consecutive minutes. Shut down Compressor, and continue fan operation. Alternately flash error code and set point until the mdocr coil thermistor reaches 45°' F. Then, {after lockout time of 180 to 240 seconds expires), re-anergize the compressor . • Dirty Alters ■ Dirty coil • Fan molar failure ■ Restricted air flow ■ improper refrigerant charge ■ Restriction in refrigerant circuit

 

08 Unit cycles (Heat or Cool demand) > 9 times per hour Leave unit running. Store error code in memory. ■ Unit oversized ■ Low load conditions

 

09 Unit cycles (Heat or Cool demand) < 3 times per hour Leave unit running. Store Error Code in memory. ■ Unit undersized ■ High load conditions

 

10 Ftoom Freeze Protection triggered Leave unit running. Alternately flash error code and set point. ■ Room temperature fall below 40°F

 

11 No Signal to “GL or "GM' terminal Shut unit down. Flash error code. ■ Defective remote thermostat ■ Defective thermostat wiring

 

12 Discharge air temperature >185° F Shut down Compressor and/or Heater, and energize high fan. Alternately flash error code and set point. If condition repeats throe times in one hour, shut unit down. • Restricted air flow ■ Fan motor failure

 

13 Pressure switch jumper wire loose/missing High Pressure switch open (If so equipped) Shut unit down. Flash error code. ■ Dirty coil • Fan motor failure ■ Restricted air flow ■ Non-condensables in refrigeration system

 

14 Discharge air temperature sensor open dr shorted Leave unit running. Alternately flash error code and set point. ■ Defective Sensor