Casper air conditioner error codes
Indicator lamps and blink codes
By model series
All codes
E0Indoor and outdoor communication failureE1Indoor room temperature sensor (IRT)E2Indoor coil temperature sensor (IPT)E3Outdoor coil temperature sensor (OPT)E4System abnormityE5Model configuration wrongE6Indoor fan motor faultE7Outdoor temperature sensorE8Exhaust temp. sensorE9IPM drive and module faultEACurrent sensor faultECOutdoor communication failureEEIndoor unit EEPROM faultEFOutdoor fan motor fault (DC motor)EPTemp. switch fault ( on top of the compressor)EUVoltage sensor faultP0Module protection (hardware control)P1Overvoltage /lower voltage protectionP2Overcurrent protectionP4Exhaust over temperature protectionP5Too cool protection in cooling modeP6Overheat protection in cooling modeP7Overheat protection in heating modeP8Outdoor over temperature / lower temperature protectionP9Drive protection (software control )LED:BLINK=1IPM protectionLED:BLINK=2Over voltage /lower voltageLED:BLINK=3OvercurrentLED:BLINK=4Exhaust over temperature protectionLED:BLINK=5Outdoor coil over temperature protectionLED:BLINK=6Drive fault and protection (V1，VP1)LED:BLINK=7Communication fault with indoor unitLED:BLINK=8Compressor overheat fault (compressor top switch)LED:BLINK=9Short-circuit / open-circuit fault of outdoor temperature sensorLED:BLINK=10Short circuit / open-circuit fault of outdoor heat exchanger temperature sensorLED:BLINK=11Short-circuit / open-circuit fault of exhaust temperature sensorLED:BLINK=12Voltage sensor faultLED:BLINK=13Current sensor faultLED:BLINK=14IPM faultLED:BLINK=15Communication fault between power source board and IPMLED:BLINK=16No feedback from DC fan motor(outdoor unit)LED:BLINK=17Defrost state