This site is aimed at professional installers and service technicians, and gives you easy access to alarm codes and technical data sheets for Airwell products.

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AW-YDZB542-H91

7SP091190

Alarm code
Displayb5
Alarm code meaningLiquid return temperature sensor disconnected or short circuited
Displayb7
Alarm code meaningGas return temperature sensor disconnected or short circuited
DisplayC5
Alarm code meaningCapacity not set or missing jumper on indoor board
Displaydn
Alarm code meaningBad wiring of communication bus or faulty EEV
DisplayE1
Alarm code meaningHigh Pressure cut off
DisplayE2
Alarm code meaningAnti freeze protection
DisplayE3
Alarm code meaningLow pressure cut off (case installation multisplits 4 and 5 indoors)
DisplayE4
Alarm code meaningCompressor over heating protection
DisplayE5
Alarm code meaningOver current protection
DisplayE6
Alarm code meaningNo communication between indoor and outdoor unit
DisplayE7
Alarm code meaningOperating mode conflit (multisplit installation)
DisplayE8
Alarm code meaningindoor or outdoor unit exchanger over heating
DisplayEE
Alarm code meaningEEPROM empty or damaged
DisplayF0
Alarm code meaningRefrigerant circuit problem
DisplayF1
Alarm code meaningIndoor ambiant temperature sensor RT2 disconnected or short circuited
DisplayF2
Alarm code meaningIndoor exchanger temperature sensor RT1 disconnected or short circuited
DisplayF4
Alarm code meaningOutdoor ambiant temperature sensor RT2 disconnected or short circuited
DisplayF5
Alarm code meaningDischarge temperature sensor T3 disconnected or short circuited
DisplayFH
Alarm code meaningAnti freeze protection
DisplayFo
Alarm code meaningPump down procedure
DisplayH1
Alarm code meaningDefrosting or oil return procedure on going
DisplayH3
Alarm code meaningCompressor overload protection
DisplayH4
Alarm code meaningTemperature protection too high or voltage too high
DisplayH5
Alarm code meaningInverter module protection
DisplayH6
Alarm code meaningNo fan motor feedback on indoor unit board
DisplayH7
Alarm code meaningCompressor desynchronisation
DisplayHC
Alarm code meaningPFC module protection
DisplayHE
Alarm code meaningCompressor demagnetization protection
DisplayL3
Alarm code meaningDC outdoor fan motor protection
DisplayL9
Alarm code meaningPower supply protection
DisplayLc
Alarm code meaningFaulty start up
DisplayLd
Alarm code meaningMissing phase or mixed phase protection
DisplayLP
Alarm code meaningIndoor and outdoor unit not compatible
DisplayoE
Alarm code meaningPFC module temperature sensor disconnected or short circuited
DisplayP5
Alarm code meaningOvercurrent protection on compressor phases
DisplayP7
Alarm code meaningPCB temperature sensor disconnected or short circuited
DisplayP8
Alarm code meaningHeat Sink module over heating (power board)
DisplayPH
Alarm code meaningDC over voltage
DisplayPL
Alarm code meaningDC voltage too low
DisplayPU
Alarm code meaningFaulty capacitors charging
DisplayU1
Alarm code meaningCompressor phase problem
DisplayU3
Alarm code meaningVoltage drop on communication bus
DisplayU5
Alarm code meaningAlternating current (AC) detection problem
DisplayU7
Alarm code meaningReversing valve blocked
DisplayU8
Alarm code meaningZero crossing protection on indoor unit
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