76[Heating] According to indoor pipe temperature, automatic heating fan speed is determined as follows.RPM IncreasedRPM MaintainRPM ReducedOFFIndoor Pipe Temp.35o C39 oC16o C19 oCB. Feedback control Immediately after the fan motor started, feedback control is performed once every second. During fan motor on, if fan motor feedback ≥ 2550 rpm or < 50 rpm continue for 10 seconds, then fan motor errorcounter increase, fan motor is then stop and restart. If the fan motor counter becomes 7 times, then H19 - fanmotor error is detected. Operation stops and cannot on back.14.3 Outdoor Fan Motor OperationOutdoor fan motor is operated with one fan speed only. It starts when compressor starts operation and it stops30 seconds after compressor stops operation.Compressor:Outdoor Fan:ONONONONFan SpeedOFFOFF30 sec During cooling operation, and outdoor ambient temperature is below 8°C, outdoor fan speed will be controlledaccording to outdoor piping temperature as following:OD Pipe TemperatureA 26°CB 33°C During above condition, when indoor heat exchanger temperature is below 5°C, the outdoor fan will stopaccording to outdoor piping temperature as following:AMP Air Conditioningwww.ampair.co.uk | sales@ampair.co.uk