Daikin F-Series Service Manual

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Contents

Daikin F-Series Service Manual Manual pdf 108 page image

SiBE12-713 Control SpecificationFunction and Control 97Detail Judgment by Input CurrentWhen an output frequency is exceeds 55 Hz and the input current is less than specified value,the adjustment is made for insufficient gas.Judgment by Discharge Pipe TemperatureWhen discharge pipe temperature is 20°C higher than target value and the electronic expansionvalue opening is 450 plus (max.), the adjustment is made for insufficient gas.3.12.4 Preventing Indoor FreezingDuring cooling, if the heat exchanger temperature in the operation stopped room becomesbelow the specified temperature for the specified time, open the electronic expansion valve inthe operation stopped room as specified, and carry out the fully closed operation. After this, iffreezing abnormality occurs more than specified time, the system shall be down as the systemabnormality.3.13 Forced Operation ModeOutline Forced operating mode includes functions such as; forced cooling, forced heating, incorrectwiring, incorrect piping check.Operating mode must be selected by operating the forced operation switch (SW1 on servicePCB).Detail Forced Cooling, Forced Heating (Only for Heat Pump Model)Item Forced Cooling Forced HeatingForced operationallowing conditions 1) The indoor unit is not abnormal, butthe indoor unit which is not in thefreezing prohibiting zone is present inmore than 1 room.1) The indoor unit is not abnormal.The indoor unit which is not in thepeak-cut prohibited zone is present inmore than 1 room.2) The outdoor unit is not abnormaland not in the 3-minute stand-bymode.←3) The operating mode of the outdoorunit is the stop mode. ←4) The slide selection switch of theforced operation is the cooling mode.The forced operation is allowed whenthe above “and” conditions are met.4) The slide selection switch of theforced operation is the heating mode.The forced operation is allowed whenthe above “and” conditions are met.Starting / adjustment If the forced operation switch ispressed as the above conditions aremet.←1) Determineoperating room All rooms One of the available units runs.Priority is given to the youngestnumber’s room in alphabetical order.(A > B > C > D)2) Commandfrequency 2YC45: 42 Hz 2YC45: 37 Hz(Outdoor air temp:0°C)3) Electronicexpansion valveopeningIt depends on the capacity of theoperating indoor unit. ←4) Outdoor unitadjustment Compressor is in operation. ←5) Indoor unitadjustment The command of forced operation istransmitted to the indoor unit. ←End 1) When the forced operation switch ispressed again. ←2) The operation is to endautomatically after 15 min. ←Others The protect functions are prior to allothers in the forced operation. ←