SiUS371614E Other ControlFunctions and Control 888. Other Control8.1 Backup OperationIf any of the compressors goes wrong, disable the relevant compressor or the relevant outdoor unitfrom operating, and then conduct emergency operation only with operational compressors oroutdoor units."Emergency operation with remote controller reset" and "Emergency operation with outdoor unitPCB setting" are available(1) Emergency operation with remote controller resetOperating methodReset the remote controller. (Press the button for 4 seconds or more.)Details of operationDisable the defective outdoor unit from operating, and then only operate other outdoor units.(On the system with 1 outdoor unit, this emergency operation is not available.)(2) Emergency operation with outdoor unit PCB settingSetting methodMake setting of the compressor, "the operation of which is to be disabled", in field settingmode (setting mode 2).Details of operationDisable the compressor with "operation disable setting" made from operating and onlyoperate other compressors.(On the system with 1 compressor, REYQ72TA, this emergency operation is not available.)8.2 Demand OperationIn order to save the power consumption, the capacity of outdoor unit is saved with control forciblyby using “Demand 1 Setting” or “Demand 2 Setting”.To operate the unit with this mode, additional setting of “Continuous Demand Setting” orexternal input by external control adaptor for outdoor unit is required.8.3 Heating Operation ProhibitionHeating operation is prohibited when the outdoor air temperature is above 24°C (75.2°F).Operating methodApplicable model(1) Emergency operation withremote controller reset(Auto backup operation)(2) Emergency operation withoutdoor unit PCB setting(Manual backup operation)REYQ96-168TA – Backup operation by thecompressorREYQ192-456TA Backup operation by theoutdoor unit Backup operation by theoutdoor unitON/OFFSetting item Condition ContentDemand 1 Level 1 The compressor operates at the power of 60% or less of the rating.Level 2 The compressor operates at the power of 70% or less of the rating.Level 3 The compressor operates at the power of 80% or less of the rating.Demand 2 The compressor operates at the power of 40% or less of the rating.Demand 3 Forced thermostat OFF
