Daikin VRV II RXYQ5MY1B Service Manual

Also see for VRV II RXYQ10MY1B: Design, installation & testing instructions Installation manual

Contents

Daikin VRV II RXYQ5MY1B Service Manual Manual pdf 99 page image

Special Control SiE39-40488 Function3.3 Defrosting Operation* In the case of multi-outdoor-unit system,Master unit: Performs the operations listed in the table above.Slave units: Operating units perform the operations listed in the table above.Non-operating units perform the operations listed in the table above from the Defrost operation.(Non-operating unit stops during “Defrost preparation operation”.)* Actuators are based on RXYQ16M.Defrost operation is started when the outdoor heat exchanger temperature becomes lower than deicer temperature.Defrost operation is conducted once in max. 2 hours.Outdoor unit actuator Defrost preparationoperation Defrost operation Post Defrost operationCompressor Upper limit control 143 Hz + ON + ON1-step increase from(74 Hz + OFF + OFF) to(Pc - Pe>0.4 MPa)Outdoor unit fanSTEP8orSTEP9OFF STEP9Four way valve ON OFF ONMain motorized valve (EV1) SH control 1400 pls 200 plsSubcooling motorized valve (EV2) 0 pls 0 pls 0 plsHot gas bypass valve (SVP) OFF ON ONOil equalization valve (SVO) ON ON ONReceiver gas discharging valve(SVG) OFF OFF OFFNon-operating unit liquid pipe stopvalve (SVSL) ON ON ONEnding conditions 2 min. • 12 min.• Ts >11°C• 160 sec.• Pc - Pe>0.4MPaor orIndoor unit actuator During defrostFanThermostat ON unit OFFStopping unit OFFThermostat OFF unit OFFElectronic expansion valveThermostat ON unit 512 plsStopping unit 512 plsThermostat OFF unit 512 pls