Daikin RQYQ140-180PY1 Service Manual

Also see for VRV III-Q RQCEQ360PY1: Operation manual Operation manual Installation manual

Contents

Daikin RQYQ140-180PY1 Service Manual Manual pdf 56 page image

Detailed Control Functions SiBE34100147 Function2.6 Protection Control2.6.1 High Pressure Protection ControlThis high pressure protection control is used to prevent the activation of protection devices due to abnormal increase ofhigh pressure and to protect compressors against the transient increase of high pressure.[In cooling operation]★ In case of multi-outdoor-unit system, the following control is performed in the entire system.Pc_max indicates the maximum value within the system.[Heating Operation and Simultaneous Cooling / Heating Operation]★ In case of multi-outdoor-unit system, the following control is performed in the entire system.Pc_max indicates the maximum value within the system.Normal OperationPc_max > 3.47 MPa Compressor step = Max. StepCompressor system:2 step down / 10 sec.Compressor system: Step 1Compressor system:1 step up / 15 sec.· Pc_max < 3.24 MPa· After 15 sec.&· Pc_max > 3.47 MPa· After 15 sec.&• Pc_max > 3.55 MPa• After 10 sec.&Pc_max > 3.64 MPa HPS (4.0 MPa) is activatedRestart standby(2 times per 30 min. at max.)Stop due to malfunction(E3 displayed)Normal OperationPc_max > 3.04 MPa Compressor step = Max. StepCompressor system:2 step down / 10 sec.Compressor system: Step 1Compressor system:1 step up / 10 sec.Pc_max < 2.79 MPa• Pc_max > 3.12 MPa• After 10 sec.&Pc_max > 3.20 MPa HPS (4.0 MPa) is activatedRestart standby(2 times per 30 min. at max.)Stop due to malfunction(E3 displayed)