Daikin SUPER MULTI NX CTXS07JVJU Service Manual

Also see for FDXS12DVJU: Operation manual Installation manual Service manual Service manual

Contents

Daikin SUPER MULTI NX CTXS07JVJU Service Manual Manual pdf 71 page image

Control Specification SiUS12-928_B63 Function and Control3.11 Low Hz High Pressure LimitOutline The system controls the upper limit of the frequency to prevent abnormal high pressure while thefrequency is low.Control is carried out according to three zones.DetailNote: Dropping: The system stops 2 minutes after staying in the dropping zone.3.12 Outdoor Electronic Expansion Valve ControlOutline The following items are included in the outdoor electronic expansion valve control.Outdoor electronic expansion valve is fully closed1. Outdoor electronic expansion valve is fully closed when turning on the power.2. Pressure equalizing controlRoom Distribution Control1. Gas pipe isothermal control2. SC (subcooling) control3. Liquid pipe temperature control (with all ports connected and all rooms being air-conditioned)4. Liquid pipe temperature control for stopped rooms5. Dew prevention control for indoor rotorOpen Control1. Outdoor electronic expansion valve control when starting operation2. Outdoor electronic expansion valve control when the frequency changes3. Outdoor electronic expansion valve control for defrosting4. Outdoor electronic expansion valve control for oil recovery5. Outdoor electronic expansion valve control when a discharge pipe temperature is abnormallyhigh6. Outdoor electronic expansion valve control when the discharge pipe thermistor is disconnected7. Outdoor electronic expansion valve control for indoor unit freeze-up protectionFeedback Control1. Target discharge pipe temperature control18 class 24/32 classA 140°F (60°C) 134.6°F (57°C)B 138.2°F (59°C) 132.8°F (56°C)C 132.8°F (56°C) 127.4°F (53°C)ABCHighest indoorheat exchangertemperatureamongoperating roomsReset zoneDropping zoneKeepzone(R14587)