Do you have a question about the Hitachi Utopia RAS-4HVRG and is the answer not in the manual?
Cooling Capacity (BTU) | 12000 |
---|---|
Power Supply (V) | 220-240 |
Refrigerant | R410A |
Indoor Unit Weight | 9 kg |
Power Supply (Hz) | 50 |
Outdoor Unit Dimensions (WxHxD) | 780 x 540 x 260 mm |
Covers basic checks, wiring, display readings, and common faults.
Details alarm codes, troubleshooting flowcharts, and check modes for diagnostics.
Explains self-checking methods for PCBs and other major components.
Step-by-step instructions for disassembling and removing outdoor unit parts.
Details inverter specifications, arrangement, and protection functions.
Explains the AC Chopper mechanism for fan motor control.
Describes the auto-louver operation and stoppage for different cassette types.
Details the reliable mechanism, principle, and structure of scroll compressors.
Explains the function and location of various thermistors in indoor and outdoor units.
Covers specifications and operation of electronic expansion valves.
Explains the function of high pressure and control pressure switches.
Addresses overheating issues and provides a procedure for self-checking.
Explains the cause and countermeasure for Alarm 36 (incorrect unit combination).
Provides guidelines for selecting appropriate drain pipe diameters.
Outlines inspection and maintenance procedures for indoor and outdoor units.
Provides wiring diagrams for specific RCI model series.
Illustrates the refrigerant flow for single-type systems.