What causes activation of protection control for excessively high pressure in my Hitachi RAS-4HRNME-AF?
Activation of protection control for excessively high pressure in your Hitachi Air Conditioner is caused when the high pressure (Pd) is higher than 2.78 MPa during 10 seconds.
What causes activation of protection control for excessively low pressure in my Hitachi RAS-4HRNME-AF Air Conditioner?
Activation of protection control for excessively low pressure in your Hitachi Air Conditioner is caused when the suction pressure (Ps) is lower than 0.15 MPa during 1.5 minutes.
What causes activation of low pressure control in my Hitachi RAS-4HRNME-AF?
Activation of low pressure control in your Hitachi Air Conditioner is caused when the suction pressure (Ps) is lower than 0.1 MPa during 3 seconds.
What causes excessively low pressure difference in my Hitachi Air Conditioner?
Excessively low pressure difference in your Hitachi Air Conditioner is caused when the pressure ratio calculated from high pressure (Pd) and low pressure (Ps) is lower than 1.8 MPa during 3 minutes.
What causes failure of refrigerant evaporation temperature thermistor in my Hitachi RAS-4HRNME-AF Air Conditioner?
Failure of the refrigerant evaporation temperature thermistor in your Hitachi Air Conditioner is caused if the refrigerant evaporation temperature thermistor is short-circuited or cut.
What causes failure of ambient temperature thermistor in my Hitachi RAS-4HRNME-AF Air Conditioner?
Failure of the ambient temperature thermistor in your Hitachi Air Conditioner is caused if the ambient temperature thermistor is short-circuited or cut.
General| Brand | Hitachi |
|---|---|
| Model | RAS-4HRNME-AF |
| Category | Air Conditioner |
| Language | English |
Key notices regarding compatibility, specifications, and manual usage.
Explains the heat pump's function, energy efficiency, and features.
Outlines power supply requirements, shutdown procedures, and handling of snow/ice.
Explains functions like 3-minute guard, frost prevention, auto-restart, and defrost cycles.
Guides users on identifying and resolving common operational faults and abnormal sounds.
Lists and illustrates the various components of the outdoor unit.
Shows the flow of refrigerant for cooling and heating, with component identification.
Covers transport, placement, ventilation, and protection from environmental factors.
Details required clearances for single and multiple outdoor unit installations.
Specifies requirements for concrete foundations, anchor bolts, and drainage.
Specifies copper pipe requirements, cleaning, and insulation for piping.
Details how to suspend piping and connect it to outdoor units, including pipe routing.
Covers design charts for piping length, height difference, and pipe size selection.
Outlines the process for charging refrigerant, performing vacuum tests, and pump-down.
Explains the use and connection of the drain boss for water discharge.
Covers checks for electrical data compliance, voltage, impedance, and grounding.
Details wiring connections for outdoor units and the function of DIP switches.
Provides guidelines for wiring between indoor/outdoor units and compliance with local codes.
Specifies recommended minimum wire sizes for power, transmitting, and actuator cables.
Covers checks for unit appearance, installation, electrical connections, and refrigerant circuit.
Guides users through executing and monitoring the test run using the remote control.
Details test run setup via outdoor unit DIP switches for various operational modes.
Explains protection settings for compressor high pressure and fan motor temperature.
Provides a table of alarm codes, origins, details of abnormalities, and main factors.
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