What causes Hitachi Air Conditioner to activate safety device from excessively low suction pressure?
If your Hitachi Air Conditioner activates the safety device from excessively low suction pressure, inspect refrigerant levels and piping for blockages. This issue is often due to a shortage or leakage of refrigerant, piping clogging, a closed expansion valve, or a locked fan motor.
Why does my Hitachi Air Conditioner activate safety device from excessively high discharge pressure?
If your Hitachi Air Conditioner activates the safety device due to excessively high discharge pressure, inspect the heat exchanger and refrigerant conditions. This activation can be caused by overload (obstruction of HEX, short circuit), a mixture of inert gas, or excessive refrigerant.
How to fix Hitachi Air Conditioner transmission alarm?
If your Hitachi Air Conditioner displays a 'Transmission Alarm (Not outdoor unit detected)', it typically indicates a connection issue. Check the connectors for any looseness or breakage, as the cause may be a loose, disconnected, broken, or short-circuited connector.
What does Activation of low control mean on Hitachi Air Conditioner?
General| Type | Air-to-Water Heat Pump |
|---|---|
| Refrigerant | R410A |
| Cooling Capacity | 2.5 - 16 kW |
| Operating Temperature Range (Cooling) | 46°C |
| Indoor Unit Dimensions | Varies by model |
| Outdoor Unit Dimensions | Varies by model |
| Noise Level | Varies by model |
General notes, introduction, and system overview for YUTAKI units.
Explains symbols used in the manual for safety and information.
Details classification, product lists, and accessory codes for YUTAKI units.
Provides crucial safety information and warnings for YUTAKI heat pump systems.
Key notices regarding manual reading, specifications, usage, and contacting Hitachi.
Nominal capacity and performance data for YUTAKI units, including considerations.
Energy efficiency data and performance figures according to ERP standards.
Details general specifications for YUTAKI split and monobloc systems.
Provides data on components for YUTAKI split system outdoor and indoor units.
Specifies electrical data for YUTAKI outdoor and indoor units.
Specifies the acceptable voltage and phase conditions for YUTAKI system power supply.
Defines the operational temperature limits for YUTAKI systems in heating, cooling, and DHW modes.
Details hydraulic data including flow rates, water volumes, and pressures for YUTAKI units.
Illustrates the refrigerant and hydraulic circuits for YUTAKI split systems.
Illustrates the refrigerant and hydraulic circuits for the YUTAKI M monobloc system.
Covers refrigerant piping lengths, sizes, and precautions for YUTAKI systems.
Details water piping lengths, sizes, and recommendations for YUTAKI systems.
Provides preliminary information and recommendations on water quality for YUTAKI systems.
Ensures power supply installation meets requirements and checks for electromagnetic compatibility.
Specifies wiring sizes and cable requirements for YUTAKI outdoor and indoor units.
Guides on locating and setting DIP switches and rotary switches for YUTAKI outdoor units.
Details main power supply and indoor/outdoor communication wiring connections.
Identifies and explains the function of each switch on the YUTAKI unit controller.
Explains common icons, comprehensive view icons, and room thermostat view icons.
Describes the comprehensive and simplified views of the YUTAKI unit controller main screen.
Guides through the initial setup and configuration of the YUTAKI unit controller.
Explains how to navigate through the YUTAKI controller menus for operation and settings.
Lists and explains alarm codes for indoor units, including their causes and main factors.
Lists and explains alarm codes for outdoor units, including their causes and main factors.
Outlines general maintenance procedures for YUTAKI units, including outdoor and indoor units.
Details specific maintenance checks for the outdoor unit's components like fans, heat exchangers, and piping.
Details specific maintenance checks for the indoor unit's components like cabinets, water piping, and pumps.
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