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Hiyasu HS-9U2IM - User Manual

Hiyasu HS-9U2IM
19 pages
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Service Manual
Applied to:
Multi Split Type
Heat Pump Air Conditioners
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Summary

Product Features

Product Feature Highlights

Lists key features like powerful cooling/heating, low voltage start-up, anti-icing, auto-defrost, and protection.

Specifications

Alfa Series Model Specifications

Details technical specifications for Alfa series indoor and outdoor units, including capacity, power, and dimensions.

Outdoor Unit Model Specifications

Provides technical specifications for outdoor units, covering cooling/heating capacity, compressor, and fan motor details.

Dimensions

Indoor Unit Dimensions

Illustrates the physical dimensions of the 7/9K and 12K indoor units with detailed diagrams.

Outdoor Unit Dimensions

Presents the physical dimensions of the outdoor unit with detailed diagrams.

Refrigeration Cycle Diagram

Refrigeration Circuit Drawing

Shows the refrigeration circuit for the inverter binary type, detailing components like the compressor and expansion valves.

Operation Limits

Indoor Unit Combinations

Model Combination Guidelines

Outlines valid indoor unit combinations for specific outdoor models, with capacity limits.

Wiring Diagrams

Indoor Unit Wiring

Provides a detailed wiring diagram for the indoor unit, showing connections to the main board and sensors.

Outdoor Unit Wiring

Presents the wiring diagram for the outdoor unit, illustrating connections for the compressor, valves, and boards.

Electronic Control Functions

Electric Control Environment

Specifies the working environment for electronic controls, including input voltage, frequency, and current limits.

Indoor Unit Display Board Indicators

Explains the function of each indicator (AUTO, TIMER, TEMP, OPERATION, SLEEP) on the indoor unit's display.

Outdoor PCB Digital Display

Describes the digital display tube on the outdoor PCB and its functions during standby, operation, and error states.

Outdoor Unit Point Check Function

Details how to use the check switch for monitoring compressor frequency, running mode, capacity demand, and ambient temperature.

Protection Mechanisms

Outlines various protection functions, including compressor restart delay, discharge temperature, voltage, and fan speed control.

Fan-Only Mode Operation

Explains fan speed settings (high/mid/low/Auto) available for the fan-only operation mode.

Cooling Mode Operation

Details indoor fan speed control based on temperature difference and anti-freezing protection for the evaporator.

Dehumidifying Mode Operation

Describes fixed low fan speed and low room temperature protection during dehumidifying mode.

Heating Mode Operation

Covers indoor fan actions, anti-cold wind control, and auto wind settings for heating mode.

Heating Mode Controls & Anti-Cold Wind

Details fan speed control for anti-cold wind and auto wind, plus evaporator high-temperature protection.

Defrost Operation

Explains the conditions for initiating and ending defrosting, and the actions taken during defrost.

Automatic Operation Mode

Describes how the unit automatically selects cooling, heating, or fan-only mode based on temperature differences.

Manual Switch Functionality

Explains mode changes and specific operations triggered by the manual switch button.

Timer Functionality

Details the timer's maximum length, minimum resolution, and the functions of Timer On/Off and Timer Off/On.

Sleep Mode Functionality & Auto Restart

Covers sleep mode operation for cooling, heating, auto modes, and the auto restart function after power failure.

Plasma Function

Describes when the plasma function activates and deactivates, related to indoor fan operation and front panel status.

Mode Conflict Rules

Explains how the unit handles conflicts when indoor units are set to different modes (cooling, heating, fan) and priority rules.

Troubleshooting

Safety Precautions

Warns about stored electrical charge in capacitors on the PCB and the need for discharge before maintenance.

Hiyasu HS-9U2IM Specifications

General IconGeneral
TypeSplit System
Cooling Capacity9000 BTU/h
Power Supply220-240V, 50Hz
Energy Efficiency Ratio (EER)3.21
Coefficient of Performance (COP)3.61
RefrigerantR410A
Operating Temperature (Heating)-7-24°C
Noise Level (Indoor)38 dB(A)
Weight (Indoor Unit)8 kg
Weight (Outdoor Unit)25 kg
Operating Temperature (Cooling)18-43°C
Noise Level (Outdoor)50 dB
Dimensions (Outdoor Unit)700 x 540 x 250 mm

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