What does Activation of low control mean on Hitachi Air Conditioner?
If your Hitachi Air Conditioner displays 'Activation of low control', inspect system low-pressure conditions. The system stops after P06 retry due to Ps being less than 0.15 MPa for 90 seconds.
What to do if Hitachi YUTAKI S RWM-4.0NE Air Conditioner shows abnormal transmission between outdoor and indoor units?
If your Hitachi Air Conditioner shows 'Abnormal transmission between outdoor and indoor units', check the wiring, terminals, and PCB for faults. This issue can be caused by incorrect wiring, loose terminals, PCB failure, a tripped fuse, or the power supply being OFF.
Why does my Hitachi YUTAKI S RWM-4.0NE 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.
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.
How to troubleshoot Hitachi YUTAKI S RWM-4.0NE hydraulic alarm flow and water pump malfunction?
If your Hitachi Air Conditioner displays a hydraulic alarm related to flow and water pump malfunction, check the water pump for proper operation and repair or replace it if defective. This alarm indicates that water flow is not detected in the hydraulic cycle or the pump is defective.
How to solve Incorrect capacity setting or combined capacity between outdoor and indoor units on Hitachi YUTAKI S RWM-4.0NE Air Conditioner?
If your Hitachi Air Conditioner displays 'Incorrect capacity setting or combined capacity between outdoor and indoor units', ensure proper capacity settings for both units. This is caused by an incorrect Capacity Code Setting, or Excessive or Insufficient Indoor Unit Total Capacity Code.
What does Decrease in discharge gas superheat mean for Hitachi YUTAKI S RWM-4.0NE Air Conditioner?
If your Hitachi Air Conditioner displays 'Decrease in discharge gas superheat', check refrigerant charge and inspect related components. Possible causes are excessive refrigerant charge, failure of thermistor, incorrect wiring, incorrect piping connection, or expansion valve locking at opened position (disconnected connector).
How to solve RF Communication failure on Hitachi YUTAKI S RWM-4.0NE Air Conditioner?
If your Hitachi Air Conditioner shows 'RF Communication failure', check the RF communication setup. This issue occurs when there is no communication for 1 hour with one or two RF receivers which are bound to the RF-Bridge.
What causes Hitachi YUTAKI S RWM-4.0NE Air Conditioner hydraulic alarm pressure?
If your Hitachi Air Conditioner displays 'Hydraulic alarm pressure', check the system for any leaks or blockages affecting water pressure. This alarm indicates that water pressure is not detected in the hydraulic cycle.
How to fix Incorrect PCB Setting in Hitachi YUTAKI S RWM-4.0NE Air Conditioner?
If your Hitachi Air Conditioner shows 'Incorrect PCB Setting', correct the DSW settings. This issue is caused by a wrong DSW setting in the case of Co041.
General| Brand | Hitachi |
|---|---|
| Model | YUTAKI S RWM-4.0NE |
| Category | Air Conditioner |
| Language | English |
Provides crucial danger and caution warnings for safe installation and operation.
Highlights critical reading instructions and general notices for correct system installation and use.
Illustrates refrigerant and hydraulic circuits for YUTAKI S, S COMBI, and S80 split systems.
Shows refrigerant and hydraulic circuits for the YUTAKI M monobloc system.
Discusses refrigerant piping length, size, and precautions for leaks.
Guides through the initial setup process using the Configuration Assistant or Advanced Configuration.
Lists indoor unit alarm codes, retry/stop codes, origin, and detailed abnormalities.
Details outdoor unit alarms, categories, types of abnormalities, and main causes.
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