What to do if the red LED is on the Hitachi ATW-RTU-02 RF Receiver?
If the red LED is illuminated on the RF Receiver, it indicates a loss of communication with the Room Unit. This can happen if the RF signal is obstructed due to the Room Unit's placement, or if the Room Unit's batteries are depleted. Try relocating the Room Unit as described in section 2. Also, replace the batteries in the Room Unit.
Why does Hitachi ATW-RTU-02 Thermostat RF Receiver not react to setpoint changes?
The RF Receiver might not be responding to setpoint adjustments from the Room Unit if they aren't properly connected, or if the installer parameter 8:Su hasn't been configured correctly. Ensure the 8:Su parameter is correctly set. Reset the RF Receiver by holding the push button for 15 seconds, then re-establish the connection following the procedure in section 4.
How to fix a flashing red LED after binding Hitachi ATW-RTU-02 Thermostat RF Receiver?
A persistent flashing red LED after the binding procedure suggests an incorrect or incomplete binding, or the Room Unit was positioned incorrectly during binding. Repeat the binding procedure, maintaining approximately 1 meter of distance between the RF Receiver and the Room Unit.
Instructions for installing the RF Receiver unit, including warnings and notes on components and wiring.
Steps for installing the Room Unit, including battery setup and date/time configuration.
Explains RF communication loss indicators on the RF Receiver LED and corresponding fault types.
Procedure to access and navigate Installer Mode for system settings and special features.
Defines system behavior during RF communication loss, like frost protection setpoints.
Details how the Room Unit functions with different systems like standard boilers vs. System Controllers.
Description and enablement of special features like heating/cooling, auto time change, and temperature limits.
Lists and explains configurable parameters for Room Unit and System settings, including default values.
Provides a guide to common symptoms, possible causes, and remedies for system faults.
Explains how to access diagnostic mode for viewing unit information and checking system status.
General| Category | Thermostat |
|---|---|
| Model | ATW-RTU-02 |
| Voltage | 24 VAC |
| Display | LCD |
| Compatibility | Hitachi air conditioners |
| Temperature Range | 5°C to 35°C |
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