What should I check if my Toshiba VN-U00351SY-E Fan shows error J14?
To troubleshoot error J14 on your Toshiba Fan, verify that the EA shutter is open when the fan is ON while the Heat recovery ventilation unit is running and check for any obstructions blocking the air passage between RA and EA.
What to do if the damper does not open or close in Toshiba VN-U00351SY-E Fan?
If your Toshiba Fan's damper isn't opening or closing, there might be a few reasons. First, check for loose connections and connect them firmly or replace the assembled connector with a new one. If the coil of the damper motor is broken, you'll need to replace the damper motor. Finally, check for any obstructions on the sliding part and remove them.
Why is the motor not running fast enough on my Toshiba VN-U00351SY-E Fan?
If your Toshiba Fan's motor isn't running fast enough, it could be due to the motor bearing not running smoothly. In this case, replace the motor with a new one.
Why does my Toshiba VN-U00351SY-E Fan start running by itself?
If your Toshiba Fan starts running without you operating the remote controller, it could be because the unit has just recovered from a power failure or you've just turned on the circuit breaker. The settings concerning recovering from power failure or start/stop by power on/ off are set to CODE No. [28] [9D] “ON”. Consult your dealer for details.
What to do if the operation lamp does not turn on in Toshiba VN-U00351SY-E Fan?
If the operation lamp does not turn on, check if the “ ” or “ ” indicator appear on the display. The nighttime heat purge operation or 24-hour ventilation is set to CODE No. [4C] [49] “ON”. See section “6. Control outline No.4 and No.8” for specification outline.
What does error L08 mean on a Toshiba VN-U00351SY-E Fan?
Error L08 on your Toshiba Fan indicates an indoor address setting trouble, meaning the indoor address group has not been set.
What does error E18 mean on my Toshiba VN-U00351SY-E?
Error E18 on your Toshiba Fan indicates an issue with the indoor PC board. Regular communication is not possible between header and follower indoor units, or between twin header (main) and follower (sub) units.
What does error L03 mean on a Toshiba VN-U00351SY-E?
Error L03 on your Toshiba Fan indicates an indoor address setting trouble, meaning there are two or more header units in the group.
What does error E11 mean on my Toshiba Fan?
Error E11 on your Toshiba Fan indicates a communication problem between the Application control kit and the indoor unit. Start by checking the connector on the indoor unit (CN521 (red)) for the Application control kit. Then, check the connection of the indoor-Application control kit communication line. After that, inspect the indoor PC board and the Application control kit PC board.
How to fix communication trouble between control PC board on Toshiba VN-U00351SY-E Fan (Error E10)?
If your Toshiba Fan displays error E10, it indicates a communication issue between the control PC board. First, check the connectors on the indoor unit (CN520 (blue) and CN570 (blue)). Then, inspect the communication line between the indoor unit control PC board and the Branch PC board for UART. Finally, check both the indoor control PC board and the Branch PC board of UART for any defects.
Safety measures during unit operation and maintenance.
Safety guidelines for repairs and unit relocation.
Requirements and warnings for unit installation.
Specific cautions regarding unit installation.
Specific cautions related to operating the unit.
Step-by-step guide to starting and stopping unit operations.
Instructions for adjusting the ventilation fan speed.
Guide to selecting and setting ventilation modes.
Details on the nighttime heat purge function and its operation.
Guide to setting timers for unit operation.
Detailed instructions for setting the Off timer.
Guidance on maintaining the unit's filters and heat exchange element.
Troubleshooting steps to check before contacting service.
Steps to confirm and check for issues using check codes.
This document describes the Toshiba Heat Recovery Ventilation Unit, a concealed microcomputer-controlled system designed for commercial use. It functions to provide efficient and comfortable ventilation while minimizing energy loss and maintaining indoor air quality.
The Heat Recovery Ventilation Unit operates by exchanging heat between incoming outdoor air and outgoing indoor air. This process, known as "Heat exchange mode," helps to bring the temperature and humidity of the outdoor air closer to that of the indoor air before it is supplied into the room, thereby reducing the energy load on air conditioning systems.
In addition to heat exchange, the unit offers a "Bypass mode," which directly introduces outdoor air into the room without heat exchange. This mode is primarily recommended for use during spring and summer when outdoor temperatures are mild. An "Automatic mode" intelligently switches between heat exchange and bypass modes based on indoor and outdoor temperature sensor data. When linked with air conditioners, the automatic mode also considers the air conditioner's operation status (cooling, heating, dry, or fan) to optimize ventilation.
The unit incorporates "Constant input power control" (or "Constant air flow control") for its fan, which helps maintain consistent airflow even when pressure loss increases, such as when filters accumulate dust. This feature ensures stable ventilation performance.
Humidity control is another key function. During cooling, highly humid outdoor air is conditioned to match the humidity of the dehumidified indoor air before supply. Conversely, during heating, moisture from the indoor air is transferred to the dry outdoor air before it is supplied, preventing excessive dryness indoors.
The system also provides sound insulation through its air trunks and heat exchange elements, which reduce the ingress of outdoor noise and the outflow of indoor sounds, contributing to a quieter indoor environment.
The Heat Recovery Ventilation Unit is operated via a wired remote controller, such as the RBC-AW(M)SU5*. The main screen of the remote controller displays the current state of the air, including indoor temperature, indoor humidity, supply air temperature, and outdoor temperature, and allows for setting ventilation fan speed and mode.
Users can select from three ventilation modes: Heat exchange, Bypass, and Automatic. Fan speed can be adjusted to High, Medium, or Low for normal ventilation. Additionally, an unbalanced ventilation fan speed can be set: "Supply air > Exhaust air" to reduce inflow of humidity and smells, or "Supply air < Exhaust air" to reduce outflow of smells and floating bacteria.
The unit supports 24-hour ventilation, which can be activated or temporarily stopped via the remote controller. During 24-hour ventilation, the unit typically runs at a low fan speed in heat exchange mode.
A "Nighttime heat purge operation" is available to reduce the room's air conditioning load in the morning during summer. This function exhausts warm indoor air in bypass mode when the air conditioner is stopped at night. It activates automatically under specific temperature conditions and pauses if conditions are no longer met, resuming when appropriate.
Timer operations include an "Off timer" to stop the unit after a specified period, an "On timer" to start it after a specified period, and an "Off reminder timer" to stop it after a set period each time the unit is used. These timers can be set for up to 168 hours (7 days) with various intervals.
The remote controller also provides a "Ventilation menu" with options to control ventilation operation (ON/OFF), fan speed, mode, 24-hour ventilation off, and schedule timer settings. A schedule timer allows users to program daily or weekly ventilation patterns, including start times, fan speeds, and modes.
The Heat Recovery Ventilation Unit requires regular maintenance, particularly cleaning of the filters and heat exchange elements. The remote controller displays a "Filter sign reset" indicator ("!") to notify users when filter cleaning is due. If the unit continues to operate with the "!" displayed, a "Filter check." message will appear.
After cleaning the air filters, users must perform a "Filter sign reset" through the remote controller's menu to clear the maintenance notification.
For cleaning the remote controller itself, a dry cloth should be used. Harsh chemicals like benzene, thinner, polishing powder, or similar solvents should be avoided as they can damage or deform the plastic surface.
In case of any trouble, such as abnormal sounds, burning smells, water leakage, or error codes displayed on the remote controller, users are advised to turn off the main power supply and contact a qualified service person. The remote controller can display check codes and unit numbers to assist service personnel in diagnosing issues. The "Information" screen on the remote controller also provides access to model information and service contact details.
General| Model | VN-U00351SY-E |
|---|---|
| Category | Fan |
| Brand | Toshiba |
| Voltage | 220-240V |
| Frequency | 50/60 Hz |
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