Armstrong World Industries EHU-701, EHU-700 Series, EHU-703, EHU-704 manual C09 I/O Diagnostics

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C09: I/O DIAGNOSTICS

If the display mode selection is left in the diagnostic mode for 10 seconds, the Input/Output circuit diagnostic check will begin. The display will show the message C09, the tank will be off, and the diagnostics mode light will remain on.

Output Circuits: The diagnostics will first check all the output circuits: fill valve, drain valve, and tank contactor to make sure they are working. When a light comes on, you will hear the corresponding valve or contactor circuit energize for about 2 seconds. Each circuit is checked twice before proceeding to the next circuit.

Input Circuits: Next the microcontroller checks the status of all input circuits, beginning with the control stat. the 3 digit display will show 0% Demand, then the actual stat demand. It will do this twice. The input diagnostics continues by checking the fan interlock switch, high limit duct humidistat, and high water switch. The display will now show C09 followed by any additional messages that indicate problems with the input circuits.

When the I/O diagnostic check is finished, the demand mode light will be on, the display will show the control stat demand and the unit will return to normal operation. The complete I/O diagnostic check lasts less than 2 minutes.

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Contents Installation and Maintenance Metal Tools Away from These Areas Table of Contents Check Local Codes PRE-INSTALLATIONCheck Shipment Site SelectionWater Total Mounting the Humidifier InstallationElectrical Service Wiring Important Please observe the followingWater Fill Supply Connect DrainPressure in duct is high, see Figure Control Wiring Control Humidistat10 Ft Wall Mounted Control HumidistatDuct Mounted Control Humidistat Airflow SwitchHigh Limit Duct Humidistat Audible Alarm Generator aInstrument Panel Before Turning on the Power START-UP Procedure for Armstrong Series EHU-700 HumidifiersTurn on Power AT the Circuit Breaker Page Page Troubleshooting Guide Tank Contactor Operation Operational GuidelinesMonitoring Stat Demand Monitoring Current Monitoring % PowerManual Drain Mode Automatic Drain OperationC02 Tank Needs Cleaning EHU-700 DiagnosticsDiagnostic Display Messages C00 Normal Operation C01 High WaterC06 Fill System Failure C04 High Limit CircuitC05 Drain System Failure C07 Overcurrent FailureC09 I/O Diagnostics Water Quality and Treatment for EHU Series Humidifiers When Water Conductivity is TOO LOWGeneral Remedy When Water Conductivity is TOO HighResults RemediesSteam Generator Parts Valves and Mechanical Parts Electrical Parts EHU-700 Parts List Steam Generator Maintenance MaintenanceRecommended Maintenance Schedule To 2 Days After Start UP Month to 1 YearTank Removal and Replacement ALL Models Steam Generator Chemical Cleaning Procedure Page Tank DISASSEMBLY, CLEANING, and Electrode Replacement Models EHU-703 and 704, Single and Three PhaseFill and Drain System Repair Model EHU-701, Single and Three PhaseDrain System Failure Fill System Failure Humidistat Data Autocal ProcedureSpecifications Sensor Failure ProtectionDimensions Sensor CharacteristicsHumidity SET Point Reset by Outside Temperature AIR Supply High Limit Humidity SensorApplication Example Humidistat model number H270-69-13-10-31Dimensional Information

EHU-701, EHU-700 Series, EHU-704, EHU-703 specifications

Armstrong World Industries has long been a leader in the ceiling and wall solutions industry, and its EHU-700 Series exemplifies the commitment to innovation and quality. The EHU-700 Series, which includes models such as the EHU-703, EHU-704, and EHU-701, is designed for a variety of commercial applications, combining aesthetic appeal with superior performance characteristics.

One of the key features of the EHU-700 Series is its exceptional acoustic control. The panels are crafted using advanced sound-absorbing materials that effectively reduce noise levels in busy environments. This makes them ideal for areas such as offices, schools, and healthcare facilities, where quietness can significantly enhance productivity and comfort. The EHU-700 Series has been rigorously tested and certified to meet stringent industry standards, ensuring its effectiveness in noise reduction.

Additionally, these ceiling panels are designed with durability in mind. Made from high-quality components, the EHU-700 Series is resistant to moisture and staining, making them suitable for spaces exposed to humidity, such as kitchens and restrooms. This resilience ensures that the panels maintain their aesthetic appeal over time, reducing maintenance costs for facility managers.

The EHU-700 Series also incorporates Armstrong's innovative technologies to enhance ease of installation and flexibility. The panels feature a lightweight design, allowing for straightforward handling and installation. Compatibility with various grid systems ensures that the EHU-700 Series can be easily integrated into existing architectural designs, providing a seamless finish.

Another significant aspect of the EHU-700 Series is its commitment to sustainability. Armstrong World Industries emphasizes eco-friendly manufacturing processes and materials, allowing architects and builders to achieve green building certifications, such as LEED. The use of recyclable materials in the panel composition reflects a commitment to reducing the environmental footprint.

In summary, the EHU-700 Series, including the EHU-703, EHU-704, and EHU-701 models, showcases Armstrong World Industries' dedication to quality and innovation. With unparalleled acoustic performance, durability, installation convenience, and sustainability, these ceiling panels are ideal for a wide array of commercial environments, proving to be a valuable investment for modern architectural needs. Their combination of functionality and design ensures that they meet the demands of today's dynamic spaces.
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