What to do if Stulz Air Conditioner shows a fire alarm?
If your Stulz Air Conditioner displays a fire alarm, it means the fire alarm input has been interrupted. You should check the fire alarm system. If there isn't a fire alarm system, bypass the terminal, referring to the circuit diagram for guidance.
What to do if Stulz Air Conditioner shows sensor faulty error?
If your Stulz Air Conditioner displays a sensor faulty error, the measured voltage/current is outside the range defined in the controller. You should check the connections and cable continuity. Also, check the measured value using an external thermometer, hygrostat, or pressure gauge.
What to do if Stulz EC Tower ECD 91 Air Conditioner displays airflow failure 1?
If your Stulz Air Conditioner shows an airflow failure 1, it means there is a fault signal from the airflow differential pressure switch. Check the fan voltage continuity and nominal current, and see if the fan is mechanically jammed. Also, check the air filter and clean the hoses, inspecting for kinks.
How to fix a water alarm on a Stulz EC Tower ECD 91 Air Conditioner?
If your Stulz Air Conditioner displays a water alarm, it indicates a fault signal from the water detector board (B15). Check the sensor for a short-circuit and dry the sensor.
How to fix error in filter 1 in Stulz Air Conditioner?
If your Stulz Air Conditioner shows an error in filter 1, it means there is a fault signal from the differential pressure switch. Clean the filter to resolve this issue.
What to do if Stulz EC Tower ECD 91 displays fan failure 1?
If your Stulz Air Conditioner displays a fan failure 1, there is a fault signal from the airflow differential pressure switch. Close the unit and check the hose.
Why does the master switch symbol appear on my Stulz Air Conditioner display?
The master switch symbol appearing on your Stulz Air Conditioner display indicates that Remote On/Off is enabled. Refer to the circuit diagram and bridge terminals X4/1 and X4/2 in junction box 1.
General| Brand | Stulz |
|---|---|
| Model | EC Tower ECD 91 |
| Category | Air Conditioner |
| Language | English |
Defines the applicability of the technical manual to EC Tower version 07 or later.
Explains the use of signal words and symbols for safety and warning notices.
Provides essential safety information for installation, operation, and maintenance.
Details safety procedures and precautions when handling refrigerants like R410A.
Outlines operator responsibilities according to EN 378 and national regulations.
Lists other essential documents for the EC Tower's installation and operation.
Describes how EC Tower units are packed and what information is on the packaging.
Provides safety instructions and methods for safely moving EC Tower units.
Details measures to protect the unit from damage and corrosion during intermediate storage.
Explains how to interpret the unit's type code found on the rating plate.
Defines the intended use of the EC Tower for regulating room temperature and air humidity.
Lists areas and conditions where the EC Tower must not be used.
Describes the function of the indoor unit components and dehumidification process.
Details the available unit sizes and versions, focusing on sizes 1 and 2.
Explains the function and control of the heater as an integral part of the unit.
Specifies admissible return air, outside air, and storage conditions for operation.
Provides electrical specifications and circuit diagrams for the EC Tower.
Presents dimensional drawings for EC Tower sizes 1 and 2.
Lists operating and connection data for different EC Tower models and versions.
Provides guidelines for choosing an installation location and ensuring proper clearances.
Details the procedure for safely opening the EC Tower unit for installation.
Explains the location and diameter of refrigerant connections for Downflow and Upflow units.
Describes types of condensate drainage and installation requirements.
Refers to the outdoor unit instruction manual for refrigerant circuit installation details.
Guides on checking and ensuring correct feed water conductivity for the steam humidifier.
Details on-site preparations and connecting the steam humidifier to the feed water.
Provides safety instructions and steps for electrically connecting the EC Tower.
Explains how to connect the outdoor unit's electrical supply and signal lines.
Describes how to set DIP switches on various boards for correct unit configuration.
Illustrates the location of key components within junction box 1 for startup.
Provides instructions and settings for circuit-breakers for EC Tower sizes 1 and 2.
Details crucial safety precautions to be followed during maintenance work.
Outlines the recommended maintenance intervals for various EC Tower components.
Covers maintenance procedures for the air circuit, including heat exchanger and filters.
Provides general maintenance checks for electrical and mechanical parts.
Specifies the yearly cleaning procedure for the heater.
Refers to the OEM User Manual for steam humidifier maintenance intervals.
Details the procedure for replacing a faulty solenoid valve coil.
Provides a table of common alarm messages, causes, and remedies for the EC Tower.
Lists potential issues with the heater and their corresponding solutions.
Refers to the OEM User Manual for steam humidifier troubleshooting.
Details troubleshooting steps for water warning system alarms like solenoid valve issues.
Lists available accessories for the EC Tower, categorized by type and model.
Provides safety instructions and procedures for installing the optional condensate pump.
Details the installation of the blow-out plenum for directing airflow in Upflow units.
Explains the installation of the blow-out plinth for Downflow units without raised floors.
Guides on installing a raised floor stand to adapt the unit's height.
Describes mounting the adapter panel for canvas fittings or duct connections.
Details the installation of a flexible canvas fitting between the unit and air duct.
Explains the installation of a louver damper for Upflow units on the blow-out side.
Details the installation of a louver damper for Downflow units on the blow-out side.
Describes the installation of a filtration box for Downflow units connected to an air duct.
Guides the installation of the optional temperature and humidity sensor B03.
Provides safety instructions for installing the water warning system.
Details the installation of Version 1 of the water warning system.
Details the installation of Version 2 of the water warning system.
Explains the installation of the BMS contact for the water warning system.
Covers installation, technical data, and startup procedures for the WIB 8000.
Guides the installation of the RS485 EBUS expansion board for communication.
Describes modifying the unit by replacing the front panel with a front door.
Provides a reference to the CompTrol Interface III k Technical Manual.
Defines the intended audience and scope of this technical manual.
Identifies qualified electricians and specialist planners as the target audience.
Explains the use of signal words and symbols for hazard communication.
Lists and explains common abbreviations used in the manual.
Describes formatting conventions used for emphasis and clarity in the manual.
Provides a list of full names and their shorter designations used in this document.
Defines the intended and proper use of the Interface III k module.
Details critical safety instructions, especially regarding electric shock.
Specifies the necessary skills and qualifications for personnel performing work.
Lists additional documents that must be consulted alongside this manual.
Describes analog inputs, digital inputs/outputs, and the X/Y remote control bus.
Provides a detailed breakdown of terminal designations and their functions.
Explains the function of DIP switch S1 for program selection and settings.
Details how DIP switches S2-1 to S2-8 configure functions and display behavior.
Describes the two-digit 7-segment display and how DIP switches control its output.
Explains analog input evaluation and direct frequency request via 0-10 V DC signal.
Details functions controlled by digital inputs, including analog input evaluation and mode selection.
Covers special functions like forced mode, inversion of digital outputs, and status signals.
Describes compressor frequency adjustment and digital input functions for Program 8.
Provides instructions for setting DIP switches S1 and S2 for Program 8 operation.
Details how to set DIP switches S1-5 to S1-8 for FDC and SRC outdoor units.
Assigns specific functions to digital inputs X2a-D1 through X2c-D6 for Program 8.
Assigns specific functions to digital outputs X4a-K1, X4b-K2, and X4c-K3 for Program 8.
Illustrates the connection diagram for the Interface III k with Program 8.
Describes the initialization phase that occurs upon connecting the Interface III k.
Details the step-by-step process of the Interface III k initialization sequence.
Lists error codes displayed on the 7-segment display for the Interface III k.
Describes error codes displayed for the air conditioning unit without 'E'.
Provides instructions for rebooting the system to resolve communication errors.
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