Related Manuals for Buderus 24S
Summarization of Contents
Preface
Important general instructions for use
Essential guidance for safe and correct operation of the boiler.
Subject to technical modifications
Document may contain minor differences due to ongoing product development.
benchmark Log Book
Information about the installation, commissioning, and service record log book.
Messages – Universal Automatic Burner (UBA)
1.1 UBA status display
Explains how operational status and error messages are shown on the UBA display.
1.2 UBA operating level 1.5
Details the UBA operating level 1.5 and its key components.
1.3 Service tool
Describes the purpose and connection of the service tool for fault diagnosis.
1.4 Operating messages
Lists and explains the various operating messages displayed by the UBA.
1.5 Fault messages
Lists and explains fault messages, including troubleshooting flow diagram references.
Faults that the UBA does not display
Hot-water mode
Addresses issues where the UBA is ready but no hot water is produced.
Heating mode
Addresses issues where the boiler fails to go into heating mode despite readiness.
Troubleshooting
Troubleshooting tasks
General advice and procedures for systematic fault diagnosis.
Unblocking the 600 Series 11S/19S/24S / 24C
Procedure to reset and unblock the UBA after a fault.
Chimney-sweep mode
Instructions for operating the boiler in chimney-sweep mode for specific tasks.
Removing and refitting the outer casing
Step-by-step guide to remove and reinstall the boiler's outer casing.
Removing and refitting the combustion-chamber cover
Steps for removing and reinstalling the combustion-chamber cover.
Checking the exhaust-gas sensor
Method for checking the functionality of the exhaust-gas sensor.
Replacing the exhaust-gas sensor
Procedure for replacing a defective exhaust-gas sensor.
Checking the air intake and outlet openings
Ensures air intake and outlet openings are clear and unobstructed.
Replacing the UBA
Detailed steps for replacing the Universal Automatic Burner (UBA).
Checking the fan
How to check if the fan is operating correctly and receiving power.
Replacing the fan
Step-by-step guide for replacing the fan unit.
Checking the wiring connections of the UBA
Verifying the tightness and correctness of UBA cable connections.
Checking the miniature fuses
Procedure for checking and replacing miniature fuses on the UBA.
Checking the connections for the second solenoid valve, modulating pump and floor thermostat switching contact
Verifying connections for critical components like solenoid valves and pumps.
Checking the circulation pump
How to check if the circulation pump is running and operational.
Replacing the circulation pump
Procedure for replacing a faulty circulation pump.
Checking the safety sensor
Method to check the resistance and temperature reading of the safety sensor.
Replacing the safety sensor
Step-by-step guide for replacing the safety sensor.
Checking the safety sensor connection lead
Verifying the integrity of the wiring to the safety sensor.
Checking the feed sensor
Method to check the resistance and temperature reading of the feed sensor.
Replacing the feed sensor
Procedure for replacing a faulty feed sensor.
Checking the feed sensor connection lead
Verifying the integrity of the wiring to the feed sensor.
Checking the domestic hot water / mains water supply
Measuring resistance of the hot water/mains water sensor against temperature.
Changing the domestic hot water / mains water supply
Procedure for replacing the hot water/mains water sensor.
Checking the hot surface ingitor
Method to check the hot surface ignitor for free throughput.
Replacing the hot surface ingitor
Step-by-step guide for replacing the hot surface ignitor.
Checking the gas-burner control system for correct activation
Verifying the correct voltage output of the gas burner control system.
Replacing the gas burner fitting
Procedure for replacing the gas burner fitting.
Checking and adjusting the gas-to-air ratio
How to check and adjust the gas-to-air ratio for optimal combustion.
Measuring the ionisation current
Procedure to measure the ionisation current for flame detection.
Replacing the ionisation electrode
Step-by-step guide for replacing the ionisation electrode.
Checking the three-way motorised valve for correct operation
Verifying the correct operation of the three-way motorised valve.
Replacing the motorised valve body control valve
Procedure for replacing the control valve of the motorised three-way valve.
Replacing the three-way valve
Step-by-step guide for replacing the three-way valve unit.
Checking the ERC/RC connections to the UBA
Verifying correct connections for external room controllers (ERC/RC) to the UBA.
Replacing the terminal strip
Instructions for replacing the terminal strip for cable connections.
Checking connections at the ERC or RC
Checking controller device connections and expected DC voltage.
Replacing the room-temperature control device
Procedure for replacing the room-temperature control device.
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