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Buderus Manuals
Boiler
24C
Servicing manual
Buderus 24C Servicing Manual
Gas wall hung boiler condensing
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Contents
Table of Contents
Troubleshooting
Bookmarks
Table of Contents
Messages - Universal Automatic Burner (UBA)
Table of Contents
1 Messages - Universal Automatic Burner
(Uba)
UBA Status Display
UBA Operating Level 1.5
Service Tool
Operating Messages
Fault Messages
2 Faults that the UBA Does Not Display
C Safety Sensor Exceeds 100 °C
Excessive Temperature Increase at Safety Sensor
Bad Plug-In Connection at Cable Loom, or Damaged Wiring
Feed Sensor above 100 °C
F2 Fuse Malfunction, or Exhaust-Gas Sensor Tripped
F Safety Sensor Exceeds 100 °C
Dripping Tap
L Short Circuit in Safety Sensor
P Safety Sensor, Loose Contact or Defective
Short Circuit in Feed Sensor
Feed Sensor, Loose Contact or Defective
C 600 Series Has Switched off after Disconnection of Diagnosis Plug
F1 Fuse Defective, or no Ionisation Message after Ignition
Ionisation Message, but no Flame
H Flame dies out after Gas Valve Is Opened
Flame Goes out During Warm-Up Phase
Mains Voltage
A Voltage in UBA too Low or too High
Mains Voltage Interrupted Following a Fault Warning Message
F3 Fuse Defect, or UBA System Error
Voltage Peaks in UBA
UBA Timer Error
External Switching Contact, E.g. Temperature Monitor for Floor Heating, Has Been Tripped
System Error
C Incorrect Cable Connection at KIM, or KIM Defective
System Error (UBA Defective)
Wiring to Gas-Burner Assembly Incorrect, or Loose Wiring Connections in UBA
UKIM Defective
P Non-Compatible UBA Fitted
Troubleshooting Tasks
Unblocking the 600 Series 11S / 19S / 24S / 24C
Chimney-Sweep Mode
Removing and Refitting the Outer Casing
Removing and Refitting the Combustion-Chamber Cover
Checking the Exhaust-Gas Sensor
Replacing the Exhaust-Gas Sensor
Checking the Air Intake and Outlet Openings
Replacing the UBA
Checking the Fan
Replacing the Fan
Checking the Wiring Connections of the UBA
Checking the Miniature Fuses
Checking the Connections for the Second Solenoid Valve, Modulating Pump and Floor Thermostat Switching Contact
Checking the Circulation Pump
Replacing the Circulation Pump
Checking the Safety Sensor
Replacing the Safety Sensor
Checking the Safety Sensor Connection Lead
Checking the Feed Sensor
Replacing the Feed Sensor
Checking the Feed Sensor Connection Lead
Checking the Domestic Hot Water
Mains Water Supply
Changing the Domestic Hot Water
Mains Water Supply
Checking the Hot Surface Ingitor
Replacing the Hot Surface Ingitor
Checking the Gas-Burner Control System for Correct Activation
Replacing the Gas Burner Fitting
Checking and Adjusting the Gas-To-Air Ratio
Measuring the Ionisation Current
Replacing the Ionisation Electrode
Checking the Three-Way Motorised Valve for Correct Operation
Replacing the Motorised Valve Body Control Valve
Replacing the Three-Way Valve
Checking the ERC/RC Connections to the UBA
Replacing the Terminal Strip
Checking Connections at the ERC or RC
Replacing the Room-Temperature Control Device
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7210 1300 - 02/2006 GB(EN)
Servicing manual
Gas wall hung boiler condensing
600 Series - 11S / 19S / 24S / 24C
Please read thoroughly before attempting to diagnose fault
For trade use
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Troubleshooting
Troubleshooting
9
Troubleshooting tasks
47
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24s
19s
11s
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