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120

Troubleshooting

Faults which are displayed at the programming unit (cont.)

LON users fault messages

Only if the control unit is the fault manager (code "79:1").

Fault

code

System

characteristics

Cause Remedy

Control mode A user fault has

occurred, e.g. 12

(Vitotronic050)

Download fault code

to user

Installation

and service

instructions

of the

relevant

control unit

No connection to

the user

 Check coding

(see page99)

 Check connecting

LON cable

 Update user list

(see page99)

 Carrying out a

user check

(see page100)

5862730GB

Safety Instructions2
Table of Contents4
General Information6
Product Information6
Summary of System Versions7
System Versions 1 to 178
System Extension53
System with Flue Gas/Water Heat Exchanger55
Installation57
Summary of Electrical Connections57
Inserting Cables and Applying Strain Relief59
Inserting the Boiler Coding Card60
Changing the High Limit Safety Cut−Out Setting61
Changing the Control Thermostat Setting65
Sensor Connection66
Pump Connection67
Connecting an Actuator with Three Point Output68
External Hook−Up in Single Boiler Systems69
External Hook−Up in Multi−Boiler Systems Without LON75
External Hook−Up in Multi−Boiler Systems with LON83
External Connections on Plug Abö84
Connecting Central Fault Messaging to Plug Gö85
Plugging in the LON Communication Module86
Making the LON Connection87
Pressure−Jet Oil/Gas Burners89
Connecting an AC Burner89
Connecting a Three−Phase Burner Zero Volt Safety Chain92
Connecting a Three−Phase Burner Safety Chain Not Zero Volt93
Power Supply94
Installing the Control Unit Front95
Opening the Control Unit96
Commissioning97
Controls and Display Elements97
Checking the High Limit Safety Cut−Out98
Integrating the Control Unit into the LON System98
Carrying out a User Check100
Matching the Coding Addresses to the System Version101
Checking Outputs (Actuators) and Sensors104
- Relay Test104
Service Scans106
Service Level Summary106
Temperatures, Boiler Coding Card and Brief Scans107
Scanning Operating Conditions109
Scanning and Resetting Maintenance Displays111
Troubleshooting Faults Which Are Displayed at the Programming Unit112
Troubleshooting112
Faults Which Are Displayed at the Programming Unit112
Downloading Fault Codes from the Fault Memory (Fault History)121
Function Description122
Boiler Water Temperature Control122
Cylinder Temperature Control124
Components127
Components from the Parts List127
- Programming Unit128
Flue Gas Temperature Sensor132
Boiler Coding Card133
Function Extension 0−10 V133
Plug−In Adaptor for External Safety Equipment135
Vitoair Draught Stabiliser137
Motorised Flue Gas Damper138
Coding139
Resetting Codes to the Delivered Condition139
Code 1139
Code 2141
Burner Switching Hysteresis151
Parts List153
Connection and Wiring Diagrams156
Specification162
Keyword Index163
Applicability168

Brand	Viessmann
Model	GC1
Category	Control Unit
Language	English

Viessmann GC1 Installation And Service Instructions

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Viessmann GC1 Specifications

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