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Control Unit
GC1
Viessmann GC1 Installation And Service Instructions
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117
T
roubleshooting
F
aults whic
h ar
e displa
yed at the pr
ogr
amming unit
(cont.)
F
ault
code
Syst
em
char
acter
istics
Cause
Remedy
b1
Control mode
Communication
er
ror
Programming unit
Chec
k connections
and replace
programming unit if
necessary (see page
128)
b4
Emissions test
mode
Internal electronics
fault
Chec
k electronics
PCB.
bC5
Control mode
Replace, if required
bC6
Constant mode
In
valid
hardware ID
Set code "92:1
60"
b7
Boiler is regulated
by control
thermostat
Boiler coding card
faulty
Plug in boiler coding
card or replace it, if
faulty (see page 60)
bC8
Control mode
L
ead broken
Flue gas
temperature sensor
Chec
king flue g
as
temperature sensor
(see page 132).
Without flue gas
temperature sensor
Set code "1F:0"
bf
Incorrect L
ON
communication
module
Replace
communication
module
(see page 128)
c1
Boiler cools down
External safety
device
Connection
Chec
k plug
aBÖ
and
external safety
equipment
(see page 84)
c2
Control mode
L
ead broken
KM BUS to solar
control unit
Chec
k KM BUS cable
and solar control unit
Without solar control
unit, set code "54:0"
5862730GB
116
118
Table of Contents
Safety Instructions
2
Table of Contents
4
General Information
6
Product Information
6
Summary of System Versions
7
System Versions 1 to 17
8
System Extension
53
System with Flue Gas/Water Heat Exchanger
55
Installation
57
Summary of Electrical Connections
57
Inserting Cables and Applying Strain Relief
59
Inserting the Boiler Coding Card
60
Changing the High Limit Safety Cut−Out Setting
61
Changing the Control Thermostat Setting
65
Sensor Connection
66
Pump Connection
67
Connecting an Actuator with Three Point Output
68
External Hook−Up in Single Boiler Systems
69
External Hook−Up in Multi−Boiler Systems Without LON
75
External Hook−Up in Multi−Boiler Systems with LON
83
External Connections on Plug Abö
84
Connecting Central Fault Messaging to Plug Gö
85
Plugging in the LON Communication Module
86
Making the LON Connection
87
Pressure−Jet Oil/Gas Burners
89
Connecting an AC Burner
89
Connecting a Three−Phase Burner Zero Volt Safety Chain
92
Connecting a Three−Phase Burner Safety Chain Not Zero Volt
93
Power Supply
94
Installing the Control Unit Front
95
Opening the Control Unit
96
Commissioning
97
Controls and Display Elements
97
Checking the High Limit Safety Cut−Out
98
Integrating the Control Unit into the LON System
98
Carrying out a User Check
100
Matching the Coding Addresses to the System Version
101
Checking Outputs (Actuators) and Sensors
104
Relay Test
104
Service Scans
106
Service Level Summary
106
Temperatures, Boiler Coding Card and Brief Scans
107
Scanning Operating Conditions
109
Scanning and Resetting Maintenance Displays
111
Troubleshooting Faults Which Are Displayed at the Programming Unit
112
Troubleshooting
112
Faults Which Are Displayed at the Programming Unit
112
Downloading Fault Codes from the Fault Memory (Fault History)
121
Function Description
122
Boiler Water Temperature Control
122
Cylinder Temperature Control
124
Components
127
Components from the Parts List
127
Programming Unit
128
Flue Gas Temperature Sensor
132
Boiler Coding Card
133
Function Extension 0−10 V
133
Plug−In Adaptor for External Safety Equipment
135
Vitoair Draught Stabiliser
137
Motorised Flue Gas Damper
138
Coding
139
Resetting Codes to the Delivered Condition
139
Code 1
139
Code 2
141
Burner Switching Hysteresis
151
Parts List
153
Connection and Wiring Diagrams
156
Specification
162
Keyword Index
163
Applicability
168
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Viessmann GC1 Specifications
General
Brand
Viessmann
Model
GC1
Category
Control Unit
Language
English
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