Viessmann VITOTRONIC 100 GC1B Service Manual Page 101
- Page / 132
- Table of contents
- TROUBLESHOOTING
- BOOKMARKS
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Troubleshooting
101
Diagnosis (continued)
Faults with fault display on the programming unit (continued)
F
a
u
l
t
code in
display
Behaviour of system
Cause of fault Action
30
Burner is switched on and off by
the adjustable high limit
Short circuit
Boiler temperature sensor
Check boiler temperature sensor (see
page 42)
38
Burner is switched on and off by
the adjustable high limit
Open circuit
Boiler temperature sensor
Check boiler temperature sensor (see
page 42)
50
DHW pump ON:
set-point boiler temperature =
set-point DHW tank temperature,
priority controls are cancelled
or
In conjunction with DHW heating:
Tank heating is switched on and off
by Tank temperature sensor 2
Short circuit
DHW tank temperature sensor 1
Check DHW tank temperature sensor
(see page 43)
51
In conjunction with DHW heating:
Tank heating is switched on and off
by Tank temperature sensor 1
Short circuit
DHW tank temperature sensor 2
Check DHW tank temperature sensor
(see page 43)
58
DHW pump ON:
set-point boiler temperature =
set-point DHW tank temperature,
priority controls are cancelled
or
In conjunction with DHW heating:
Tank heating is switched on and off
by Tank temperature sensor 2
Open circuit
DHW tank temperature sensor 1
Check DHW tank temperature sensor
(see page 43)
59
In conjunction with DHW heating:
Tank heating is switched on and off
by DHW tank temperature sensor 1
Open circuit
DHW tank temperature sensor 2
Check DHW tank temperature sensor
(see page 43)
60
No output reduction
Return control open
Boiler with maximum temperature
Short circuit
Temperature sensor aJA
Check temperature sensor
(see page 44)
68
No output reduction
Return control open
Boiler with maximum temperature
Open circuit
Temperature sensor aJA
Check temperature sensor
(see page 44)
7
0
Shunt pump ON continuously
Short circuit
T
e
m
p
e
r
a
t
u
r
e
s
e
n
s
o
r
a
J
B
Check temperature sensor
(
s
e
e
p
a
g
e
4
4
)
7
0
In conjunction with DHW heating:
Mixing valve of primary circuit
closed, no domestic hot water
heating
S
h
o
r
t
c
i
r
c
u
i
t
Temperature sensor aJB
C
h
e
c
k
t
e
m
p
e
r
a
t
u
r
e
s
e
n
s
o
r
(see page 44)
7
8
Shunt pump ON continuously
Open circuit
T
e
m
p
e
r
a
t
u
r
e
s
e
n
s
o
r
a
J
B
Check temperature sensor
(
s
e
e
p
a
g
e
4
4
)
7
8
In conjunction with DHW heating:
Mixing valve of primary circuit
closed, no domestic hot water
heating
O
p
e
n
c
i
r
c
u
i
t
Temperature sensor aJB
C
h
e
c
k
t
e
m
p
e
r
a
t
u
r
e
s
e
n
s
o
r
(see page 44)
5351 338 v1.6
- Installation and 1
- Service Instructions 1
- VITOTRONIC 100, GC1 1
- General information 2
- Product Information 4
- General Information 5
- Heating System Types 5
- Start-up 6
- Scanning Service Information 6
- Troubleshooting 6
- Functional Description 6
- Additional Information 6
- Circuit Diagram 1 8
- Circuit Diagram 1 (continued) 9
- Circuit Diagram 2 10
- Circuit Diagram 3 11
- Circuit Diagram 3 (continued) 12
- Circuit Diagram 4 13
- Circuit Diagram 4 (continued) 14
- Circuit Diagram 5 15
- Circuit Diagram 5 (continued) 16
- Circuit Diagram 6 17
- Circuit Diagram 6 (continued) 18
- Circuit Diagram 7 19
- Circuit Diagram 7 (continued) 20
- Circuit Diagram 8 21
- Circuit Diagram 8 (continued) 22
- Circuit Diagram 9 23
- Circuit Diagram 9 (continued) 24
- Circuit Diagram 10 25
- Heating system types 26
- IMPORTANT 26
- Circuit Diagram 11 27
- Circuit Diagram 12 29
- Circuit Diagram 13 31
- Circuit Diagram 14 (CM2 only) 33
- Circuit Diagram 15 (CM2 only) 35
- Installation 37
- Sensor Connection 49
- (CM2 only) 72
- Procedure (overview) 84
- Steps (continued) 86
- Overview of Service Levels 92
- Scanning service information 93
- Troubleshooting Steps 99
- Diagnosis 100
- Diagnosis (continued) 101
- Boiler Temperature Control 105
- Heating Circuit Control 106
- DHW Tank Temperature Control 106
- Functional description 107
- Overview 108
- Technical Data 109
- System Components 109
- System Components (continued) 110
- Coding 1 115
- Coding 1 (continued) 116
- Coding 2 117
- Coding 2 (continued) 118
- Coding 2 ((continued) 119
- Wiring Diagrams 125
- Wiring Diagrams (continued) 126
- GC1 Series 130
- Parts List 131
- Additional information 132
- Quick Reference 132
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