Viessmann Vitotronic 100 GC1, Инструкция по установке и обслуживанию, Страница: 101 / 132

Troubleshooting
101
Diagnosis
(continued)
Faults with fault display on the programming unit (continued)
Fault
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 50)
38
Burner is switched on and off by
the adjustable high limit Open circuit
Boiler temperature sensor Check boiler temperature sensor (see
page 50)
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 51)
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 51)
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 51)
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 51)
60 No output reduction
Return control open
Boiler with maximum temperature
Short circuit
Temperature sensor
aJ A
Check temperature sensor
(see page 52)
68 No output reduction
Return control open
Boiler with maximum temperature
Open circuit
Temperature sensor
aJ A
Check temperature sensor
(see page 52)
70
Shunt pump ON continuously Short circuit
Temperature sensor
aJ B
Check temperature sensor
(see page 52)
70
In conjunction with DHW heating:
Mixing valve of primary circuit
closed, no domestic hot water
heating
Short circuit
Temperature sensor
aJ B
Check temperature sensor
(see page 52)
78
Shunt pump ON continuously
Open circuit
Temperature sensor
aJ B
Check temperature sensor
(see page 52) 78
In conjunction with DHW heating:
Mixing valve of primary circuit
closed, no domestic hot water
heating
Open circuit
Temperature sensor
aJ B
Check temperature sensor
(see page 52)
5
3
5
1
3
3
8
v
1
.8