Troubleshooting
82
Diagnosis
(continued)
Faults with fault display on the programming unit
(continued)
Fault code
in display
Behaviour of system
Cause of fault
Action
60
Boiler with maximum temperature
No output reduction
Return control open
Short circuit
Temperature sensor
aJ
A
Check temperature sensor
(see page 102)
68
Boiler with maximum temperature
No output reduction
Return control open
Open circuit
Temperature sensor
aJ
A
Check temperature sensor
(see page 102)
70
Shunt pump ON continuously
Short circuit
Temperature sensor
aJ
B
Check temperature sensor
(see page 102)
In conjunction with DHW tank
loading system:
Mixing valve of primary circuit
closed.
No domestic hot water heating
78
Shunt pump ON continuously
In conjunction with DHW tank
loading system:
Mixing valve of primary circuit
closed.
No domestic hot water heating
Open circuit
Temperature sensor
aJ
B
Check temperature sensor
(see page 102)
92
Controlled operation
Only the solar control fault codes are
displayed
Short circuit
Collector temperature sensor S1
on the Vitosolic
Check sensor on the solar
control
93
Controlled operation
Only the solar control fault codes are
displayed
Short circuit
Temperature sensor S3 on the
Vitosolic
Check sensor on the solar
control
94
Controlled operation
Only the solar control fault codes are
displayed
Short circuit
Collector temperature sensor S2
on the Vitosolic
Check sensor on the solar
control
9a
Controlled operation
Only the solar control fault codes are
displayed
Open circuit
Collector temperature sensor S1
on the Vitosolic
Check sensor on the solar
control
9b
Controlled operation
Only the solar control fault codes are
displayed
Open circuit
Temperature sensor S3 on the
Vitosolic
Check sensor on the solar
control
9c
Controlled operation
Only the solar control fault codes are
displayed
Open circuit
DHW tank temperature sensor S2
on the Vitosolic
Check sensor on the solar
control
9f
Controlled operation
Only the solar control fault codes are
displayed
Fault on solar control message
will display if no fault code is
assigned to the fault
Check the solar control
5285
941
-
0
1
