68
Troubleshooting
6 720 617 763 (2008/09)
Fault 29
Unable to save parameter settings
202
BUS device is configured but
not available at present.
Check system layout, check
system configuration, modify
if necessary and reset
parameters on remote con-
trol.
Fault 30
Mixer temperature sensor faulty
7
Mixer temperature sensor (MF)
connected to IPM faulty.
Check mixer temperature
sensor (MF) and replace if
necessary.
Fault 33
Temperature sensors incorrectly connected
22
A temperature sensor is con-
nected to the IUM.
Remove the temperature
sensor and insert a coding
plug if necessary.
Fault 40
Temperature sensor T1 on collector group 1
faulty
101
Short circuit on the sensor
lead (T
1
).
Check temperature sensor
(T
1
) and replace if neces-
sary.
102
Break in the sensor lead (T
1
).
Fault 41
Temperature sensor T2 at bottom of solar
cylinder faulty
103
Short circuit on the sensor
lead (T
2
).
Check temperature sensor
(T
2
) and replace if neces-
sary.
104
Break in the sensor lead (T
2
).
Fault 50
Solar pump jammed or air in system
121
126
140
Solar pump (SP) sticking due
to physical blockage.
Unscrew and remove the
slotted screw on the pump
head and use a screwdriver
to release the pump shaft.
Do NOT strike the pump
shaft with the screwdriver.
Air in solar thermal system.
Bleed solar system and top
up with heat transfer fluid if
necessary.
Fault 51
Incorrect temperature sensor type con-
nected
122
Collector temperature sensor
type used as cylinder tempera-
ture sensor (T
2
).
Use correct type of tempera-
ture sensor.
Æ
Technical
data in ISM installation
instructions.
123
Cylinder temperature sensor
type used as collector temper-
ature sensor (T
1
)
127
Cylinder temperature sensor
type used as collector temper-
ature sensor (TA).
132
Temperature sensor type PTC
1000 used as cylinder temper-
ature sensor (T
2
).
133
Temperature sensor type PTC
1000 used as collector temper-
ature sensor (T
1
).
Fault 52
Temperature sensors reversed
124
Temperature sensors (T
1
and
T
2
) reversed.
Check the temperature sen-
sors and swap the connec-
tions if necessary.
Fault 53
Temperature sensor fitted in wrong location
125
128
Collector temperature sensor
(T
1
) fitted on collector array
inlet.
Fit collector temperature
sensor (T
1
) close to collector
array outlet.
Information displayed (
Æ
Pos. 1, 3 and 4 in fig. 26)
Text
Code
Cause
Remedy (by installer)
Tab. 23
