60 Operating and installation instructions 0020288151_04
B.2 Troubleshooting
Code/meaning Possible cause Measure
Ventilation unit communica-
tion interrupted
F.509
The cable is defective ▶ Replace the cable.
Incorrect plug connection ▶ Check the plug connection.
HP control module commu-
nication interrupted
F.511
The cable is defective ▶ Replace the cable.
Incorrect plug connection ▶ Check the plug connection.
Heat generator 1 communica-
tion interrupted (can be heat
generator 1 to 8)
F.1191…F.1195,
F.1200…F.1211,
F.1252…F.1255
The cable is defective ▶ Replace the cable.
Incorrect plug connection ▶ Check the plug connection.
FM3 address 1 communica-
tion interrupted (can be ad-
dress 1 to 3)
F.1212…F.1214
The cable is defective ▶ Replace the cable.
Incorrect plug connection ▶ Check the plug connection.
FM5 communication interrup-
ted
F.1218
The cable is defective ▶ Replace the cable.
Incorrect plug connection ▶ Check the plug connection.
Remote control 1 communic-
ation interrupted (can be ad-
dress 1 to 3)
F.1219…F.1222
The batteries in the radio
remote control are flat
▶ Replace all of the batteries (→ Operating and installation in-
structions for the radio remote control).
Domestic hot water station
communication interrupted
F.1227
The cable is defective ▶ Replace the cable.
Incorrect plug connection ▶
Check the plug connection.
Solar pump station commu-
nication interrupted
F.1228, F.1229
The cable is defective ▶ Replace the cable.
Incorrect plug connection ▶ Check the plug connection.
Internet module communica-
tion interrupted
F.900
The cable is defective ▶ Replace the cable.
Incorrect plug connection ▶ Check the plug connection.
Outdoor temperature sensor
signal invalid
F.521
Outdoor temperature sensor
defective
▶ Replace the outdoor temperature sensor.
FM3 configuration [1] not cor-
rect (can be address 1 to 3)
F.1231…F.1233
Incorrect set value for the FM3 ▶ Set the correct set value for the FM3.
Mixer module not supported
F.1237
Unsuitable module connected ▶ Install a module that the control supports.
Solar module not supported
F.1238
Unsuitable module connected ▶ Install a module that the control supports.
Remote control not supported
F.1239
Unsuitable module connected ▶ Install a module that the control supports.
Basic system diagram code
not correct
F.1240
Incorrectly selected basic sys-
tem diagram code
▶ Set the correct basic system diagram code.
FM3 missing
F.1244
Missing FM3 ▶ Connect the FM3.
DHW temperature sensor S1
missing at FM3
F.1245
Domestic hot water temperature
sensor S1 not connected
▶ Connect the domestic hot water temperature sensor to the
FM3.
Solar pump 1 reports faults
(can be solar pump 1 or 2)
F.1246, F.1247
Fault in the solar pump ▶ Check the solar pump.
Shift-load cylinder not sup-
ported
F.1248
Unsuitable cylinder connected ▶ Remove the cylinder from the heating installation.
HP control module MO2 con-
figuration not correct
F.1249
Incorrectly connected FM3 1. Remove the FM3.
2. Select a suitable configuration.
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