Potterton EC three 125, Installation, Operation And Maintenance Manual, Page: 141 / 148

9.13 Fault code table
The following is the fault code table. In case of further displayed fault codes,
please inform the heating specialist.
Fault
code Fault description Explanations/causes
0 No error
10 Outside temp sensor fault Connection or AT-sensor, emergency operation
20 Boiler temperature 1 Sensor fault
Check connection, inform heating specialist
1)
25 Boiler temperature solid fuel sensor fault
26 Boiler temperature solid fuel sensor fault
28 Boiler temperature solid fuel sensor fault
30 Flow temperature 1 Sensor fault
32 Flow temperature 2 Sensor fault
Check connection, inform heating specialist
1)
38 Boiler temperature solid fuel sensor fault
40 Return temperature 1 Sensor fault
Check connection, inform heating specialist
1)
46 Boiler temperature solid fuel sensor fault
47 Common return temp sensor fault
50 DHW temperature 1 sensor fault Check connection, inform heating specialist, emergency
operation
1
52 DHW temperature 2 sensor fault
Check connection, inform heating specialist
1)
54 Flow temperature DHW sensor fault
57 Drinking water circulation temperature sensor
fault
60 Room temperature 1 sensor fault
65 Room temperature 2 sensor fault
68 Room temperature 3 sensor fault
70 Storage tank temp 1 (top) sensor fault
71 Storage tank temp 2 (bottom) sensor fault
72 Storage tank temp 3 (middle) sensor fault
73 Collector temperature 1 sensor fault
81 LPB short-circuit or no bus power supply
82 LPB Address collision Check addresses of connected control modules
83 BSB-wire short/circuit Check connection of the room units
84 BSB Address collision 2 room devices have the same allocation (Prog.-Nr. 42)
85 BSB-radio communication fault
91 EEPROM fault: information of locking mechanism Internal fault LMS, process sensor, replace LMS, heating
specialist
98 Expansion module 1 fault (collective fault)
99 Expansion module 2 fault (collective fault)
100 Two time masters (LPB) Check time master
102 Clock time master without backup
105 Servicing message See maintenance code (press information button once)
for detailed information
109 Boiler temperature monitoring
Maintenance
7308536-02 06.13 Condensing gas boiler Eurocondense three125-300 kW 141