
13
■A2 Fault message module 2: Safety equipment 3 ..............................124
■A3 Fault message module 2: Safety equipment 4 ..............................124
■A7 Fault clock module in programming unit ....................................... 124
■AA Configuration fault, TSA function .................................................. 124
■AB Configuration fault, heat exchanger set ........................................ 124
■AC Configuration fault, return temperature control .............................125
■AD Configuration fault, butterfly valve ................................................ 125
■B0 Short circuit, flue gas temperature sensor .................................... 125
■B1 Communication fault, programming unit ....................................... 125
■B5 EEPROM error .............................................................................. 125
■B6 Invalid application ..........................................................................125
■B7 Coding card ...................................................................................126
■B8 Flue gas temperature sensor disconnection ................................. 126
■BA Communication error, PCB extension, HC 2 and HC 3 ................ 126
■BC Communication error, remote control, HC 1 ................................. 126
■BD Communication error, remote control, heating circuit 2 ................ 126
■BE Communication error, remote control, heating circuit 3 ................ 127
■BF Incorrect LON communication module ..........................................127
■C1 External safety equipment on boiler ..............................................127
■C2 Communication error, solar control unit ........................................ 127
■C3 Communication fault, extension AM1 ........................................... 127
■C8 Fault message module 1, input 1: Water level limiter ................... 128
■C9 Fault message module 1, input 2: Max. pressure 1 ...................... 128
■CA Fault message module 1, input 3: Min. pressure or max. pres-
sure 2 ..................................................................................................128
■CB Fault message module 1, input 4: Max. pressure 2 ......................128
■CE Communication error, fault message module 1 ............................ 128
■CF Communication error, LON communication module ..................... 129
■D1 Burner fault, boiler .........................................................................129
■D2 Communication error, fault message module 2 ............................ 129
■D3 Communication error, EA1 extension ........................................... 129
■D4 High limit safety cut-out, boiler ......................................................129
■D5 Cascade: Boiler not responding. ...................................................129
■D6 Fault message at digital input 1, EA1 extension ........................... 130
■D7 Fault message at digital input 2, EA1 extension ........................... 130
■D8 Fault message at digital input 3, EA1 extension ........................... 130
■DA Short circuit, room temperature sensor Vitotrol, HC 1 ..................130
■DB Short circuit, room temperature sensor Vitotrol, HC 2 ..................130
■DC Short circuit, room temperature sensor Vitotrol, HC 3 ..................130
■DD Lead break, room temperature sensor Vitotrol, HC 1 ...................130
■DE Lead break, room temperature sensor Vitotrol, HC 2 ...................131
■DF Lead break, room temperature sensor Vitotrol, HC 3 ................... 131
■E0 LON subscriber fault ... ................................................................. 131
■Faults without a fault display .............................................................. 131
Checking temperature sensors ..............................................................131
■Boiler water, cylinder, flow, return temperature (Therm-Control sen-
sor) sensors and room temperature sensor ....................................... 131
■Outside temperature sensor ............................................................... 132
■Flue gas temperature sensor ..............................................................132
Checking the fuses ................................................................................ 133
11. System function descrip-
tion
System function description ...................................................................134
Boiler water temperature control ............................................................134
■Brief description ..................................................................................134
■Functions ............................................................................................ 134
■Control sequence ............................................................................... 134
Cascade control .....................................................................................135
■Brief description ..................................................................................135
■Set common flow temperature ............................................................135
■Standalone control ..............................................................................136
Index
Index
5863747