Honeywell SDC 12-31, Service Manual, Page: 245 / 258

SDC / DHC Hydraulic Components
EN2H-0221GE51 R0808 245
Fault messages
Fault status Designation Fault type Fault object
code Remark
(RSC/RS)
System Room sensor
(RSC/RS) Short-circuit 20-1
System Burner 1 No switch-off 30-2
System Burner 1 No switch-on 30-3
System Burner 2 No switch-off 31-2
System Burner 2 No switch-on 31-3
System Heat meter No pulse 32-3
System Flue gas
temperature
Overshoot 33-5
System Flue gas
temperature
STL triggered 33-8
logical Boiler temperature Not reached 50-4
logical Tank temperature Not reached 51-4
logical MC1 flow
temperature: Not reached 52-4
logical MC2 flow
temperature Not reached 53-4
logical Room temperature
HC Not reached 54-4
logical MC1 room
temperature Not reached 55-4
logical MC2 room
temperature Not reached 56-4
System Address Address
collision 70-0
System Activity No T2B signal 70-1
System EEPROM 71-0
System EEPROM defect 71-1
System Pulse input fault No signal 90-0 Fault message if no
signal after 5 minutes
System Fault Lock EnXX Automatic stoker fault