Honeywell SDC Service Manual page 247

SDC / DHC
Fault messages
Fault status Designation
(RSC/RS)
System Room sensor
(RSC/RS)
System Burner 1
System Burner 1
System Burner 2
System Burner 2
System Heat meter
System Flue gas
temperature
System Flue gas
temperature
logical Boiler temperature Not reached
logical Tank temperature
logical MC1 flow
temperature:
logical MC2 flow
temperature
logical Room temperature
HC
logical MC1 room
temperature
logical MC2 room
temperature
System Address
System Activity
System EEPROM
System EEPROM defect
System Pulse input fault
System Fault
EN2H-0221GE51 R0812
Fault type Fault object
code
Short-circuit 20-1
No switch-off 30-2
No switch-on 30-3
No switch-off 31-2
No switch-on 31-3
No pulse 32-3
Overshoot 33-5
STL triggered 33-8
50-4
Not reached 51-4
Not reached 52-4
Not reached 53-4
Not reached 54-4
Not reached 55-4
Not reached 56-4
Address 70-0
collision
No T2B signal 70-1
71-0
71-1
No signal 90-0
Lock EnXX
Hydraulic Components
Remark
Fault message if no
signal after 5 minutes
Automatic stoker fault
247