Basic Display/Fault Stack Fault Messages - Honeywell SDC Service Manual

Hydraulic Components
NOTE
7.4.1
250
The last (most recent) fault message is in first position; the
previous fault messages are shifted down by a position with each
new fault message. The fifth fault message is deleted when a new
fault message appears.
Operating
information
Display of logical
fault messages
Fault memory
inquiry
In the case of condensing systems with automatic stokers, the
outside sensor input can be used to switch off the heating system.
A sensor short-circuit at the outside sensor suppresses a fault
message regarding this and switches off the system. The
message "Heating system off" appears instead of the fault
message in this case.
If a heat generator defect occurs (fault message 30-1 or 31-3) and
system frost protection is active at the same time, boiler start-up
protection is switched off and thus the heating circuit pumps are
started to minimise the danger of system freezing.

Basic display/fault stack fault messages

With connection of an automatic stoker, further fault messages
may arrive from it. They are displayed as follows.
Fault type Fault
code
Water S0-1
pressure
Water S0-5
pressure
Water S0-2
pressure
Ventilation S1-0
Maintenance S2-0
Switch-off –
Service 240-1
Key/Menu
SYSTEM
FAULT MESSAGE
Field 1
Water pressure
Water pressure
Water pressure
Ventilation
Maintenance
Switch-off
Service
SDC / DHC
Parameter
13
ERR-1 . ERR-5
Field 2 Field 3
HIGH
LOW
MIN
OFF
EN2H-0221GE51 R0812