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Building Technologies Boiler Sequence Controller RMK770 CE1P3132en
HVAC Products 14 Communication 23.04.2009
14.6 Fault handling
The RMK770 controller has maximum 1 heating circuit and 1 time switch. Index 1
indicates that the fault occurred on this plant.
Number Text Effect
5000 No bus power supply No bus power supply.
Urgent message; must not be acknowl-
edged
Number Text Effect
5001 System time failure Clock time master is missing or cannot be
received.
Nonurgent message; must not be acknowl-
edged
5002 >1 clock time master There is more than 1 clock time master
present.
Nonurgent message; must be acknowledged
5003 Invalid time of day
Time of day on the clock time master must
be readjusted. Reserve has elapsed.
Nonurgent message; must not be acknowl-
edged
Number Text Effect
5101 Syst time switch failure
plant 1
Time switch master is missing or cannot be
received.
Nonurgent message; must not be acknowl-
edged
5102 >1 time switch in plant 1 More than 1 time switch master in the same
geographical zone.
Nonurgent message; must be acknowledged
Number Text Effect
5201 Hol/spec day program
failure
Holidays/special day program master is
missing or cannot be received.
Nonurgent message; must not be acknowl-
edged
5202 >1 hol/spec day program
More than 1 holidays/special day master.
Nonurgent message; must be acknowledged
Number Text Effect
5401 Room master failure in
plant 1
Room master for the room control combina-
tion is missing or cannot be received.
Nonurgent message; must not be acknowl-
edged
5402
>1 room master [1]
>1 room master for plant 1 in the same
geographical zone.
Nonurgent message; must be acknowledged
Bus power supply fault
Clock time fault
System time switch fault
Fault in connection with
holidays / special day
program
Room master and zone
fault in heating circuit 1
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