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Building Technologies
HVAC Products
14 Fault tracing support
If a fault is displayed, it is always practical to select operating line Faults > Faults current
and look for any pending fault status messages before starting to rectify faults. If an
extension module is faulty, that fault must always be rectified first because it may lead
to a number of subsequential fault status messages.
14.1
Error code list
The RMK770 has maximum 1 heating circuit and 1 time switch. Index 1 indicates that
the sensor error occurred on this plant.
Number
Name
10
Outside temp sensor
error
11
>1 outside tempera-
ture sensor
12
Outs sensor simula-
tion active
[HC 1] flow sensor
50
error
[HC 1] return sensor
51
error
57
Prim controller error
flow sensor
58
Prim controller error
ret sensor
60
Room sensor error
plant 1
61
>2 room sensors in
plant 1
[Boiler 1] boiler
301
sensor error
302
[Boiler 2] boiler
sensor error
303
[Boiler 3] boiler
sensor error
304
[Boiler 4] boiler
sensor error
305
[Boiler 5] boiler
sensor error
Boiler Sequence Controller RMK770
14 Fault tracing support
Possible cause, remarks
Outside temperature sensor not connected, bus
communication interrupted.
Outside temperature zone not correctly set
(transmitter and receiver must have the same
outside temperature zone).
Backup value is 0 °C.
Nonurgent message; must not be acknowledged
More than 2 outside temperature sensors in the
same outside temperature zone.
Urgent message; must be acknowledged
Simulation of the outside temperature is still ac-
tive. Simulation of the outside temperature may
only temporarily stay active.
Nonurgent message; must not be acknowledged
Nonurgent message; must be acknowledged
Error return temperature sensor heating circuit 1.
Nonurgent message; must be acknowledged
Error primary controller flow temperature sensor.
Nonurgent message; must be acknowledged
Error primary controller return temperature sen-
sor.
Nonurgent message; must be acknowledged
Error room temperature sensor plant 1.
Nonurgent message; must not be acknowledged
More than 2 room temperature sensor for plant 1
in the same geographical zone.
Urgent message; must be acknowledged
Error boiler sensor boiler 1
Error boiler sensor boiler 2
Error boiler sensor boiler 3
Error boiler sensor boiler 4
Error boiler sensor boiler 5
CE1P3132en
01.03.2005
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