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Siemens Switzerland Ltd
User manual RVS61.843 CE1U2355en_02
HVAC Products 6 The settings in detail 23. November 2007
• Slave with remote adjustment: The time of day on the controller can be readjusted;
at the same time, the system time is readjusted since the change is adopted from the
master.
Nevertheless, the controller's time of day is automatically and constantly matched to
the system time
• Master: The time of day on the controller can be readjusted
The time of day on the controller is used for the system. The system time is
readjusted
Only one outside sensor is required in the LPB plant. This sensor is connected to a
freely selectable controller and delivers via LPB the signal to the controllers with no
sensor.
The first numeral that appears on the display is the segment no. followed by the device
no.
6.20 Errors
When an error is pending, an error message can be displayed on the info level by
pressing the info button. The display describes the cause of the error.
Reset
Line no. Operating line
6710 Reset alarm relay
No
Yes
6711 Reset HP
No
Yes
When an error is pending, an alarm can be triggered via relay QX... The QX... relay
must be appropriately configured.
This setting is used to reset the relay, but the alarm is maintained.
Pending error messages from the heat pump are reset on this operating line. The
preset switch-on delay is bridged, thus avoiding undesirable waiting times during
commissioning or fault tracing.
This function should not be used in normal operation.
Error message functions
Line no. Operating line
6740 Flow temp 1 alarm
6741 Flow temp 2 alarm
6745 DHW charging alarm
6746 Flow temp cooling 1 alarm
The difference of setpoint and current temperature is monitored. A control offset
beyond the set period of time triggers an error message.
Error history
Line no. Operating line
6800…6819 History and error code 1 - 10
The controller saves the last 10 errors in nonvolative memory. Any additional entry
deletes the oldest entry in the memory.
For each error entry, error code and time of occurrence are saved.
The ACS 700 PC tool can be used to display the relevant actual values, setpoints and
relay outputs for each error.
Outside temp source
Reset alarm relay
Reset heat pump
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