Operation Manual

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Siemens Schweiz AG User Manual CE1U2354en
HVAC Products Maintenance/special mode 23. August 2007
The difference of setpoint and actual temperature is monitored. A control offset beyond
the set period of time triggers an error message.
Line no. Operating line
6800…6819 History …
The basic unit stores the last 10 faults in non-volatile memory. Any additional entry
deletes the oldest in the memory. For each error entry, error code and time of
occurrence is saved.
6.22 Maintenance/special mode
Maintenance functions
Line no. Operating line
7040 Burner hoursinterval
7041 Burner hrssince maintenance
7042 Burner start interval
7043 Burn starts since maint
7044 Maintenance interval
7045 Time since maintenance
7053 Flue gas temp limit
7054 Delay flue gas message
7119 Economy function
Locked released
7120 Economy mode
Off ¦ On
As soon as the selected number of burner operating hours or the selected number of
burner starts has elapsed, a service message will be displayed.
Counted for the message are the number of operating hours and the number of starts
of the first burner stage (input E1).
The current value is summated and displayed. On this operating line, the value can be
reset to 0.
Shows a maintenance message on the display and, if configured, activates flue gas
relay K17.
Delays display of the maintenance message and activation of the flue gas relay (K17).
Locked
Economy mode is not possible.
Released
Economy mode can be activated.
Switches economy mode on or off
Chimney sweep
Line no. Operating line
7130 Chimney sweep function
The burner will be switched on. To ensure continuous burner operation, the only switch-
off point used is the boiler temperature's maximum limitation (TKmax).
First, all connected loads will be locked to ensure the boiler temperature will reach the
setpoint of 64 °C as quickly as possible.
When the minimum temperature of 64 °C is attained, the available heating circuits are
switched on one by one, using a dummy load, to make sure the heat generated by the
boiler is drawn off so that the burner will remain in operation.
Error history
Burner hours run interval,
burner start interval
Burner hours run, burner
starts since service
Flue gas temp limit
Delay flue gas message
Economy function
Economy mode