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22.16 System test
For testing the system at fixed power rates, a system test can be activated via the menu. Via the system
test the boiler can be started without CH or DHW being present. The system test has priority.
The following modes are available:
System test mode
Description
0 (Not active)
System test mode not active
1 (Fan only)
The fan is forced to run at maximum speed without starting the burner
2 (Low power)
The burner starts and after the ignition period has finished, the burner stays at
low power
3 (Ignition power)
The burner starts and stays at ignition power
4 (High power)
The burner starts and after the ignition period has finished, the burner stays at
high power
5 (High power limited)
The burner starts and after the ignition period has finished, the burner stays at
high power, limited by the CH max. power parameter
6 (High limit error test)
Simulates the
Max_Temp_Error
7 (Low Water Cut Off 1 error test)
Simulates the
LWCO_1_ Error
8 (Low Water Cut Off 2 error test)
Simulates the
LWCO_2_ Error
Before running the system test modes first check if the heat can also be dissipated. Note that during this
mode the supply temperature can be raised above 95 ºC (203 ºF). When this temperature is reached the
burner will switch OFF.
When the supply temperature cools down to 90 ºC (194 ºF) the burner will start again.
During the system test the general and CH pump will be ON.
As the boiler will run at fixed power rates there is no setpoint control active.
Also the flame recovery is not active during system test demand. All other safety functions remain active.
The system test automatically stops after 10 minutes, after this the system continues with normal demand
handling. When the system test mode is changed during an active system test, the 10 minute timer is
reloaded.
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