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15 SYSTEM TEST
For testing the system at fixed power rates, a system test can be activated via the Installer menu.
In the main menu of the display, select the option System Test. This option is password protected.
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
0
Not active
1
Fan only
2
Low power
3
Ignition power
4
High power
5
High power limited
6
High limit error test
7
Low water cut-off 1 error test
8
Low water cut-off 2 error test
Table 15.1
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 203 ºF (95 ºC). When this temperature is reached the boiler will switch
OFF.
When the supply temperature cools down to 194 ºF (90 ºC) the boiler will start again.
During the system test the boiler and system circulator 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 which the system continues with normal demand
handling. When the system test mode is changed during an active system test, the 10-minute timer is restarted.
Description
System test mode not active
The fan is forced to run at maximum speed without starting the boiler
The boiler starts and after the ignition period has finished the boiler stays
at low power
The boiler starts and stays at ignition power
The boiler starts and after the ignition period has finished the boiler stays
at high power
The boiler starts and after the ignition period has finished the boiler stays
at high power limited by the parameter CH_max_power
Simulates the Max_Temp_Error
Simulates the LWCO_1_Error
Simulates the LWCO_2_Error
E93.1901EN032 Installation and Service Manual SlantFin VGH-CH / CO
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