MODBUS COMMUNICATIONS HeatNet Control V3
Page 128
DHW Enabled (1)
DHW Mode had been enabled in the menus.
Combustion Air Damper Prove (1)
Status of Combustion Air Damper Prove Input J12B
0 = not proven, 1 = proven
Air Switch (Blower) Fault
DHW Sensor not detected (1)
0 = detected, 1 = not detected
DHW Boiler (1)
This control board has been designated a DHW boiler by cutting the DHW
jumper (JPS1).
0 = no, 1 = yes (DHW jumper cut)
Operating Limit Clamp (1)
Boiler input is being limited (clamped) due to a high supply (outlet)
temperature.
Firing boilers limited by value in BMS Flow Rate Register (1)
0 = not limited, 1 = limited
Firing boilers limited by value in BMS Limit Boilers Register (1)
0 = not limited, 1 = limited
Stack Sensor not detected (2)
0 = detected, 1 = not detected
System Return Sensor not detected (2)
0 = detected, 1 = not detected
(1) Available in firmware version 1.30+.
(2) Available in firmware version 2.00+.