Dunkirk DCBF-100 Manual page 133

FAULT SOLUTION SECTIONS
PCB connector x22 Hall
With water running
effect sensor terminals.
L
Is main water filter and
through DHW circuit,
Check the voltage is YES YES Check DHW NTC YES
YES
assembly clean and
measure red and white
Replace PCB
approximately 5 VDC senor for proper OHM
rotor free to move?
wire for 2.8 VDC for
between the Red and value
flow triggering.
Blue wires. See Wiring
Diagrams.
NO NO NO
NO
Clean or Replace Replace Hall Effect Sensor
Replace DHW NTC sensor
Replace PCB
50
PN 240012875 REV. B [07/01/2021]