Camus Hydronics DynaMax DMH081 Installation, Operation And Service Manual page 55

Flow Switch not closed displayed on screen
The flow switch is not closed or the low water cutoff (LWCO, optional) was tripped. This is an automatic reset error and as soon as
flow is proven this error resolves itself. To identify the safety that is open use the continuity setting on your multimeter and go
across the contacts of the switches. The safety string is powered by DC voltage and varies between 10 to 35Vdc. The flow switch
safety string begins at J16-3 and ends at J16-1.
Is pump powered?
YES
Is there a current
transformer
YES
Use meter to verify
amperage draw on pump
and verify it with rating label
on pump
YES
Is there a double loop through
the current transformer?
YES
Check for contact closure
across terminals 9 and 10 on
field terminal board (perform
this step after verifying
paddle style flow switch is
operational)
YES
Remove J16 connector from
ignition control and check
continuity across
J16-1 and J16-3
NO
Check wiring between green
field terminal board and
ignition module (848-MN)
NO
Check pump wiring
and pump delay relay
Check operation of
NO
paddle style flow
switch installed on
outlet of DynaMax
Check that automatic
NO
air vent thumbscrew is
loose
Turn off power to boiler
NO
and loop Blue 38 wire
twice through current
transformer
Check wiring from
NO current transformer or
paddle flow switch to
field terminal board
YES Replace ignition
control (848-MN)
YES
Purge air from water lines
Insert jumper wire
NO across terminals 9 and
10 on field terminal
board
50