25
Verify power
supply to
system.
Is the circulator indicator
LED on?
No (From Flowchart#1)
Yes
No
Verify that circulator is
operating properly.
Verify that 120vac is present
at the circulator terminals.
No
Replace the boiler control
board.
Yes
Verify circulator wiring or
replace circulator.
Yes
No
After 30 seconds does an
element energize?
Not On
Turn on all 40 amp circuit
breakers.
Verify that 40 amp circuit
breakers are on.
All
On
Verify that 240vac is present at the input to the boiler and the output
of all boiler circuit breakers.
240vac not present
240vac present
Replace circuit breakers.
Yes
No
Is there an increase in
temperature?
240vac
not
present
Verify that 240vac is pres
-
ent at the element.
Check element wires, main
power supply, and/or replace
electric boiler control board.
Yes
Boiler functioning properly.
Remove leads to elements
and verify ohm reading
at each element stud.
Reading should be between
9-12 ohms at each element.
OK
240vac present
Replace element if ohm read
-
ing is not within proper range.
No
OK
Verify 120vac
power to
Board L-N.
OK
OK
All
On
No
Power
Replace electric boiler
control board.
Check
element for
power.
TrouBLEsHooTing - fLoWcHArT#2