turn up the temperature on the aquastat to the maximum setting, it should be returned
to the normal setting when you are finished troubleshooting. The power relays for
controlling the elements should now start to turn on with the same one to two minute
delay. As each relay turns on on, one indicator light on the control board should come
on as well.
a) If the element relay indicator lights do not come on, disconnect the temperature
sensor by pulling out the connector at the control board (the one with the two gray
wires).
b) If the indicator lights now come on, after waiting for the one to two minute delay
between each element the temperature sensor needs to be replaced. If they do not
come on, short the two gray wires on the pump relay. If they come on the pump
relay needs to be replaced.
c) If the indicator lights still do not come on the control board needs to be replaced.
d) If the indicator lights come on, but the relays for the elements do not come on then
the low water cut off or the high limit control may be preventing them from coming
on. This may be due to a faulty component, or may be an actual low water, or high
temperature condition.
(7) If the boiler is equipped with the low water cut off option try the following only when
you are sure the boiler and the heating system are completely full of water.
a) Unplug the low water cut off from the control board. Temporarily (no more than one
second) place a jumper wire across the two pins of the low water cut off connector
on the control board, the element relays should all immediately turn on.
b) If the relays energize, replace the low water cut off, otherwise go on to the next step.
(8) Temporarily (no more than one second) place a jumper wire across the two terminals on
the high limit control.
a) If the relays energize, replace the high limit control.
(9) If all the relays energize and there is no heat, then check for power to each of the
heating elements.
a) With all the relays energized, check that there is power to each of the elements with
a volt meter. If there is no voltage reading, replace the relay connected to that
element.
b) If there is power to the elements, but no heat, then with the all the power
disconnected to the boiler, check the resistance of each element with an ohm meter
to see if is correct. Replace any elements, as necessary. If the element is open circuit
and the cause is unknown, it is advisable to also change the relay connected to that
element.
If you have gone through the above steps, and the boiler is still not working, please contact us
for assistance.
Concept Manufacturing Inc.
Box 23008 RPO McGillivray
Winnipeg, Manitoba, Canada
R3T 5S3
Phone:
204-284-9111
Fax:
204-284-9229
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