Elecro Engineering B-100 Installation & Operating Manual page 9

Possible Cause B.) The heater has been plumbed incorrectly
Solution = The B-100 heater has a fixed flow direction indicated on the
rigt hand manifold that houses the flow switch, ensure that the water has
been plumbed in the correct direction through the heater (ie: entering on
the left and exiting on the right).
The Amber OVER TEMP. TRIP neon indicator is illuminated:
Possible Cause: The Safety Thermal Cut Out has tripped.
Solution = Unscrew the black cover on the front face of the heater, press
the red button, if a positive click is felt it is likely that an air pocket has built
up within the heater and needs to be purged to prevent damage to the
heating elements (see diagram below).
If a positive click is not felt:
Cause: The air temperature within the control enclosure is above 60˚C
to reduce the temperature run the circulation pump for 5 minutes to act
as a heat sink to cool the enclosure - the electrical cabinet thermal cut
out will automatically reset itself when it has cooled to a safe operating
temperature.
The Amber OVER TEMP.
TRIP neon indicator only
illuminates when the set
point is above the water
temperature.
N.B - The Amber OVER TEMP. TRIP neon indicator will only ever illuminate
when the set point is above the current water temperature (i.e. you would
like the heater to heat) this is to inform the operator that there is an issue
that needs to be resolved before heating can take place. If the water
temperature is above the set point temperature the Amber OVER TEMP.
TRIP neon indicator will not illuminate.
None of the neon indicators illuminate when the heater is switched on:
Possible Cause A.) An external fuse / RCD / GFCI has tripped.
Solution = Check all external fuses to ensure power is arriving at the heater.
Possible Cause B.) The B-100 heater fuse has blown.
Solution = Check the panel mounted fuse in the operation panel. Using
a flat blade screwdriver carefully rotate the inner fuse holder counter
clockwise to release the fuse holder in order to check the fuse. If this has
blown please replace with a suitable glass 3-Amp fuse.
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