Elecro VULCAN Manual De Instalación Y Funcionamiento página 13

Note: In some cases the high limit thermostat tripping and a low fl ow
rate can be linked ie: when a fi lter becomes choked air can be drawn
into the fi ltration system and become trapped inside the heater so
causing the thermostat to trip.
Trouble Shooting – Digital
HEATER WILL NOT SWITCH FROM STANDBY (AMBER LIGHT ) TO ON
(RED LIGHT)
In most cases this will be the result of one of the following points not
being met.
Possible cause 1: The set point temperature has been achieved.
To confi rm that the digital thermostat is requesting the unit to heat, see if
there is an illuminated dot above the word 'Out' on the digital thermostat
display (see fi g 9) If illuminated go to step 2, if not illuminated raise the
required temperature to a value higher than the current water tempera-
ture. Confi rm whether the heater now switches to 'Heat on' mode (red
light)
If continuously illuminated:
Indicates that the current
water temperature has
fallen below the required
temperature.
If fl ashing:
Fig 9.
Indicates that the unit is in
'Time delay' mode.
Possible cause 2: The high limiting thermostat has tripped.
Remedy: Remove button cover and press red button to re-set (see fi g 8)
If a positive click is felt, the cause of the tripping must be investigated and
could be caused by a debris build-up or air pocket trapped inside the fl ow
tube of the heater.
Possible cause 3: Insuffi cient fl ow.
Remedy: If the display is fl ashing 'noFL' the fl ow rate has dropped below
the minimum level or has stopped completely. The cause of the reduced /
static fl ow rate should be investigated and resolved.
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