Elecro Engineering In-Line + Swimming Pool Heater Installation Instructions & Operating Manual page 7

In most cases this will be the result of one of the following not being met.
Possible Cause 1.) The required temperature has been achieved.
To confirm that the digital controller is requesting the unit to heat check that the window next to
the word HEAT is illuminated. If illuminated go to step 2, if not illuminated increase the required
temperature to a value higher than the current water temperature. Confirm whether the heater
now switches to HEATER ON mode
REQUIRED
TEMP
Possible Cause 2.) The high limiting thermostat has tripped.
Remedy; remove button cover and press red button to re-set (See diagram below). 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 flow tube of the heater.
Possible Cause 3.) Insufficient Flow.
The heater will display a noFL alarm message in the upper (red) display window when the heater
has detected that the flow rate has dropped below 1,000-litres per hour or has stopped
completely.
T
ROUBLE
Heater will not switch to HEATER ON mode
PRIORITY HEATING
Step 1 - Unscrew the black cover
Step 2 - Push the red button
S
HOOTING
HEAT = If Continuously Illuminated
Indicates that the water temperature has fallen
below the required temperature.
HEAT = If Flashing
Indicates that the heater is in timed delay mode (see
previous page).