Gecko MSPA-1-AS, Service Manual

Page: 23 / 63

Service manual 22
ERROR MESSAGES "HL" Error Message
The "HL" error message is displayed when a problem is detected with the high-
limit sensor: the system has shut down the heater because the water
temperature at the heater has reached 119
° F (48 ° C).
c- If the "HL" message is still displayed,
replace the high-limit sensor.
d- If the problem persists, replace the
board referring to the "How to
Replace the Board" section of this
manual.
3• If the reading is 119
°
F (48
°
C) or
higher:
Go to next page if the right
temperature is displayed on the top
side control.
Go to page 24 if the top side control
does not display the right temperature.
1• With the help of a digital thermo-
meter, measure the temperature of
the water.
2• If the reading is below 119 ° F (48 ° C):
a- Verify if the heater barrel feels hot.
If it does, make sure to clean the filter
and to look for air locks, closed valves
or anything that could limit the flow
of water in the piping.
b- If it does not, verify if the high-limit
sensor is properly connected to the
board.
Unplug the sensor connector and try
to clean the pins on the board using
a screwdriver (a small coating of film
may cause a bad connection).
Reconnect the sensor.
Switch the GFCI off then on between each step to reset the system!