VI. Error Codes on the topside:
DIGITAL TOPSIDE ERROR CODES.
Solid FLO or FL
This means a failure of the pressure switch. To confirm that is the cause of the
failure, turn the main power off. ID whether you have a pressure switch or flow
switch. Then identify where it’s at. Flow switches are connected to the piping
hose. Pressure switches are screwed into the heater assembly. Flow the cord
from either the flow switch or pressure switch to where in plugs into the board.
Unplug. Turn on main power. If the spa still goes to Solid FLO or FL, then the
board has failed. If the pump now comes on automatically when you turn main
power on, you have isolated the problem to be at the flow/pressure switch. If you
have a flow switch, you will need to replace. If you have a pressure switch, you
may try to adjust the pressure switch. If your pressure switch has a dial
adjustment on the pressure switch, you can try turning the wheel one full turn
clockwise. Otherwise, replace the pressure switch.
Flashing FLO or FL
with temperature and possibly COOL or FC. This means the
board has turned on the #1 or circulation pump and does not see water flow. If
you can see water moving, first try removing the filters to see if this helps. If not
and sufficient water is moving, usually it’s best to replace the pressure switch. It’s
always necessary to replace flow switch. You might be able to adjust a pressure
switch by turning the adjustment wheel one full turn counterclockwise.
SN
. Means a sensor failure. It will be either the temperature or overheat sensor.
The method to tell which is by using a good digital voltmeter. Set the meter to
OHMS. On sensor cords the access to check the resistance can be difficult. A
common way to overcome the minimal access is with a paper clip extensions for
the meter probes. You take a paper clip and unfold and break into two. Now use
the paper clip to connect the sensor to the meter probes.
Sn1
. OH Sensor has failed. Replaced.
Summary of Contents for Z Builder Series
Page 43: ...balanced and not using too much or too little chemicals...
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