OK... so today i tested with the following results:

I cut power to the spa and removed the pressure switch cables and tested them for continuity (good).

Then i put my ohm tester on the pressure switch leads and got nothing (good).

Turned on the power and tested switch again and got 0 (good).

Next i tested the voltage on each of the heater element leads to ground (120v) each.

I tested across the leads with same result (good).

I tested all the relays (7 of them) for voltage and all but 2 had 120v on both leads. The top two relays had voltage on only 1 lead. I tested all the relays for function and all seem to work (not stuck and now i know which relay operates which motor) Both motors work on low speed, but i cannot get the 2-speed motor to shift into high. I tried manipulating the relays with no luck.

I inspected and tested the fuses (2) and both are good. I am completely confused now. I've attached a picture of my board. Please help!!

Balboa WH R576 DCAH
60 Hz
Whirlpool 52222-03

-Joseph

What voltage do you get when you put your meter on the black & red wires, the black & white wires, red & white wires?

PM me your e-mail address

Black/Red = ~260v
Black/White = ~130v
Red/White = ~130v

PM sent.

The Display Continually Shows FLO or the
Status/Heat LED is Flashing Briefly On Once
a Second.
When this is happening, the software is detecting pressure
at the pressure switch without the pump running.
• Make sure the slice or ball valves are open. If any valves
are closed, opening them may remove the error message
from the display and the spa should operate normally.
• If the spa does not operate normally, disconnect the wire
from the pressure switch.
• If the spa operates normally, turn OFF the spa system,
recalibrate the pressure switch if possible (see page 17).
If the pressure switch cannot be recalibrated, replace the
pressure switch. Clean the area where the pressure switch
is located with a metal brush. Use plumber’s sealant when
installing a new pressure switch.
• If the problem continues, replace the circuit board.

The Display is Flashing FLO
When this is happening, the software is detecting no
pressure at the pressure switch with the pump running.
The following is a list of most probable causes of this
message. Check these first:
• Check the water level.
• Remove the filter cartridge, then run the spa. If the message
disappears, then clean or replace the filter cartridge.
• Check the slice or ball valves, be sure they are open.
• Make sure the pump motor is functioning properly. If not,
use the Balboa Quick CheckTM or a multi-meter to verify
system box output to the pump.
• Check the floor/suction grills for obstructions.
• Check the pump to be sure it is primed and pumping properly.
• Check the pressure switch wire for cuts.
• If all of these items are in working order, attempt to
recalibrate the pressure switch (see below). If the
pressure switch cannot be recalibrated, replace the
pressure switch. Clean out the area where the pressure
switch is located with a metal brush. Use plumber’s
sealant when installing a new pressure switch.
• If the problem continues, replace the circuit board.

• Rotate the star wheel on the pressure switch clockwise
until no continuity is shown on the meter.
• Rotate the star wheel on the pressure switch counter
clockwise until continuity is shown on the meter.
• Turn on the high-speed pumps and run for at least ten
seconds. You should again see continuity on your meter.
• Turn off all pumps, and within four seconds, continuity
should no longer exist.
• If after four seconds, you still see continuity on the meter,
attempt to recalibrate the pressure switch.
• If you still have problems calibrating, then replace the
pressure switch.
Note: The main reason for pressure switch failure is
poor water chemistry. Instruct the owner in proper water
maintenance.


Pressure Switch Calibration
When the display continually shows FLO , this
usually indicates that the pressure switch needs adjustment
or has malfunctioned. When servicing a spa with a solid FLO
message:
• Disconnect the pressure switch wire at the circuit board.
The FLO message will disappear within five seconds. At
this point, the pressure switch can be calibrated.
• Set your voltmeter to ohms.
• Attach the pressure switch wire and your voltmeter
probes to the Balboa “LJS.” You should see continuity
at this point.
• Rotate the star wheel on the pressure switch clockwise
until no continuity is shown on the meter.
• Rotate the star wheel on the pressure switch counter
clockwise until continuity is shown on the meter.
• Turn on the high-speed pumps and run for at least ten
seconds. You should again see continuity on your meter.
• Turn off all pumps, and within four seconds, continuity
should no longer exist.
• If after four seconds, you still see continuity on the meter,
attempt to recalibrate the pressure switch.
• If you still have problems calibrating, then replace the
pressure switch.
Note: The main reason for pressure switch failure is
poor water chemistry. Instruct the owner in proper water
maintenance.
this point.

When the display is flashing FLO, this may indicate
a flow restriction, such as a dirty filter. Another cause of the
flashing FLO message could be a faulty or malfunctioned
pressure switch. When servicing a spa with a flashing FLO
message:
• Set your voltmeter to ohms.
• Disconnect the pressure switch wire from the circuit
board, and turn on the low-speed pump.
• Connect the pressure switch wire and voltmeter probes
to the Balboa “LJS.” At this point, the pressure switch
can be calibrated.
• Adjust the pressure switch by rotating the star wheel
counter-clockwise until continuity appears on the meter.
• Switch from low speed to high speed if available and
run for ten seconds. After ten seconds has passed, turn
off all pumps.
• After four seconds, check the
voltmeter and verify that there
is no continuity showing.
• If there is continuity,
adjust the star wheel
clockwise until there is
no continuity. Re-test with
the low-speed pump as
before.
• If the pressure switch cannot be adjusted adequately,
replace it.

Those are very high voltage reading, you might want to contact you electric company.

Hi again. I tested again with a digital voltmeter and got better results.

Black/Red = 242v
Black/White = 121v
Red/White = 121v

I also re-tested across the heater elements and there is no voltage. Only on each element to ground there is 120v. The pressure switch is reading 0 Ohm or closed circuit.

Ok I finally found the problem! The pressure switch wires are bad

I disconnected it from the circuit board and stuck my probe in between the jumpers on the board and voila! I heard a relay snap and the error disappeared. I re-tested the cables for continuity and the red wire is bad. So.... after a minor cut and splice my dreaded "FL" problem has been resolved. So im only out about $50 for a pressure switch that i really didnt need.

Thanks again for all your help Jeffz.

Glad to hear it is fixed. Enjoy!

After following all this advice, I was still stuck with a flashing FL error. After some careful deduction (and by that I mean randomly pushing on things), it turned out I had a bad connection between pump 1 and the circuit box.

Also, at an earlier point, I had the pump plugged into the ozone control port. This was not helpful, either.