A4 Testing Flow Switch; A5 About Fuses - Jacuzzi LED Series Troubleshooting Manual

A4 Testing Flow Switch
When the "FL1 or FL2" message appears, it means the flow switch contacts
have failed to close when the pump was turned on, or failed to open when the pump
was turned off. This could be caused by an excessively dirty filter, an obstruction in
the flow path or by a bad switch. The first thing to look for is an excessively dirty filter
or an obvious obstruction, remembering (while not likely) that it is possible for a small object to work
its way into the plumbing where it will not be obvious. After verifying no obvious blockage exists, the
flow switch can be tested. Refer to page 16 for switch testing instructions.
A5 About Fuses
When current passes through a conductor the conductor heats up. If the conductor is a heavy piece
of wire or a strip of metal, it will pass large currents and generate very little heat. If a wire is fine, or
a strip of metal is thin, it will heat up at lower current levels. Fuses rely on this principle to protect
circuits from massive current flows by simply melting if their current rating is exceeded. By selecting
different alloys for the fuse element, fuses can be made to have their current rating exceeded for a
short period of time. Such slow-blow fuses are excellent for protecting motor circuits where start-up
currents (surge currents) are higher than running currents.
Fuse
Main Power, 20A
Main Power, 30A
Transformer, 1.5A
Testing Fuses
A good fuse should read continuity (0 Ω); a blown fuse will read no continuity (infinite ohms). See Figures 6
and 7 for testing methods.
CAUTION: Make sure replacement fuses are exactly those listed above. Never test a fuse for continuity
while installed in the fuse holder.
Figure 6
on board test
(power on voltage
reading)
DCV ACV
OFF
1000 750
200 DCA
200
20 200µ
2000m 2000µ
200m 20m
200m
2000k
10A
200k
20k
2000
200 +
Ω
40
1-Pump
Part Number
J-315/J-325, Models
6660-106
6660-105
6760-120
DCV ACV
OFF
750
1000
200 DCA
200
20 200µ
2000m 2000µ
200m 20m
200m
2000k
10A
200k
20k
2000
200 +
Ω
2-Pump
Models
X
X
X X
DCV ACV
OFF
750
1000
200 DCA
200
20 200µ
2000m 2000µ
200m 20m
200m
2000k
10A
200k
20k
2000
200 +
Ω
1-Pump
Export Models Export Models
X
X
Figure 7
off board test
(resistance reading)
DCV ACV
OFF
750
1000
200 DCA
200
20 200µ
2000m 2000µ
200m 20m
200m
2000k
10A
200k
20k
2000
200 +
Ω
2-Pump
X
X