D No Heat Or Not Enough Heat - Jacuzzi J-315 Manual

.1D No Heat Or Not Enough Heat

• Symptoms: Circulation pump (heating pump) is turning, panel heat indicator not lit, panel
is flashing FL1.
Standard Troubleshooting Approach
Is the low speed pump or cir-
culation pump (Heat Pump)
moving water?
Yes
Verify hot tub is in standard
filtration mode, then perform
step below. Remove flow
wires from switch. Increase
set temperature to initiate a
heat call, then jumper flow
switch wires together (see
fig. G). Does heat indicator
appear and FL1 error message
disappear?
Yes
Test flow switch with ohm-
meter for continuity (0Ω)
across switch terminals (fig.
I) Does meter read continuity
(0Ω) with pump on?
Yes
Clean connectors between
flow cable and switch.
*Lightly scrape contact pins at
point 23 with a razor blade or
sandpaper to remove confor-
mal coating or oxidation form
contact surface.
Danger: Electrical Shock Hazard Exists!
High Voltage Present On Circuit Board. Use Extreme
Caution While Servicing Circuit Board.
No
1. Remove filter and
allow air to bleed out
of cartridge.
2. Check for proper
water level.
3. Check for clogged/ex-
cessively dirty filter.
4. Check for secondary
screen filter.
5. Is pump moving
water?
Yes
Remove flow switch con-
No
nector from circuit board
at point 23 (fig. H). Place
jumper across exposed
connector pins*. Does heat
indicator appear and FL1
Error message disappear?
Yes
Repair or replace flow sen-
sor cable.
No
Remove flow switch and
inspect for debris blockage.
Remove blockage or replace
switch. Install flow switch
with arrow pointing in
direction of flow. Make sure
magnet arm doesn't bottom
out in fitting (fig. J).
No
See section 8.10 (pg. 43)
Replace circuit board.
No
Temporarily
Short Pins
with Jumper
#6560-864
Incorrect
Orientation
30
fig. G
Temporarily Jumper
Flow Switch Cable
Wires Together as Shown.
fig. H
22
23
fig. I
Ω
Open
Closed
Pump off
Pump on
Ω
Infinite Continuity 0
fig. J
Arrows
Arrows
not
aligned
aligned
Correct
Orientation
Flow
Cable
Ω
correct
incorrect
Pipe
End View