D No Heat Or Not Enough Heat (All Models) - Jacuzzi LED Series Troubleshooting Manual

8.1D No Heat or Not Enough Heat (All Models)

• Symptoms: Circulation pump (heating pump) is turning, panel heat indicator not lit,
panel is flashing FL1.
Standard Troubleshooting Approach
Is the circulation pump
(Heat Pump) moving
water?
Yes
Verify hot tub is in a
primary filtration mode
(page 8) then perform
step below.
Remove switch wires
from board. Increase set
temperature to initiate a
heat call, then jumper flow
switch wires together
(Fig. 7). Does heat
indicator appear and FL1
error message disappear?
Yes
Test flow switch with
ohmmeter for continuity
(0Ω) across switch
terminals (Fig. 9) Does
meter read continuity (0Ω)
with pump on?
Yes
Clean connectors between
flow cable and switch.
DANGER: Electrical Shock Hazard Exists!
High Voltage Present on Circuit Board. Use
Extreme Caution while Servicing Circuit Board.
20
No
1. Remove filter and
allow air to bleed
out of cartridge.
2. Check for proper
water level.
3. Check for clogged/
excessively dirty
filter.
4. Check for blockage
at filter wall fitting.
5. Check for sticking
weir.
6. Is pump moving
water?
Yes
Remove flow switch
connector from circuit
board test point 22 (Fig.
No
8). Place jumper across
exposed connector pins*.
Does heat indicator
appear and FL1 error
message disappear?
Yes
Repair or replace flow
sensor cable.
Remove flow switch
No
and inspect for debris
blockage. Remove
blockage or replace
switch.
Re-install flow switch.
Install flow switch
with arrow pointing in
direction of flow. Make
sure magnet arm doesn't
bottom out in fitting (Fig.
10).
No
See Section 8.12 (pg. 31)
Replace circuit board.
No
*Lightly scrape
contact pins at
point 22 with a
razor blade or
sandpaper to re-
move conformal
coating or oxida-
tion form contact
surface.
Fig. 7
Temporarily Jumper Flow Switch Cable
Wires Together as Shown.
Fig. 8
22
Temporarily Flow
Cable
Short Pins
with Jumper
#6560-864
Fig. 9
DCV
OFF
1000
200
20
DCV ACV
2000m
OFF
1000 750 200m
200 DCA
200
20 200µ 2000k
2000m 2000µ 200k
200m 20m 20k
2000
200m 200
2000k Ω
10A
200k
20k
2000
200 +
Ω
Closed
Open
Pump on
Pump off
Infinite Ω Continuity 0 Ω
DCV ACV
OFF
750
1000 200
200 DCA
20 200µ
2000m 2000µ
200m 20m
200m
2000k
10A
200k
20k
2000
200 +
Ω
Fig. 10
Arrows
correct
not Arrows
aligned
aligned
incorrect
Pipe
Incorrect Correct
Orientation Orientation End View
Correct
Orientation
ACV
750
200 DCA
200µ
2000µ
20m
200m
10A
+