25
8.1D No Heat or Not Enough Heat (All Models)
• Symptoms:
Low speed pump 1 or circulation pump (heating pump) is turning, panel heat
indicator not lit, panel is
flashing
FL1.
Standard Troubleshooting Approach
Is the low speed pump
or circulation pump (Heat
Pump) moving water?
Verify hot tub is in
standard filtration mode
step below.
Remove switch wires
from board. Increase set
temperature to initiate a
heat call, then jumper flow
switch wires together (Fig.
9-10). Does heat indicator
appear and FL1 error
message disappear?
Test flow or pressure
switch with ohmmeter for
continuity (0Ω) across
switch terminals (Fig. 11)
Does meter read continuity
(0Ω) with pump on?
Clean connectors between
flow cable and switch.
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?
Remove flow or pressure
switch connector from
circuit board test point
23 (Fig. 10). Place
jumper across exposed
connector pins
*
. Does
heat indicator appear
and FL1 error message
disappear?
Repair or replace flow or
pressure sensor cable.
Remove flow or pressure
switch and inspect
for debris blockage.
Remove blockage or
replace switch.
Re-install flow or
pressure switch. Install
flow switch with arrow
pointing in direction of
flow. Make sure magnet
arm doesn’t bottom out
in fitting (Fig. 12).
Models with a circulation
pump:
See Section 8.12 (pg.
Models without a
circulation pump:
Replace circuit board.
No
Yes
*
Lightly scrape
contact pins at
point 23 with a
razor blade or
sandpaper to re-
move conformal
coating or oxida-
tion form contact
surface.
No
No
No
Yes
Yes
Yes
Yes
No
Fig. 9
Fig. 10
Fig. 11
Temporarily Jumper
Flow or Pressure
Switch Cable Wires
Together as Shown.
Fig. 12
FLOW
Incorrect
Orientation
Correct
Orientation
FLOW
Pipe
End View
correct
incorrect
Arrows
not
aligned
Arrows
aligned
Temporarily
Short Pins
with Jumper
#6560-864
Flow
Cable
22
23
Infinite Ω
Continuity 0 Ω
Pump off
Pump on
Open
Closed
Jumper
Jumper
DCV
ACV
DCA
OFF
1000
200
20
2000m
200m
2000k
200k
20k
2000
200
10A
200m
20m
2000µ
200µ
Ω
+
750
200
DCV
ACV
DCA
OFF
1000
200
20
2000m
200m
2000k
200k
20k
2000
200
10A
200m
20m
2000µ
200µ
Ω
+
750
200
Correct
Orientation
DCV
ACV
DCA
OFF
1000
200
20
2000m
200m
2000k
200k
20k
2000
200
10A
200m
20m
2000µ
200µ
Ω
+
750
200
DANGER: Electrical Shock Hazard Exists!
High Voltage Present on Circuit Board. Use
Extreme Caution while Servicing Circuit Board.