30
8.1D 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
Danger: Electrical Shock Hazard Exists!
High Voltage Present On Circuit Board. Use Extreme
Caution While Servicing Circuit Board.
Is the low speed pump or cir-
culation pump (Heat Pump)
moving water?
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?
Test flow switch with ohm-
meter for continuity (0Ω)
across switch terminals (fig.
I) 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/ex-
cessively dirty filter.
4. Check for secondary
screen filter.
5. Is pump moving
water?
Remove flow switch con-
nector from circuit board
at point 23 (fig. H). Place
jumper across exposed
connector pins*. Does heat
indicator appear and FL1
Error message disappear?
Repair or replace flow sen-
sor cable.
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).
Replace circuit board.
No
Yes
*Lightly scrape contact pins at
point 23 with a razor blade or
sandpaper to remove confor-
mal coating or oxidation form
contact surface.
No
No
No
Yes
Yes
Yes
Yes
No
See section 8.10 (pg. 43)
fig. G
fig. H
fig. I
Temporarily Jumper
Flow Switch Cable
Wires Together as Shown.
fig. J
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
Pump off
Pump on
Open
Closed
Jumper
Ω Ω
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