Jacuzzi LED Series Troubleshooting

16
“- - -” Watchdog (All Models)
Water temperature has reached 118°F (48°C). DO NOT ENTER HOT TUB WATER!
The entire system is disabled. Refer to test steps 1-4 below:
1. Check hi-limit and temperature sensor resistance values. Both sensors should
measure close in resistance to each other (e.g. one may be defective and way out of range). Refer
to appendix page 49 for expected hi-limit/temperature sensor resistance/water temperature
values. If either sensor is faulty, replace it and recheck system. If problem persists, proceed to
steps 2.
2. Plug in new control panel. If problem persists, proceed to step 3. If problem corrects, replace
panel.
3. Check voltage at transformer secondary. Refer to Section A29, page 51 for transformer testing
instructions. If voltage is bad, replace transformer. If voltage is good, perform step 4.
4. Check circuit board transformer connections. If connections are loose or oxidized, repair
connections and retest system. If problem persists, replace circuit board.
7.4 Testing Flow
Testing the Flow Switch
A. Verify ow switch directional arrow is pointing in the direction of ow
away from the heater output. If switch orientation is incorrect, loosen
or tighten switch no more than 1/2 turn, being careful not to bottom out
switch in tting. The switch’s ow arrow must be parallel to tee tting
as shown (Fig. 1). Test system operation. If condition corrects, skip
steps B-C.
B. Remove switch from tting making note of the number of turns
(revolutions) it takes to do so. Visually inspect switch for debris
interference or damage. If debris is present, remove debris, then
install switch with the same number of turns as originally installed.
Test system. If switch is damaged, replace switch and retest system. If
condition corrects, skip step C.
C. Test switch operation with an ohmmeter (set to 1000-2000 Ω range) for
continuity across switch terminals. Measure resistance across switch
terminals for innite resistance with the magnet arm not touching the
switch body (Fig. 2), and for continuity (0 Ω) with the magnet arm
touching the switch body (Fig. 2). If ow switch tests OK, check switch
wiring harness. If wiring harness tests OK, replace circuit board.
D. Verify that low ow is not preventing the ow switch from closing.
FLOW
Incorrect
Orientation
Correct
Orientation
FLOW
Fig. 2
Fig. 1
Pipe
End View
correct
incorrect
Arrows
not
aligned
Arrows
aligned
Open
Closed
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
DCV ACV
DCA
OFF
1000
200
20
2000m
200m
2000k
200k
20k
2000
200
10A
200m
20m
2000µ
200µ
Ω
+
750
200
Infinite Ω
Continuity 0 Ω

Jacuzzi LED Series Specifications

General

Brand	Jacuzzi
Model	LED Series
Category	Hot Tub
Language	English