38
8.6 Hot Tub Light Will Not Come On
Diagnostic Tools: Voltmeter.
Suggested Spare Parts (Page 59): Control panel, circuit board, light bulb, light harness.
Standard Troubleshooting Approach
Press Light Button on
control panel.
Do you hear a relay
click on the circuit
board?
Plug in spare control
panel then press Light
Button.
Do you hear a relay
click on the circuit
board?
Replace circuit board.
Replace control panel.
Is there 12 VAC at test
points 12 & 13?
Is the connection
between circuit board
and light, (DCU) con-
trol box OK?
Change Light (DCU)
Control box. Does
light work now?
Replace circuit board.
Correct connection.
Yes
No
No
Yes
Yes
Yes
Circuit Board Illustrations
A. 2006+ LED Models (Page 50-51)
North American 60Hz Installations:
As of January 1, 1994, the National Electrical Code (NEC) requires a Ground Fault Circuit Interrupter
(GFCI) on all hot tub installations in the US. A GFCI must be wired correctly or it will trip. Make sure the
electrician has wired the GFCI according to the diagrams on page 52.
No No
Replace light and
retest.
No
DCU was defective.
Test all light functions
before leaving job site.
Yes
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