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8.3 Nothing Works
Things to remember: when a system fails, there is probably one, and only one problem. Verify power to
the hot tub by observing the control panel’s LED display. The control panel will usually display some-
thing as long as there is proper power to the hot tub. Check for error messages. Displayed error mes-
sages usually indicate the problem.
Diagnostic Tools: Voltmeter.
Suggested Spare Parts (Page 59): Fuses (see appendix page 48), control panel, circuit board.
Nothing Works (Panel Indicator Lit):
1.
2.
3.
4.
Plug in a spare control panel. If it works, replace the control panel.
Remove power from the hot tub. Check the connections on the sensor harness and verify proper
resistance of the temperature and hi-limit sensors (see appendix page 55). Replace the defective
temperature or hi-limit sensor, then test the system.
Check the transformer. See section A15, page 57.
Still no operation? Replace the circuit board.
Nothing Works (Panel Dead):
1.
2.
3.
4.
Check for proper power to the hot tub (see appendix page 46). Check for 240 VAC (120 or 240
VAC for J-315, J-325) at TB1 on the main terminal block. See pages 50-51 for your circuit board
con guration. If the voltage is not 240 VAC (120 or 240 VAC for J-315/J-325) ±10%, consult an
electrician.
Check for power at the transformer secondary. Refer to appendix page 57. If power exists on the
transformer secondary, plug in a spare control panel. Still nothing? Replace the circuit board.
If no power exists at the transformer secondary, check for voltage at the transformer primary. Refer
to appendix page 57. If voltage exists on the primary but is missing on the secondary, replace the
transformer.
No power at the transformer primary indicates either an open 1.5 Amp fuse, 20/30 Amp fuse, or a
loose or disconnected wire. If voltage exists on the primary but is missing from the secondary, re-
place the transformer. See section A5 (page 48) for speci c fuse details.
8.4 Hot Tub Doesn’t Come On For Filter Cycle
Turn power to the hot tub off and then on to restart the lter cycle program. Does the lter cycle start
approximately two minutes after applying power?
• If yes: the hot tub is functioning properly. Refer to sections 4.1 - 4.2 (page 20) for lter cycle setup
details. Take time to explain the lter cycle selection and operation to your customer. Make sure your
customer understands the lter cycles are selectable, not programmable.
• If no: select an appropriate lter cycle mode within two minutes after applying power. Refer to sec-
tions 4.1 - 4.2 (page 20). If the lter cycle starts within two minutes after setting, no corrective action is
required. If the lter cycle does not start two minutes after setting, replace the circuit board.