33
.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 something as long as there is
proper power to the hot tub. Check for error messages. Displayed error messages 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. Plug in a spare control panel. If it works, replace the control panel.
2. 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.
3. Check the transformer. See section A15, page 57.
4. Still no operation? Replace the circuit board.
Nothing Works (Panel Dead):
1. Check for proper power to the hot tub (see appendix page 46). Check for 240 VAC (120 or 240 VAC for J-
315) at TB1 on the main terminal block. See pages 50-51 for your circuit board configuration. If the voltage
is not 240 VAC (120 or 240 VAC for J-315) ±10%, consult an electrician.
2. Check for power at the transformer secondary.
Refer to appendix pages 57.
If power exists on the transformer
secondary, plug in a spare control panel. Still nothing? Replace the circuit board.
3. If no power exists at the transformer secondary, check for voltage at the transformer primary.
Refer to appen-
dix pages 57.
If voltage exists on the primary but is missing on the secondary, replace the transformer.
4. 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, replace the trans-
former. See section A5 (page 48) for specific fuse details.
.4 Hot Tub Doesn’t Come On For Filter Cycle
Turn power to the hot tub off and then on to restart the filter cycle program. Does the filter cycle start approxi-
mately two minutes after applying power?
•
If yes:
the hot tub is functioning properly. Refer to sections 4.1 - 4.2 (page 20) for filter cycle setup details.
Take time to explain the filter cycle selection and operation to your customer. Make sure your customer un-
derstands the filter cycles are selectable, not programmable.
•
If no:
select an appropriate filter cycle mode within two minutes after applying power. Refer to sections 4.1
- 4.2 (page 20). If the filter cycle starts within two minutes after setting, no corrective action is required. If
the filter cycle does not start two minutes after setting, replace the circuit board.
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