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A2 Checking Voltages To Devices
Device voltages are often measured at the circuit board to determine whether the board or the device is bad. If
the circuit board delivers voltage when the device operation is called, the circuit board is probably good and the
problem lies with the device or the wiring to the device. The following voltage chart shows operating voltages for
all major hot tub components. Voltage is considered good if it is within ±10% of the listed value. Refer to appendix
pages 50-51 for your specific circuit boards test point locations.
• 2004 ProTech LED J-315 Models (US/Canada 50/60Hz)
Device Test Points Voltage ±10%
Pump (Low Speed) 18 and 19 120 VAC
Pump (High Speed) 18 and 20 120 VAC
Circulation Pump 16 and 17 120 VAC
Heater 6 and 7 120 VAC or 240 VAC*
Ozone Generator 14 and 15 120 VAC
* Depends whether hot tub is Connected to 120 VAC (3-wire) or 240 VAC (4-wire) supply
• 2004 ProTech LED J-335, J-345 (US/Canada/Export 50/60Hz)
Device Test points Voltage ±10%
Pump 1 (Low Speed) 18 and 19 240 VAC
Pump 1 (High Speed) 18 and 20 240 VAC
Pump 2 (J-335 & J-345) 21 and 22 240 VAC
Circulation Pump 16 and 17 240 VAC
Heater 6 and 7 240 VAC
Ozone Generator 14 and 15 240 VAC
A3 Checking Current Consumption Of Devices
This table lists the current draw for most major hot tub components.
J-315Model (US/ Canada 60Hz)
Device Current Consumption ±10%
Pump High/Low 10.6 - 13.6A / 2.6 - 3.9A
Heater 16.6A (240 VAC) / 8.3A (120 VAC) 14.5 Ohms
Circulation Pump 0.5A
Ozone Generator 0.1A
J-325, J-335, J-345 Models (US/Canada 60Hz)
Device Current Consumption ±10%
Pump 1 High/Low 7.0A - 9.5A / 2.5A - 3.2A
Pump 2 High (J-335 & J-345) 6.8A - 9.3A
Heater 22A - 25A 10.5 Ohms
Circulation Pump 0.5A
Ozone Generator 0.1A
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