A1.0 checking voltage to hot tub – Jacuzzi j315 User Manual
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A1.0 Checking Voltage To Hot Tub
Correct supply voltage wiring to the hot tub is essential for safe/proper operation. The fi rst step in
troubleshooting a new installation should be to take voltage readings at the terminal block TB1. Do not
trust wire colors. Electricians make mistakes and electrons are colorblind. A low line voltage or
incorrectly wired hot tub will result in either of the following symptoms: A) Strange or intermitent symp-
toms, B) Displays with indications that simply cannot be correct.
Many of the most perplexing problems in the past have been errors and voltage drops. Human safety
depends on proper hot tub grounding. It is essential that the voltage readings described below
are as indicated. The ground connection must be heavy duty wiring.
• All models (except J-315, J-325 convertible models) are exclusively powered by 240 VAC. The J-315,
J-325 models are convertible for either 120 VAC 3-wire or 120/240 VAC 4-wire operation. The 4-wire
power confi guration powers the heater only with 240 VAC for increased performance while powering all
other components with 120 VAC.
Verify Power Connections As Follows:
US/Canada J-315, J-325 Model (120 VAC/60Hz, fi g. K)
• Hot to Neutral: Measure across test points 1 and 23 with voltmeter for 120 VAC.
• Hot to Ground: Measure across test points 1 and 3 for 120 VAC.
US/Canada J-315, J-325 Model (240 VAC/60Hz, fi g. L)
• Hot to Neutral: Measure across test points 1 and 23 for 120 VAC; then across test points 2 and 23
for 120 VAC.
• Hot to Ground: Measure across test points 1 and 3 for 120 VAC; then across test points 2 and 3 for
120 VAC.
• Hot to Hot: Measure across test points 1 and 2 for 240 VAC,
US/Canada J-335, J-345 Models (240 VAC/60Hz, fi g. M)
• Hot to Hot: Measure across test points 1 and 2 for 240 VAC.
• Hot to Ground: Measure across test points 1 and 3 for 120 VAC; then across test points 2 and 3 for
120 VAC.
GRN
WHT
WHT
BLK
BLK
BLK
RED
1
2
3
US/Canada (60 Hz)
120 VAC 3-Wire
J315, J325
GRN
WHT
WHT
BLK
BLK
BLK
RED
RED
1
2
3
US/Canada (60 Hz)
240 VAC 4-Wire
J315, J325
fig. K
fig. L
fig. M
TB1
TB1
23
1
2
3
2
3
23
1
to Circuit
Board
to Circuit
Board
P
ower In
P
ower In
BLK
RED
GRN
1
2
US/Canada (60 Hz)
240 VAC 3-Wire
J335, J345
TB1
2
1
3
HOT
HOT
HOT
HOT
to Circuit Board
P
ower In
Danger: Electrical Shock Hazard Exists!
High Voltage Present On Circuit Board. Use Ex-
treme Caution While Servicing Circuit Board.