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8.1C No Heat Or Not Enough Heat
• Symptoms: Circulation pump (heating pump) not turning, panel heat indicator not lit,
panel is ashing FL1.
Standard Troubleshooting Approach
Is there correct voltage
coming to the hot tub at
TB1?
240 VAC, +/-10%, or
(120/240 VAC, +/-10%
for J315/J325 models).
Replace circuit
board.
Repair connection.
Call an electrician.
Put hot tub in standard
filtration mode (page
21). Set temperature
high enough to initiate a
heat call. Is voltage ok
from circuit board to
circulation pump?
Test points 16 and 17 for
circulation pump.
No
No
Ye
s
Ye
s
Replace pump.
Yes
No
Is connection OK from
circuit board to pump?
Circuit Board Illustrations
A. 2002+ Protech LED Models (Page 50-51)
Note: Refer to the voltage and current charts on appendix page 46-47 for expected voltage/current readings.
Danger: Electrical Shock Hazard Exists!
High Voltage Present On Circuit Board. Use Ex-
treme Caution While Servicing Circuit Board.