Balboa Water Group BP600 Troubleshooting & Service Manual page 36

Testing the Sensor Set (cont.)
7. If there is a message indicating an open or faulty sensor:
Unplug the sensor set (but leave the original sensors in the
heater) and plug in the test sensor set. Put both sensors
into the same cup of warm water (ideally above the set
temperature, so the spa won't try to heat during this test, as
there is no heater protection during this test) and verify that
they read the same temperature (within 1°F/0.5°C).
If the problem is solved, replace the sensor set. If the
problem is not solved, do not replace the sensor set.
Plug in the original sensor set to verify that there is not a
connection problem.
If the problem continues after following the above steps,
then replace the circuit board.
M-7 Replacement Sensor
M-7 REPLACEMENT SENSOR
HEATER
METAL
TUBE
Manufactured under one or more of these patents. U.S. Patents: 5332944, 5361215, 5550753, 5559720, 5,883,459, 6253227, 6282370, 6590188, 6976052, 6965815, 7030343, 7,417, 834 b2,
36
Canadian Patent: 2342614, Australian patent: 2373248 other patents both foreign and domestic applied for and pending. All material copyright of Balboa Water Group.
Sensor Pins: At times, a protective coating may on
accident coat the sensor pins during manufacturing.
Those pins may need to be scraped and the sensors
plugged back in.
Tip: If one sensor (A or B) seems to be having problems,
swap the cables of sensor A with sensor B.
If the problem stays with the same sensor (according to
topside messages) it's a board problem; if the problem
moves to the other sensor it's a sensor problem.
NUT
STAINLESS WASHER
ORING
SENSOR
SENSOR HOUSING MOUNT
TESTING SENSOR PINS
ALWAYS TURN THE POWER OFF
WHEN PLUGGING AND UNPLUGGING!
(Sample Board Shown )
2013-06-22