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07610-004-43-79-Q
"F12 Service needed,"
"Check booster
thermostat"
Faulty temperature probe (T3). Replace probe that connects to P13.
"F13 Communication
error,"
"Check 6-pin cable"
1. Loose connection in 6-pin cable between
display board and I/O module.
2. Faulty 6-pin cable between display board
and I/O module.
3. Faulty communication port on I/O module
or display board.
1. Fully disconnect 6-pin cable at each end, and reconnect
each end until a click is heard.
2. Inspect for broken wire or unseated terminal by gently
pulling on each wire at each end of the cable. Reseat any
loose terminals by inserting it fully into the housing using
long-nosed pliers. Replace cable if broken wire is found.
3. Temporarily substitute a veried good display board, and
check if F13 message recurs. If so, repeat substitution with
a good I/O module.
"F14 Service needed,"
"Check incoming
water pressure or
pressure switch"
1. Low or no water pressure.
2. Faulty pressure switch.
3. Faulty ll valve or ll valve not receiving
power.
1. Verify correct PSI.
2. Replace pressure switch.
3. Check continuity and replace if faulty.
"F15 Sanisure
violation"
1. Faulty booster heater.
2. Faulty heater contactor.
1. Check amperage on heater.
2. Check voltage on contactor coil and L1 and L2 legs.
"F16 LLC violation" Faulty or corroded probe. Clean or replace probe.
"F17 Excessive inlet
temp"
Inlet water supply too hot. Ensure inlet water supply is at required temperature.
DISPLAY SHOWS POSSIBLE CAUSES REMEDY
FAULT CODES
TROUBLESHOOTING
RESISTANCE-TO-TEMPERATURE VALUES
R (kΩ) °F
11.58 69.8
10.37 75.2
9.30 80.6
7.78 89.6
3.05 140.0
2.54 150.8
2.18 159.8
1.58 179.6
1.45 185.0
1.33 190.4
1.16 199.4
0.96 212.0
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