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07610-004-29-29-A
“F6 Service needed,”
“No water in wash tank”
1. Low or no water pressure.
2. Faulty inlet valve or fill relay.
3. Contactor to wash heater not turning off.
4. Faulty temperature input (T1) on IO
module.
5. Faulty temperature probe (T1).
6. Faulty float switch allows heaters to oper
-
ate with no water in tub.
1. Verify incoming water pressure is 8–12 PSI.
2. Verify that fill relay is supplying voltage to fill solenoid.
Replace faulty component.
3. Check for welded contacts. Verify that output from IO
module turns off when above the set temperature.
4. Substitute a 1.2 kΩ resistor for T1, and verify that wash
heater turns off. If not, replace IO module.
5. Verify that T1 resistance is correct with respect to tem
-
perature. (See Table 1.) If not, replace T1.
6. Replace float switch.
“F7 Service needed,”
“Check wash tank
thermostat”
1. Contactor to wash heater not turning off.
2. Faulty temperature input (P10) on IO
module.
3. Faulty temperature probe (T1).
1. Check for welded contacts. Verify that output from IO
module turns off when above the set temperature.
2. Substitute a 1.2 kΩ resistor for T1, and verify that wash
heater turns off. If not, replace IO module.
3. Verify that T1 resistance is correct with respect to tem
-
perature. (See Table 1.) If not, replace T1.
“F8 No water in wash
tank,” “Check inlet
water and door”
1. Malfunction of fill solenoid or fill relay.
2. Door is open, which inhibits fill mode.
3. Faulty door switch.
1. Replace faulty solenoid or fill relay.
2. Close door to activate door switch.
3. Replace or adjust door switch.
DISPLAY SHOWS
POSSIBLE CAUSES
REMEDY
FAULT CODES
TROUBLESHOOTING
“F9 Service needed,”
“Check incoming
power”
1. Incoming power not properly connected.
2. L3 is missing (3-phase units only).
1. Check connections to heater.
2. Verify that L3 is present and connected properly.
“F10 Service needed,”
“Check wash tank
thermostat and high
limit”
1. Faulty temperature input (T1) on IO
module.
2. Faulty temperature probe (T1).
3. Faulty high-limit switch.
4. Faulty wash heater.
5. Wash-heater contactor not energizing.
1. Substitute a 1.8 kΩ resistor for T1, and verify that wash
heater turns on. If not, replace IO module.
2. Verify that T1 resistance is correct with respect to
temperature. (See Table 1.) If not, replace T1.
3. Replace high-limit switch.
4. Check wash heater for proper resistance. Replace if
incorrect.
5. Verify that drive voltage to contactor coil is present during
a call for heat and that contactor closes. If voltage present,
replace contactor. If voltage not present, check wiring.
F11 Service need-
ed –check wash tank
thermostat
Faulty temperature probe (T1).
Replace probe that connects to P10.
