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FAULT CODES
DISPLAY SHOWS
POSSIBLE CAUSES
1. Low or no water pressure.
2. Faulty inlet valve or fill relay.
3. Contactor to wash heater not turning off.
"F6 Service needed,"
4. Faulty temperature input (T1) on IO
"No water in wash tank"
module.
5. Faulty temperature probe (T1).
6. Faulty float switch allows heaters to oper-
ate with no water in tub.
1. Contactor to wash heater not turning off.
"F7 Service needed,"
2. Faulty temperature input (P10) on IO
"Check wash tank
module.
thermostat"
3. Faulty temperature probe (T1).
1. Malfunction of fill solenoid or fill relay.
"F8 No water in wash
tank," "Check inlet
2. Door is open, which inhibits fill mode.
water and door"
3. Faulty door switch.
"F9 Service needed,"
1. Incoming power not properly connected.
"Check incoming
power"
2. L3 is missing (3-phase units only).
1. Faulty temperature input (T1) on IO
module.
2. Faulty temperature probe (T1).
"F10 Service needed,"
"Check wash tank
3. Faulty high-limit switch.
thermostat and high
limit"
4. Faulty wash heater.
5. Wash-heater contactor not energizing.
F11 Service need-
ed –check wash tank
Faulty temperature probe (T1).
thermostat
07610-004-29-29-A
TROUBLESHOOTING
REMEDY
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.
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.
1. Replace faulty solenoid or fill relay.
2. Close door to activate door switch.
3. Replace or adjust door switch.
1. Check connections to heater.
2. Verify that L3 is present and connected properly.
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.
Replace probe that connects to P10.
20
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