Service In-
spection
Mode
Press the Delay Start +
Normal + Power keys
at the same time
“ALL” is displayed for the first three (3) seconds and then “t1” You can
change the mode by pressing the Normal key. Each time the Normal key is
pressed, the mode changes in the order of t1 t2 t3 t4 t5
t6 t7 t8.
Mode Related parts Symptoms Activate Mode Live Test Notes
t1
Inlet valve, Flow
Meter, Low Level Sen-
sor
4E error
9E error
If you press the Delay Start key, water
is drained for 45 seconds and then the
water supply starts.
If the pulse count is more than 660,
change the mode.
Make sure to change the mode when
the pulse count is more than 660 in t1
mode.
Water fill in approxi-
mately 70 seconds
average water pres-
sure, fills to about 1"
past heater shield
(very little water
showing in unit)
t2 Circulation Motor
Nozzle does
not spray
1. Press the Delay Start key to start or
stop the pump.
2. If a low water level is detected, water
is supplied again and the operation
continues.
Place some cups on
racks and run circu-
lation pump to verify
water distribution in
tub.
t3
Circulation
Motor, Heater, Ther-
mistor
HE error
1. Press the Delay Start key to start or
stop heater and circulation pump.
2. If a low water level is sensed, water
is supplied again and the operation
continues.
3. The current temperature is shown on
the display.
4. It operates up to 70ºC.
After temp increases
2 degrees C, time is
about 50 seconds
for each degree C
increase
t4 Fan Motor
Fan Motor not
working
Press the Delay Start key to start or
stop the fan motor.
Listen for fan run-
ning
t5
Drain Pump,
Low Level
Sensor
5E error
1. Press the Delay Start key to start the
2 parts.
2. “t5” starts blinking while water is be-
ing drained.
3. When draining is finished, “t5” is dis-
played without blinking.
pump out is approxi-
mately 30 seconds
t6
Low Level
Sensor
Display error
when
turning Micro
S/W
on/off
1. MICRO SWITCH On
The sensing state is displayed
as ‘On’ on the display.
2. MICRO SWITCH Off
The sensing sta
te is display
ed as
‘OFF’ on the display.
t6 to OFF with no
water – t6 to ON with
water
t7 Thermistor
No change in
water temp
The current temperature is displayed.
Actual temp C of wa-
ter in sump
t8
Synchronous Motor,
Micro S/W
PE Error
1. If you press the Delay Start key, the
parts operate just once.
2. There is no stop function.
3. While the synchronous motor is op-
erating, its sensing state is displayed
as On/OFF on the 88 segment display.
4. When the synchronous motor stops,
the sensing state (On/OFF) of the micro
switch is displayed.
ON 8 seconds, OFF
4 seconds
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