T7-94-01 Page 3
Internal use only
2.2.3 Heater fault [Er:03]
The water temperature in the machine is measured by an NTC (negative temperature coefficient).
At heating steps, if the temperature rise is less than 1 °C within 3 minutes heating fault occurs.
When the fault detected software skips the heating step and continues the program
with the next step.
Possible reasons:
a. Malfunction of heater
b. Malfunction of NTC (constant NTC resistance)
c. Cable harness errors
e. Faulty electronics
Note: During the first 3 minutes of a heating step the water temperature is not controlled. The
control system waits so that the temperature inside the machine reaches balance.
2.2.4 Turbitiy fault [Er:04]
Turbidity sensor is the component that measures the amount of dirt in the water. The machine
uses this data for the steps of Auto Program (if applicable). If the proper data from the turbidity
sensor cannot be received, Turbidity Sensor Error occurs.
When the error occurs, the software continues the program as heavy dirt level.
Possible reasons:
a. Malfunction of Turbidity Sensor
b. Cable harness errors
c. Faulty electronics
2.2.5 Position error Valve Spray arm control [Er:05]
The spray arm valve is the component that diverts the water flow between the upper and lower
trays. Position of the valve is checked by the main board. The position error occurs if the proper
position signal could not be received from the valve.
When the error occurs, the electronics drives the valve until proper position signal is achieved.
Possible reasons:
a. Malfunction of spray arm control valve
b. Cable harness errors
c. Faulty electronics
