Tuttnauer 1730E, Operation & Maintenance Manual

Page: 23 / 57

21
Low Temp. Message is displayed, fail indicator lights and cycle is
aborted, if the temperature drops 2.5

C (4.5

F) below the
required sterilization temperature.
Possible causes:

Insufficient water in the chamber (see Low water message).

Sterilization time has been set for too long a period.

A bad temperature sensor.
High Temp. Message is displayed, fail indicator lights and program is
aborted if one of the following occurs:

The temperature rises to 3

C (5

F) above the required
sterilization temperature during the sterilization stage.

This message appears during the HEAT stage, if the
temperature sensor is damaged.
Possible causes:

A damaged solid state relay.

A damaged heating element.

A damaged temperature sensor.
Low Water Message is displayed; if during the Water Inlet stage,
insufficient water enters the chamber. In units with water
pumps, the pump will try three times to fill the chamber with
water, if unsuccessful the cycle is aborted and the message
LOW WATER is displayed.
Message is displayed, if during a normal heat up stage the
system determines that there is insufficient water in the
chamber to complete the cycle. This determination is made by
the combined input of two sensors, the Water Electrode and
the Safety Thermostat. Also, if a power failure occurs during
the heat or sterilization stage after the power returns, the
system will check the Water Electrode to see if there is
sufficient water in the chamber in order to resume the cycle. If
not, the cycle will be aborted, the message LOW WATER
will be displayed, and the Cycle Fail indicator will light.
Possible causes:

A dirty or shorted Water Electrode.

A clogged water pump or water pump filter.

A clogged water line.

Unit is improperly leveled.

The Air Outlet Valve is stuck closed.

A leaky door gasket, door bellows, solenoid valve, safety
valve, or the air jet is allowing steam to escape at a higher
than normal rate.

A power down has occurred and on power up the water
electrode tip is dry.