Mocom millennium B, Service Manual, Page: 146 / 285

Rev. 1
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38
A 112
LCD INDICATION Alarm description Effect/Signaling Possible cause / Check Proposed solution
PT2
SHORTCIRCUIT
Short-circuit in the PT2
probe
The PT2 probe reads a
temperature lower than 1°C
Unstable connection of the PT2 wiring. Restore the wiring connection.
PT2 wiring out from the board connector. Restore the wiring connection on the board.
PT2 probe in short-circuit Replace the PT2 probe - see card Gr1-9
PT2 probe uncalibrated
Perform the calibration – see Attachment N
Too low environmental temperature in the
installation or storage site. Move the sterilizer in a different installation or storage site
with higher environmental temperature.
Check the wiring of the level sensor for the
external used water tank.
Disconnect the wiring on the CPU board
Check the ground connection of the
sterilizer.
Clean the ground connections.
Replace the damage ground connection.
Sterilizer connected through a power strip.
Remove the power strip and connect the sterilizer as
recommended (see Operating Manual).
Check the electrical system of the room
Conform the ground connection to the standard.
Conform the electrical system to the standard.
Possible data memory fail.
Perform CPU board calibration – see Attachment N
Replace CPU board – see card Gr1-1
Data memory reset.
Replace CPU board – see card Gr1-1 -
CPU board replaced without performing the
calibration.
Perform CPU board calibration – see Attachment N
Replace CPU board – see card Gr1-1
Lost of calibration
Perform CPU board calibration – see Attachment N
Replace CPU board – see card Gr1-1 -