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Use and maintenance manual
T450 - T650E - T650EF - T650 - T650F
ENGLISH
PROBLEM 11: Lack of one phase on power supply:
Solution:
• Make sure that all the three phases come from the mains.
• Check the cables connection; connect them again, if necessary.
PROBLEM 101:Wrong temperature sensor:
Solution:
• Turn off the power supply.
• Make sure that the earth connections are correct (those of the supply mains too);
• Make sure that the sensor's connection terminals are well shut.
• If the problem continues replace the board.
PROBLEM 102:Temperature sensor at maximum value:
Solution:
• Turn off the power supply.
• Make sure that the earth connections are correct (those of the supply mains too);
• Make sure that the sensor's connection terminals are well shut.
• If the problem continues replace the board.
PROBLEM 103:Temperature reading sensor unstable:
Solution:
• Turn off the power supply.
• Make sure that the earth connections are correct (those of the supply mains too);
• Make sure that the sensor's connection terminals are well shut.
• If the problem continues replace the board.
PROBLEM 104:Temperature regulation zone out of the rated range of regulation:
Solution:
• Check if the heating resistors are operating correctly.
• Check that there is no voltage on the resistors in the free passage mode, the
possible presence of voltage on some resistors indicates that the static relays are
broken.
• Check that the card operates correctly at a lower temperature: if the operation is
regular the problem is put down to a wrong regulation.
• If the problem continues replace the card.
PROBLEM 105:Temperature of more than 20°C, as compared to the preset value:
Solution:
• Set the oven properly:
• Check if the heating resistors are operating correctly.
• Check that there is no voltage on the resistors in the free passage mode, the
possible presence of voltage on some resistors indicates that the static relays are
broken.
• Check that the card operates correctly at a lower temperature: if the operation is
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