Dairy Tech Matilda - 7. Matilda Will Not Cool:; 8. Colostrum is Separated or Congealed:; 9. Stir Motor is NOT Turning:

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7. Matilda® Will Not Cool:
At the end of the heating and time-out cycle, the
cooling solenoid valve should automatically open and
allow cool water into the machine.
a. Make certain the discharge drain is not blocked,
kinked or obstructed with back pressure of any kind.
b. Make certain the cold-water supply to the unit is
always on. It is common to find that someone has
shut the valve not knowing its importance.
c. Check the cooling solenoid valve.
d. Troubleshoot valve by pressing SETTINGS – TEST –
then WATER VALVE. Is there power to the solenoid
valve? If the power is on and the machine has water
but it will not flow, replace the valve.
i. No power to the valve? Check for power at the
water valve terminals on the power board.
Replace if necessary.
e. Check the water supply to make sure screens and
filters are free from debris and kinks in the hoses.
8. Colostrum is Separated or Congealed:
The most common cause for colostrum to separate or
congeal is acidification. Fermentation of the
colostrum by bacteria will cause the release of lactic
acid and other acidic by-products resulting in a lower
pH. This in turn allows it to separate. The heat of
pasteurization will exacerbate this problem.
a. To control this, cool the colostrum during holding
stages or pasteurize the colostrum sooner after
collection to prevent the start of fermentation.
b. Temperatures that are too high (rarely a problem
since our units cannot superheat water).
9. Stir Motor is NOT Turning:
Make certain that the wires to the motor have not
been damaged or pulled out of the bridge board.
a. If there is power to the motor and it will not turn,
replace the motor.
b. If there is no power to the motor, check the control
screen for errors.