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3.3. TEMPERATURE CONTROL FAILURES
FAILURE
1
The temperature does
not reach the set
temperature
2
The temperature
exceeds the set
temperature.
3
The error "LID OPEN"
lightens on the display.
4
The error message "OFF" Power is cut during the
appears on the display.
5
The error message "H01"
appears on the display.
6
The error message "H02"
appears on the display.
7
The error message "H03"
appears on the display and PCB outlets continuously.
"OVERPRESSURE" led
lightens.
PROBABLE CAUSES
The main PCB SSR terminal
does not outlet.
The heater is defective.
The safety thermostat does not Check that the terminals are short-circuited with
allow for heating.
The main PCB SSR terminal
outlets continuously.
There is short-circuit in the
heater connection cables.
The SSR outlets continuously.
The lid is forced to open
during the operation.
The lid locking switch is
defective.
operation.
Temperature sensor endings
are broken or they are
connected to the main PCB
loosely.
Electronical failure occured.
The SSR terminal of the main
There is short-circuit in the
heater connection cables.
The SSR outlets continuously.
Check the SSR terminal outlet with a
multimeter. If there is no outlet (12 VCD),
replace the main PCB.
Check the resistance values of the heater
with a multimeter. If the heater is defective,
replace it.
a multimeter. If there is no short-circuit,
replace the safety thermostat.
Check the main PCB SSR terminal outlet with a
multimeter. If there is continuous outlet (12 VCD)
replace the main PCB.
Check the connection cables. If there is
short-circuit, correct it.
Check the SSR terminals. If there is
continuous outlet, replace the SSR.
Repeat the sterilization operation
after the current operation has finished.
Check the switch and replace it if it is
defective.
Repeat the sterilization.
Check whether the endings are connected well
to the main PCB. Connect them properly if
needed.
Check whether the endings of the temperature
sensor are broken. Replace the TC1 if they are
broken.
Replace the main PCB.
Check the SSR terminal outlet with a multimeter.
If there is continuous outlet (12 VCD) replace the
main PCB.
Check the connection cables. If there is
short-circuit, correct it.
Check the SSR terminals. If there is
continuous outlet, replace the SSR.
11
SOLUTION
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