Convotherm Mini Combi with Easy Touch, Service And Parts Manual

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e When the condensate box is heated to 140 degrees F at the B3 probe, 220 VAC is
sent from terminal 5 of connector X12 to the condenser valve (Y1) until the
temperature drops.
f If the “Crisp and Tasty” mode is selected
• 12 VDC is sent from terminal 9 of connector X13 on the Control Board (A10)
to the Dehumidification Valve (M2) to pull the humidity out of the cabinet.
◊ In the light and medium modes (one and two drops in the display) the M2
valve will be energized until the valve is open to approximately 30 and 60
degrees..
◊ In the full mode (3 drops in the display) the M2 valve will be energized
until the valve opens 90 degrees.
g When the Pre-heat timer counts to 0
• The alarm sounds until the operator opens the door.
• The Combi cycle begins and the process starts at 5-b again until the Cook
timer counts to 0.
6 With the combi in the Rethermalization mode with time on the timer, the door closed
and the start icon depressed
a
The front display will include a Thermometer while the unit preheats.
b The fan circuit is energized
• Voltage is sent from terminals 7 and 9 on connector X14 on the Control Board
to the terminals S and R respectively on the AC drive board for 2 minutes.
◊ The AC drive board ramps up the oven fan motor (M1) Clock wise for 2
minutes.
• Voltage is removed from the AC Drive for 15 Seconds
• Voltage is sent from terminals 7 and 8 on connector X14 on the Control Board
to terminals S and F respectively on the AC drive board for 2 minutes.
◊ The AC drive board ramps up the oven fan motor (M1) Counter-clock
wise for 2 minutes.
• If Voltage is sent from terminal 10 on Connector X14 on the control board to
terminal M on the AC drive board the fan will turn in reduced speed.
• NOTE: If the door switch (S7) opens by the door opening, then the fan circuit
is de-energized.
c The hot air heat circuit is energized
• 220 VAC is sent from terminal 3 of connector X12 on the Control Board
(A10) to the coil of Contactor K4 until the cabinet reaches the set temperature
as sensed at probe B6.
◊ The contactor K4 closes and 220 VAC is sent to the element (E4)
d The steam circuit is energized
• 220 VAC is sent from terminal 4 of connector X12 on the Control Board
(A10) to the coil of the Y4 solenoid allowing water to be thrown against the
element for 10 seconds every 40 seconds.
e When the condensate box is heated to 140 degrees F at the B3probe, 220 VAC is
sent from terminal 5 of connector X12 to the condenser valve (Y1) until the
temperature drops.
f When the Pre-heat timer counts to 0
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