Avantra 36/44 Service Manual
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X1, X2–Input to trigger circuit (plug-in unit) of Triac channels and coils of
power relays.
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X3 pins 1 and 2–10 VAC input for 12 VDC unregulated power supply.
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X3 pins 3 to 4–DC output (12 V) to electrical and condensation fans.
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X2–Safety switches connection. Open=> no power to trigger circuit and
relay coils.
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F, N (Phase, Neutral) Same as L1/L2–See the electrical diagram Triac/Relay
PCB.
Main power input terminals. The power source may have 2, 3, 4 wires
including ground.
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1–57, printed circuit board terminals–Switched output to water solenoid
valve, heating elements, blower, circulation, replenishment pumps, main
motor, and step-down transformer.
2.3.2 The LUTH Power Board (LPB)
The Luth Power Board switches the necessary 2230V components on and off.
The LPB pcb includes:
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Five long life zero cross Triac channels (only four are used)
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Seven power relays with noise suppression circuits aross the contacts (only
six are used)
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220V AC power supply to he prim. of the 24V AC transfo for the LMB02
and the crane hoist transfo
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Voltage supply for the six safety switches. Four are for the top cover's wet
and dryer sections; two are the the front box (table lid) only in the latest
OLP version.
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Two diodes for the half-wave rectified AC replenishment pumps.
2-6 Functional Analysis