American Dryer Corp. Phase 6 Microprocessor Controls ML-190HS - Manual (Page 14)

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SECTION IV
DESCRIPTION OF PARTS
A. CONTROL PANEL (MICROPROCESSOR)
Lifting the control door will reveal the control
panel assembly. Opening the control panel will
allow access to the major components which
include the computer board and keyboard
(touchpad). The keyboard (touchpad) inputs
to the computer what temperature and
program has been selected. The computer
controls the entire operation of the machine.
It accepts inputs and gives outputs to various
parts throughout the machine.
B. CONTROL BOX
Lifting the control door and opening the
computer panel will reveal the control box.
Inside the control box are ALL the electronic
control components. Located on the back of
the control box is the computer. Included in
the control box are the 30-position terminal
block, fuse block, and transformer.
C. HSI MODULE (Gas Models ONLY)
The HSI (Hot Surface Ignition) system consists
of a microprocessor-based control module, along
with an ignitor and flame-probe assembly. This
control utilizes a HSI (Hot Surface Ignition) ignitor
and a rectified flame sensor/probe signal to locally
control ALL basic functions in the gas burner.