Maytag Built-in Refrigeration, Manual

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Jenn-Air
®
Luxury
™
Line of Refrigerators Technical Orientation
Do Not remove or install the Climate Zone Technology (CZT) drawers with power
applied to the system. Always disconnect the main power before relamping or removing a
CZT assembly. Main power can be disconnected by switching the main power switch to
the OFF position.
The Jenn-Air
®
Luxury
™
Line of Refrigerators MUST be secured to prevent the
possibility of tipping. With the short footprint (24 inches) and long doors it would be easy
for heavily loaded doors to create an unbalanced situation. If the system is installed into
an opening less than one inch higher than the cabinet, the opening itself can be used to
prevent tipping. If the area above the unit is open to the ceiling, an anti-tip bracket must
be installed. Use the leveling system to tighten the cabinet against the anti-tip bracket.
System Overview
The Jenn-Air
®
Luxury
™
Line of Refrigerators incorporates solid state control of all
functions. All components in the system are controlled by the Main Control Board.
There is a major division between the components used with this refrigeration product.
Many of the components are considered low voltage components while the remaining
components are powered by the line voltage. (120VAC).
One unified wiring diagram has been created for all versions of this product. When
viewing the diagram, all components connected to the left side of the Main Control Board
are powered by DC low-voltage. The components connected to the right side of the board
are powered by 120VAC.
This means that the fresh food and freezer fans as well as the damper and CZT
assemblies are all powered by DC. With this many DC components included in one
product a robust power supply is needed. The power supply is shown in the unified
wiring diagram just below the compressor in the upper right quadrant of the drawing.
DC Power Supply
The DC supply is powered by line voltage and pr12VDC and +26VDC to the
appliance. All DC measurements must be referenced to the DC ground. The +12 VDC
supply is provided through a black wire with a white tracer (BLK/WH), any place
throughout the cabinet that a BLK/WH wire is found it will be the +12VDC supply. The
black wire with red tracer (BLK/RD) is the +26VDC supply. Anywhere the BLK/RD
wire is used it is the +26VDC supply. The black wire with the green tracer (BLK/GR) is
the DC ground. It is important that any DC measurements are referenced to this line when
diagnosing the refrigeration control system.
Since a consistent color scheme is used throughout the cabinet it is very easy to
determine the supply voltage for the DC components. Starting from the top on the left
side of the Main Control we find that +26 VDC is supplied to the water filter and by-pass
cap switches as well as the door switches. The display PCB and customer control panel is
powered by +26VDC. The fresh food stirring fan and the freezer fan (evaporator fan) are
powered by +12VDC. The CZT drawers are supplied with both +12VDC and +26VDC.