P/N 0515258_N
3-1
HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A.
SHM Merchandisers
START UP / OPERATION
CONTROLLER OPERATION
The electronic controller is located in the cas-
sette compartment. The controller comes factory
set, and is ready for use. The front grille must
be removed in order to access this control.
When removing the grille for this operation or
for condenser cleaning, care must be taken not
to damage the display interface cable. It may be
unplugged during this task.
1. Plug the merchandiser plug into its recepta-
cle.
a. The controller display will illuminate.
b. The interior light will illuminate.
2. After the control preprogrammed time delay
of up to 6 minutes, the compressor and evapo-
rator fan(s) will start if the control is calling for
cooling.
3. The control will cycle the compressor but
may also cycle evaporator fan(s) on and off
determined by the Set-Point and Differential
temperatures.
a. The Set-Point is the adjustable
preprogrammed temperature.
b. The Differential is the non-adjustable pre
programmed temperature.
c. The Control is designed to read and
display a cabinet temperature not a product
temperature.
This cabinet temperature may reflect the re-
frigeration cycle of the Set-Point and it’s Dif-
ferential. The most accurate temperature on
a cabinets operation is to verify the product
temperature.
Taking as an example a VRL case, freezer, If
the Set-Point is -12°F and the Differential is
9°F. (Set-Point) -12°F + 9 (Differential) = -3°F.
The compressor and evaporator fan(s) will cycle
off -12°F and back on at -3°F.
Main Features:
• Panel-mounted
• Energy saving algorithms and optimised de-
frost control
• 8 preloaded applications
• Defrost at single / double evaporator
• Frame Heater
• Local network auto-configuration
• Direct load connection (up to 2 HP)
• Supply voltage control LVD
• Presence of an open collector output
RTN400
Page 17/130
KDEPLUS BUTTONS
The
KDEPlus keyboard has 4 keys, as shown in the illustration:
1
2
3
4
Each key has a different function depending on whether it is:
• Pressed and released
• Pressed for at least 5 seconds
• Pressed and held at start-up
• Pressed in combination with another key.
KEYS
The following table summarizes the function of each key:
No
Key
Action
Pressed and released
Press for at least 5 secs
Start-up
1
• Scrolls through menu items
• Decreases values
Activates the
Manual Defrost function
(from outside menus).
---
2
• Scrolls through menu items
• Decreases values
Function can be configured by the user
(from outside menus).
(see parameter H32)
---
3
• Returns to the previous menu
level
• Confirms parameter value
Activates the Stand-by function
(from outside menus).
---
4
set
• Displays any alarms
(if active)
• Opens Machine Status menu
• Confirms commands
Opens the Programming Menu
(User and Installer parameters)
When pressed during
start-up it enables
the user to select the
application to be loaded.
STANDBY or ESC
DOWN
SET
UP
