5
•
To initiate a manual defrost cycle: press and
hold the “Manual Defrost Key” for more
than 2 seconds.
Note:
Manual Defrost will not initiate unless the
unit is at standard operating temperatures.
Electronic Control Operation:
The electronic control combines the functions of
both the mechanical thermostat and defrost timer
into a single control. The control also offers the
consumer the capability of monitoring the
operational status of the freezer via the icon and
digital temperature display (located on the face of
the control). The controls have been programmed
by Leer to operate the freezer within the design
parameters of the refrigeration system. The set-
point (cut-out) has programmed parameters for -12°
F, with a differential of 6° F. Should the user desire
to alter the Set-Point, the new set-points should not
/- 4° of the original factory setting. Do not
alter any of the programming parameters in the
controls without first consulting with Leer.
Auto-Defrost Control:
The AD control is
located under the condensing unit cover and
contains two thermal-couple probe wires. Both
probe wires are routed through the cabinet’s suction
line hole and into the unit cooler assembly, which is
mounted to the interior ceiling of the cabinet. The
Red Air Sensing Probe (“P1”) routes through the
unit cooler and has its’ sensing bulb secured to the
outer, left-hand wall of the unit cooler. Probe “P1”
monitors the air temperature in the freezer at that
location. During the normal operation of the
control, the digital display will show the cabinet
temperature at the probe “P1” location. The Black
Probe “P2” is inserted into the finned section of the
evaporator coil, near the top of the unit cooler
assembly. This probe monitors the temperature of
the evaporator coil during the defrost cycle.
Possible Displayed Alarm Codes:
“P1” – Air Probe failure: The control will override
the “P1” functions and cycle the compressor for 17
minutes, until the probe fault can be corrected.
“P2” – Evaporator Probe failure: The control will
override the “P2” function and operate with a timed
defrost cycle, until the probe fault can be corrected.
“HA” – Maximum Temperature Alarm: The cabinet
air temperature has exceeded programmed
temperature for a period exceeding 15 minutes. The
alarm will continue to display until the cabinet
temperature drops below maximum levels.
“LA” – Minimum Temperature Alarm: The cabinet
air temperature has dropped below the programmed
minimum. This alarm will continue to display until
the cabinet temperature rises above the minimum
level.
Note
: Should a “P1” or “P2” alarm occur, check the
probe wire connections to the control prior to
replacing the probe wire.
For more detailed information regarding the
Electronic Control programming and instructions,
please contact: Leer, Inc. Merchandiser Division
Customer Service. Phone: 800-766-5337. Contact
information is available on our web-site at
http://www.leerinc.com/ice-
merchandisers/merchandiser-sales-distributors/
Loading Product:
The freezer should be pre-
chilled prior to loading with product. Pre-chilling
will aid the freezer in reaching storage temperature
at a faster rate once loaded and reduce the risk of
melting product.
Do not over fill the freezer! Leave room for air
flow. Do not stack product high enough to block off
the evaporator fans in the unit cooler assembly. The
evaporator fans are intended to pull warm air
entering the cabinet into the unit cooler and then
push that warm air across the surface of the
evaporator coil. This process removes the heat prior
to distributing the air into the cabinet.
If the unit has air ducts, avoid stacking product
above the top edge of the air ducts that are installed
on the walls of the cabinet interior. Blocking off
these air ducts may restrict the even distribution of
