Nor-Lake Angled Ice Cream Merchandisers - Manual (Page 7)

7
DIXELL ELECTRONIC REFRIGERATION CONTROL
OPERATION
Compressor When power is first turned on to the control, the LED indicator under COMP on the display
starts blinking. After one-minute delay the compressor comes on. The COMP LED indicator stays on while
compressor relay is energized. Display will show actual box temperature. Figure 4 is the display layout.
The compressor will be cycled off when the actual box temperature reaches its set point. The COMP
indicator will be off.
Fig. 4 – Display Lay-out
Fan
The fans will run constantly except when a defrost is initiated, or when the evaporator temp is above
the 30 o F. When in defrost mode the fan is off until the end of the defrost and the 2 minute drip time has
passed. There is 4 minutes delay after a defrost before the fan comes on. The difference of the evaporator
and room temperature of more than 9
o F will override the fan delay. FAN LED indicator is on while FAN relay
is energized.
Defrost
The control uses demand defrost with at least one defrost per day for oil return safety. The
control can be used for scheduled defrost. A programmed “HOT-KEY” has to be used to re-set the defrost
scheme for special applications. During defrost the display will show dF and the LED indicator under dF in
on.
MANUAL DEFROST
1. Push this DEFROST key for more than 2 seconds and a manual defrost will start.
2. While in defrost, Push and hold the DEFROST key for more than 5 seconds and the
controller will end the defrost cycle. The controller will then enter drip mode for 2 minutes. The dF led
is flashing in drip mode.
HOW TO SEE THE SETPOINT (Box temperature cut-out)
1. Push and immediately release the SET key: the display will show the Set
point value;
2. Push and immediately release the SET key or wait for 5 seconds to display the probe value
(actual box temperature) again.
HOW TO CHANGE THE SETPOINT
1. Push the SET key for more than 2 seconds to change the Set point value;
2. The value of the set point will be displayed and the LED under COMP starts blinking;
3. To change the Set value push the UP ▲ or DOWN▼ arrows within 10s.
To memorize the new set point value push the SET key again or wait 10s.