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10
Reprinted with permission from Paragon Commercial Refrigeration Controls.
Example — To set one defrost per day at 11:59 PM
• Press and hold SET and DOWN for 10 seconds
• Press DOWN five times to get to go to the Defrost Inverval
(dFIn)
• Press SET to change the parameter
• Press DOWN until tdAy
appears on the display
• Press SET to accept the option
• Press DOWN seven times to go to the Number of Defrosts
(noDF)
• Press SET to change it
• Press UP or DOWN until
1 appears on the display
• Press SET to accept the change
• Press DOWN to go to Defrost Start Time (
dEF1)
• Press SET to change the time
• Press UP or DOWN until the 11:59 PM appears on the
display
• Press SET
• Press DOWN ten times to exit the programming level
Table 8. Error Codes
Display Control Status
Er 1 ERC Fault — software or hardware failure
Er 2 ERC Communication Fault — indicates that there is a problem with the display module cable
Er 3 Zone Sensor Fault — indicates an open or shorted temperature sensor
Er 4 Evaporator Sensor Fault — indicates an open or shorted evaporator sensor
Er 5 ERC Fault — software or hardware failure
Er 6 Low Temperature Alarm — indicates that the temperature has dropped below the low alarm setpoint
Er 7 High Temperature Alarm — indicates that the temperature has gone above the high alarm setpoint
SENSOR FAILURE: If the zone temperature sensor fails, the control
will use the cycle times it recorded for the last three cycles to control
the equipment (based on time). Therefore the food will be preserved
in case of failure.
If the evaporator sensor opens or fails, the control will terminate the
defrost cycle based on time. It is recommended that the evaporator
(defrost) sensor be disconnected from the control until a new one
can be installed (see page 16, for parts list). This will ensure that
the control will terminate the defrost cycle based on time. Always
disconnect power before servicing the unit.
2. Freezers
Small Cabinet Freezers
Freezer Defrost Control
The small cabinet freezer models come equiped with a
preset mechanical defrost timer.
1. The system will initiate the defrost cycle every
six hours after the first one. The first defrost cycle
may begin in less than six hours from power up.
2. It will remain in defrost for a period of 20 minutes.
3. Defrost termination is based on time only. After
20 minutes has elapsed the defrost heate will de-
energize and the compressor and evaporator fans
will energize and begin the cooling cycle.
4. These settings are non-adjustable.
For Error Codes 1, 2 and 5 cut the power to the unit and
correct the problem to reset the display. For Codes 3
and 4, press the UP or DOWN button on the display to reset
the error message. If the display still shows the message, the
sensor must be replaced.
The Error Codes 6 and 7 will be automatically reset once the
temperature is back within the two setpoints.
Freezer Thermostat
The small cabinet freezer has a mechanical thermostat
which may be adjusted. A "straight up" adjustment knob
position is generally correct for a 0°F. box.