Hussmann Chino MPC-ET Series, Installation & Operation Manual

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14
Safenet III Operation
TEMPERATURE ADJUSTMENT
Rotate the adjustment knob counter clockwise for a
warmer set point or clockwise for a colder set point.
• While the temperature is being adjusted, the op-
tional display shows the set point (cut out value). A
few seconds after the temperature is set, the display
reverts to showing the sensed temperature in the
merchandiser.
ALARMS AND CODES
FLASHING TEMPERATURE OR SENSOR ALARM LED,
E1 OR E2
If the Temperature or Sensor Alarm LED (red) on the
controller and display is flashing, a temperature sensor
has failed. The display shows E1 if the case sensor has
failed or E2 if the evaporator sensor has failed.
If the merchandiser sensor fails, refrigeration will run
continuously. Turn off, or repeat a duty cycle of a few
minutes on and a few minutes off.
DEFROST TERMINATION SWITCH
Merchandisers may use a defrost termination switch,
instead of an evaporator sensor to terminate a defrost
cycle. The defrost termination switch is temperature
activated and senses the completion of defrost.
Compressor
Off Time If
Sensor Failed
Compressor
Status
Compressor
On Time If
Sensor Failed
Off
Off
Time
On Off On
MANUAL DEFROST
Note location of
knob setting
Warm Cold
Warm Cold
Warm Cold
1.
Rotate knob fully
counterclockwise
until it stops (full
warm- “OFF” position)
2.
After 10 seconds, but
before 20 seconds,
rotate knob fully
clockwise until it
stops (full cold position)
3.
Note:
This procedure initiates
a manual or forced
defrost
IMPORTANT : Return the control knob to its original
setting (Step 1) once the manual defrost has been
initiated.