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I
2-6
nstallatIon
ALARMS AND CODES
F
T
lashing
emperaTure or
leD, e1
e2
or
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, the refrigera-
tion will switch to a duty cycle operation. During
duty cycle operation, the refrigeration system
will cycle on and off until the sensor is serviced.
The graph below shows an example of duty cyle
operation during a case sensor failure.
P/N 3003960_A
s
a
ensor
larm
U.S. & Canada 1-800-922-1919 • Mexico 1 800-890-2900 • www.hussmann.com
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.
MANUAL DEFROST
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.
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