Traulsen centerline CLUC-27R-SD, Owner'S Manual

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VI. CONTROL BASICS (continued)
VI. c - INITIATING A DEFROST
Automatic defrost:
Defrost starts automatically as soon as the time set with
parameter
DFT has elapsed.
• Timed defrost: With DFM = TIM defrosts take place at
regular intervals when the timer reaches the value of
DFT . For example, with DFM = TIM and DFT = 36, a
defrost will take place every 6 hours.
• Optimized defrost: With DFM = FRO the timer is only
increased when the conditions occur for frost to form
on the evaporator, until the time set with parameter
DFT is matched. If the evaporator works at 0°F, defrost
frequency depends on the thermal load and climatic
conditions. With setpoints much lower than 0°F, defrost
frequency mainly depends on the refrigerator operating
time.
• Defrost time count backup: At the power-up, if DFB =
YES, the defrost timer resumes the time count from
where it was left off before the power interruption. Vice
versa, with
DFB = NO, the time count re-starts from 0.
In stand-by, the accumulated time count is frozen.
Manual or remote defrost start:
It’s possible to manually start a defrost, by pressing button
for 2 seconds.
Defrost type. Once defrost has started, Compressor and
Defrost outputs are controlled according to parameter
DTY . If FID = YES, the evaporator fans are active during
defrost.
Defrost termination. The actual defrost duration is
influenced by a series of parameters.
• Time termination:
T2 = NO and T3 different from 2EU:
the evaporator temperature is not monitored and defrost
will last as long as time
DTO .
• Temperature monitoring of one evaporator: T2 = YES
and T3 different from 2EU. In this case, if the sensor
T2 measures the temperature DLI before the time DTO
elapses, defrost will be terminated in advance.
VI. c - INITIATING A DEFROST (cont’d)
Resuming thermostatic cycle:
When defrost is over, if DRN is greater than 0, all outputs
will remain off for DRN minutes, in order for the ice to melt
completely and the resulting water to drain. Moreover, if
probe
T2 is active ( T2 = YES), the fans will re-start when
the evaporator gets to a temperature lower than FDD ; Vice
versa, if probe T2 is not active ( T2 = NO) or after defrost
has come to an end, such condition does not occur by end
of the time
FTO , after FTO minutes have elapsed the fans
will be switched on anyway.
Caution: if
DFM = NON or C-H = HEA all defrost functions
are inhibited; if DFT = 0, automatic defrost functions are
excluded.
VI. d - CONFIGURATION PARAMETERS
Parameter Configuration:
• To get access to the parameter configuration menu,
press button and for 5 seconds.
• With button or select the parameter to be
modified.
• Press button to display the value.
• By keeping button pressed, use button or to
set the desired value.
• When button is released, the newly programmed
value is stored and the following parameter is displayed.
• To exit from the setup, press button or wait for 30
seconds.