Traulsen centerline CLUC-27R-SD Owner's Manual page 12

PAR RANGE DESCRIPTION
SPL -58..SPH Minimum limit for SP setting.
SPH SPL...180° Maximum limit for SP setting.
SP SPL... SPH Setpoint (value to be maintained in the room).
C-H REF; HEA Refrigerating (REF) or Heating (HEA) control mode.
HY0 1...10° Thermostat OFF -> ON differential.
HY1 0...10° Thermostat ON -> OFF differential.
CRT 0...30min Compressor rest time. The output is switched on again after CRT minutes have elapsed since
the previous switchover. We recommend to set CRT=03 with HY0<2.0°.
CT1 0...30min Compressor/Heater output run when probe T1 is faulty. With CT1=0 the output will always remain
OFF.
CT2 0...30min Compressor/Heater output stop when probe T1 is faulty. With CT2=0 and CT1>0 the output will
always be ON.
Example: CT1=4, CT2= 6: In case of probe T1 failure, the compressor will cycle 4 minutes ON
and 6 minutes OFF.
DFM NON; Defrost start mode
TIM; NON : defrost function is disabled (the following parameter will be FCM).
FRO TIM : regular time defrost.
CRN FRO : the defrost time count is only increased when the conditions occur for frost to form on the
evaporator (optimized time increase).
CRN : defrost is based off of compressor run time (time is based off of DAT).
DFT 0...250 Time interval among defrosts in x10 minutes. When this time has elapsed since the last defrost, a new
defrost cycle is started. Each number is multiplied by 10 minutes. 0-250 indicates 0-2500 minutes.
DAT 0...100 Frost accumulation timeout.
hours
DFB NO/YES Defrost timer backup. With DFB=YES, after a power interruption, the timer resumes the count from
where it was left off with ±30 min. approximation. With DFB=NO, after a power interruption, the
defrost timer will re-start to count from zero.
DLI -58...180° Defrost end temperature.
DMD 0...30min Minimum defrost duration.
DTO 1...120min Maximum defrost duration.
DTY OFF; ELE; Defrost type
GAS
OFF: off cycle defrost (Compressor and Heater OFF). ELE: electric defrost (Compressor OFF and
Heater ON). GAS: hot gas defrost
(Compressor and Heater ON).
DSO OFF; Defrost start optimization
LO; OFF : no optimization.
HI LO : defrost waits until the compressor cut-out.
HI : defrost waits until the compressor cut-in.
SOD 0...30 min Start optimization delay.
DPD 0...240sec Evaporator pump down. At the beginning of defrost, defrost outputs (determined by DTY) are
OFF for DPD seconds.
DRN 0...30min Pause after defrost (evaporator drain down time).
VI. CONTROL BASICS (continued)
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