A52x Series Electronic Refrigeration Controller with Adaptive Defrost Technical Bulletin
37
Select the preferred sensor or no sensor. To save the selection,
press
SET.
A99
,
NTC, or
NON
A99
To go to the
Sn2: OFFSET
selection screen, press
SET
. No
selection
Select a temperature offset value for Sensor 2 between -2.5C°
and 2.5C° (-5F° and 5F°). To save the selection, press
SET.
-2.5C°
–
2.5C°
(
-5F°
–
5F
°)
0
(C)
0
(F)
To scroll through the system setup start screens, tap the
DOWN
or
UP
keys.To go to the
Evaporator Fan Type
selection screen,
press
SET.
No selection
Select the evaporator fan type: single speed fan or two-speed
fan. To save the selection, press
SET
to save selection.
1-SPD
or
2-SPD
1-SPD
To scroll through the system setup start screens, tap the
DOWN
or
UP
keys
.
To go to the Defrost Type selection screen, press
SET.
Select the defrost type: resistive electric heat, passive off-cycle,
or hot gas bypass. To save the selection, press
SET.
ELE/TRC, OFF/
CYC,
or
HOT/
GAS
OFF/CYC
To scroll through the system setup start screens, tap the
DOWN
or
UP
keys. To go to the
DEFROST TERM TYPE
screen, press
SET.
Note:
The
DEFROST TERM TYPE
screen does not display
when the
DEFROST TYPE
is
OFF/CYC
, because off-
cycle defrost termination is time-based.
Select the defrost termination type: high-voltage binary input
temperature switch, Sn2 temperature sensor, or time-based. To
save the selection, press
SET.
Note:
The
DEFROST TERM TYPE
screen does not display
when the
DEFROST TYPE
is
OFF/CYC
, because off-
cycle defrost termination is time-based.
HV/BIN, TE/MP,
or
TI/ME
TI/ME
Table 8: A52x Controller Set Up Screens, Descriptions, Behaviors, Value Ranges a Selection Lists (Part 6
of 19)
Screen Name in
Message Field
Parameter Description, Behavior, User Action
Value Range or
Selection List
Default
Value or
Selection
SENSOR 2: TYPE
A99
SN2: OFFSET
SET
SN2: OFFSET
0
o
EVAP FAN TYPE
SET
EVAP FAN TYPE
1
SPD
DEFROST TYPE
SET
DEFROST TYPE
OFF
CYC
DEFROST TERM
TYPE
SET
DEFROST TERM
TYPE
TI
ME
