Heatcraft Refrigeration Products Refrigeration System H-IM-82B Installation And Operation Manual page 10

DISPLAY
Temperature
CF
measurement unit
DEFROST
tdF Defrost type
Defrost termination
dtE
temperature
Interval between
IdF
defrost cycles
(Maximum) length
MdF
for defrost
Fdt Drip time
FANS (XR60CX ONLY)
Fans delay after
Fnd
defrost
Temperature
differential
Fct
avoiding short
cycles of fans
Fans stop
FSt
temperature
ALARMS
Temperature alarms
ALC
configuration
MAXIMUM
ALU
temperature alarm
Minimum
ALL
temperature alarm
ALARM SIGNALS
Message Cause
Room probe
"P1"
failure
Evaporator probe
"P2"
failure
Maximum
"HA"
temperature alarm
10
°C=Celsius; °F=Fahrenheit. WARNING: When
the measurement unit is changed the SET
point and the values of the parameters Hy,
LS, US, Ot, ALU and ALL have to be checked
and modified if necessary
EL = electrical heater; in = hot gas
(-50÷50 °C/ -58÷122°F) (Enabled only when
EdF=Pb) sets the temperature measured by
the evaporator probe, which causes the end
of defrost
(0÷120h) Determines the time interval
between the beginning of two defrost cycles
(0÷255min) When P2P = n, (not evaporator
probe: timed defrost) it sets the defrost
duration, when P2P = y (defrost end based
on temperature) it sets the maximum
length for defrost
(0÷120 min) time interval between reaching
defrost termination temperature and the
restoring of the control's normal operation.
This time allows the evaporator to eliminate
water drops that might have formed due
to defrost
(0÷255min) Interval between end of defrost
and evaporator fans start
(0÷59°C; Fct=0 function disabled). If the
difference of temperature between the
evaporator and the room probes is more
than the value of the Fct parameter, the
fans are switched on
(-50÷50°C/122°F) setting of temperature,
detected by evaporator probe, above
which fans are always OFF
(Ab; rE) Ab= absolute temperature: alarm
temperature is given by the ALL or ALU
values. rE = temperature alarms are
referred to the set point. Temperature alarm
is enabled when the temperature exceeds
the "SET+ALU" or "SET-ALL" values
(SET÷110°C; SET÷230°F) when this
temperature is reached the alarm is
enabled, after the "ALd" delay time
-50.0 ÷ SET°C; -58÷230°F when this
temperature is reached the alarm is
enabled, after the "ALd" delay time
Outputs
Compressor output
according to par. "Con" and
"COF"
Defrost end is timed
Outputs unchanged.
°C = Celsius
Pr2
°F
=Fahrenheit
EL = electric
defrost / in
Pr2
= hot gas
defrost
Pr1 -58~122
0 ~ 120
Pr1
hours
0 ~ 255
Pr2
minutes
0 ~ 255
Pr1
minutes
0 ~ 255
Pr1
minutes
Pr2 0~90
Pr1 -58~122
rE = relative
to set point
Pr2
Ab =
absolute
Pr2 ALL~ 302
Pr2 -58~ ALu
Message Cause
Minimum
"LA"
temperature alarm
"dA" Door open
"EA" External alarm
°F °F °F
EL EL EL
65 65 38
6 6 6
40 40 60
2 2 0
Not
2 2
Applicable
Not
10 10
Applicable
Not
35 35
Applicable
Ab Ab Ab
38 50 50
-25 15 30
Outputs
Outputs unchanged.
Compressor and fans
restarts
Output unchanged.
Reprinted with permission from Dixell.