Heatcraft Refrigeration Products H-IM-82B Alarm Signals, Message Cause Outputs

2.Freezers

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

ALARM SIGNALS

Message	Cause	Outputs
	Room probe	Compressor output
“P1”		according to par. “Con” and
	failure
		“COF”
“P2”	Evaporator probe	Defrost end is timed
	failure
“HA”	Maximum	Outputs unchanged.
	temperature alarm

Message	Cause	Outputs
“LA”	Minimum	Outputs unchanged.
	temperature alarm
“dA”	Door open	Compressor and fans
		restarts
“EA”	External alarm	Output unchanged.

Reprinted with permission from Dixell.

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