User manual - H424V3

Parameter list
Parameter remarks
Alarm list
Slave alarm list
Button list
Led list
Soft command list
How to ...
Shortcut list
Led and push button location

Parameter list

Rem.	Parameter			Description	Minimum	Maximum	Default	Unit
	S__			Functions about storage
		St_		Functions about storage temperature
			_t0	storage room temperature	-55.0	145.0	2.0	°C
			_td	differential	0.0	50.0	0.2	K
		Fd_		Functions about defrost duration and timing
			Fd0	immediate delay before next defrost	0	194 4:20:15	0	dd hh:mm:ss
			Fdd	on-time duration of the defrost	0	194 4:20:15	30:00	dd hh:mm:ss
			Fdg	dripping time after defrost	0	194 4:20:15	2:00	dd hh:mm:ss
			FdE	evaporator fan activation delay after the defrost	0	194 4:20:15	7:00	dd hh:mm:ss
1			FdP	overall period of the defrost	0	194 4:20:15	4:00:00	dd hh:mm:ss
			FdY	temperature display timeout after end of defrost - resets IA1=OS4=OS5	0	194 4:20:15	20:00	dd hh:mm:ss
		FF_		Functions about forced defrost
			FFh	enable forced defrost by keyboard short cut	oFF	_on	_on	/
			FFd	forced defrost duration	0	194 4:20:15	30:00	dd hh:mm:ss
2			FFo	start immediate forced defrost	oFF	_on	oFF	/
		FP_		Functions about defrost preference
			FPt	defrost type: 0=none / 1=pause / 2=air / 3=electric / 4=hot gas / 5=heat pump / 6=heat pump by hp	0	4	2	/
3			FPc	use door closure input as start command for remote defrost	oFF	_on	oFF	/
			FPM	this side is defrost master (the instrument is divided in two sides)	oFF	_on	oFF	/
			FPS	this side is defrost slave	oFF	_on	oFF	/
			FPX	this side is defrost slave from aux master (0 means from main master - 255 whatever)	0	255	0	/
			FPY	this side is defrost slave from side nr. (255 means whatever)	1	255	1	/
		Ft_		Functions about defrost temperature
			Ftt	defrost stop temperature	-55.0	145.0	6.0	°C
	n__			Functions about fans
		nE_		Functions about evaporator fans
			nEH	force evaporator fans when refrigeration is off	oFF	_on	oFF	/
			nEF	enable evaporator fans during defrost	oFF	_on	oFF	/
			nEg	enable evaporator fans during dripping	oFF	_on	oFF	/
	c__			Functions about door and light
		cP_		Door switch and evaporator fan
			cPH	stop evaporator fans when door is open	oFF	_on	_on	/
			cPF	pause defrost timer when air defrost is suspended by evaporator fan stop	oFF	_on	_on	/
			cPd	delay of fan automatic switch on	0	194 4:20:15	30:00	dd hh:mm:ss
		cI_		Functions about light
			cIH	switch on the light when the door is open and off when closed	oFF	_on	_on	/
4			cIo	switch off the light automatically if it has been switched on from outside	oFF	_on	_on	/
			cId	delay of light automatic switch off	0	194 4:20:15	30	dd hh:mm:ss
	v__			Functions about electronic expansion valve
		vP_		Functions about electronic expansion valve preference
5			vPH	enable electronic expansion valve	oFF	_on	_on	/
			vPP	refrigerant gas type: 0=R134A / 1=R404A / 2=R507A / 3=R22 / 4=R407C / 5=R407F / 6=R407A / 7=R410A / 8=R290 / 9=R1270 / 10=R744 / 11=R717 / 12=R1234y / 13=R1234z / 14=R449A / 15=R448A / 16=R452A / 17=R450A / 18=R513A / 19=R407H / 20=R23 / 21=R455A	0	4	0	/
6			vPd	network originating address of the pressure broadcast	0	255	0	/
		vt_		Functions about electronic expansion valve temperature
7			vtt	wanted overheating (similar to Danfoss thermostatic overheating spring regulation)	-999.0	999.0	8.0	K
8			vtH	maximum overheating	-999.0	999.0	99.0	K
9			vtL	minimum overheating	-999.0	999.0	6.0	K
			vtU	maximum pressure allowed in the suction line (similar to Danfoss MOP)	0.0	999.0	10.0	(gauge) bar
		vd_		Functions about electronic expansion valve timing
10			vd1	on-off duty cycle duration	0	194 4:20:15	8	dd hh:mm:ss
11			vd2	on duty cycle duration at refrigeration start (set to 0 for previous stop value)	0	194 4:20:15	5	dd hh:mm:ss
12			vdd	on duty cycle adaptation speed (low value for slow adaptation and small swinging)	0	255	8	/
	b__			Functions about probe calibration
		b1_		Probe nr. 1
			b1C	room temperature	-999.0	999.0	0.0	K
			b1A	enable probe	oFF	_on	_on	/
		b2_		Probe nr. 2
			b2C	defrost temperature	-999.0	999.0	0.0	K
			b2A	enable probe	oFF	_on	_on	/
		b3_		Probe nr. 3
			b3C	suction temperature	-999.0	999.0	0.0	K
			b3A	enable probe	oFF	_on	_on	/
		b4_		Probe nr. 4
			b4C	unused temperature - eventually used by Id4	-999.0	999.0	0.0	K
			b4A	enable probe	oFF	_on	_on	/
	L__			Functions about alarm and stand-by
		Lt_		Temperature alarm
13			LtL	low temperature alarm set point	-55.0	145.0	-2.0	°C
14			LtH	high temperature alarm set point	-55.0	145.0	14.0	°C
			Ltd	alarm delay	0	194 4:20:15	30:00	dd hh:mm:ss
		LO_		Door alarm
			LOH	enable door alarm	oFF	_on	_on	/
			LOd	door alarm delay	0	194 4:20:15	30:00	dd hh:mm:ss
			LOt	temperature alarm minimum delay after door opening	0	194 4:20:15	15:00	dd hh:mm:ss
		Lo_		On / stand-by status
			Loo	actual status: stand-by or on	oFF	_on	oFF	/
	P__			Functions about master preferences
		Pd_		Functions about network address
			PdM	master address for global network communication	0	254	1	/
			PdS	number of slaves connected to this master	1	2	2	/
			PdX	number of aux masters connected to this master - 0 means no aux connected	0	31	0	/
			PdY	this master is the auxiliary nr. - 0 means it is not aux	0	31	0	/
	I__			Functions about input-output and machine state (read only)
		IA_		Analog inputs
			IA1	room temperature	-55.0	145.0	-55.0	°C
			IA2	defrost temperature	-55.0	145.0	-55.0	°C
			IA3	suction temperature	-55.0	145.0	-55.0	°C
			IA4	unused temperature - eventually used by Id4	-55.0	145.0	-55.0	°C
		Id_		Digital input
			Id2	evaporator hardware safety	oFF	_on	oFF	/
			Id3	defrost hardware safety	oFF	_on	oFF	/
			Id4	digital input 4 (door closure / remote defrost) - read by IA4	oFF	_on	oFF	/
			Id5	phase software safety	oFF	_on	oFF	/
		OS_		Machine status
			OS1	low pressure (LP)	0.0	999.0	0.0	(gauge) bar
			OS2	refrigerant saturation temperature corresponding to the low pressure	-55.0	145.0	-55.0	°C
			OS3	refrigerant overheating at the evaporator outlet	-999.0	999.0	-999.0	K
			OS4	temperature before defrost - reads IA1 at range reentering after defrost	-55.0	145.0	-55.0	°C
			OS5	set point temperature during defrost - reads IA1 at range reentering after defrost	-55.0	145.0	-55.0	°C
			OSn	evaporator fan stopped by door opening or manual control	oFF	_on	oFF	/
			OSS	defrost status: 1=normal / 2=defr / 3=drip / 4=fan delay / 5=forced / 6=wait	0	6	0	/
			OSF	defrost timer (in countdown-mode)	0	194 4:20:15	0	dd hh:mm:ss
			OSb	special defrost display in progress - affects OS4 and OS5 (see FdY)	oFF	_on	oFF	/
			OSY	timer of the temperature display timeout, after the end of defrost (see FdY)	0	194 4:20:15	0	dd hh:mm:ss
			OSX	communication alarm: 0=normal / 87=out of range / 88=no link / 89=lost link	0	255	0	/
			LLA	actual alarm - read only (0 means no alarm)	0	255	0	/
		Od_		Digital output
15			Od1	solenoid	oFF	_on	oFF	/
15			Od3	light	oFF	_on	oFF	/
15			Od5	evaporator	oFF	_on	oFF	/
15			Od6	defrost	oFF	_on	oFF	/
	E__			Functions about slave preferences
		Ed_		Functions about network address
			EdS	slave address for local network communication	1	254	1	/
			EdX	auxiliary master served by this slave - 0 means it is not aux	0	255	0	/
		EY_		Functions about display
			EYY	input to show on display: 1=IA1 / 2=IA2 ... / 5=OS1 / 6=OS2 ...	1	9	1	/
			EYr	enable display rotation: 0=off / 1=all / 2=selected	0	2	0	/
			EYF	display special text during defrost	0	1	0	/
			EYt	label of special text during defrost	000	yyy	dEF	/
		E0_		Functions about display rotation, when EYr=1
			E0d	duration of label display during rotation	0	255	1	/
			E0E	duration of value display during rotation	0	255	2	/
		E1_		Functions about display rotation, when EYr=2 (repeated for each parameter)
			E1d	duration of label display during rotation	0	255	0	/
			E1t	label text during rotation	000	yyy	rM=	/
			E1E	duration of value display during rotation	0	255	6	/
		E2_		Functions about display rotation, when EYr=2 (repeated for each parameter)
			E2d	duration of label display during rotation	0	255	1	/
			E2t	label text during rotation	000	yyy	dE=	/
			E2E	duration of value display during rotation	0	255	0	/
		E3_		Functions about display rotation, when EYr=2 (repeated for each parameter)
			E3d	duration of label display during rotation	0	255	1	/
			E3t	label text during rotation	000	yyy	SU=	/
			E3E	duration of value display during rotation	0	255	0	/
		E4_		Functions about display rotation, when EYr=2 (repeated for each parameter)
			E4d	duration of label display during rotation	0	255	1	/
			E4t	label text during rotation	000	yyy	do=	/
			E4E	duration of value display during rotation	0	255	0	/
		E5_		Functions about display rotation, when EYr=2 (repeated for each parameter)
			E5d	duration of label display during rotation	0	255	1	/
			E5t	label text during rotation	000	yyy	LP=	/
			E5E	duration of value display during rotation	0	255	4	/
		E6_		Functions about display rotation, when EYr=2 (repeated for each parameter)
			E6d	duration of label display during rotation	0	255	1	/
			E6t	label text during rotation	000	yyy	Lt=	/
			E6E	duration of value display during rotation	0	255	0	/
		E7_		Functions about display rotation, when EYr=2 (repeated for each parameter)
			E7d	duration of label display during rotation	0	255	1	/
			E7t	label text during rotation	000	yyy	oh=	/
			E7E	duration of value display during rotation	0	255	0	/
		E8_		Functions about display rotation, when EYr=2 (repeated for each parameter)
			E8d	duration of label display during rotation	0	255	1	/
			E8t	label text during rotation	000	yyy	bF=	/
			E8E	duration of value display during rotation	0	255	0	/
		E9_		Functions about display rotation, when EYr=2 (repeated for each parameter)
			E9d	duration of label display during rotation	0	255	1	/
			E9t	label text during rotation	000	yyy	SF=	/
			E9E	duration of value display during rotation	0	255	0	/
		Eb_		Functions about buzzer
			EbH	enable buzzer	0	1	1	/
	S__			Functions about storage
		St_		Functions about storage temperature
			_t0	storage room temperature	-55.0	145.0	2.0	°C
			_td	differential	0.0	50.0	0.2	K
		Fd_		Functions about defrost duration and timing
			Fd0	immediate delay before next defrost	0	194 4:20:15	0	dd hh:mm:ss
			Fdd	on-time duration of the defrost	0	194 4:20:15	30:00	dd hh:mm:ss
			Fdg	dripping time after defrost	0	194 4:20:15	2:00	dd hh:mm:ss
			FdE	evaporator fan activation delay after the defrost	0	194 4:20:15	7:00	dd hh:mm:ss
1			FdP	overall period of the defrost	0	194 4:20:15	4:00:00	dd hh:mm:ss
			FdY	temperature display timeout after end of defrost - resets IA1=OS4=OS5	0	194 4:20:15	20:00	dd hh:mm:ss
		FF_		Functions about forced defrost
			FFh	enable forced defrost by keyboard short cut	oFF	_on	_on	/
			FFd	forced defrost duration	0	194 4:20:15	30:00	dd hh:mm:ss
2			FFo	start immediate forced defrost	oFF	_on	oFF	/
		FP_		Functions about defrost preference
			FPt	defrost type: 0=none / 1=pause / 2=air / 3=electric / 4=hot gas / 5=heat pump / 6=heat pump by hp	0	4	2	/
3			FPc	use door closure input as start command for remote defrost	oFF	_on	oFF	/
			FPM	this side is defrost master (the instrument is divided in two sides)	oFF	_on	oFF	/
			FPS	this side is defrost slave	oFF	_on	oFF	/
			FPX	this side is defrost slave from aux master (0 means from main master - 255 whatever)	0	255	0	/
			FPY	this side is defrost slave from side nr. (255 means whatever)	1	255	1	/
		Ft_		Functions about defrost temperature
			Ftt	defrost stop temperature	-55.0	145.0	6.0	°C
	n__			Functions about fans
		nE_		Functions about evaporator fans
			nEH	force evaporator fans when refrigeration is off	oFF	_on	oFF	/
			nEF	enable evaporator fans during defrost	oFF	_on	oFF	/
			nEg	enable evaporator fans during dripping	oFF	_on	oFF	/
	c__			Functions about door and light
		cP_		Door switch and evaporator fan
			cPH	stop evaporator fans when door is open	oFF	_on	_on	/
			cPF	pause defrost timer when air defrost is suspended by evaporator fan stop	oFF	_on	_on	/
			cPd	delay of fan automatic switch on	0	194 4:20:15	30:00	dd hh:mm:ss
		cI_		Functions about light
			cIH	switch on the light when the door is open and off when closed	oFF	_on	_on	/
4			cIo	switch off the light automatically if it has been switched on from outside	oFF	_on	_on	/
			cId	delay of light automatic switch off	0	194 4:20:15	30	dd hh:mm:ss
	v__			Functions about electronic expansion valve
		vP_		Functions about electronic expansion valve preference
5			vPH	enable electronic expansion valve	oFF	_on	_on	/
			vPP	refrigerant gas type: 0=R134A / 1=R404A / 2=R507A / 3=R22 / 4=R407C / 5=R407F / 6=R407A / 7=R410A / 8=R290 / 9=R1270 / 10=R744 / 11=R717 / 12=R1234y / 13=R1234z / 14=R449A / 15=R448A / 16=R452A / 17=R450A / 18=R513A / 19=R407H / 20=R23 / 21=R455A	0	4	0	/
6			vPd	network originating address of the pressure broadcast	0	255	0	/
		vt_		Functions about electronic expansion valve temperature
7			vtt	wanted overheating (similar to Danfoss thermostatic overheating spring regulation)	-999.0	999.0	8.0	K
8			vtH	maximum overheating	-999.0	999.0	99.0	K
9			vtL	minimum overheating	-999.0	999.0	6.0	K
			vtU	maximum pressure allowed in the suction line (similar to Danfoss MOP)	0.0	999.0	10.0	(gauge) bar
		vd_		Functions about electronic expansion valve timing
10			vd1	on-off duty cycle duration	0	194 4:20:15	8	dd hh:mm:ss
11			vd2	on duty cycle duration at refrigeration start (set to 0 for previous stop value)	0	194 4:20:15	5	dd hh:mm:ss
12			vdd	on duty cycle adaptation speed (low value for slow adaptation and small swinging)	0	255	8	/
	b__			Functions about probe calibration
		b1_		Probe nr. 1
			b1C	room temperature	-999.0	999.0	0.0	K
			b1A	enable probe	oFF	_on	_on	/
		b2_		Probe nr. 2
			b2C	defrost temperature	-999.0	999.0	0.0	K
			b2A	enable probe	oFF	_on	_on	/
		b3_		Probe nr. 3
			b3C	suction temperature	-999.0	999.0	0.0	K
			b3A	enable probe	oFF	_on	_on	/
		b4_		Probe nr. 4
			b4C	unused temperature - eventually used by Id4	-999.0	999.0	0.0	K
			b4A	enable probe	oFF	_on	_on	/
	L__			Functions about alarm and stand-by
		Lt_		Temperature alarm
13			LtL	low temperature alarm set point	-55.0	145.0	-2.0	°C
14			LtH	high temperature alarm set point	-55.0	145.0	14.0	°C
			Ltd	alarm delay	0	194 4:20:15	30:00	dd hh:mm:ss
		LO_		Door alarm
			LOH	enable door alarm	oFF	_on	_on	/
			LOd	door alarm delay	0	194 4:20:15	30:00	dd hh:mm:ss
			LOt	temperature alarm minimum delay after door opening	0	194 4:20:15	15:00	dd hh:mm:ss
		Lo_		On / stand-by status
			Loo	actual status: stand-by or on	oFF	_on	oFF	/
	I__			Functions about input-output and machine state (read only)
		IA_		Analog inputs
			IA1	room temperature	-55.0	145.0	-55.0	°C
			IA2	defrost temperature	-55.0	145.0	-55.0	°C
			IA3	suction temperature	-55.0	145.0	-55.0	°C
			IA4	unused temperature - eventually used by Id4	-55.0	145.0	-55.0	°C
		Id_		Digital input
			Id2	evaporator hardware safety	oFF	_on	oFF	/
			Id3	defrost hardware safety	oFF	_on	oFF	/
			Id4	digital input 4 (door closure / remote defrost) - read by IA4	oFF	_on	oFF	/
			Id5	phase software safety	oFF	_on	oFF	/
		OS_		Machine status
			OS1	low pressure (LP)	0.0	999.0	0.0	(gauge) bar
			OS2	refrigerant saturation temperature corresponding to the low pressure	-55.0	145.0	-55.0	°C
			OS3	refrigerant overheating at the evaporator outlet	-999.0	999.0	-999.0	K
			OS4	temperature before defrost - reads IA1 at range reentering after defrost	-55.0	145.0	-55.0	°C
			OS5	set point temperature during defrost - reads IA1 at range reentering after defrost	-55.0	145.0	-55.0	°C
			OSn	evaporator fan stopped by door opening or manual control	oFF	_on	oFF	/
			OSS	defrost status: 1=normal / 2=defr / 3=drip / 4=fan delay / 5=forced / 6=wait	0	255	0	/
			OSF	defrost timer (in countdown-mode)	0	194 4:20:15	0	dd hh:mm:ss
			OSb	special defrost display in progress - affects OS4 and OS5 (see FdY)	oFF	_on	oFF	/
			OSY	timer of the temperature display timeout, after the end of defrost (see FdY)	0	194 4:20:15	0	dd hh:mm:ss
			OSX	communication alarm: 0=normal / 87=out of range / 88=no link / 89=lost link	0	255	0	/
			LLA	actual alarm - read only (0 means no alarm)	0	255	0	/
		Od_		Digital output
15			Od1	solenoid	oFF	_on	oFF	/
15			Od3	light	oFF	_on	oFF	/
15			Od5	evaporator	oFF	_on	oFF	/
15			Od6	defrost	oFF	_on	oFF	/

Parameter remarks

Nr.	Remark
1	The period of each cycle includes on-time + off-time, that is the overall duration of the cycle.
2	Following defrost cycles will be aligned to the end of forced one.
3	For defrost synchronization of refrigerated expositors.
4	No action if the light is switched on from inside the room.
5	When off, the refrigeration solenoid is steadily on during cooling.
6	The address of the central unit who is broadcasting pressure (usually 1). Use 0 for previous application H425V1 with no origin specification.
7	Caution! Low overheating causes liquid return and compressor damage.
8	Overheating over the maximum forces valve anticipated opening.
9	Overheating under the minimum delays valve opening.
10	Caution! Short duty cycle reduces valve life.
11	Caution! Low overheating causes liquid return and compressor damage.
12	Caution! High adaptation speed causes swing in the suction line and damage to the compressor.
13	The low temperature differential is fixed, and alarm status stops at 0.2 °C above the set point.
14	The high temperature differential is fixed, and alarm status stops at 0.2 °C under the set point.
15	The minus sign on display ("-") signals that output is going to start after a delay.

Alarm list

Display	Alarm
A01	low temperature	Low temperature limit has been reached.
A02	high temperature	High temperature limit has been reached.
A03	door open	Time limit for door opening has been reached.
A04	RTC memory loss	Memory loss of real time clock [RTC] - timer reset.
A05	Side 1 lost defrost	Side 1 of the instrument is defrost slave and does not receive any message from the defrost master.
A06	Side 2 lost defrost	Side 2 of the instrument is defrost slave and does not receive any message from the defrost master.
A07	Bad defr. par. side 1	Bad defrost parameters for side 1 of the instrument, please ensure: Fdd+Fdg+FdE<FdP, 5 sec<FdP, not concurrent FPS and FPM, nor FPS and FPc, nor PdX and PdY. Put FPt=0 to avoid this check.
A08	Bad defr. par. side 2	Bad defrost parameters for side 2 of the instrument, please ensure: Fdd+Fdg+FdE<FdP, 5 sec<FdP, not concurrent FPS and FPM, nor FPS and FPc, nor PdX and PdY. Put FPt=0 to avoid this check.

Slave alarm list

Display	Alarm
A96	slave EEPROM	Failed write operation onto the slave EEPROM.
A97	out of range	The slave address EdS might be out of the master range, the latter going from 1 to PdS.
A98	no link	The slave does not receive any message from the master.
A99	lost link	The slave lost the communication with the master.

Button list

Push button		Function
B1	esc - silence	Exit without saving from any menu - alarm buzzer silence.
B2	up	Up navigation in the menu.
B3	on/stand-by - pause	Toggle between on and stand-by - toggle evaporator fan stop.
B4	left - light	Left navigation in the menu - switch the light on and off.
B5	down - defrost	Down navigation in the menu - force immediate defrost.
B6	right - menu - set	Right navigation in the menu - display and modify the set point - enter menu.

Led list

Led		Function
L1	cooling	On during cooling.
L2	evaporator	On during evaporator run - blinking slowly during activation delay.
L3	defrost	On during defrost - blinking slowly during dripping.
L4	unused	Unused in this application.
L5	unused	Unused in this application.
L6	unused	Unused in this application.
L7	light	On when lighting is on - blinking slowly during deactivation delay.

Soft command list

Soft command		Function

How to ...

How to ...	Function
Switch between on and stand-by.	Keep pressed B3 button, to activate and deactivate stand-by. In stand-by every output is disabled except light, leds from L1 to L6 blink, timers continue to count.
Stop or restart evaporator fans.	Press shortly the B3 button. When the evaporator fans are stopped, the display blinks.
Program the menu.	Keep pressed B6 to enter the menu. Navigate up and down with B2 and B5. Select the submenu by B6. Change the parameter by B2 and B5, press B6 to confirm, or B4 to go back without saving. The changes will have effect after the exit from programming pressing B4 repeatedly. Press B1 to exit immediately without saving any parameter.
Show or change temperature set.	Press shortly B6 - the display shows the current set point - change it by B2 and B5, and confirm it by B6. As alternative, enter the menu program as explained above, modify the parameter _t0, then confirm it.
Force a defrost.	Keep pressed B5.

Shortcut list

Buttons to press	Shortcut description - keep pressed 5 seconds
B5	Force an immediate defrost.

Led and push button location

Led and push button legend.