User manual - H424W1

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
		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	/
		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	/
	v__			Functions about electronic expansion valve
		vP_		Functions about electronic expansion valve preference
4			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	/
5			vPd	network originating address of the pressure broadcast	0	255	0	/
		vt_		Functions about electronic expansion valve temperature
6			vtt	wanted overheating (similar to Danfoss thermostatic overheating spring regulation)	-999.0	999.0	8.0	K
7			vtH	maximum overheating	-999.0	999.0	99.0	K
8			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
9			vd1	on-off duty cycle duration	0	194 4:20:15	8	dd hh:mm:ss
10			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
11			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	suction temperature	-9.0	9.0	0.0	K
			b2A	enable probe	oFF	_on	_on	/
	L__			Functions about alarm and stand-by
		Lt_		Temperature alarm
12			LtL	low temperature alarm set point	-55.0	145.0	-2.0	°C
13			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_		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	3	3	/
	I__			Functions about input-output and machine state (read only)
		IA_		Analog inputs
			IA1	room temperature	-55.0	145.0	-55.0	°C
			IA2	suction temperature	-55.0	145.0	-55.0	°C
		Id_		Digital input
			Id4	digital input 4 (door closure / remote defrost) - read by IA4	oFF	_on	oFF	/
		OS_		Machine status
			LLA	actual alarm - read only (0 means no alarm)	0	255	0	/
		Od_		Digital output
14			Od1	solenoid	oFF	_on	oFF	/
14			Od4	evaporator	oFF	_on	oFF	/
	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
		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	/
		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	/
	v__			Functions about electronic expansion valve
		vP_		Functions about electronic expansion valve preference
4			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	/
5			vPd	network originating address of the pressure broadcast	0	255	0	/
		vt_		Functions about electronic expansion valve temperature
6			vtt	wanted overheating (similar to Danfoss thermostatic overheating spring regulation)	-999.0	999.0	8.0	K
7			vtH	maximum overheating	-999.0	999.0	99.0	K
8			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
9			vd1	on-off duty cycle duration	0	194 4:20:15	8	dd hh:mm:ss
10			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
11			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	suction temperature	-9.0	9.0	0.0	K
			b2A	enable probe	oFF	_on	_on	/
	L__			Functions about alarm and stand-by
		Lt_		Temperature alarm
12			LtL	low temperature alarm set point	-55.0	145.0	-2.0	°C
13			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_		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	suction temperature	-55.0	145.0	-55.0	°C
		Id_		Digital input
			Id4	digital input 4 (door closure / remote defrost) - read by IA4	oFF	_on	oFF	/
		OS_		Machine status
			LLA	actual alarm - read only (0 means no alarm)	0	255	0	/
		Od_		Digital output
14			Od1	solenoid	oFF	_on	oFF	/
14			Od4	evaporator	oFF	_on	oFF	/
	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	15:00	dd hh:mm:ss
1			FdP	period of air renew cycle	0	194 4:20:15	4:00:00	dd hh:mm:ss
		FF_		Functions about forced defrost
			FFh	enable forced air renew 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	/
		Ft_		Functions about defrost temperature
			Ftt	defrost stop temperature	4.0	146.0	6.0	°C
	n__			Functions about fans
		nE_		Functions about evaporator fans
			nEH	force evaporator fans when refrigeration is off	oFF	_on	oFF	/
	v__			Functions about electronic expansion valve
		vP_		Functions about electronic expansion valve preference
4			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	1	0	/
5			vPd	network originating address of the pressure broadcast	0	255	0	/
		vt_		Functions about electronic expansion valve temperature
6			vtt	wanted overheating (similar to Danfoss thermostatic overheating spring regulation)	2.0	40.0	8.0	K
7			vtH	maximum overheating	6.0	55.0	99.0	K
8			vtL	minimum overheating	0.0	10.0	6.0	K
			vtU	maximum pressure allowed in the suction line (similar to Danfoss MOP)	0.0	30.0	10.0	(gauge) bar
		vd_		Functions about electronic expansion valve timing
9			vd1	on-off duty cycle duration	0	194 4:20:15	8	dd hh:mm:ss
10			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
11			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	-9.0	9.0	0.0	K
			b1A	enable probe	oFF	_on	_on	/
		b2_		Probe nr. 2
			b2C	suction temperature	-9.0	9.0	0.0	K
			b2A	enable probe	oFF	_on	_on	/
	L__			Functions about alarm and stand-by
		Lt_		Temperature alarm
12			LtL	low temperature alarm set point	-55.0	145.0	-2.0	°C
13			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_		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	suction temperature	-55.0	145.0	-55.0	°C
		Id_		Digital input
			Id4	digital input 4 (door closure / remote defrost) - read by IA4	oFF	_on	oFF	/
		OS_		Machine status
			LLA	actual alarm - read only (0 means no alarm)	0	255	0	/
		Od_		Digital output
14			Od1	solenoid	oFF	_on	oFF	/
14			Od4	evaporator	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	When off, the refrigeration solenoid is steadily on during cooling.
5	The address of the central unit who is broadcasting pressure (usually 1). Use 0 for previous application H425V1 with no origin specification.
6	Caution! Low overheating causes liquid return and compressor damage.
7	Overheating over the maximum forces valve anticipated opening.
8	Overheating under the minimum delays valve opening.
9	Caution! Short duty cycle reduces valve life.
10	Caution! Low overheating causes liquid return and compressor damage.
11	Caution! High adaptation speed causes swing in the suction line and damage to the compressor.
12	The low temperature differential is fixed, and alarm status stops at 0.2 °C above the set point.
13	The high temperature differential is fixed, and alarm status stops at 0.2 °C under the set point.
14	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.

Slave alarm list

Display	Alarm
/	none	This instrument has no slave alarm.

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	unused	Unused in this application.
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.