User manual - H425V3

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
	M__			Functions about compressor
		MU_		Functions about pressure switches
			ML0	suction low pressure regulation (similar to Danfoss RT1AL set point minus half of neutral zone)	0.0	99.0	2.8	(gauge) bar
			MLb	suction pressure regulation dead band (ML0 +/- MLb are the upper/lower limits)	0.0	99.0	0.5	bar
			MLd	suction pressure regulation differential (loading at ML0+MLb+MLd / unl at ML0-MLb-MLd)	0.0	99.0	0.2	bar
1			Md0	minimum HP-LP-difference to unload last compressor still running	0.0	99.0	2.0	bar
1			Md1	minimum HP-LP-difference to leave all the compressors off	0.0	99.0	0.5	bar
			MH0	discharge (HP) pressure limit forcing the timed compressor unload	0.0	99.0	24.0	(gauge) bar
2			MLH	low pressure safety restart ( similar to Danfoss KP15 lp set point )	0.0	99.0	1.2	(gauge) bar
			MLL	low pressure safety stop ( similar to Danfoss KP15 lp set point - differential )	0.0	99.0	0.2	(gauge) bar
			MHH	high pressure safety stop ( similar to Danfoss KP15 hp set point )	0.0	99.0	28.0	(gauge) bar
			MHL	high pressure safety restart ( similar to Danfoss KP15 hp set point - differential )	0.0	99.0	24.0	(gauge) bar
3			MU1	minimum oil differential pressure of compressor nr. 1	0.0	99.0	1.0	bar
			MU2	minimum oil differential pressure of compressor nr. 2	0.0	99.0	1.0	bar
4			MU3	minimum oil differential pressure of compressor nr. 3	0.0	99.0	1.0	bar
			Mut	minimum oil receiver temperature before opening the oil solenoid	-55.0	145.0	25.0	°C
5			MM1	usage of mc nr. 1 output: 0=off / 1=on / 2=auto / 3=slave no / 4=slave nc / 5=kriwan	0	5	2	/
			MM2	usage of mc nr. 2 output: 0=off / 1=on / 2=auto / 3=slave no / 4=slave nc / 5=kriwan	0	5	2	/
			MM3	usage of mc nr. 3 output: 0=off / 1=on / 2=auto / 3=slave no / 4=slave nc / 5=kriwan	0	5	2	/
6			MMH	enable external load override on INP-4	oFF	_on	oFF	/
7			MMd	external load override delay	0	194 4:20:15	1:00:00	dd hh:mm:ss
	n__			Functions about fans
		nc_		Functions about condenser fans
			ncH	enable condenser fans when compressor is off and discharge pressure is over maximum	oFF	_on	_on	/
8			ncr	enable condenser fans speed regulation	oFF	_on	_on	/
9			ncU	fan minimum speed	0	255	40	/
			ncd	minimum HP-LP-difference to keep on fans	0.0	99.0	2.0	(gauge) bar
			n1H	fan 1 start pressure ( similar to Danfoss KP5 set point ) - active just when ncr is oFF	0.0	99.0	6.0	(gauge) bar
			n1L	fan 1 stop pressure ( similar to Danfoss KP5 set point - differential )	0.0	99.0	2.0	(gauge) bar
			n2H	fan 2 start pressure	0.0	99.0	7.0	(gauge) bar
			n2L	fan 2 stop pressure	0.0	99.0	5.0	(gauge) bar
			n3H	fan 3 start pressure	0.0	99.0	8.0	(gauge) bar
			n3L	fan 3 stop pressure	0.0	99.0	6.0	(gauge) bar
			n4H	fan 4 start pressure	0.0	99.0	9.0	(gauge) bar
			n4L	fan 4 stop pressure	0.0	99.0	7.0	(gauge) bar
	b__			Functions about probe calibration
		b1_		Probe nr. 1
			b1C	oil receiver temperature	-99.0	99.0	0.0	K
			b1A	enable probe	oFF	_on	_on	/
		b2_		Probe nr. 2
			b2C	discharge temperature	-99.0	99.0	0.0	K
			b2A	enable probe	oFF	_on	_on	/
		b3_		Probe nr. 3
			b3C	suction temperature	-99.0	99.0	0.0	K
			b3A	enable probe	oFF	_on	_on	/
		b4_		Probe nr. 4
			b4C	mc1 oil pressure	-99.0	99.0	0.0	bar
			b4A	enable probe	oFF	_on	_on	/
		b5_		Probe nr. 5
			b5C	mc2 oil pressure	-99.0	99.0	0.0	bar
			b5A	enable probe	oFF	_on	_on	/
		b6_		Probe nr. 6
			b6C	mc3 oil pressure	-99.0	99.0	0.0	bar
			b6A	enable probe	oFF	_on	_on	/
		b7_		Probe nr. 7
			b7C	high pressure (HP)	-99.0	99.0	0.0	bar
			b7A	enable probe	oFF	_on	_on	/
		b8_		Probe nr. 8
			b8C	low pressure (LP)	-99.0	99.0	0.0	bar
			b8A	enable probe	oFF	_on	_on	/
	L__			Functions about alarm and stand-by
		LI_		Other alarm inputs
			L1H	enable mc1 alarm	oFF	_on	_on	/
			L1d	mc1 alarm delay	0	194 4:20:15	30:00	dd hh:mm:ss
			L2H	enable mc2 alarm	oFF	_on	_on	/
			L2d	mc2 alarm delay	0	194 4:20:15	30:00	dd hh:mm:ss
			L3H	enable mc3 alarm	oFF	_on	_on	/
			L3d	mc3 alarm delay	0	194 4:20:15	30:00	dd hh:mm:ss
			L4H	enable external override alarm	oFF	_on	_on	/
			L4d	override alarm delay	0	194 4:20:15	1:00:00	dd hh:mm:ss
			L5H	enable digital input 5 alarm (compressor phase monitor / thermal overload relay)	oFF	_on	_on	/
			L5d	digital input 5 alarm delay	0	194 4:20:15	1	dd hh:mm:ss
		Lo_		On / stand-by status
10			Loo	actual status: stand-by or on	oFF	_on	oFF	/
	d__			Functions about delays
		dF_		Delay from previous stop
			dF4	mc1 start delay	0	194 4:20:15	5:00	dd hh:mm:ss
			dF5	mc2 start delay	0	194 4:20:15	10:00	dd hh:mm:ss
			dF6	mc3 start delay	0	194 4:20:15	15:00	dd hh:mm:ss
			dS4	mc1 stop delay	0	194 4:20:15	45	dd hh:mm:ss
			dS5	mc2 stop delay	0	194 4:20:15	30	dd hh:mm:ss
			dS6	mc3 stop delay	0	194 4:20:15	15	dd hh:mm:ss
	F__			Functions about cooling capacity boost
		FP_		Functions about boost preference
			FPP	boost mode: 0=off / 1=on / 2=auto	0	255	2	/
			FPM	boost mode when not enough info is received: 0=off / 1=on	0	255	1	/
			FPd	delay before establishing that not enough info is received	0	194 4:20:15	5:00	dd hh:mm:ss
		FM_		Functions about pressure switches in boost mode
			FM0	suction low pressure regulation	0.0	99.0	1.8	(gauge) bar
			FMb	suction pressure regulation dead band	0.0	99.0	0.5	bar
			FMd	suction pressure regulation differential	0.0	99.0	0.2	bar
		FF_		Delays in boost mode
			FF4	mc1 start delay	0	194 4:20:15	1:00	dd hh:mm:ss
			FF5	mc2 start delay	0	194 4:20:15	5:00	dd hh:mm:ss
			FF6	mc3 start delay	0	194 4:20:15	10:00	dd hh:mm:ss
			FS4	mc1 stop delay	0	194 4:20:15	5:00	dd hh:mm:ss
			FS5	mc2 stop delay	0	194 4:20:15	1:00	dd hh:mm:ss
			FS6	mc3 stop delay	0	194 4:20:15	30	dd hh:mm:ss
	H__			Functions about hot gas mode
		HP_		Functions about hot gas preference
			HPP	hot gas mode: 0=off / 1=on / 2=all / 3=auto	0	255	3	/
			HPM	hot gas mode when not enough info is received: 0=off / 1=on / 2=all	0	255	1	/
			HPd	delay to enter hot gas mode = on	0	194 4:20:15	5:00	dd hh:mm:ss
			HPE	delay to enter hot gas mode = all	0	194 4:20:15	1:00	dd hh:mm:ss
		H1_		Functions about condenser fans when hot gas mode = on
			H1H	fan 1 start pressure	0.0	99.0	12.0	(gauge) bar
			H1L	fan 1 stop pressure	0.0	99.0	6.0	(gauge) bar
			H2H	fan 2 start pressure	0.0	99.0	13.0	(gauge) bar
			H2L	fan 2 stop pressure	0.0	99.0	11.0	(gauge) bar
			H3H	fan 3 start pressure	0.0	99.0	14.0	(gauge) bar
			H3L	fan 3 stop pressure	0.0	99.0	12.0	(gauge) bar
			H4H	fan 4 start pressure	0.0	99.0	15.0	(gauge) bar
			H4L	fan 4 stop pressure	0.0	99.0	13.0	(gauge) bar
		HA_		Functions about condenser fans when hot gas mode = all
			A1H	fan 1 start pressure	0.0	99.0	26.0	(gauge) bar
			A1L	fan 1 stop pressure	0.0	99.0	20.0	(gauge) bar
			A2H	fan 2 start pressure	0.0	99.0	25.0	(gauge) bar
			A2L	fan 2 stop pressure	0.0	99.0	23.0	(gauge) bar
			A3H	fan 3 start pressure	0.0	99.0	26.0	(gauge) bar
			A3L	fan 3 stop pressure	0.0	99.0	24.0	(gauge) bar
			A4H	fan 4 start pressure	0.0	99.0	27.0	(gauge) bar
			A4L	fan 4 stop pressure	0.0	99.0	25.0	(gauge) bar
		HS_		Delays in hot gas mode
			HS0	minimum stop delay for the last mc still running	0	194 4:20:15	2:00	dd hh:mm:ss
	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	/
		Pb_		Suction pressure broadcast
			PbH	enable suction pressure periodic broadcast over the PC net	oFF	_on	_on	/
			Pbd	delay between pressure broadcast messages	0	194 4:20:15	30	dd hh:mm:ss
			Pbb	delay between latest received message and broadcasting start	0	194 4:20:15	2:00	dd hh:mm:ss
			PbO	specify originating address in the pressure message	oFF	_on	_on	/
			Pb1	broadcast a packet with low pressure and without additional info	oFF	_on	oFF	/
			Pb2	broadcast a packet with low pressure and additional info	oFF	_on	_on	/
			PPM	become network master after Pbb delay	oFF	_on	oFF	/
			P2H	poll periodically second central unit for pressure broadcast	oFF	_on	oFF	/
			P2M	master address of second central unit	0	254	2	/
			P2d	delay between pressure broadcast messages of second central unit	0	194 4:20:15	30	dd hh:mm:ss
			P3H	poll periodically third central unit for pressure broadcast	oFF	_on	oFF	/
			P3M	master address of third central unit	0	254	3	/
			P3d	delay between pressure broadcast messages of third central unit	0	194 4:20:15	30	dd hh:mm:ss
		PO_		Output assignment
11			PO3	assign out-3 relay to: 0=condenser fan / 1=oil receiver solenoid / 2=alarm / 3=oil heater / 4=subcooler / 5=off / 6=NC oil sol / 7=oil sol plus subcooler on FAN / 8=NC oil sol plus subcooler on FAN / 9=fourth mc / 10=fourth mc plus subcooler on FAN	0	255	0	/
	I__			Functions about input-output and machine state (read only)
		IA_		Analog inputs
			IA1	oil receiver temperature	-55.0	145.0	-55.0	°C
			IA2	discharge temperature	-55.0	145.0	-55.0	°C
			IA3	suction temperature	-55.0	145.0	-55.0	°C
			IA4	oil pressure of mc1	0.0	30.0	0.0	(gauge) bar
			IA5	oil pressure of mc2	0.0	30.0	0.0	(gauge) bar
			IA6	oil pressure of mc3	0.0	30.0	0.0	(gauge) bar
			IA7	high pressure (HP)	0.0	30.0	0.0	(gauge) bar
			IA8	low pressure (LP)	0.0	30.0	0.0	(gauge) bar
		Id_		Digital input
			Id1	mc1 hardware safety	oFF	_on	oFF	/
			Id2	mc2 hardware safety	oFF	_on	oFF	/
			Id3	mc3 hardware safety	oFF	_on	oFF	/
			Id4	external override	oFF	_on	oFF	/
			Id5	phase software safety	oFF	_on	oFF	/
		OA_		Analog output
			OA1	condenser	0	255	0	/
			OA2	humidity - 4...20 mA	0	255	0	/
		Od_		Digital output
12			Od1	condenser fan 2	oFF	_on	oFF	/
			Od2	condenser fan 3	oFF	_on	oFF	/
			Od3	condenser fan 4	oFF	_on	oFF	/
			Od4	compressor 1	oFF	_on	oFF	/
			Od5	compressor 2	oFF	_on	oFF	/
			Od6	compressor 3	oFF	_on	oFF	/
			Od7	oil receiver solenoid - eventually connected to OUT-3	oFF	_on	oFF	/
			Od8	alarm - eventually connected to OUT-3	oFF	_on	oFF	/
			Od9	mc1 oil heater - eventually connected to OUT-3	oFF	_on	oFF	/
			Od0	digital output 3	oFF	_on	oFF	/
		OS_		Machine status
			OL0	actual set point	0.0	999.0	0.0	(gauge) bar
			OLb	actual dead band	-999.0	999.0	-999.0	bar
			OLd	actual differential	-999.0	999.0	-999.0	bar
			O1H	fan 1 start pressure	0.0	999.0	0.0	(gauge) bar
			O1L	fan 1 stop pressure	0.0	999.0	0.0	(gauge) bar
			O2H	fan 2 start pressure	0.0	999.0	0.0	(gauge) bar
			O2L	fan 2 stop pressure	0.0	999.0	0.0	(gauge) bar
			O3H	fan 3 start pressure	0.0	999.0	0.0	(gauge) bar
			O3L	fan 3 stop pressure	0.0	999.0	0.0	(gauge) bar
			O4H	fan 4 start pressure	0.0	999.0	0.0	(gauge) bar
			O4L	fan 4 stop pressure	0.0	999.0	0.0	(gauge) bar
			LLA	actual alarm - read only (0 means no alarm)	0	255	0	/
			OM0	suction low pressure regulation: 0=unload/1=neutral/2=load	0	255	0	/
			OM1	number of running compressors	0	255	0	/
			OM2	number of available compressors	0	255	0	/
			OML	low pressure is insufficient to load the first compressor	oFF	_on	oFF	/
			OMM	low pressure is insufficient and is going to unload the compressors	oFF	_on	oFF	/
			OMH	high pressure is excessive to load further compressors	oFF	_on	oFF	/
			OMi	high pressure is excessive and is going to unload the compressors	oFF	_on	oFF	/
1			OMF	compressor forcing for extreme winter conditions	oFF	_on	oFF	/
			OSF	boost mode	0	255	0	/
			OSH	hot gas mode	0	255	0	/
			OHd	timer to enter hot gas mode = on (in countdown-mode)	0	194 4:20:15	0	dd hh:mm:ss
			OHE	timer to enter hot gas mode = all (in countdown-mode)	0	194 4:20:15	0	dd hh:mm:ss
			OFM	not enough info is received	oFF	_on	oFF	/
			OFd	timer for not enough info (in countdown-mode)	0	194 4:20:15	0	dd hh:mm:ss
			ObH	autonomous pressure broadcast over the PC net	oFF	_on	oFF	/
			Obb	autonomous broadcast timer (in countdown-mode)	0	194 4:20:15	0	dd hh:mm:ss
			OF4	mc1 timer (in countdown-mode)	0	194 4:20:15	0	dd hh:mm:ss
			OF5	mc2 timer (in countdown-mode)	0	194 4:20:15	0	dd hh:mm:ss
			OF6	mc3 timer (in countdown-mode)	0	194 4:20:15	0	dd hh:mm:ss
			OF0	timer of first scheduled compressor (in countdown-mode)	0	194 4:20:15	0	dd hh:mm:ss
			OC0	number of active rooms connected to this central unit, and not lost	0	255	0	/
			OC1	number of rooms requiring liquid refrigerant	0	255	0	/
			OCH	number of rooms requiring hot gas	0	255	0	/
			OCt	number of rooms in turbo mode	0	255	0	/
			OCF	number of rooms in boost mode	0	255	0	/
	E__			Functions about slave preferences
		EY_		Functions about display
			EYY	input to show on display: 1=IA1 / 2=IA2 ...	0	255	8	/
			EYr	enable display rotation: 0=off / 1=all / 2=selected	0	2	0	/
		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	1	/
			E1t	label text during rotation	000	yyy	ot=	/
			E1E	duration of value display during rotation	0	255	0	/
		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	di=	/
			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	o1=	/
			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	o2=	/
			E5E	duration of value display during rotation	0	255	0	/
		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	o3=	/
			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	HP=	/
			E7E	duration of value display during rotation	0	255	4	/
		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	LP=	/
			E8E	duration of value display during rotation	0	255	4	/
		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	L0=	/
			E9E	duration of value display during rotation	0	255	4	/
		F0_		Functions about display rotation, when EYr=2 (repeated for each parameter)
			F0d	duration of label display during rotation	0	255	1	/
			F0t	label text during rotation	000	yyy	Lb=	/
			F0E	duration of value display during rotation	0	255	0	/
		F1_		Functions about display rotation, when EYr=2 (repeated for each parameter)
			F1d	duration of label display during rotation	0	255	1	/
			F1t	label text during rotation	000	yyy	Ld=	/
			F1E	duration of value display during rotation	0	255	0	/
		F2_		Functions about display rotation, when EYr=2 (repeated for each parameter)
			F2d	duration of label display during rotation	0	255	1	/
			F2t	label text during rotation	000	yyy	1H=	/
			F2E	duration of value display during rotation	0	255	0	/
		F3_		Functions about display rotation, when EYr=2 (repeated for each parameter)
			F3d	duration of label display during rotation	0	255	1	/
			F3t	label text during rotation	000	yyy	1L=	/
			F3E	duration of value display during rotation	0	255	0	/
		F4_		Functions about display rotation, when EYr=2 (repeated for each parameter)
			F4d	duration of label display during rotation	0	255	1	/
			F4t	label text during rotation	000	yyy	2H=	/
			F4E	duration of value display during rotation	0	255	0	/
		F5_		Functions about display rotation, when EYr=2 (repeated for each parameter)
			F5d	duration of label display during rotation	0	255	1	/
			F5t	label text during rotation	000	yyy	2L=	/
			F5E	duration of value display during rotation	0	255	0	/
		F6_		Functions about display rotation, when EYr=2 (repeated for each parameter)
			F6d	duration of label display during rotation	0	255	1	/
			F6t	label text during rotation	000	yyy	3H=	/
			F6E	duration of value display during rotation	0	255	0	/
		F7_		Functions about display rotation, when EYr=2 (repeated for each parameter)
			F7d	duration of label display during rotation	0	255	1	/
			F7t	label text during rotation	000	yyy	3L=	/
			F7E	duration of value display during rotation	0	255	0	/
		F8_		Functions about display rotation, when EYr=2 (repeated for each parameter)
			F8d	duration of label display during rotation	0	255	1	/
			F8t	label text during rotation	000	yyy	4H=	/
			F8E	duration of value display during rotation	0	255	0	/
		F9_		Functions about display rotation, when EYr=2 (repeated for each parameter)
			F9d	duration of label display during rotation	0	255	1	/
			F9t	label text during rotation	000	yyy	4L=	/
			F9E	duration of value display during rotation	0	255	0	/
		Eb_		Functions about buzzer
			EbH	enable buzzer	0	1	1	/
		EF_		Functions about slave default
			EFF	reload slave default parameters from EEPROM, at next restart	0	1	0	/

Parameter remarks

Nr.	Remark
1	To ensure operation in extreme winter conditions, respect to normal ones, compressors may be switched on sooner, and off later.
2	When MLH<MLL,there is a delay of 10*(MLL-MLH) seconds on lp switch. Eventual pumpdown restart is over MLH+1 bar.
3	Fixed time 120 s and manual reset.
4	In H425V3, starting from revision 03, when MU1 and MU3 are 5.0 and b4A and b6A are oFF, use 5NTC controller for compressors without oil pump; connect HP probe on AN-6 and LP on AN-7.
5	Caution! Selection by manual override forces compressor to run whatever the high and low pressure; no safety is left except hardware ones. In slave mode the output is used for partialization. In kriwan mode output is off for reset during stand-by.
6	Caution! The external override drives the compressors ignoring high and low pressure; no safety is left except hardware ones. It is recommended to close this contact passing through both contacts of a low pressure and high pressure switch like a kp15. The closed contact is interpreted as "load" while the open contact is neutral. The delays dF4 through dF6 are respected.
7	After the delay elapsed, the override forces a load. Automatic reset.
8	When speed regulation is off the fan is operated on-off.
9	Caution! Speed regulation can cause fan fault or electronic board fault. Low and average minimum speed can increase the risk.
10	Passing from stand-by to on and at power on, there is a 5 second delay spent in a virtual stand-by.
11	In H425V3, starting from revision 02, when PO3 is 4, OUT-3 drives the subcooler liquid solenoid; AN-1 input is the subcooler suction temperature; Mut is the wanted overheating, where 8.0 °C means 8.0 °C; maximum overheating is fixed at 99.0 °C; minimum overheating is fixed at 6.0 °C; n4H is the refrigerant type, where 0.1 bar means R404A; n4L is the cycle period, where 0.8 bar means 8 s; H4H is the initial on-time, where 0.5 bar means 5 s; H4L is the adaptation speed, where 0.8 bar means 8. To turn off the subcooler solenoid, set PO3 to 5. The subcooler is enabled just when all of the available motorcompressors are on. From revision 05, when PO3 is 4, the value of A4H*10, said k, determines when subcooler is on: for k<10 is on when OM2<=OM1+k, all mc are on, except at most k; for 10<=k<20 is on when k-10<=OM1, at least k-10 mc are on; for 20<=k is same of k equal to 0, all mc have to be on. Rest as in revision 02. When PO3 is 6, do as when PO3 is 1, but inverted contact (NC). When PO3 is 7, do as when PO3 is 1, plus subcooler on FAN, with oil temperature on AN-1, suction temperature on AN-3, and A4L as wanted overheating, where 8.0 bar means 8.0 °C; all the rest as above. When PO3 is 8, do as when PO3 is 6, plus subcooler on FAN; all the rest as above.
12	The minus sign on display ("-") signals that output is going to start after a delay.

Alarm list

Display	Alarm
A01	mc 1 alarm	Pressure switch, thermistors, or any other compressor safety device has disconnected.
A02	mc 2 alarm	Pressure switch, thermistors, or any other compressor safety device has disconnected.
A03	mc 3 alarm	Pressure switch, thermistors, or any other compressor safety device has disconnected.
A04	external override	The external override contact is driving the controller.
A05	mc phase	Compressor overload/thermal relay disconnected, or missing mains phase - manual reset.
A06	mc 1 oil pressure	Oil differential pressure remained under minimum value for 120 seconds - manual reset.
A07	mc 2 oil pressure	Oil differential pressure remained under minimum value for 120 seconds - manual reset.
A08	mc 3 oil pressure	Oil differential pressure remained under minimum value for 120 seconds - manual reset.
A09	EEPROM invalid	EEPROM invalid.
A10	EEPROM read start	EEPROM read start failure
A11	EEPROM read end	EEPROM read end failure
A12	EEPROM write start	EEPROM write start failure.
A13	EEPROM write end	EEPROM write end failure.
A14	EEPROM write max	EEPROM failure - reached the maximum number of writing attempts.
A15	Exc. pr. drop in w. f.	Excessive pressure drop through the water filter
A16	Ins. w. pr. in ev.	Insufficient water pressure drop through the evaporator
A17	Ins. w. pr. in any probe	Insufficient water pressure in any probe

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	Toggle between on and stand-by.
B4	left	Left navigation in the menu.
B5	down	Down navigation in the menu.
B6	right - menu - set	Right navigation in the menu - display and modify the set point - enter menu.

Led list

Led		Function
L1	compressor 1	On during compressor run - blinking slowly during activation and deactivation delay.
L2	compressor 2	On during compressor run - blinking slowly during activation and deactivation delay.
L3	compressor 3	On during compressor run - blinking slowly during activation and deactivation delay.
L4	condenser fan 1	On during condenser run.
L5	condenser fan 2	On during condenser run.
L6	condenser fan 3	On during condenser run.
L7	condenser fan 4	On during condenser run.

Soft command list

Soft command		Function
4	skip mc delay	Skip compressor delay.

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, leds from L1 to L7 blink, timers continue to count.
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 pressure 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 ML0, then confirm it.

Shortcut list

Buttons to press	Shortcut description - keep pressed 5 seconds
/	This instrument has no further shortcuts.

Led and push button location

Led and push button legend.