User manual - H424V1

Parameter list

Rem. Parameter Description Minimum Maximum Default Unit
S__Functions about storage
St_Functions about storage temperature
_t0storage room temperature-55.0145.02.0°C
_tddifferential0.050.00.2K
Fd_Functions about defrost duration and timing
Fd0immediate delay before next defrost0194 4:20:150dd hh:mm:ss
Fddon-time duration of the defrost0194 4:20:1530:00dd hh:mm:ss
Fdgdripping time after defrost0194 4:20:152:00dd hh:mm:ss
FdEevaporator fan activation delay after the defrost0194 4:20:157:00dd hh:mm:ss
1FdPoverall period of the defrost0194 4:20:154:00:00dd hh:mm:ss
FF_Functions about forced defrost
FFhenable forced defrost by keyboard short cutoFF_on_on/
FFdforced defrost duration0194 4:20:1530:00dd hh:mm:ss
2FFostart immediate forced defrostoFF_onoFF/
FP_Functions about defrost preference
FPtdefrost type: 0=none / 1=pause / 2=air / 3=electric / 4=hot gas / 5=heat pump / 6=heat pump by hp042/
Ft_Functions about defrost temperature
Fttdefrost stop temperature-55.0145.06.0°C
n__Functions about fans
nE_Functions about evaporator fans
nEHforce evaporator fans when refrigeration is offoFF_onoFF/
c__Functions about door and light
cP_Door switch and evaporator fan
cPHstop evaporator fans when door is openoFF_on_on/
cPFpause defrost timer when air defrost is suspended by evaporator fan stopoFF_on_on/
cPddelay of fan automatic switch on0194 4:20:1530:00dd hh:mm:ss
cI_Functions about light
cIHswitch on the light when the door is open and off when closedoFF_on_on/
3cIoswitch off the light automatically if it has been switched on from outsideoFF_on_on/
cIddelay of light automatic switch off0194 4:20:1530dd hh:mm:ss
v__Functions about electronic expansion valve
vP_Functions about electronic expansion valve preference
4vPHenable electronic expansion valveoFF_on_on/
vt_Functions about electronic expansion valve temperature
5vttwanted overheating (similar to Danfoss thermostatic overheating spring regulation)-999.0999.08.0K
vtUmaximum pressure allowed in the suction line (similar to Danfoss MOP)0.0999.010.0(gauge) bar
vd_Functions about electronic expansion valve timing
6vd1on-off duty cycle duration0194 4:20:158dd hh:mm:ss
7vd2on duty cycle duration at refrigeration start (set to 0 for previous stop value)0194 4:20:155dd hh:mm:ss
8vddon duty cycle adaptation speed (low value for slow adaptation and small swinging)02558/
b__Functions about probe calibration
b1_Probe nr. 1
b1Croom temperature-999.0999.00.0K
b1Aenable probeoFF_on_on/
b2_Probe nr. 2
b2Cdefrost temperature-999.0999.00.0K
b2Aenable probeoFF_on_on/
b3_Probe nr. 3
b3Csuction temperature-999.0999.00.0K
b3Aenable probeoFF_on_on/
L__Functions about alarm and stand-by
Lt_Temperature alarm
9LtLlow temperature alarm set point-55.0145.0-2.0°C
10LtHhigh temperature alarm set point-55.0145.014.0°C
Ltdalarm delay0194 4:20:1530:00dd hh:mm:ss
LO_Door alarm
LOHenable door alarmoFF_on_on/
LOddoor alarm delay0194 4:20:1530:00dd hh:mm:ss
LOttemperature alarm minimum delay after door opening0194 4:20:1515:00dd hh:mm:ss
Lo_On / stand-by status
Looactual status: stand-by or onoFF_onoFF/
P__Functions about master preferences
Pd_Functions about network address
PdMmaster address for global network communication02541/
PdSnumber of slaves connected to this master122/
I__Functions about input-output and machine state (read only)
IA_Analog inputs
IA1room temperature-55.0145.0-55.0°C
IA2defrost temperature-55.0145.0-55.0°C
IA3suction temperature-55.0145.0-55.0°C
Id_Digital input
Id4digital input 4 (door closure / remote defrost) - read by IA4oFF_onoFF/
OS_Machine status
OLPlow pressure (LP)0.0999.00.0(gauge) bar
OSnevaporator fan stopped by door opening or manual controloFF_onoFF/
LLAactual alarm - read only (0 means no alarm)02550/
Od_Digital output
11Od1solenoidoFF_onoFF/
11Od3lightoFF_onoFF/
11Od5evaporatoroFF_onoFF/
11Od6defrostoFF_onoFF/
S__Functions about storage
St_Functions about storage temperature
_t0storage room temperature-55.0145.02.0°C
_tddifferential0.050.00.2K
Fd_Functions about defrost duration and timing
Fd0immediate delay before next defrost0194 4:20:150dd hh:mm:ss
Fddon-time duration of the defrost0194 4:20:1530:00dd hh:mm:ss
Fdgdripping time after defrost0194 4:20:152:00dd hh:mm:ss
FdEevaporator fan activation delay after the defrost0194 4:20:157:00dd hh:mm:ss
1FdPoverall period of the defrost0194 4:20:154:00:00dd hh:mm:ss
FF_Functions about forced defrost
FFhenable forced defrost by keyboard short cutoFF_on_on/
FFdforced defrost duration0194 4:20:1530:00dd hh:mm:ss
2FFostart immediate forced defrostoFF_onoFF/
FP_Functions about defrost preference
FPtdefrost type: 0=none / 1=pause / 2=air / 3=electric / 4=hot gas / 5=heat pump / 6=heat pump by hp042/
Ft_Functions about defrost temperature
Fttdefrost stop temperature-55.0145.06.0°C
n__Functions about fans
nE_Functions about evaporator fans
nEHforce evaporator fans when refrigeration is offoFF_onoFF/
c__Functions about door and light
cP_Door switch and evaporator fan
cPHstop evaporator fans when door is openoFF_on_on/
cPFpause defrost timer when air defrost is suspended by evaporator fan stopoFF_on_on/
cPddelay of fan automatic switch on0194 4:20:1530:00dd hh:mm:ss
cI_Functions about light
cIHswitch on the light when the door is open and off when closedoFF_on_on/
3cIoswitch off the light automatically if it has been switched on from outsideoFF_on_on/
cIddelay of light automatic switch off0194 4:20:1530dd hh:mm:ss
v__Functions about electronic expansion valve
vP_Functions about electronic expansion valve preference
4vPHenable electronic expansion valveoFF_on_on/
vt_Functions about electronic expansion valve temperature
5vttwanted overheating (similar to Danfoss thermostatic overheating spring regulation)-999.0999.08.0K
vtUmaximum pressure allowed in the suction line (similar to Danfoss MOP)0.0999.010.0(gauge) bar
vd_Functions about electronic expansion valve timing
6vd1on-off duty cycle duration0194 4:20:158dd hh:mm:ss
7vd2on duty cycle duration at refrigeration start (set to 0 for previous stop value)0194 4:20:155dd hh:mm:ss
8vddon duty cycle adaptation speed (low value for slow adaptation and small swinging)02558/
b__Functions about probe calibration
b1_Probe nr. 1
b1Croom temperature-999.0999.00.0K
b1Aenable probeoFF_on_on/
b2_Probe nr. 2
b2Cdefrost temperature-999.0999.00.0K
b2Aenable probeoFF_on_on/
b3_Probe nr. 3
b3Csuction temperature-999.0999.00.0K
b3Aenable probeoFF_on_on/
L__Functions about alarm and stand-by
Lt_Temperature alarm
9LtLlow temperature alarm set point-55.0145.0-2.0°C
10LtHhigh temperature alarm set point-55.0145.014.0°C
Ltdalarm delay0194 4:20:1530:00dd hh:mm:ss
LO_Door alarm
LOHenable door alarmoFF_on_on/
LOddoor alarm delay0194 4:20:1530:00dd hh:mm:ss
LOttemperature alarm minimum delay after door opening0194 4:20:1515:00dd hh:mm:ss
Lo_On / stand-by status
Looactual status: stand-by or onoFF_onoFF/
I__Functions about input-output and machine state (read only)
IA_Analog inputs
IA1room temperature-55.0145.0-55.0°C
IA2defrost temperature-55.0145.0-55.0°C
IA3suction temperature-55.0145.0-55.0°C
Id_Digital input
Id4digital input 4 (door closure / remote defrost) - read by IA4oFF_onoFF/
OS_Machine status
OLPlow pressure (LP)0.0999.00.0(gauge) bar
OSnevaporator fan stopped by door opening or manual controloFF_onoFF/
LLAactual alarm - read only (0 means no alarm)02550/
Od_Digital output
11Od1solenoidoFF_onoFF/
11Od3lightoFF_onoFF/
11Od5evaporatoroFF_onoFF/
11Od6defrostoFF_onoFF/

Parameter remarks

Nr. Remark
1The period of each cycle includes on-time + off-time, that is the overall duration of the cycle.
2Following defrost cycles will be aligned to the end of forced one.
3No action if the light is switched on from inside the room.
4When off, the refrigeration solenoid is steadily on during cooling.
5Caution! Low overheating causes liquid return and compressor damage.
6Caution! Short duty cycle reduces valve life.
7Caution! Low overheating causes liquid return and compressor damage.
8Caution! High adaptation speed causes swing in the suction line and damage to the compressor.
9The low temperature differential is fixed, and alarm status stops at 0.2 °C above the set point.
10The high temperature differential is fixed, and alarm status stops at 0.2 °C under the set point.
11The minus sign on display ("-") signals that output is going to start after a delay.

Alarm list

Display Alarm
A01low temperatureLow temperature limit has been reached.
A02high temperatureHigh temperature limit has been reached.
A03door openTime limit for door opening has been reached.

Slave alarm list

Display Alarm
A96slave EEPROMFailed write operation onto the slave EEPROM.
A97out of rangeThe slave address EdS might be out of the master range, the latter going from 1 to PdS.
A98no linkThe slave does not receive any message from the master.
A99lost linkThe slave lost the communication with the master.

Button list

Push button Function
B1esc - silenceExit without saving from any menu - alarm buzzer silence.
B2upUp navigation in the menu.
B3on/stand-by - pauseToggle between on and stand-by - toggle evaporator fan stop.
B4left - lightLeft navigation in the menu - switch the light on and off.
B5down - defrostDown navigation in the menu - force immediate defrost.
B6right - menu - setRight navigation in the menu - display and modify the set point - enter menu.

Led list

Led Function
L1coolingOn during cooling.
L2evaporatorOn during evaporator run - blinking slowly during activation delay.
L3defrostOn during defrost - blinking slowly during dripping.
L4unusedUnused in this application.
L5unusedUnused in this application.
L6unusedUnused in this application.
L7lightOn 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.

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