User manual - H422V9

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
_tbdead band0.050.00.0K
_tddifferential0.050.00.2K
_tHmaximum set point of temperature from slave keyboard-55.0145.045.0°C
_tLminimum set point of temperature from slave keyboard-55.0145.0-55.0°C
_i0storage room humidity0.0100.085.0%
_ibdead band0.050.00.0%
_iddifferential0.050.05.0%
_iHmaximum set point of humidity from slave keyboard0.0100.0100.0%
_iLminimum set point of humidity from slave keyboard0.0100.00.0%
SA_Functions about air renew during storage
SAHenable air renew during storageoFF_onoFF/
SA0immediate delay before first air renew0194 4:20:150dd hh:mm:ss
SAdon-time duration in the air renew cycle0194 4:20:1530:00dd hh:mm:ss
SAPperiod of air renew cycle0194 4:20:1512:00:00dd hh:mm:ss
SAhenable forced air renew by keyboard short cutoFF_on_on/
SAFforced air renew duration0194 4:20:1530:00dd hh:mm:ss
SAostart / stop forced air renewoFF_onoFF/
Fd_Functions about defrost duration and timing
1Fd0immediate 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
2FdEmaximum evaporator fan activation delay after the defrost0194 4:20:1515:00dd hh:mm:ss
FdFminimum evaporator fan activation delay after the defrost0194 4:20:155:00dd hh:mm:ss
3FdPoverall period of the defrost0194 4:20:154:00:00dd hh:mm:ss
Fd1evaporator fan pulse duration (0.001 s units - select 0 for no pulse during defrost)02550/
Fd2evaporator fan pulse period0194 4:20:151:00dd hh:mm:ss
4Fd3defrost delay at power on0194 4:20:154:00:00dd hh:mm:ss
FdYtemperature display timeout after end of defrost - resets IA1=OS4=OS50194 4:20:1520:00dd 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
5FFostart immediate forced defrostoFF_onoFF/
FP_Functions about defrost preference
6FPtdefrost type: 0=none / 1=pause / 2=air / 3=electric / 4=hot gas / 5=heat pump / 6=heat pump by hp02552/
7FPFforced defrost type: 0=none / 1=pause / 2=air / 3=electric / 4=hot gas / 5=heat pump / 6=heat pump by hp02552/
FPrsave defrost status into the real time clockoFF_onoFF/
FPHactivate defrost output during defrostoFF_on_on/
FPIactivate defrost output during forced defrostoFF_on_on/
Ft_Functions about defrost temperature
8Fttdefrost stop temperature-55.0146.06.0°C
FtFforced defrost stop temperature-55.0146.025.0°C
FtPevaporator fan activation temperature after the defrost-55.0146.0-20.0°C
M__Functions about compressor
MU_Functions about pressure switches
MLHlow pressure safety restart ( similar to Danfoss KP15 lp set point )0.099.00.4(gauge) bar
MLLlow pressure safety stop ( similar to Danfoss KP15 lp set point - differential )0.099.00.2(gauge) bar
MLddelay of low pressure safety stop0194 4:20:1510dd hh:mm:ss
MLUlow pressure stop during pump down (intentional stop)0.099.00.3(gauge) bar
MHHhigh pressure safety stop ( similar to Danfoss KP15 hp set point )0.099.028.0(gauge) bar
MHLhigh pressure safety restart ( similar to Danfoss KP15 hp set point - differential )0.099.024.0(gauge) bar
9MUOminimum oil differential pressure0.030.02.0(gauge) bar
10MUUenable pump downoFF_on_on/
MUMmaximum pump down duration0194 4:20:151:00dd hh:mm:ss
MULlow pressure forcing mc restart (repump down)0.099.01.0(gauge) bar
MUdminimum delay for mc restarts (repump down)0194 4:20:1515:00dd hh:mm:ss
MUbdo pump down before going to stand-byoFF_onoFF/
H__Heating
HP_Heating preference
HPPheating method: 0=none / 1=electric / 2=hot gas / 3=heat pump / 4=intern heat pump / 5=ihp202550/
HPFheating source: 0=dedicated heating / 1=defrost / 2=light020/
HPdheating delay0194 4:20:153:00dd hh:mm:ss
U__Dehumidification
UP_Dehumidification preference
11UPPdehumidification type: 0=none / 1=force refr / 2=force heat / 3=alternate / 4=outer02550/
UPHenable humidificationoFF_onoFF/
n__Functions about fans
nc_Functions about condenser fans
ncHenable condenser fans when compressor is off and discharge pressure is over maximumoFF_on_on/
12ncrenable condenser fans speed regulationoFF_on_on/
13ncUfan minimum speed025540/
ncdminimum HP-LP-difference to keep on fans0.099.02.0(gauge) bar
n1Hfan 1 start pressure ( similar to Danfoss KP5 set point ) - active just when ncr is oFF0.099.010.0(gauge) bar
14n1Lfan 1 stop pressure ( similar to Danfoss KP5 set point - differential )0.099.06.0(gauge) bar
nE_Functions about evaporator fans
nEHforce evaporator fans when refrigeration is offoFF_onoFF/
nEMforce evaporator fans when humidification is onoFF_onoFF/
nE0enable evaporator fans when refrigeration is required but does not workoFF_onoFF/
nEEdelay before establishing that refrigeration does not work0194 4:20:1530:00dd hh:mm:ss
nEthigh defrost probe temperature forcing evaporator fan stop during cooling-55.0146.025.0°C
nEddifferential0.099.05.0K
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/
15cIoswitch 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
16vPHenable electronic expansion valveoFF_on_on/
vPPrefrigerant 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=R455A02550/
17vPdnetwork originating address of the pressure broadcast02550/
vPCthe room is served by a central refrigerating unitoFF_onoFF/
vPSsynchronize the liquid solenoid start with the central unitoFF_onoFF/
vP0delay before establishing that not enough info is received from the central unit0194 4:20:155:00dd hh:mm:ss
vt_Functions about electronic expansion valve temperature
18vttwanted overheating (similar to Danfoss thermostatic overheating spring regulation)0.099.08.0K
19vtHmaximum overheating0.099.099.0K
vtImaximum low pressure (LP) to activate vtH parameter (maximum overheating)0.099.00.1(gauge) bar
20vtLminimum overheating0.099.06.0K
vtFminimum overheating during hot gas defrost or heating0.099.012.0K
vtPwanted overheating increase when evaporator fans are off during cooling0.099.016.0K
vtUmaximum pressure allowed in the suction line (similar to Danfoss MOP)0.030.010.0(gauge) bar
vtvminimum high pressure (HP) to activate vtU parameter (MOP)0.099.024.0(gauge) bar
vd_Functions about electronic expansion valve timing
21vd1on-off duty cycle duration0194 4:20:158dd hh:mm:ss
22vd2on duty cycle duration at refrigeration start (set to 0 for previous stop value)0194 4:20:155dd hh:mm:ss
23vddon duty cycle adaptation speed (low value for slow adaptation and small swinging)02558/
vF_Functions about turbo mode (forcing-on the expansion valve)
24vFPturbo mode: 0=off / 1=on / 2=auto02552/
vFdturbo mode delay0194 4:20:1530:00dd hh:mm:ss
vFHsuction pipe overheating for turbo mode activation0.099.012.0K
vFtdifference between room and set point required for turbo mode0.099.01.0K
vb_Functions about cooling capacity boost (raising a flag for the central unit)
vbPboost mode: 0=off / 1=on / 2=auto02552/
vbdboost mode delay0194 4:20:151:00:00dd hh:mm:ss
25vbHroom descent ramp, per hour, under which boost mode is activated0.099.00.5K
vbtdifference between room and set point required for boost mode0.099.02.0K
b__Functions about probe calibration
b1_Probe nr. 1
b1Croom temperature-99.099.00.0K
b1Aenable probeoFF_on_on/
b2_Probe nr. 2
b2Cdefrost temperature-99.099.00.0K
b2Aenable probeoFF_on_on/
b3_Probe nr. 3
b3Csuction temperature-99.099.00.0K
b3Aenable probeoFF_on_on/
b4_Probe nr. 4
26b4Cengine room temperature-99.099.00.0K
b4Aenable probeoFF_on_on/
b5_Probe nr. 5
b5Chumidity-99.099.00.0%
b5Aenable probeoFF_onoFF/
b6_Probe nr. 6
b6Chigh pressure (HP)-99.099.00.0bar
b6Aenable probeoFF_on_on/
b7_Probe nr. 7
b7Clow pressure (LP)-99.099.00.0bar
b7Aenable probeoFF_on_on/
b8_Probe nr. 8
b8Cdischarge temperature-99.099.00.0K
b8Aenable probeoFF_on_on/
b9_Probe nr. 9
b9Coil pressure - eventually connected to AN-5-99.099.00.0bar
b9Aenable probeoFF_onoFF/
L__Functions about alarm and stand-by
Lt_Temperature alarm
LtEalarm enableoFF_on_on/
27LtLlow temperature alarm set point-55.0145.0-2.0°C
28LtHhigh temperature alarm set point-55.0145.014.0°C
Ltdalarm delay0194 4:20:1530:00dd hh:mm:ss
LF_Full stop temperature alarm
LFEalarm enableoFF_on_on/
LFLlow temperature alarm set point-55.0145.0-5.0°C
LFHhigh temperature alarm set point-55.0145.020.0°C
LFdalarm delay0194 4:20:1530:00dd hh:mm:ss
Li_Humidity alarm
LiEalarm enableoFF_onoFF/
LiLlow humidity alarm set point0.0100.00.0%
LiHhigh humidity alarm set point0.0100.0100.0%
Lidalarm delay0194 4:20:1530:00dd hh:mm:ss
Lj_Full stop humidity alarm
LjEalarm enableoFF_onoFF/
LjLlow humidity alarm set point0.0100.00.0%
LjHhigh humidity alarm set point0.0100.0100.0%
Ljdalarm delay0194 4:20:1530:00dd hh:mm:ss
Ld_Low discharge overheating alarm
LdEalarm enableoFF_onoFF/
Ldorefrigerant overheating at the compressor outlet-99.099.016.0K
Lddalarm delay0194 4:20:155:00dd hh:mm:ss
LE_Stop for low discharge overheating alarm
LEEalarm enableoFF_on_on/
LESalarm showoFF_onoFF/
LEorefrigerant overheating at the compressor outlet-99.099.012.0K
LEdalarm delay0194 4:20:1510:00dd hh:mm:ss
LEFalarm reset delay0194 4:20:155:00dd hh:mm:ss
LM_High discharge temperature alarm
LMEalarm enableoFF_onoFF/
LMthigh temperature alarm set point-55.0146.0105.0°C
LMdalarm delay0194 4:20:151:00dd hh:mm:ss
Ln_Stop for high discharge temperature alarm
LnEalarm enableoFF_on_on/
LnSalarm showoFF_onoFF/
Lnthigh temperature alarm set point-55.0146.0110.0°C
Lndalarm delay0194 4:20:151:00dd hh:mm:ss
LnFalarm reset delay0194 4:20:155:00dd 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
LI_Other alarm inputs
L1Henable digital input 1 alarm (compressor safety devices)oFF_on_on/
L1ddigital input 1 alarm delay0194 4:20:1530:00dd hh:mm:ss
L2Henable digital input 2 alarm (evaporator safety)oFF_on_on/
L2ddigital input 2 alarm delay0194 4:20:1530:00dd hh:mm:ss
L3Henable digital input 3 alarm (heating safety thermostat)oFF_on_on/
L3ddigital input 3 alarm delay0194 4:20:1530:00dd hh:mm:ss
L5Henable digital input 5 alarm (compressor phase monitor / thermal overload relay)oFF_on_on/
L5ddigital input 5 alarm delay0194 4:20:151dd hh:mm:ss
Lo_On / stand-by status
29Looactual status: stand-by or onoFF_onoFF/
d__Functions about delays
dP_Delay at power on
30dP4delay at power on for relay nr. 4 - compressor0194 4:20:1515:00dd hh:mm:ss
dF_Delay from previous stop
dF4delay from stop to activation of relay nr. 4 - compressor0194 4:20:155:00dd hh:mm:ss
P__Functions about master preferences
Pd_Functions about network address
PdMmaster address for global network communication02541/
PdSnumber of slaves connected to this master122/
PO_Output assignment
PO2assign out-2 relay to: 0=alarm / 1=heating / 2=steam / 3=air renew / 4=defrost duty / 5=steam on FAN / 6=outer dehum / 7=OUT1 / 8=OUT3 / 9=OUT4 / 10=OUT5 / 11=OUT6 / 12=FAN / 13=alarm NO / 14=fan off dehum / 15=drain pump / 16=ss FAN / 17=16+2rm / 18=17+drp / 19=18+sdrp OUT6 / 20=5+14 / 21=alt heat ev / 22=19+ss OUT3 / 23=depr OUT2 / 24=Loo / 25=off / 26=ss OUT3 / 27=mc part / 28=eco OUT3 / 29=28+ip / 30=27+28 / 31=27+29 / 32=29+es AN2 / 33=27+32 / 34=ev FAN / 35=34+2 / 36=ss / 37=34+2mcs / 38=37+steam OUT302550/
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
IA4engine room temperature-55.0145.0-55.0°C
IA5humidity0.0100.00.0%
IA6high pressure (HP)0.030.00.0(gauge) bar
IA7low pressure (LP)0.030.00.0(gauge) bar
IA8discharge temperature-55.0145.0-55.0°C
IA9oil pressure - eventually connected to AN-50.030.00.0(gauge) bar
Id_Digital input
Id1compressor hardware safetyoFF_onoFF/
Id2evaporator hardware safetyoFF_onoFF/
Id3defrost hardware safetyoFF_onoFF/
Id4door closedoFF_onoFF/
Id5phase software safetyoFF_onoFF/
OA_Analog output
OA1condenser02550/
OA2humidity - 4...20 mA02550/
Od_Digital output
31Od1solenoidoFF_onoFF/
Od2heatingoFF_onoFF/
Od3lightoFF_onoFF/
Od4compressoroFF_onoFF/
Od5evaporatoroFF_onoFF/
Od6defrostoFF_onoFF/
Od7alarm - eventually connected to OUT-2oFF_onoFF/
Od8steam producer - eventually connected OUT-2oFF_onoFF/
Od9air renew - eventually connected to OUT-2oFF_onoFF/
Od0digital output 2oFF_onoFF/
OS_Machine status
OS0actual set point-55.0145.0-55.0°C
OS1low pressure (LP)0.0999.00.0(gauge) bar
OS2refrigerant saturation temperature corresponding to the low pressure-55.0145.0-55.0°C
OS3refrigerant overheating at the compressor inlet-999.0999.0-999.0K
OS4temperature before defrost - reads IA1 at range reentering after defrost-55.0145.0-55.0°C
OS5set point temperature during defrost - reads IA1 at range reentering after defrost-55.0145.0-55.0°C
25OS6room descent ramp, per hour-999.0999.0-999.0K
OS7refrigerant saturation temperature corresponding to the high pressure-55.0145.0-55.0°C
OS8refrigerant overheating at the compressor outlet-999.0999.0-999.0K
OSSdefrost status: 1=normal / 2=defr / 3=drip / 4=fan delay / 5=forced / 6=wait02550/
LLAactual alarm - read only (0 means no alarm)02550/
OSFdefrost timer (in countdown-mode)0194 4:20:150dd hh:mm:ss
OSYtimer of the temperature display timeout, after the end of defrost (see FdY)0194 4:20:150dd hh:mm:ss
Ov0timer for not enough info (in countdown-mode)0194 4:20:150dd hh:mm:ss
OCHcompressor hour counter01193046:28:150h...h:mm:ss
OSbspecial defrost display in progress - affects OS4 and OS5 (see FdY)oFF_onoFF/
ObYinstrument not in stand-by (instrument on)oFF_onoFF/
OStthe instrument reached the set temperatureoFF_onoFF/
OSnevaporator fan stopped by door opening or manual controloFF_onoFF/
Ontevaporator fan stopped by defrost temperatureoFF_onoFF/
OSHcompressor stopped by high pressureoFF_onoFF/
OSLcompressor stopped by low pressureoFF_onoFF/
OSdcompressor stopped by low discharge overheatingoFF_onoFF/
OSEcompressor stopped by high discharge temperatureoFF_onoFF/
OSUcompressor running for pump downoFF_onoFF/
MOPMOP limitation intervened recentlyoFF_onoFF/
OUPdehumidification in progressoFF_onoFF/
OPCthe room is served by a central refrigerating unitoFF_onoFF/
Ov1not enough info is received from the central unitoFF_onoFF/
On0refrigeration is required but not workingoFF_onoFF/
Onvliquid refrigerant required from the central unitoFF_onoFF/
OnHhot gas required from the central unitoFF_onoFF/
OnFturbo modeoFF_onoFF/
Onbboost modeoFF_onoFF/
E__Functions about slave preferences
Ed_Functions about network address
EdSslave address for local network communication12541/
EY_Functions about display
EYYinput to show on display: 1=IA1 / 2=IA2 ...02551/
EYrenable display rotation: 0=off / 1=all / 2=selected020/
E0_Functions about display rotation, when EYr=1
E0dduration of label display during rotation02551/
E0Eduration of value display during rotation02552/
E1_Functions about display rotation, when EYr=2 (repeated for each parameter)
E1dduration of label display during rotation02550/
E1tlabel text during rotation000yyyrM=/
E1Eduration of value display during rotation02556/
E2_Functions about display rotation, when EYr=2 (repeated for each parameter)
E2dduration of label display during rotation02551/
E2tlabel text during rotation000yyydE=/
E2Eduration of value display during rotation02550/
E3_Functions about display rotation, when EYr=2 (repeated for each parameter)
E3dduration of label display during rotation02551/
E3tlabel text during rotation000yyySU=/
E3Eduration of value display during rotation02550/
E4_Functions about display rotation, when EYr=2 (repeated for each parameter)
E4dduration of label display during rotation02551/
E4tlabel text during rotation000yyyEr=/
E4Eduration of value display during rotation02550/
E5_Functions about display rotation, when EYr=2 (repeated for each parameter)
E5dduration of label display during rotation02551/
E5tlabel text during rotation000yyyrH=/
E5Eduration of value display during rotation02554/
E6_Functions about display rotation, when EYr=2 (repeated for each parameter)
E6dduration of label display during rotation02551/
E6tlabel text during rotation000yyyHP=/
E6Eduration of value display during rotation02550/
E7_Functions about display rotation, when EYr=2 (repeated for each parameter)
E7dduration of label display during rotation02551/
E7tlabel text during rotation000yyyLP=/
E7Eduration of value display during rotation02550/
E8_Functions about display rotation, when EYr=2 (repeated for each parameter)
E8dduration of label display during rotation02551/
E8tlabel text during rotation000yyydI=/
E8Eduration of value display during rotation02550/
E9_Functions about display rotation, when EYr=2 (repeated for each parameter)
E9dduration of label display during rotation02551/
E9tlabel text during rotation000yyyoI=/
E9Eduration of value display during rotation02550/
F0_Functions about display rotation, when EYr=2 (repeated for each parameter)
F0dduration of label display during rotation02551/
F0tlabel text during rotation000yyy_t=/
F0Eduration of value display during rotation02554/
F1_Functions about display rotation, when EYr=2 (repeated for each parameter)
F1dduration of label display during rotation02551/
F1tlabel text during rotation000yyyLP=/
F1Eduration of value display during rotation02550/
F2_Functions about display rotation, when EYr=2 (repeated for each parameter)
F2dduration of label display during rotation02551/
F2tlabel text during rotation000yyyLt=/
F2Eduration of value display during rotation02550/
F3_Functions about display rotation, when EYr=2 (repeated for each parameter)
F3dduration of label display during rotation02551/
F3tlabel text during rotation000yyyoh=/
F3Eduration of value display during rotation02550/
F4_Functions about display rotation, when EYr=2 (repeated for each parameter)
F4dduration of label display during rotation02551/
F4tlabel text during rotation000yyybF=/
F4Eduration of value display during rotation02550/
F5_Functions about display rotation, when EYr=2 (repeated for each parameter)
F5dduration of label display during rotation02551/
F5tlabel text during rotation000yyySF=/
F5Eduration of value display during rotation02550/
F6_Functions about display rotation, when EYr=2 (repeated for each parameter)
F6dduration of label display during rotation02551/
F6tlabel text during rotation000yyyMP=/
F6Eduration of value display during rotation02550/
F7_Functions about display rotation, when EYr=2 (repeated for each parameter)
F7dduration of label display during rotation02551/
F7tlabel text during rotation000yyyHt=/
F7Eduration of value display during rotation02550/
F8_Functions about display rotation, when EYr=2 (repeated for each parameter)
F8dduration of label display during rotation02551/
F8tlabel text during rotation000yyyod=/
F8Eduration of value display during rotation02550/
Eb_Functions about buzzer
EbHenable buzzer011/
EF_Functions about slave default
EFFreload slave default parameters from EEPROM, at next restart010/
EP_Functions about slave password
32EPAset a new password000yyy___/

Parameter remarks

Nr. Remark
1Defrost is not performed twice in case safety switches of mc or evaporator are not ok.
2The evaporator fans are restarted after FdF delay and before FdE delay, as soon as the defrost temperature reaches FtP.
3The period of each cycle includes on-time + off-time, that is the overall duration of the cycle.
4Eventually disabled by the parameter FPr.
5Following defrost cycles will be aligned to the end of forced one.
6Add 100 to FPt parameter to enable the outer defrost drive on INP-4. The defrost is initiated by INP-4 closure; after defrost and until INP-4 is closed, the instrument does not leave the dripping mode, to coordinate with eventual other instruments.
7In H422V9, starting from revision 09, when FPt or FPF is 6, Ftt and FtF set the HP dew temperature that stops heat pump defrost.
8In case of hot gas defrost, both IA2 and IA3 must reach Ftt.
9Fixed time 120 s and manual reset.
10When activated, a clever pump down algorithm coordinates the solenoid, the evaporator and the mc. There is no concurrent run of mc and electric defrost or heating.
11Forced refrigeration is disabled when room temperature is under LFL, forced heating is disabled over LFH.
12When speed regulation is off the fan is operated on-off.
13Caution! Speed regulation can cause fan fault or electronic board fault. Low and average minimum speed can increase the risk.
14During the first 10 seconds of speed regulation, the n1L is replaced by (n1H+n1L)/2.
15No action if the light is switched on from inside the room.
16When off, the refrigeration solenoid is steadily on during cooling, without any safety. Use turbo mode for better control.
17The address of the central unit who is broadcasting pressure (usually 1). Use 0 for previous application H425V1 with no origin specification.
18Caution! Low overheating causes liquid return and compressor damage.
19Overheating over the maximum forces valve anticipated opening.
20Overheating under the minimum delays valve opening.
21Caution! Short duty cycle reduces valve life.
22Caution! Low overheating causes liquid return and compressor damage.
23Caution! High adaptation speed causes swing in the suction line and damage to the compressor.
24In turbo mode, the liquid refrigerant solenoid opens over vtt overheating, and closes at vtL. In H422V9, starting from revision 34, to enable turbo during heat pump, add 10 for on-mode and 20 for auto-mode.
25Positive values mean temperature descent.
26In H422V9, starting from revision 14, when b1A is on, b4A is off, and b4C is non-zero, use AN-4 reading with set at 0.0 °C + b4C to concur for low temperature alarm and to stop cooling.
27The low temperature differential is fixed, and alarm status stops at 0.2 °C above the set point.
28The high temperature differential is fixed, and alarm status stops at 0.2 °C under the set point.
29Passing from stand-by to on and at power on, there is a 5 second delay spent in a virtual stand-by.
30In case a crankcase heater is installed, a long delay is advised. Press Esc to skip compressor delay.
31The minus sign on display ("-") signals that output is going to start after a delay.
32The use of this parameter is restricted to ReFreeX authorized personnel; further detail is available on demand. This parameter is not implemented on every instrument. The value and the action of this parameter are local to each slave. If you are unsure, during action relative to this parameter, press B1 at any moment. Three underscores, three zero digits, and three empty-characters are considered trivial password values; any other combination of three alphanumeric characters is a non-trivial password. If a non-trivial password value is set, then entering the menu, the label PAS is shown. Press B6, then introduce the password, confirm by B6, and press B4. If the introduced value does not match the saved password, then the label PAS is shown again, and the operation may be retried for a maximum of other two times. In case of unlocking failure, the label bAd is shown. To exit, press B4 twice or B1 once. To remove the password, set EPA to value 000 . To set or to change the password, if you know the authorization code, set EPA to a new non-trivial value, and exit the menu. The label rEP is shown. Press B6, then reintroduce the same password, confirm by B6, and press B4. The label AUt is shown. Press B6, then introduce the authorization code, confirm by B6, and press B4.

Alarm list

Display Alarm
A01low temperatureLow temperature limit has been reached.
A02high temperatureHigh temperature limit has been reached.
A03mc alarmPressure switch, thermistors, or any other compressor safety device has disconnected.
A04evaporator alarmEvaporator thermal relay, or other evaporator safety device has disconnected.
A05defrost alarmdefrost safety thermostat, or any other defrost safety device has disconnected.
A06door openTime limit for door opening has been reached.
A07mc phaseCompressor overload/thermal relay disconnected, or missing mains phase - manual reset.
A08low temp stopLow temperature limit for full stop has been reached - full system stop - manual reset.
A09high temp stopHigh temperature limit for full stop has been reached - full system stop - manual reset.
A10oil pressureOil differential pressure remained under minimum value for 120 seconds - manual reset.
A11low humidityLow humidity limit has been reached
A12high humidityHigh humidity limit has been reached.
A13low humid stopLow humidity limit for full stop has been reached - full system stop - manual reset.
A14high humid stopHigh humidity limit for full stop has been reached - full system stop - manual reset.
A15RTC memory lossMemory loss of real time clock [RTC] - timer reset.
A16EEPROM invalidEEPROM invalid.
A17EEPROM read startEEPROM read start failure
A18EEPROM read endEEPROM read end failure
A19EEPROM write startEEPROM write start failure.
A20EEPROM write endEEPROM write end failure.
A21EEPROM write maxEEPROM failure - reached the maximum number of writing attempts.
A22low discharge ohRefrigerant overheating at compressor outlet went under alarm threshold.
A23low disch oh stopRefrigerant overheating at compressor outlet went under alarm threshold - compressor stop - delayed reset.
A24high discharge tRefrigerant temperature at compressor outlet went over alarm threshold.
A25high disch stopRefrigerant temperature at compressor outlet went over alarm threshold - compressor stop - delayed reset.
A26power cutPower has been restored after a cut.

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 - silence - skipExit without saving from any menu - alarm buzzer silence - skip compressor delay.
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 or skip the one in progress.
B6right - menu - setRight navigation in the menu - display and modify the set point - enter menu.

Led list

Led Function
L1compressorOn during compressor run - blinking slowly during activation delay and pumpdown.
L2evaporatorOn during evaporator run - blinking slowly during activation delay and pumpdown.
L3defrost-hum-dehOn during defrost and humidification - blinking slowly during dripping and dehumidification.
L4air renewOn during air renew.
L5heatingOn during heating.
L6unusedUnused in this application.
L7lightOn when lighting is on - blinking slowly during deactivation delay.

Soft command list

Soft command Function
4skip mc delaySkip compressor delay.
5skip defrostSkip defrost in progress and enter fan pause.
6reset mc counterReset compressor hour counter.
13reset all instrument alarmsReset all the instrument alarms and all the alarm counters.

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 an air renew.Keep pressed B2.
Force or skip a defrost.Keep pressed B5.

Shortcut list

Buttons to press Shortcut description - keep pressed 5 seconds
B5 Force an immediate defrost, or skip the one in progress.
B2 Force an immediate air renew.

Led and push button location

Led and push button legend.

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