Appendix Ii. Description Of The Parameters - Carel EVD4 User Manual

APPENDIX II. DESCRIPTION OF THE PARAMETERS

Parameter PV address Default
EVD%40%
and
EVD%43%
µC 2 off line D 24 0
100% capacity D 26 0
50% capacity D 25 0
Act. SH set A 10 0
Alarm Eeprom error D 42 0
Alarm HiT asp D 46 0
Alarm LOP timeout D 45 0
Alarm Low D 41 0
Superheat
Alarm MOP timeout D 44 0
Alarm probe error D 43 0
Alarms delay I 55 0
High SH
Alarms delay LOP I 53 60
Alarms delay I 52 60
Low SH
Alarms delay MOP I 54 0
Alarms delay probe I 48 10
error
Aux reg. I 56 0
Aux. probe confi g. I 69
Aux. probe limits I 44 9,3
Max
Aux. probe limits I 43 -1
Min
Battery presence I 63
Blocked valve check I 51 0
Calibr. S4 gain mA I 111 0
Calibr. S4 gain Volt I 113 0
Calibr. S4 offs mA I 112 0
Calibr. S4 offs Volt I 114 0
In this square the Driver+Valve system confi guration values are set.
These parameters have to be set and checked before starting up the unit.
Key:
= Main parameters required to start operation;
= Secondary parameters required for optimum operation.
Default Default Description UI
EVD%41% EVD%42%
and and
EVD%44% EVD%45%
0 0 active when µC 2 is not connected to
EVD 4
0 0 active when the capacity of the circuit
is 100%
0 0 active when the capacity of the circuit
is 50%
0 0 current superheat set point
0 0 active following an EEPROM memory
error
0 0 active in conditions with excessive
suction temperature
0 0 active in conditions with insuffi cient
evaporation pressure
0 0 active in low superheat conditions
0 0 active in conditions with excessive
evaporation pressure
0 0 active following an error on the signal
from the probe
0 0 high superheat temperature alarm delay
in CH mode
60 120 low evaporation pressure (LOP) alarm
delay
60 120 low superheat alarm delay
0 0 high evaporation pressure (MOP)
alarm delay
10 10 probe error alarm delay
0 0 type of auxiliary PID control
auxiliary probe confi guration
9,3 9,3 ratiometric end scale pressure S2
-1 -1 ratiometric zero pressure S2
enable valve not closed error
0 0 time after which the valve is considered
as being blocked
0 0 current gain on channel S4
0 0 voltage gain on channel S4
0 0 current offset on channel S4
0 0 voltage offset on channel S4
34
Meaning
The tLAN communication has been interrupted or has not been restored, see the
WARNING in par. 3.1.1
µC 2 has brought the capacity of the compressor to 100%, the information is sent to
4
EVD so as to preposition the electronic expansion valve
2
µC has brought the capacity of the compressor to 50%, the information is sent to
EVD 4 so as to preposition the electronic expansion valve
This is equal to CH-Superheat set (or similar for HP or DF), corrected if necessary by
the safety devices and/or the modulation, read-only
Fault in the EEPROM memory, the system may request a GO AHEAD; contact the
Carel technical service if the origin of the error is not clear
The temperature measured by the EVD 4 probe has exceeded the threshold value set
for the High superheat alarm threshold for a time greater than the Alarms delay High
SH, check if the delay confi gured is suitable for the application
Active in conditions with insuffi cient evaporation pressure, that is, when LOP is lower
than the set threshold for LOP Cool Mode (or LOP Defr. Mode or LOP Heat Mode) for
a time greater than the Alarms delay LOP, check if the delay confi gured is suitable for
the application
Active when the SH measured is lower than the set threshold for CH-Low Superheat
(or similar for HP or DF) for a time greater than the Alarms delay Low SH, check if the
timeout is suitable for the application
Active in conditions with excessive evaporation pressure, that is, when MOP is greater
than the set threshold for MOP Cool Mode (or MOP Defr. Mode or MOP Heat
Mode) for a time greater than the MOP delay, check if the timeout is suitable for the
application
The driver interprets a signal from the sensor that is outside of a determined range of
operation as being a probe error; the interval depends on the type of probe and the
input used, as described in table A. The system may request a GO AHEAD; contact the
Carel technical service if the origin of the error is not clear
This is the time that passes from when High superheat alarm threshold is continuously
exceeded to when the user wants the error to be displayed and/or managed
This is the time that passes from when the superheat temperature is continuously
less than the value set for LOP cool mode (or LOP Defr. Mode or LOP Heat Mode) to
when the user wants the error to be displayed and/or managed
This is the time that passes from when the value of superheat is continuously less than
the value set for CH-Low Superheat (or similar for HP or DF) to when the user wants the
error to be displayed and/or managed
This is the time that passes from when the superheat temperature is continuously
greater than the value set for MOP cool mode (or MOP Defr. Mode or MOP Heat
Mode) to when the user wants the error to be displayed and/or managed
This is the time that passes from when the Alarm probe error is continuously active to
when the user wants the error to be displayed and/or managed
"0 = no auxiliary control1 = enable high condensing temperature protection (see Hi
Tcond. protection)"
"Confi gured from pCO, this fi eld defi nes the third probe on the EVD
read only and sent to the pCO. The read options and the probes available depend on
the control settings:
- NTC
- NTCht
- Pt1000
- Pressure"
Value corresponding to 100% of the pressure read by the ratiometric probe connected
to channel S2
Value corresponding to 0% of the pressure read by the ratiometric probe connected
to channel S2
used if EVD 4 is installed with a backup battery, enables the EEV not closed error (see
the corresponding description of the parameter), from pCO
If SH is high and the valve is open or if SH is low and the valve is closed, the valve
may be considered blocked. This parameter defi nes the delay before performing,
respectively, a forced closing or a forced opening.
This is the correction to the end scale in the calibration of channel S4, used to receive
a 4-20 mA signal when the driver is operating as a positioner
This is the correction to the end scale in the calibration of channel S4, used to receive a
0-10 Volt signal when the driver is operating as a positioner
This is the correction to the deviation from zero in the calibration of channel S4, used
to receive a 4-20 mA signal when the driver is operating as a positioner
This is the correction to the deviation from zero in the calibration of channel S4, used
to receive a 0-10 Volt signal when the driver is operating as a positioner
EVD 4 +030220227 - rel. 2.1 - 12.06.2008
4 , the probe is