1592023040 XM668D GB r1.1 2011.07.05.doc
XM668D
5/14
The
Adr
parameter cannot be duplicated because in this case the defrost
cannot be correctly managed.
BEGIN
Press for 3 sec, the
rtC
or other will be showed.
The measurement unit blinks.
Find Adr
Press more than once the DOWN arrow to find the
Adr
parameter, the press
SET
.
Modify
Adr
or
Set the value of
Adr
parameter, then press
SET
to
confirm the parameter.
EXIT
Press the two keys together to exit from menu or
wait for about 10 sec.
The
LSn
and
LAn
parameter are only to show the actual settings (read only). Se the
following example of configuration
:
DAILY DEFROST FROM RTC: [CbP = Y] and [EdF = rtC]
idF
Parameter
: for safety reason force the value of
idF
at +1 respect to the interval
between two
Ld
parameters. The
idF
timer is reinitialized after defrost and at every
power-on.
DEFROST START:
at the time selected by the parameters
Ld1
to
Ld6
or
Sd1
to
Sd6
.
DEFROST END:
if the probes reach the
dtE
temperature
or for maximum
MdF
time.
SAFETY and rtC or rtF ALARM:
with clock alarm
the device will use the parameter
idF, dtE
and
MdF
.
WARNING: don’t set [EdF=rtC] and [CPb=n].
MULTIMASTER DEFROST
: all the probes with clock
Table for example
Par.
Unit A (RTC)
Unit B (RTC)
Unit C (RTC)
Adr
n
N + 1
N + 2
EdF
rtC (clock)
rtC (clock)
rtC (clock)
CbP
Y
Y
Y
IdF
9 hours safety
9 hours safety
9 hours safety
MdF
45 min safety
45 min safety
45 min safety
dtE
12°C safety
12°C safety
12°C safety
Ld1
06:00 1°
06:00 1°
06:00 1°
Ld2
14:00 2°
14:00 2°
14:00 2°
Ld3
22:00 3°
22:00 3°
22:00 3°
10.
DISPLAY MESSAGES
Display Causes
Notes
KEYBOARD
1
nod
No display: the keyboard is trying
to work with another board that is
not working or not present
Press for 3 sec UP arrow, enter
the
SEC
menu and select
LOC
entry.
2
Pon
Keyboard is unlocked
3
PoF
Keyboard is locked
4
rSt
Alarm reset
Alarm output deactivated
5
noP, nP
nA
Not present (configuration)
Not available (evaluation)
ALARM FROM PROBE INPUT
6
P1
P2
P3
P4
P5
P6
PPF
CPF
Sensor brake down, value out of
range or sensor incorrectly
configured
P1C
,
P2C
to
P6C
.
PPF
can be showed by slaves of
pressure that don’t receive the
value of pressure.
CPF
is showed when the remote
probe 4 is not working.
P1
: the cooling output works
with
Con
and
COF
,
With defrost probe on error the
defrost is performed only at
interval.
For
P5
,
P6
and
PPF
: the
percentage of the valve
opening is fixed at
PEO
value.
TEMPERATURE ALARM
7
HA
Temperature alarm from parameter
ALU on probe
rAL
.
8
LA
Temperature alarm from parameter
ALL on probe
rAL
.
9
HAd
Alarm from parameter
dLU
on
probe defrost probe [
dPa
/
dPb
].
10
LAd
Alarm from parameter
dLU
on
probe defrost probe [
dPa
/
dPb
].
11
HAF
Alarm from parameter
FLU
on
probe defrost probe [
FPa
/
FPb
].
12
LAF
Alarm from parameter
FLL
on
probe defrost probe [
FPa
/
FPb
].
DIGITAL INPUT ALARM
13
dA
Door open alarm from input
i1F
,
i2F
or
i3F
= after delay
d1d
,
d2d
or
d3d
.
Cooling relay and fan follow the
odc
parameter. Cooling restart
as specified on
rrd
parameter.
14
EA
Generic alarm from digital input
i1F
,
i2F
,
i3F=EAL
.
15
CA
Severe alarm of regulation lock
from digital input
i1F
,
i2F
,
i3F=bAL
.
Regulation output OFF.
16
PAL
Pressure switch lock
i1F
,
i2F
o
i3F
=
PAL
.
All the outputs are OFF.
ELECTRONIC VALVE ALARM
17
LOP
Minimum operating pressure
threshold from
LOP
parameter.
The valve output increases its
opening of
dML
quantity every
second.
18
MOP
Maximum operating pressure
threshold from MOP parameter.
The valve output decreases its
opening of
dML
quantity every
second.
19
LSH
Low superheating from
LSH
parameter and
SHd
delay.
The valve will be closed; the
alarm will be showed after
SHd
delay.
20
HSH
High superheating from
HSH
parameter and
SHd
delay.
Only display.
CLOCK ALARM
21
rtC
Clock settings lost.
Defrost will be performed with
IdF
till restoring the settings of
RTC.
22
rtF
Clock damaged.
Defrost will be performed with
IdF
.
OTHERS
23
EE
EEPROM serious problem.
Output OFF.
24
Err
Error with upload/download
parameters.
Repeat the operation.
25
End
Parameters have been correctly
transferred.
10.1
ALLARM RECOVERY
Probe alarms
P1
,
P2
,
P3
and
P4
start some seconds after the fault in the related
probe; they automatically stop some seconds after the probe restarts normal
operation. Check connections before replacing the probe.
Temperature alarms
HA
,
LA
,
HA2
and
LA2
automatically stop as soon as the
temperature returns to normal values.
Alarms
EA
and
CA
(with
i1F
=
bAL
)
recover as soon as the digital input is disabled.
Alarm
CA
(with
i1F
=
PAL
) recovers only by
switching off and on
the instrument.
11.
USE OF THE PROGRAMMING “HOT KEY“
The XM units can UPLOAD or DOWNLOAD the parameter list from its own E2
internal memory to the
HOT-KEY
and vice-versa through a TTL connector. Using
HOT-KEY the Adr will not changed
.
11.1
DOWNLOAD (FROM THE HOT-KEY TO THE INSTRUMENT)
1.
Turn OFF the instrument by means of the ON/OFF key, insert the
HOT-KEY
and then turn the unit ON.
2.
Automatically the parameter list of the
HOT-KEY
is downloaded into the
controller memory: the
doL
message is blinking. After 10 seconds the
instrument will restart working with the new parameters. At the end of the data
transfer phase the instrument displays the following messages:
End
for right
programming. The instrument starts regularly with the new programming.
Err
for failed programming. In this case turn the unit off and then on if you want to
restart the download again or remove the
HOT-KEY
to abort the operation.
11.2
UPLOAD (FROM THE INSTRUMENT TO THE “HOT KEY”)
1.
When the XM unit is ON, insert the
HOT-KEY
and push è key; the
uPL
message appears.
2.
The UPLOAD begins; the
uPL
message is blinking.
3.
Remove the
HOT-KEY
.
At the end of the data transfer phase the instrument
displays the following messages:
End
= right programming;
Err
= failed programming. In this case push
SET
key if you want to restart the
programming again or remove the not programmed
HOT-KEY
.
12.
CONTROLLING LOADS
12.1
THE COOLING OUTPUT
The regulation is performed according to the temperature measured by the
thermostat probe that can be physical probe or virtual probe obtained by a weighted
average between two probes following the formula:
value_for_room_regulation = (rPA*rPE + rPb*(100-rPE))/100
If the temperature increases and reaches set point plus differential the solenoid valve
is opened and then it is closed when the temperature reaches the set point value
again.In case of fault in the thermostat probe the opening and closing time of
solenoid valve is configured by
Con
and
CoF
parameters.
12.2
STANDARD REGULATION AND CONTINUOUS REGULATION
The regulation can be performed in three ways: the goal of the first way (
standard
regulation
) is reaching the best superheat via a classic temperature regulation
obtained using hysteresis. The second way permits to use the valve to realize an high
performance temperature regulation with a good factor of superheat precision.
This
