Alarm Relay Confi Guration; Probe Alarms - Carel EVD evolution User Manual

Type of alarm Cause of alarm
EEPROM dama- EEPROM for
ged operating and/or
unit parameters
damaged
EEV motor error Valve motor fault,
not connected
LAN error LAN network
communication
error
LAN network
connection error
Connection error NET LED
Display connec- No communi-
tion error cation between
driver and display
Adaptive control Tuning failed
ineff ective
Battery dischar- Battery dischar-
ged ged or faulty or
electrical connec-
tion interrupted
Wrong power DC driver power
supply mode (*) supply with "Po-
wer supply mode"
parameter set to
AC power supply
(*) In the event of AC power supply with the "Power supply mode"
parameter set to DC no alarm is displayed

9.2 Alarm relay confi guration

The relay contact is open when the driver is not powered.
During normal operation, it can be disabled (and thus will be always
open) or confi gured as:
•
alarm relay: during normal operation, the relay contact is closed, and
opens when any alarm is activated. It can be used to switch off the
compressor and the system in the event of alarms.
•
solenoid valve relay: during normal operation, the relay contact is
closed, and is open only in standby. There is no change in the event
of alarms.
•
solenoid valve relay + alarm: during normal operation, the relay
contact is closed, and opens in standby and/or for LowSH, MOP, High
Tcond and low suction temperature alarms. This is because following
such alarms, the user may want to protect the unit by stopping the
fl ow of refrigerant or switching off the compressor.
The LOP alarm is excluded, as in the event of low evaporation temperature
closing the solenoid valve would worsen the situation.
Parameter/description
Relay confi guration:
1=Disabled
2=alarm relay (opened in case of alarm)
3=Solenoid valve relay (open in standby)
4=valve + alarm relay (opened in stand-by and control alarms)
5= Reversed alarm relay (closed in case of alarm)
6= Valve status relay (open if valve is closed)
LED Display Relay
red alarm ALARM fl ashing Depends on
LED confi guration
parameter
red alarm ALARM fl ashing Depends on
LED confi guration
parameter
green ALARM fl ashing Depends on
NET LED confi guration
fl ashing parameter
NET LED ALARM fl ashing Depends on
off confi guration
parameter
No message No change
off
- Error message No change
- ALARM fl ashing No change
red alarm Alarm fl ashing No change
LED
fl ashing
Green - Depends on the
POWER confi guration
LED parameter
fl ashin-
gRed
alarm
LED
Tab. 9.a
Def.
Alarm
relay
Tab. 9.b
Reset Eff ect on control Checks/ solutions
Replace dri- Total shutdown
ver/Contact
service
automatic Interruption
automatic Control based on
DI1/DI2
automatic Control based on
DI1/DI2
automatic No eff ect
replace the No eff ect
driver/di-
splay
automatic No eff ect
replace the No eff ect
battery
Change Total shutdown
"Power sup-
ply mode"
parameter
setting

9.3 Probe alarms

The probe alarms are part of the system alarms. When the value measured
by one of the probes is outside of the fi eld defi ned by the parameters
corresponding to the alarm limits, an alarm is activated. The limits can be
set independently of the range of measurement. Consequently, the fi eld
outside of which the alarm is signalled can be restricted, to ensure greater
safety of the controlled unit.
Note:
•
the alarm limits can also be set outside of the range of measurement,
to avoid unwanted probe alarms. In this case, the correct operation
of the unit or the correct signalling of alarms will not be guaranteed;
•
by default, after having selected the type of probe used, the alarm
limits will be automatically set to the limits corresponding to the range
of measurement of the probe.
Parameter/description
PROBESs
S1 alarm MIN pressure (S1_
AL_MIN)
S1 alarm MAX pressure (S1_
AL_MAX)
S2 alarm MIN temp. (S2_AL_
MIN)
S2 alarm MAX temp. (S2_AL_
MAX)
S3 alarm MIN pressure (S3_
AL_MIN)
S3 alarm MAX pressure (S3_
AL_MAX)
S4 alarm MIN temp. (S4_AL_
MIN)
S4 alarm MAX temp. (S4_AL_
MAX)
"EVD evolution" +0300005EN - rel. 3.1 - 25.07.2011
43
Replace the driver/Contact service
Check the connections and the con-
dition of the motor
Switch driver off and on again
Check the network address settings
Check the connections and that the
pCO is on and working
Check the connections and that the
pCO is on and working
Check the driver/display and the
connectors
Change "Main control" parameter
setting
If the alarm persists for more than 3
hours (recharge time for EVBAT00500)
replace the battery
Check the "Power supply mode"
parameter and power supply
Def. Min. Max. UOM
-1 -20 (-290) S1_AL_MAX barg
(psig)
9.3 S1_AL_MIN 200 (2900) barg
(psig)
-50 -60 S2_AL_MAX °C/°F
105 S2_AL_MIN 200 (392) °C (°F)
-1 -20 S3_AL_MAX barg
(psig)
9.3 S3_AL_MIN 200 (2900) barg
(psig)
-50 -60 S4_AL_MAX °C/°F
105 S4_AL_MIN 200 (392) °C (°F)
ENG
Tab. 9.c