Carel EVD Evolution Twin - 9.2 Alarm relay configuration

ENG
“EVD Evolution TWIN” +0300006EN - rel. 2.6 - 31.01.2019
52
Type of alarm Cause of
the alarm
LED Display Relay Reset Eects on
control
Checks/ solutions
EEPROM dama-
ged
EEPROM for
operating and/or
unit parameters
damaged
red alarm
LED
ALARM ashing Depends on
conguration
parameter
Replace
controller/
Contact
service
Total shutdown Replace the controller/Contact
service
EEV motor error Valve motor fault,
not connected
red alarm
LED
ALARM ashing Depends on
conguration
parameter
automatic Interruption Check the connections and the con-
dition of the motor. Switch controller
o and on again
LAN error LAN network
communication
error
green
NET LED
ashing
ALARM ashing Depends on
conguration
parameter
automatic Control based on
DI1/DI2
Check the network address settings
LAN network
connection error
NET LED
o
ALARM ashing Depends on
conguration
parameter
automatic Control based on
DI1/DI2
Check the connections and that the
pCO is on and working
Display
connection error
No communi-
cation between
controller and
display
- ERROR message No change Replace
controller/
disply
No eect Check the controller/display and
connectors
Driver B
disconnected
Connection error,
driver B
red alarm
LED B
ALARM ashing Depends on
conguration
parameter
automatic Driver B: forced
closing
Driver A: no eect
Replace the controller
Alarms active on
driver A (1)
Generic error,
driver A
red alarm
LED A
ALARM ashing No change automatic No eect See list of alarms for driver A
Alarms active on
driver B (2)
Generic error,
driver B
red alarm
LED B
ALARM ashing No change automatic No eect See list of alarms for driver B
Battery
discharged (**)
Battery discharged
or faulty or elec-
trical connection
interrupted
red alarm
LED
ashing
Alarm ashing No change replace the
battery
No eect If the alarm persists for more than 3
hours (recharge time for EVBAT00500)
replace the battery
Adaptive control
ineective
Tuning failed - ALARM ashing No change automatic No eect Change “Main control” parameter
setting
Wrong power
supply mode (*)
DC driver power
supply with “Po-
wer supply mode”
parameter set to
AC power supply
Green
POWER
LED
ashin-
gRed
alarm
LED
- Depends on the
conguration
parameter
Change
“Power sup-
ply mode”
parameter
setting
Total shutdown Check the “Power supply mode”
parameter and power supply
Pressure
dierence
Maximum pressu-
re dierence th-
reshold exceeded
(S1-S3)
Red alarm
LED
ALARM ashing Depends on the
conguration
parameter
Automatic Depends on the
"Probe S1/S3
alarm manage-
ment" parameters
Check the probe connections. Check
the parameters "Probe S1/S3 alarm
management" and "Pressure S1/
S3: MINIMUM and MAXIMUM alarm
values"
Temperature
dierence
Maximum pressu-
re dierence th-
reshold exceeded
(S2-S4)
Red alarm
LED
ALARM ashing Depends on the
conguration
parameter
Automatic Depends on the
"Probe S2/S4
alarm manage-
ment" parameters
Check the probe connections. Check
the parameters "Probe S2/S4 alarm
management" and "Temperature S2/
S4: MINIMUM and MAXIMUM alarm
values"
Tab. 9.a
1) Message that appears at the end of the list of alarms for driver B.
(2) Message that appears at the end of the list of alarms for driver A.
(*) In the event of AC power supply with “Power supply mode” set to DC, no
alarm is displayed
(**) Alarm only visible if driver connected to EVDBAT00400 battery module
9.2 Alarm relay conguration
The relay contacts are open when the controller is not powered.
During normal operation, the relay can be disabled (and thus will be always
open) or con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 o 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, HiTcond and low
suction temperature alarms. This is because following such alarms, the
user may want to protect the unit by stopping the ow of refrigerant or
switching o the compressor. The LOP alarm is excluded, as in the event
of low evaporation temperature closing the solenoid valve would worsen
the situation.
• Direct control: the relay is actuated by a variable accessible by serial;
• Failed closing alarm relay (open with alarm);
• Reverse failed closing alarm relay (closed with alarm).
In the event of a mains power failure, if the driver is connected to the Ultracap
module, the forced emergency valve closing procedure starts and the red
LED comes. At the end of the emergency closing procedure, the outcome is
indicated by the value of the parameter “Failed closing alarm status”:
0 = Closing successful;
1 = Closing failed.
The driver will then switch o. If the closing procedure fails, when next
restarting, if the parameter “Relay conguration” = 8 or 9 the display will show
the “Battery discharged” alarm and the relay will be activated based on the
setting (open or closed).
Note: the “Battery discharged” alarm:
has no aect on the positioning of the valve, it is signal-only; is not activated if
the driver has a direct current power supply (Vdc).