Stulz Cosmotec CVE Series, Use And Maintenance Manual

Page: 26 / 88

situation alarm is shown on display and digital output (general
alarm) is enabled.
Condensation pressure probe fault (only LN version):
is fault (short circuit or interruption) control waits a time since event
(10 sec) after switches off all analogic and digital outputs of the
devices: compressor, heater (if present), evaporator fan and
condenser fan. In this situation alarm is shown on display and digital
output (general alarm) is enabled.
Intake high temperature (only three phase models, except
CV(E/O)60-CV(E/O)4000): allarm is ON after time Exclusion alarm
power cp (30 sec) from switching on of the compressor and if the
temperature of the probe Suction temperature is
suction temperature. In this case there is a uncorrect temperature
on the suction tube of the compressor. If the alarm is present, it
switch off digital ind analogic outputs of the devices. In this situation
alarm is shown on display and digital output (gene
enabled. In case alarm is present check correct sequence of the
phases. The reset of the alarm is manual, it is necessary to press key
Down for 3 seconds and if the Suction temperature will have to
Set point alarm suction temperature - Hysteresis alarm suction
temperature (condition in according to ambient temperature too).
LABEL MEANING
MODE
P1
alarm probe B1 flashing
P4
alarm probe B4 alternation to temp.
HA
alarm high temperature B1 alternation to temp.
LA
alarm low temperature B1 alternation to temp.
HP
alarm high pressure alternation to temp.
SEC
alarm sequence alternation to temp.
HAS alarm sunction temperature alternation to temp
Check unit mode
Check unit mode is attivable only when controller is on state ON, to
enter on check unit mode press key DOWN + ON/OFF at least 5
seconds. Procedure will start, sequence of step is enable pressing
key UP, with key DOWN come back previous step.
On check unit mode it is necessary to consider safety alarms from
device, in detail: hige pressure switch and sequence phase alarm,
intake.
Step 1:
- Activation evaporator fan is on “Fan always ON”
- Display flashing message “FAn”, it means that evaporator fan is
forced on
Step 2:
- No function. Skip to step 3
Step 3:
- Activation compressor and condenser fan by
time switch off compressor, minium time between two start of
compressor.
- Display flashing message “CPr”, it means that unit is forced on
cooling mode
Step 4:
- Disactivation compressor by-passing minimum time switch off
compressor, minium time between two start of compressor.
-
Disactivation condenser fan
- Activation heater
- Display flashing message “Htr”, it means that heater is forced
on
26
situation alarm is shown on display and digital output (general
(only LN version): in case probe
is fault (short circuit or interruption) control waits a time since event
off all analogic and digital outputs of the
heater (if present), evaporator fan and
condenser fan. In this situation alarm is shown on display and digital
Intake high temperature (only three phase models, except
allarm is ON after time Exclusion alarm
power cp (30 sec) from switching on of the compressor and if the
temperature of the probe Suction temperature is
≥ Set point alarm
ction temperature. In this case there is a uncorrect temperature
on the suction tube of the compressor. If the alarm is present, it
switch off digital ind analogic outputs of the devices. In this situation
alarm is shown on display and digital output (general alarm) is
enabled. In case alarm is present check correct sequence of the
phases. The reset of the alarm is manual, it is necessary to press key
Down for 3 seconds and if the Suction temperature will have to
≤
eresis alarm suction
temperature (condition in according to ambient temperature too).
MODE
flashing
alternation to temp.
alternation to temp.
alternation to temp.
alternation to temp.
alternation to temp.
alternation to temp
Check unit mode is attivable only when controller is on state ON, to
check unit mode press key DOWN + ON/OFF at least 5
seconds. Procedure will start, sequence of step is enable pressing
key UP, with key DOWN come back previous step.
On check unit mode it is necessary to consider safety alarms from
pressure switch and sequence phase alarm,
Activation evaporator fan is on “Fan always ON”
Display flashing message “FAn”, it means that evaporator fan is
condenser fan by-passing minimum
time switch off compressor, minium time between two start of
Display flashing message “CPr”, it means that unit is forced on
passing minimum time switch off
essor, minium time between two start of compressor.
Display flashing message “Htr”, it means that heater is forced
Step 5:
- Exit check unit mode and return to normal functioning
If time of a step is ≥ a 30 min or controller is reactivated, unit exit
automatically from check unit mode.
Signal type
GENERAL ALARM: when there is an alarm it is shown on display and
corresponding digital output changes state. 1 pole type, change
over contact (max 8A resistivity e 2A inductive, 250Vac). Alarm
occurs also in case of power supply is missing.
REMOTE ENABLE: contact NC, voltage f
“Stb”.
8. INSTALLATION
ATTENTION!
Unit has to be installed in according national standard of state that
it sold
ATTENTION!
The unit must be handled using the appropriate lifting devices
inserting the eyebolts (M6/M8
General indication before installation
Make sure following points before installation:
-
installation site must not be excessively dirty and moist
ATTENTION
In case the ambient is particularly wet, condensate water can
create on compressor and it can come out from holes on the base
- cabinet on which the air conditioner has to be installed has a
IP54, or higher, protection degree
-
make sure that available voltage is correct
- the interior of the cabinet is clean
- holes, screws, wires do not interface with the equipment
already installed
-
air conditioner will work on vertical position (laid perfectly)
Choosing of installation place
- cabinet is not located near to heat sources or hot air flows
- if it installed on the door, make sure that the hinges can support
the weight of the unit
-
if the depth of the exchanger prevents the door from opening
fully, fit a door stop
-
make sure that there is enough space both internally and
externally
-
the internal of the cabinet allows a correct circulation of air,
avoiding recirculation
-
make sure that the supply and intake air openings are free and
there is at least a distance of 200mm from walls or construction
elements
-
make sure that it is possible to carry out a correct system of
discharge of condensate
CVE-CVO
Exit check unit mode and return to normal functioning
min or controller is reactivated, unit exit
automatically from check unit mode.
GENERAL ALARM: when there is an alarm it is shown on display and
corresponding digital output changes state. 1 pole type, change
e 2A inductive, 250Vac). Alarm
occurs also in case of power supply is missing.
REMOTE ENABLE: contact NC, voltage free signal. Shown message
ATTENTION!
Unit has to be installed in according national standard of state that
it sold
ATTENTION!
The unit must be handled using the appropriate lifting devices
M6/M8) in the prearranged holes.
General indication before installation
Make sure following points before installation:
installation site must not be excessively dirty and moist
ATTENTION!
In case the ambient is particularly wet, condensate water can
create on compressor and it can come out from holes on the base
cabinet on which the air conditioner has to be installed has a
make sure that available voltage is correct
the interior of the cabinet is clean
holes, screws, wires do not interface with the equipment
air conditioner will work on vertical position (laid perfectly)
cabinet is not located near to heat sources or hot air flows
if it installed on the door, make sure that the hinges can support
epth of the exchanger prevents the door from opening
make sure that there is enough space both internally and
the internal of the cabinet allows a correct circulation of air,
ly and intake air openings are free and
there is at least a distance of 200mm from walls or construction
make sure that it is possible to carry out a correct system of
discharge of condensate