Unit Status; Change Parameters; Operating Logic - Hoffman Nvent CUVN Manual De Uso Y Mantenimiento

C UVN - CU ON - T R AS L AT E D IN S T R U C T IO N
meaning is described in the table below.
LED
• If on = compressor active.
[5]
• If flashing = delay against close start-ups.
• If on = evaporator fan active.
[6]
• If flashing = evaporator fan start-up delay.
[7] • Alarm present.
• If on = SEM in progress.
[8]
• If flashing = SEM
• If on = heater active.
[9]
• If flashing = heater ignition delay.
• If on = unit of measurement.
[10]
• If flashing = programming.
EN Fast display menu
Without entering the programming mode, it is possi-
ble to display some temperature values related to the
probes (B1, B2, B3. B4) and to the operating percent-
age value of the analog outputs (AO1, A02) connected
to the electronic board. By pressing keys [3] and [4] it is
possible to scroll through the parameters, by pressing
[2] the value can be displayed, by pressing [2] again, the
display is exited. The analog input or output is in error
if the "Err" flashing value is displayed, it is not enabled
if the "nu" value (not used) is displayed. The data is dis-
played depending on the configuration/programming
of the unit.

Unit status

The ON/OFF status can be activated by the [1] but-
ton. The stand-by status is connected to the Remote
Enable digital input. If the contact is opened, the con-
troller performs no adjustments and switches off all the
devices connected to the analog and digital outputs.
The OFF status has priority over the Stand-by status.
User menu [label] (default value):
Label Parameter Description
SET
Colling set point.
ΠΠ
Main machine
ΠOT
Machine active maximum time.
ΠSH
Differential for machine in stand-by.
HY
Colling hysteresis.
SEH
Heating set point.
HYH
Heating hysteresis.
FCΠ
Fan, control mode.
Fdi
Fan, delta inhibition.
Fdr
Fan, delta reactivation.
Fti
Fan, inhibition time
Ftr
Fan, reactivation time.
38
Meaning
2 in progress.
Default Value (Range)
25 or 35
no
0
5
2
15
2
ON
10
5
5
1
FFd
Fan, delay on Shutdown.
rES
Full, decimal resolution.
ALL
Low temperature alarm.
ALU
High temperature alarm.
AdO
Stand-by status alarm.
Adr
Serial address.
Br
Baud rate.

Change parameters

To display the set point, press and release the [2] key. To
display the internal temperature again, wait 5 seconds
or press the [2] key again. To change the set point, press
for the key [2] at least 2 seconds, the set point value is
displayed and the LED [10] starts to flash. Change the
value with the keys [3] and [4]. To store the value, press
[2] or wait 15 seconds to exit the procedure. To change
the value of a parameter, access programming mode,
the LED [10] starts to flash. Select the desired param-
eter by pressing the [2] key, change the value with keys
[3] and [4]. To store the value, press the [2] key and go to
the next parameter.

Operating logic

Cooling: it will be active when the temperature read
by the probe will be greater than or equal to the value
[SET] + [HY], it will be disabled at the value of [SET]. To
be enabled, the following conditions must be met: the
minimum Shutdown time or the minimum time since
the compressor was been previously switched on has
elapsed. It will also be deactivated if the unit is in OFF
status, if the remote command input is open or if there
are alarms that require it to be deactivated.
Heating: it will be active when the temperature read by
the probe will be less than or equal to the value [SEH]
– [HYH], it will be disabled at the value of [SEH]. It will
also be deactivated if the unit is in OFF status, if the
remote command input is open or if there are alarms
that require it to be deactivated.
Evaporator fan management: the fan can follow three
operating logics:
– Always functioning (FCΠ=ON): the fan only switches
off if the unit is in OFF status, if the remote control input
is open or if there are alarms that require it to be deac-
tivated. In the first two cases, the fan switches off after
the delay time on shutdown has elapsed.
– SEM function (Smart Energy Management) (FCΠ=SE):
the fan enters SEM mode when the temperature is less
than or equal to the value [SET] – [Fdi] and exits at the
value [SET] – [Fdr]. During the mode the fan is switched
on for the reactivation time (Ftr) and is switched off for
the inhibition time (Fti). In the other cases the fan is
EN/02.2019 ELDON – all rights reserved
0
dE
15
50
no
1
96