EVCO c-pro nano CHIL - Manual (Page 132)

C-PRO NANO CHIL AND C-PRO MICRO CHIL – APPLICATION MANUAL
Pag. 132
The accumulation temperature can be measured via the associated probe; in order to enable this
function, probe AI04 must be enabled as accumulation probe (PH44=3).
6.17.11Manual operation
The program allows the setting of manual operation for compressors and fans. In this condition,
devices are not involved in rotations, nor in thermoregulation calculations, although they do remain
sensitive to any alarms.
Manual operation of devices proves useful when functional tests are to be carried out on the
machine, to ascertain its integrity and correct functioning.
Compressors
Manual operation of compressors is guaranteed by parameter Compressor enable PM1x:
⋅
If set to Auto, it defines the normal behaviour of the device;
⋅
If set to Manu, it disables the compressor, switching it to manual operation.
A compressor in manual operation mode does not take part in regulations, and can be forced in its
number of steps that it can provide, by acting on the property Compressor forcing PM2x (present in
the MAin->MAnu menu).
As already previously mentioned, however, the compressor remains sensitive to any alarms and
related consequences.
In order to bring the compressor back to normal operation, parameter Compressor enable PM1x
must be re-set to Auto (Automatic) value; otherwise, the compressor in question would continue to
operate manually, thus failing to comply with any start/stop requests calculated by the configured
regulation.
Fans
Manual or automatic operation of the two condensing fans is guaranteed by parameters PM51
(Circuit # 1) and PM52 (Circuit # 2):
⋅
If set to Auto, it defines the normal behaviour of the device;
⋅
If set to Manu, it disables the fan, switching it to manual operation.
A manually-operated fan does not take part in regulations, and can be forced ON/OFF acting on
parameters PM61 and PM62 (found in the MAin->MAnu menu).
As already previously mentioned, however, the fan remains sensitive to any alarms and related
consequences.
In order to bring the fan back to normal operation, parameter PM51/PM52 must be re-set to “A”
(Automatic) value; otherwise, the fan in question would continue to operate manually, thus failing
to comply with any start/stop requests calculated by the configured regulation.
Summer set. PC81
OFF
ON
Accum. T
Diff. PC83