Ascon Tecnologic Srl - X33H
– OPERATING INSTRUCTIONS – MX33HENG00 - PAGE 6
- if “dhCn”= drhC, the cooling action takes priority over
dehumidification (in practice, if at the same time there is a request
for cooling and one for dehumidification, only the CooL output is
activated, and when the active temperature Set is reached, the drh
output is also activated)
- if dhCn= HC, the cooling action takes priority over dehumidification
and the dehumidification action takes priority over heating (in
practice, if at the same time there is a request for cooling and one
for dehumidification, only the CooL output is activated, and when
the active temperature Set is reached, the HEAt output is also
activated).
- If, however, there is a request for heating and at the same time a
request for dehumidification, the HEAt and CooL outputs are
activated and when the active humidity Set is reached, only the
HEAt output remains activated.
4.7 - COMPRESSOR PROTECTION AND OUTPUT DELAY
FUNCTIONS
All the parameters regarding the compressor protection function
and the activation delays of the outputs are contained in the
“
]
PrC”
group
.
The compressor protection function carried out by the apparatus is
aimed at avoiding frequent interventions of any compressor
commanded by the appliance through the CooL output, and it
consists of 4 time checks operating simultaneously.
The first check envisages a delay in the activation of the CooL
output on the basis of that which is set in the
“PtC1”
parameter
(delay upon switching on).
Temp.
CooL
off
ON
SP t
time
HStt
off
off
off
ON
ON
Pr1
The second check envisages a block on the activation of the related
output if, from when the output was deactivated, the time set in the
“PtC2”
parameter (delay after power off) has not elapsed.
ON
CooL
off
PtC2
PtC2
PtC2
SP t
Temp.
time
HStt
ON
ON
off
off
Pr1
The third check envisages a block on the activation of the related
output if, from when the output was activated the last time, the time
set in the
“PtC3”
parameter (delay between one power on and
another) has not elapsed.
PtC3
CooL
off
SP t
ON
Temp.
PtC3
PtC3
time
HStt
off
off
ON
ON
Pr1
Lastly, the fourth check, by means of the
“LCt”
parameter, allows
the establishment of the minimum time of activation of the output, if
necessary delaying its deactivation, so as to avoid operating
periods of the compressor that are too short.
Similar activation delay checks are envisaged for the control of
heating HEAt (
“PtH”
par.), for the control of humidification rh
(
“Pthu”
par.), and for the control of dehumidification drh/CooL/HEAt
(
“Ptdh”
par.).
During all the override phases caused by the protection devices, the
LED related to the action delayed is flashing.
It is also possible to prevent the activation of all the outputs after the
appliance is switched on for the time set in the
“od”
par..
During the phase of delay upon switching on, the display will show
the indication
od
alternating with the normal programmed
messages.
The delay functions are deactivated when the related parameters
are programmed = OFF.
4.8 - DEFROST CONTROLLER
All the parameters regarding the control of defrosting, which acts on
the outputs configured as “CooL” and “dEF”, are contained in the
“
]
dEF”
group
.
The type of defrosting that the appliance is to carry out is
established by the
“dtyP”
par., which can be programmed:
= EL
- WITH ELECTRIC HEATING or BY COMPRESSOR
STOPPAGE. In this mode, during defrosting the “CooL” output is
deactivated while the “dEF” output (if configured) is activated.
= in
- WITH HOT GAS or CYCLE INVERSION. In this mode, during
defrosting the “CooL” and “dEF” outputs are activated.
The automatic execution of defrosting cycles occurs in accordance
with the interval programmed in the
“dint”
par., which establishes
the time that must elapse between two successive automatic
defrosting cycles.
Manual execution of defrosting cycles, on the other hand, can occur
using one of the 3 keys (U, UP/F1, DOWN/F2), if programmed = 3,
or by means of one of the 3 digital inputs, if programmed = 8 (see
OPERATION OF KEYS and DIGITAL INPUTS).
To start a manual defrosting cycle using the keypad, press the key
programmed for the defrosting function when not in programming
mode, and keep it pressed for approximately 5 seconds, after
which, if the necessary conditions are in place, the appliance will
carry out a defrosting cycle.
Inversely, pressing the key while defrosting is in progress
terminates the defrosting cycle.
Using one of the 3 digital inputs, if programmed = 9, it is similarly
possible to terminate a defrosting cycle in progress or to prevent
defrosting cycles.
The method of counting the defrosting cycle interval is established
by the
"dCt"
par., which can be programmed as follows:
= rt
- interval counted as total operating time (appliance on)
= ct
- interval counted as compressor operating time (CooL output
on).
The duration of the defrosting cycle can be determined by the time
or, if the evaporator sensor (Pr2) is used, when a set temperature is
reached.
If the evaporator sensor is not used, the duration of the cycle is
established by the
“dEFE”
par.
.
If the evaporator sensor is used, defrosting ceases when the
temperature measured by the Pr2 sensor exceeds the temperature
set in the
“tEdF”
par.
.
If this temperature is not reached within the time set in the “dEFE”
par., the defrosting is in any case interrupted.
For the purpose of avoiding unnecessary defrosting cycles, the
“tSdF”
par. is used for setting the temperature for enabling
defrosting.
If the temperature measured by the evaporator sensor is higher
than that set in the “tSdF” par., or than that set in the "tEdF" par.,
defrosting cycles are blocked.
Defrosting cycles are also blocked whenever the temperature Set
Point is programmed = OFF.
