49
ENGLISH
μC
2
SE - +030220426 - rel. 2.1 - 09.06.2010
- Alarm reset
P05:
Enables automatic reset for all those alarms that normally feature manual reset (high
pressure, low pressure, fl ow switch/antifreeze) as per the following table:
P05= 0:
(default) high pressure, low pressure and antifreeze (low temperature) with manual reset;
P05= 1:
all the alarms with automatic reset;
P05= 2:
high pressure and antifreeze (low temperature) manual, low pressure automatic;
P05= 3:
high pressure manual, low pressure and antifreeze (low temperature) automatic;
P05= 4:
high and low pressure manual, antifreeze (low temperature) automatic;
P05= 5:
high and low pressure manual after the third activation in one hour*, antifreeze (low
temperature) automatic;
P05= 6:
high and low pressure manual after the third activation in one hour*, antifreeze (low
temperature) manual.
- Cooling/Heating logic
P06:
If this parameter is set to 1, the operating logic of the Cooling/Heating logic is reversed (from
the keypad, the remote control and the digital input).
Symbol
P06= 0
P06= 1
Cooling (Chiller)
Heating (heat pump)
Heating (heat pump)
Cooling (Chiller)
- Low pressure alarm with pressure probes
P07:
P07=0: this function is disabled.
P07=1: if in heat pump mode the evaporator (external exchanger) pressure is less than 1 bar (and
if the presence of the condenser pressure probe is enabled), the low pressure alarm is activated
(while still considering the delay P03).
Note:
P07=1 the LP digital inputs in heat pump are ignored.
- Select digital input ID1
P08= 0:
none;
P08= 1:
fl ow switch with manual reset (normally closed);
P08= 2:
fl ow switch with automatic reset (N.C.);
P08= 3:
general thermal overload with manual reset (N.C.);
P08= 4:
general thermal overload with automatic reset (N.C.);
P08= 5:
thermal overload circuit 1 with manual reset (N.C.);
P08= 6:
thermal overload circuit 1 with automatic reset (N.C.);
P08= 7:
thermal overload circuit 2 with manual reset (N.C.);
P08= 8:
thermal overload circuit 2 with automatic reset (N.C.);
P08= 9:
cooling/heating (open = Cooling, closed = Heating) if H06= 1;
P08= 10: cooling/heating with delays d12 and d13 (open = Cooling, closed = Heating) if H06= 1;
P08= 11: alarm signal with manual reset (N.C.);
P08= 12: alarm signal with automatic reset (N.C.);
P08= 13: second set point from external contact (cooling and heating), (normally open);
P08= 14: second cooling set point from external contact and heating from time band (N.O.);
P08= 15: end defrost from external contact circuit 1 (N.C.);
P08= 16: end defrost from external contact circuit 2 (N.C.);
P08= 17: end defrost from external contact circuit 1 (N.C.);
P08= 18: end defrost from external contact circuit 2 (N.C.);
P08= 19: condenser step 1 (N.O.);
P08= 20: condenser step 2 (N.O.);
P08= 21: condenser step 3 (N.O.);
P08= 22: condenser step 4 (N.O.);
P08= 23: remote ON/OFF;
P08= 24: compressor 1 failure;
P08= 25: compressor 2 failure;
P08= 26: compressor 3 failure;
P08= 27: compressor 4 failure.
- Select digital inputs ID2, ID6, ID7, ID10, ID5
P09, P10, P11, P12, P34:
Confi guration of digital inputs ID2, ID6, ID7, ID10, and ID5 respectively
(as per the table above for digital input ID1).
Note:
Cooling/heating (9, 10) cannot be set on P10, P11, P12, and P14.
- Select input B4 if /04 = 1
P13:
If input B4 is used as ON/OFF (/04 = 1) the same options are valid as for P08.
- Select input B8 if /08 = 1
P14:
If input B8 is used as ON/OFF (/08 = 1) the same options are valid as for P08.
- Select low pressure alarm
P15:
Used to select whether the low pressure alarm is detected when the compressor is OFF
(P15=1) or alternatively only when the compressor is ON (P15=0, default).
When the compressor starts the alarm is in any case ignored for the time P03.
- High temperature/high system start-up temperature alarm delay
P16:
Represents the high temperature alarm threshold detected by probe B1; the diff erential is set at
2 °C and the alarm is reset automatically (the warning relay is activated, signal only, and the message
“Ht” is shown). When starting the system, this alarm is ignored for the time P17. If the system start-up
protection is enabled (see parameter P20) and the alarm is activated, the time P17 is ignored and the
alarm has no hysteresis.
*: the high and low pressure alarms are managed in the
same way both for the transducers and the pressure
switches (digital input); if the unit is in standby the count
(3 times in one hour) is reset.
note 1:
if P08 is set to 10, the change in state considers
the times d12 and d13, and respects the compressor
protection times, both from the digital input and the
keypad.
note 2:
if the digital input is used to switch the unit ON/
OFF or change the operating mode, these functions are
disabled on the keypad.
note 3:
ID5 for the condensing unit with reverse cycle
has the function of cooling/heating changeover
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