Technical data

Ichill 200CX EVO rev 1.1 14/11/2013
Pag. 50 of 151
Low pressure alarm (when the low pressure switch is used) is disabled for AL02 time after valve activation
(AL02=0 the alarm is disabled when the compressor is OFF).
When first compressor of the circuit is switched on, the solenoid valve is switched on 1 seconds before it.
CO36 = 2 Pump down enabled during the switching off and switching on (low pressure switch or
pump down switch)
Compressor switching off:
before turning off the last compressor, the solenoid valve is closed; the compressor works until the pressure
switch is activated or after a maximum time CO39; in this case an alarm is displayed (b1PH or b2PH) but the
machine continuous to work as normal.
If the alarm occurs more than AL21 times per hour, the Ichill generate a manual alarm.
Low pressure alarm (when the low pressure switch is used) is disabled for AL02 time after valve activation
(AL02=0 the alarm is disabled when the compressor is OFF).
Compressor switching on:
when first compressor of the circuit is switched on, the solenoid valve is switched on 1 seconds before it.
If the pump down pressure switch remains active, the compressors does not restart and after CO39 time a
pump-down alarm is displayed.
The parameter AL23 allows to choose if the pump down alarm (during the switching on) is automatic or
manual reset:
 AL23 =0 automatic reset; the compressor will rester when the pump down pressure switch is active
 AL23=1 manual reset; if the number of pump down alarm per hour is lower than AL22 the reset is
automatic, manual reset; if the number of pump down alarm per hour is higher than AL22 the reset is
manual
PAR. CO36 = 3 Pump down enabled during the switching off only in chiller mode (low pressure
switch or pump down switch)
The pump douwn procedure works as CO36=1 but only in chiller mode; in heat pump mode the solenoid
valve is activated when the first compressor is ON and de-activated when the last compressor is OFF.
PAR. CO36 = 4 Pump down enabled during the switching off and switching on inly in chiller mode
(low pressure switch or pump down switch)
The pump douwn procedure works as CO36=2 but only in chiller mode; in heat pump mode the solenoid
valve is activated when the first compressor is ON and de-activated when the last compressor is OFF.
PUMP DOWN with low pressure probe
CO36 = 1 Pump down enabled during the switching off (low pressure probe)
Before turning off the last compressor, the solenoid valve is closed; the compressor works until the pressure
falls below CO37 or after a maximum time CO39; in this case an alarm is displayed (b1PH or b2PH) but the
machine continuous to work as normal.
If the alarm occurs more than AL21 times per hour, the Ichill generate a manual alarm.
Low pressure alarm (when the low pressure switch is used) is disabled for AL02 time after valve activation
(AL02=0 the alarm is disabled when the compressor is OFF).
When the first compressor of the circuit is switched on, the solenoid valve is switched on 1 seconds before it.
CO35 = 2 Pump down enabled during the switching off and switching on (low pressure probe)
Before turning off the last compressor, the solenoid valve is closed; the compressor works until the pressure
falls below CO37 or after a maximum time CO39; in this case an alarm is displayed (b1PH or b2PH) but the
machine continuous to work as normal.
If the alarm occurs more than AL21 times per hour, the Ichill generate a manual alarm.
Low pressure alarm (when the low pressure switch is used) is disabled for AL02 time after valve activation
(AL02=0 the alarm is disabled when the compressor is OFF).
When the first compressor of the circuit is switched on, the solenoid valve is switched on 1 seconds before it
and the compressor is switched on if the pressure is higher than CO37 + CO38.
If the pressure remains lower than CO37 + CO38 the compressors does not restart and after CO39 time a
pump-down alarm is displayed.
The parameter AL23 allows to choose if the pump down alarm (during the switching on) is automatic or
manual reset:
 AL23 =0 automatic reset; the compressor will rester when the pump down pressure switch is active