Technical information

91
Operating Instructions
µC3 Control, YLCA/YLHA 100, 120 and 150
This is a specially programmed controller for air-water chill-
ers and heat pumps with four capacity stages. These are
divided into two independent cooling circuits equipped with
two tandems that act upon a common water circuit. Both sys-
tems are equipped with two fans each, the speed of which is
controlled by pressure sensors. This control operates through
the following intakes and outlets.
Digital inputs
Digital outputs
Analogical inputs
Analogical outputs
ID1 - J1/8 General protection (PG)
ID2 - J1/1 Flow switch (FS)
ID3 - J1/9 Remote ON/OFF (ROO)
ID4 - J1/2 ID5 -J1/10
ID5 - J1/10 Low pressure switch circuit 1 (LP1)
ID6 - J4/8 High pressure switch circuit 1 (HP1)
ID7 - J4/1 Thermal protector compressor 1 (THPC1)
ID8 - J4/9 Thermal protector compressor 2 (THPC2)
ID9 - J4/2 Thermal protector circuit 1 fans (THPF 1-2)
ID10 - J4/10 Low pressure switch circuit 2 (LP2)
ID11 - J7/6 High pressure switch circuit 2 (HP2)
ID12 - J7/1 Thermal protector compressor 3 (THPC3)
ID13 - J7/8 Thermal protector compressor 4 (THPC 4)
ID14 - J7/3 Thermal protector circuit 2 fans (THPF 3-4)
ID15 - J7/9 Remote COOL/HEAT (RCH)
ID18 - J7/5 Pump 2 protector (Q6)
N01/C1-2 Compressor 1 circuit 1 (K1)
N02/C1-2 Compressor 2 circuit 1 (K2)
N05/C5 Pump 1
N06/C6-7 Compressor 3 circuit 2 (K3)
N07/C6-7 Compressor 4 circuit 2 (K4)
N08/C8-9 Pump 2
N010/C10 Alarm
N011/C11-12 Antifreeze heater circuit 1-2
N012/C11-12 Backup heater
N013/C13-14 4-way valve circuit 1 (V4V1)
N014/C13-14 4-way valve circuit 2 (V4V2)
Y3 Fan speed control, circuit 1 (PWM)
Y4 Fan speed control, circuit 2 (PWM)
B3 - J2 Coil pressure, circuit 1
B4 - J3 Coil pressure, circuit 2
B5 - J4/13 Water temperature at exchanger intake
B6 - J4/12 Water temperature at exchanger outlet