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OFFSET DIP 1 DIP 2 DIP 3 DIP 4
0 off off off off
16 off off off ON
32 off off ON off
48 off off ON ON
64 off ON off off
80 off ON off ON
96 off ON ON off
112 off ON ON ON
128 ON off off off
144 ON off off off
160 ON off ON off
Led Flashing On
Comp. (left) Comp. 1 in demand (Temp.) Comp. 1 activated
Comp. (right) Comp. 2 in demand (Temp.) Comp. 2 activated
Cool Operating in COOL
Heat Operating in HEAT
x 100 Value x 100
mute
µ
chiller
comp
x 100
clear
SEL
PRG
Unit addressing
Unit addressing within the network can be selected by means
of the value given to parameter HA and the dip-switch sys-
tem configuration included in serial board RS485. Effective
addressing is obtained by adding the offset value taken from
the following table to HA.
For example, if the HA value is 12 and dip-switch 1 is set to
ON, the address obtained will be 12 + 128 = 140.
Unit control
Display
The display always shows, by default, the return water tem-
perature detected by probe B1. This comprises three figures
with automatic viewing of a decimal point between -19.9 and
+19.9° C. Beyond this range, the displayed value will always
comprise two figures. E.g. 21° C. Nevertheless, the regulator
in the internal program always operates based on tenths of a
degree.
Unit status
Unit status information is indicated by 5 LEDs located on the
terminal display, and 2 LEDs (yellow and green) on the base
plate.
operating mode, monitor its status and set operating param-
eters. There are more keys available on the remote terminal
version for working ease. Key functions and their variants,
when pressed two at a time, are detailed below.
Activation/deactivation of “COOL” function
The COOL function can be activated and deactivated by
pressing the COOL key for over 5 seconds. It is impossible to
go directly from the HEAT to the COOL mode without previ-
ously deactivating the HEAT function.
Activation/deactivation of “HEAT” function
The HEAT function can be activated and deactivated by press-
ing the HEAT key for over 5 seconds. It is impossible to go
directly from the COOL to the HEAT mode without previously
deactivating the COOL function.
Access to “DIRECT” parameters
The DIRECT parameters are accessible to the user and are
related to set points and their differentials, to entering and
discharge water temperature of the exchanger, to the refrig-
erant temperature in the coil and to the compressor and pump
operating hours counters. Pressing the SEL key for over 5
seconds displays the code of the first parameter, which is the
cool cycle set point. Pressing the and keys moves you
through all DIRECT codes available. Pressing SEL once again
displays the parameter value of the pre-selected code, which
can be changed with the and keys. Pressing the PRG
key memorizes the new values and exits the procedure. If for
over 10 seconds no modification is made, the display begins
to flash. If no other key is pressed in 60 seconds, the unit will
go back to normal status without changing any parameter.
Access to “USER” parameters
The USER parameters are those used by the unit to operate
accordingly. These are protected by a password to avoid ac-
cess to unauthorized personnel. Pressing the PRG key for
over 5 seconds displays 00 flashing. Enter the password (au-
thorized personnel) and press SEL. Pressing the and
keys moves you through all USER parameters available.
Pressing SEL once again displays the parameter value of the
Description Factory value
r1 COOL set point 12°C
r2 COOL cycle differential 3°K
r3 HEAT set point 40°K
r4 HEAT cycle differential 3°K
r6 Water discharge temp. exchanger 1 Readout °C
r7 Water discharge temp. exchanger 2 Readout °C
r8 Refrigerant temp. coil 1 Readout °C
r9 Refrigerant temp. coil 2 Readout °C
c9 Operating hours compressor 1 Readout hours x 100
cA Operating hours compressor 2 Readout hours x 100
cC Operating hours water pump Readout hours x 100
"DIRECT"
parameter
Keyboard
The terminal keyboard is comprised of four keys: PRG/mute,
SEL, /HEAT and /COOL. These keys allow selecting unit