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3.6 MAIN MONITOR - ELECTRONIC VALVE PAGE (NOT
AVAILABLE FOR TW110)
1. They indicate the current values of the following parameters:
Mode = indicates the current status of the electronic valve, this status can be:
— Off: valve off;
— On: valve operating;
— Start: valve in start-up mode;
— Alarm: valve in alarm;
— Forced: valve in forced operation (compressor start-up);
— Forced manual: valve in forced manual operation (support);
— Forced at zero: valve in forced operation at zero (leak detection alarm);
Liquid level = level of liquid inside the attached heat exchanger;
Current setpoint = Indicates the percentage value of the liquid level to be reached
for flooded exchangers;
EEV A current position = opening percentage of valve A;
EEV A current steps = opening of valve A expressed in steps
Digital input 1 = status of digital input ID1 on the electronic driver of the valve;
Digital input 2 = status of digital input ID2 on the electronic driver of the valve;
Relay = relay status on the electronic driver of the valve (green = On; grey = Off);
1. They indicate, only visible on units with at least 3 compressors, the current val-
ues of the following parameters:
EEV B current position = opening percentage of valve B;
EEV B current steps = opening of valve A expressed in steps;
3.7 MAIN MONITOR - EVAPORATOR PAGE
1. They indicate the current values of the following parameters:
Evap.water inlet = indicates the temperature of the evaporator water inlet;
Evap.water outlet = indicates the temperature of the evaporator water outlet;
Mode = indicates the current status of the evaporator and any preventions of the
machine, this status can be:
— Off: heat exchanger not active;
— On: heat exchanger active;
— High pressure prevention: heat exchanger in prevention mode for high con-
densation pressure;
— Low pressure prevention: heat exchanger in prevention mode for low evap-
oration pressure;
— Low temperature prevention: heat exchanger in prevention mode for low
evaporator temperature;
Pul. pump 1 / Pul. pump 2 = indicates the current status of the pumps to the evap-
orator (based on the unit they can be one or two), this status can be:
— Off: pump not active;
— On: pump active;
— Switch-off: pump in switch-off stage;
— Flow switch: flow switch alarm;
— Pump inversion: change between pump 1 and pump 2 in progress;
— Alarm: pump in alarm;
— Force On: pump forced in on mode;
— Not present: pump not present;
2. They indicate the current values of the following parameters:
Current setpoint = It indicates the value of the setpoint currently set
Current differential = It indicates the value of the differential applied to the set-
point;
Proportional error = It indicates the percentage value relative to the proportional
error of the PID logic;
Integral error = It indicates the percentage value relative to the integral error of
the PID logic;
Total request = It indicates the percentage value of the thermostat request;
Maximum request limit = level of potential power limitation of the thermostat;
3.8 MAIN MONITOR - CONDENSER PAGE
1. They indicate the current values of the following parameters:
Mode = indicates the current status of the condenser, this can be:
— Off: heat exchanger not active (fan/pump);
— On: heat exchanger active (fan/pump);
— Start: fixed speed for compressors start-up (fan/pump);
— Alarm: condenser in alarm;
— Forced: fan/pump in forced operation (support);
Condens. pressure. = indicates the condensation pressure value;
Current setpoint = It indicates the value of the condensation pressure setpoint set
Current differential = It indicates the value of condensation pressure setpoint
differential;
Current speed = Indicates current speed of the modulating pump (adjusted based
on the 0-10 signal of the analog output Y1) or of the fan;
2. The subcooler is physically present on the WTX and TBX machines. The VSL and
VSBP valves are only present and visible on TBX machines.
In the graphical diagram of the subcooler, the various elements indicate:
Top value = Indicates the condenser outlet liquid temperature;
Bottom value = Indicates the low pressure value converted to temperature;
Liquid valve on the condenser outlet (top) = Indicates the status of the valve
connected to the digital output NO17 ;
Bypass valve between inlet and outlet = Indicates the status of the valve con-
nected to the NO16 digital output (green = On; grey = Off);
3. They indicate the current values of the following parameters (only visible for
water/water units):
Cond.water inlet = indicates the temperature at condenser inlet;
Cond.water outlet = indicates the temperature at condenser outlet;
The following parameters are only visible for units in heating mode:
— Cond.water outlet = indicates the temperature at condenser outlet;
— Current differential = It indicates the value of the differential applied to the
setpoint;
— Proportional error = It indicates the percentage value relative to the propor-
tional error of the PID logic;
— Integral error = It indicates the percentage value relative to the integral error
of the PID logic;
— Total request = It indicates the percentage value of the thermostat request;
— Maximum request limit = level of potential power limitation of the thermo-
stat;
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