15
CV072018-1
Tw (water low)
ok
It is present only if the air after-treatment management is configured with wa-
ter coil (Factory menu).
The temperature of the water leaving the coil is higher than a safety threshold;
there is no risk of freezing the water in the coil.
ko
Risk of freezing the liquid in the water coil.
It is present only if the filter status alarm is configured with differential pressure
switch or depending on the hours of operation of the machine (Factory menu).
Filters
ok
Clean filters.
ko
It is only present if the fan status alarm is configured with differential pressure
switches, with tachometer signal from the fans or with DO of the fans (Factory
menu).
Fans/
ok
Fans OK.
ko
Possible failure in a fan. It is only present if the automatic speed management of
the fans with CO2 or CO2 sensor is configured -VOC2 (Installer menu).
CO
2
VOC
ok
Probe OK.
ko
Possible failure of the probe or the connection.
It is only present if the automatic speed management of the fans with relative
humidity sensor (Installer menu) is configured.
RH senso
ok
Probe OK.
ko
Possible failure of the probe or the connection.
It is only present if the fan speed management is configured with analog 0-10V
external signal (Installer menu).
Ext.signal
ok
External signal source works correctly.
ko
External signal not present (voltage at terminals equal to 0V):
1) check the electrical connections of the external source (see electrical diagrams).
2) if the problem persists, check the presence of the external signal (tester) with
values higher than 0V.
3) If the problem persists, replace the electronic card. It is only present if the
machine is in a constant flow version with control over the two flows.
FlowSupply
ok
The pres sensor of drive works correctly.
ko
Possible anomaly in the pres sensor of drive.
FlowExhaust
ok
It is only present if the machine is in a constant flow version with control over
the two flows.
ko
The pres sensor return function works correctly Possible anomaly in the pres.
sensor return.
Flow
ok
It is present only if the machine is in a constant flow version with control over
a flow.
ko
The pressure sensor works correctly Possible anomaly in the pressure sensor.
DpSupply
ok
It is present only if the machine is in a constant pressure version with control
over the two flows.
ko
The pres. sensor of impulsion works correctly Possible anomaly in the pres. sen-
sor of drive.
DpExhaust
ok
It is only present if the machine is in a constant flow version with control over
the two flows.
ko
The pres. sensor return function works correctly Possible anomaly in the pres.
sensor return.
Dp
ok
It is present only if the machine is in a constant pressure version with control
over a flow.
ko
The pressure sensor works correctly . Possible anomaly in the pressure sensor.
