35
16. ELECtRoNIC EXPANSIoN VALVE
the electronic expansion valve is controlled by a stepper motor connected directly to the main control Pcb. the
eeV changes position depending on compressor superheat measured by the lP pressure transducer and the cst
compressor suction temperature.
the eeV position and superheat value can be seen in the i-o menu.
the minimum eeV position is 0 and maximum is 480.
When the outdoor air temperature is high the eeV can be almost fully open. this is normal operation and is due
to a lack of subcooling.
CONSULTATION
+
}
VALUE
SH
VALUE
pos
+
EEV
+
I-0
+
LWT / OFF
17. ALARM oPERAtIoN MoDE
When some alarms occur the
Aqu@ Scop Advance DCI
will be able to operate in a reduced mode to provide
some heating until repair is possible. in some cases this reduced mode will reduce the heating capacity and increase
the use of back up heating and therefore increase power consumption.
17.1. EWt ALARM
the value of eWt is replaced by lWt -5.
17.2. oAt oR CDt ALARM
the compressor maximum speed is reduced to 65hz
17.3. oCt ALARM
the compressor will still operate only if the oat > 5°c and lP > 5 bars.
17.3.1. EMERGENCY HEAt SWItCH
the emergency heat switch is placed next to the display
behind the transparent window.
the switch is used to manually change the priority heating
from the compressor to the additional heat.
When in emergency heat mode the room temperature is likely to be less stable and
electricity consumption is likely to increase.
