Orion System Dual Electronic Expansion Valve Module - Manual (Page 14)

Dual Electronic Expansion Valve Module
Technical Guide 14
Status V-A/B and V-A/B Alarm Screens
Status V-A & V-B Screens
Refer to the following map when navigating through the Status Valve
A Screens. From the STATUS V-A or STATUS V-B Screen, press
<ENTER> to scroll through the screens.
STATUS
V-A/B
V-A/B MODE
ON/OFF/FORCE
V-A/B POS
0 TO 100%
SUPRHEAT
XX.X
SUPRHEAT SP
O TO 25
COIL TMP
XX.X
CALC TMP
XX.X
SUC PRESS
XXX
V-A & V-B Alarm Screens
Refer to the following map when viewing Valve A and Valve B Alarm
Screens. These screens will display automatically when alarms are
present.
V-A/B
ALARMS
CURRENT SUPERHEAT CALCULATION
SUPERHEAT SETPOINT SETTING
0 to 25
COIL TEMPERATURE READING FROM
TEMPERATURE SENSOR INPUT
CALCULATED COIL TEMPERATURE
FROM SUCTION PRESSURE INPUT
SUCTION PRESSURE READING
FROM INPUT
VALVE A/B MODES: ON ,OFF, FORCE
ON: Valve is modulating to maintain Superheat.
OFF: System is off.
FORCE: Valve is set to a forced position.
VALVE POSITION
0 to 100 percent
ALARMS
The alarms are as follows:
NO V-A/B ALARMS: This will be shown if there are no current alarms.
LO SPRESS: This indicates a Low Suction Pressure Alarm condition
which is activated when the Suction Pressure drops below 70 PSIG for
longer than 10 seconds. The valve will modulate by 10% one time when
alarm occurs to try to increase the suction pressure. This alarm will dis-
able when Suction Pressure is above 70 PSIG.
HI SHEAT: This alarm will be activated when the Superheat reaches
25 degrees for longer than 60 seconds. This alarm will not affect valve
operation. This alarm will disable when the Superheat drops below 25
degrees.
LO SHEAT: This alarm will be activated when the Superheat is 0
degrees for longer than 60 seconds. This alarm will not affect valve
operation. This alarm will disable when the Superheat rises above 0 de-
grees