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Premium Commercial Controls
ERV
114
SYSTEM MONITORING
12.9.2 Alarms
Two general alarms are available:
u
Serious Alarm: Located at Discrete Input 5, “Alarm_Out.val” indicates whether there is a
serious alarm that stops the unit.
u
Any Alarm: Located at Discrete Input 20, “Any_Alarm_Out.val” indicates whether there is any
alarm present.
To reset the User Reset type alarms, set Coil 0 (or 98) “AlarmMng.AlrmResByBMS” to true.
The program will set it back to false. You can view the status change through Discrete Input 2
“AlarmMng.AlrmRes.”
12.9.3 Temperature and Humidity Around the ERV
The following are available:
u
Input Register 0 “OA_Temp.Val”
u
Input Register 2 “OA_Hum.Val”
u
Input Register 4 “RA_Temp.Vall”
u
Input Register 6 “RA_Hum.Vall”
u
Input Register 8 “EA_Temp.Val”
u
Input Register 10 “SA_Temp.Vall”
EA
OA
RA
SA
CA
UNITSTATUS_BN: INPUT REGISTER 50
VALUE
STATUS
MEANING
1
Unit on
The unit is on and running.
2
Unit switched off due to
alarm
The unit is off by a serious alarm.
3
Unit switched off by BMS
The unit is off by command from the BMS.
4
Unit switched off by time
band
The unit is off by the scheduler.
5
Unit switched off by digital
input
The unit is off due to contacts across 17 and 18 open.
6
Unit switched off from the
local keypad
The unit is off by the setting on the menu screen.
8
Exhaust Fan Only Mode
The unit is in single fan mode with exhaust fan
running.
9
Supply Fan Only Mode
The unit is in single fan mode with supply fan running.
11
Cool Locked Out by BMS
A BMS command has the cooling locked out.
12
Heat Locked Out by BMS
A BMS command has the heating locked out.
13
Device Test
The system is in device test mode for more than an
hour.
14
Sens Ovrd Active
The system has a sensor overwritten for more than
24 hours.
15
Off by CO2 Level
Off by CO2 Level.
16
Frost Control On
Frost Control Mode Active.