SmartPlate EV Installation, Operation and Maintenance Manual
APPENDIX A
– MODBUS CONTROL AND COMMUNICATION
OMM-0147_C
• SP-102 • 3/2/2021 Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST Page
60
of
72
Alarm Descriptions:
•
Alarm 1
: Over temperature
– DHW Outlet temperature is above set Over Temp Alarm
temperature
•
Alarm 2
: Outlet temperature not meeting DHW setpoint (DHW Out<DHW STPT for 10
minutes)
•
Alarm 3
: Flow sensor communication loss
•
Alarm 4
: BW in temperature sensor communication loss
•
Alarm 5
: DHW out temperature sensor communication loss
•
Alarm 6
: DHW in temperature sensor communication loss
•
Alarm 7
: Boiler Water inlet temperature is less than DHW setpoint
•
Alarm 8
: Pressure sensor communication loss
A.4 Process & Diagnostic Alarms
The Process and Diagnostic Alarms that can appear in the Temperature Controller display are
listed in the following Tables.
PROCESS ALARMS
DISPLAY
DESCRIPTION
PVInput Sbreak
DHW out Sensor has been disconnected or is faulty
Mod 1.A SBrk
Flow Meter has been disconnected or is fault
MOD 3.A SBrk
BW In sensor has been disconnected or is faulty
Mod 4.A Sbrk
City Water In Sensor has been disconnected or is faulty
Mod 6.A Sbrk
Differential Pressure Sensor has been disconnected or is faulty
Comm Loss Pressure
Snsr
Differential Pressure Sensor has been disconnected or is faulty
Not Meeting Setpoint
Setpoint has not been reached over a period of 10 minutes.
Overtemperature
DHW out temperature has crossed a threshold set by the user
for 30 seconds
Boiler Temp Low
Boiler Temperature is below DHW setpoint
