Thermal Solutions EVS SERIES Installation, Operating And Service Instructions page 54

B.
TROUBLESHOOTING GUIDE
Alarm Messages (continued)
LCD Display Recommended
Alarm Message
Check Wiring and
Remote Input Fail Remote System
Confirm each boiler has
a unique address
Comm Failure
Check Wiring and
Remote System
Check return water
temperature. Consider
system or operational
changes to avoid low
Low Inlet Temp
temperature events
Check wiring and
Call Factory Reset
all memories in
Memory Failure Clr Run Time Cnt
Factory Defaults
Password is required)
Action
Remote Control Input Fail
The Remote Control Input is configured and is not connected or is above or be-
low a valid range. When the remote control input fails, the following control mode
changes are taken automatically:
Selected Modes
Remote Mod
Remote Mod & Remote Sensor
Remote SP
Remote SP & Remote Sensor
Communication Failure
The Modbus or Peer-To-Peer network has failed. When the Modbus network fails
the following control mode changes are taken automatically:
Selected Modes
Modbus Mod
Modbus Mod & Remote Sensor
Modbus SP
Modbus SP & Remote Sensor
After a Modus communication failure, the 'Comm Failure' alarm is not cleared
until communication is restored and successfully writes to both the Remote On
/ Off Modbus Command (00004) and Remote Firing Rate or Remote Setpoint
(40006) points have been completed, power is cycled or the protocol parameter is
changed to Peer-To-Peer and then back to Modbus.
When a Peer-To-Peer network has failed the boilers begin operation as stand
alone boilers using the selected parameters.
After a Peer-To-Peer communication failure the 'Comm Failure' alarm is not
cleared until communication is restored and the boiler rejoins a network with at
least one other boiler, power is cycled or the protocol parameter is changed to
Modbus and then back to Peer-To-Peer.
Low Boiler Inlet Temperature
If the boiler inlet temperature is below the low boiler inlet temperature setpoint,
the "Low Inlet Temp" Message is displayed and the boiler inlet temperature
history is stored.
sensor
Memory Failure
New software has been installed in the Thermal Solutions Boiler Control (TSBC)
System menu: or a power interruption has caused a memory failure. The Call For Heat will be
Clr BIT History prevented until the condition is cleared.
Clr Alarm Hist
Clr Cycle Cnt
(Factory Level
Explanation
54
Resulting Control Mode
Outlet Sensor and Local Setpoint
Remote Sensor and Local Setpoint
Outlet Sensor and Local Setpoint
Remote Sensor and Local Setpoint
Resulting Control Mode
Outlet Sensor and Local Setpoint
Remote Sensor and Local Setpoint
Outlet Sensor and Local Setpoint
Remote Sensor and Local Setpoint