I&O Manual - ECCS Control System - Categories On Thermal ...

Section 6: Trouble Shooting Guide
PROBLEM
No boilers running
Temperature
OFF POINT.
POSSIBLE CAUSE
of water higher than the
Boilers in local mode and boiler water
temperature is above OFF POINT.
POSSIBLE REMEDY
Boilers will come on automatically when system
water temperature drops below ON POINT.
Switch to remote or wait for temperature to drop
below ON POINT.
B reaker in ECCS Panel in OFF or tripped. Turn on breaker in ECCS Panel.
Touch Screen is not lit
Power feeding ECCS Panel is OFF or
tripped.
Improper power supply to panel.
Power
to screen is not connected.
Improper power supply to screen.
Turn on breaker feeding ECCS Panel.
Check power voltage and correct as needed.
Panel requires 120VAC wired to 4 amp circuit
breaker inside panel.
Check wiring and correct as needed, 24VDC
Screen uses 24VDC from PLC. Check voltage
and correct if needed.
B ad touch screen.
Replace screen.
No data being
displayed on screen
and no communication
error or data on
screen is not updating
Modbus communication wires shorted
together on any temperature controller or
flame safeguard.
Check Modbus wires A & B on all controllers for
location where wires are touching each other
and separate.
P LC not in run mode.
Flip switch on front of PLC to run position.
P ower off to boiler.
Turn power on to boiler.
Alarm "Boiler #
Communication
Failure"
Alarm "Boiler # Main
Flame Failure"
Modbus wiring disconnected on boiler
showing alarm.
Shield on wire not grounded properly.
Baud rate setting on Fireye or Honeywell
controller is wrong.
Incorrect baud rate set on temperature
controller.
Modbus wiring A, B, C is not consistent
throughout boiler devices.
Boiler address not correct on flame
safeguard or temperature controller.
Boiler has faulted on a flame failure while
in run mode.
Connect Modbus wiring (3 wire shielded cable)
to terminals A, B, C on devices.
Shield should be grounded on one end of
daisy chain only (panel end). Shields at wire
junctions should be tied together.
Set baud rate to 19,200.
Configuration parameter check C113. Second
value from right shall be a 6. Adjust as needed.
Insure same wire is daisy chained to all A
terminals, B to B terminals, and C to C
terminals.
Check appendix for correct setting on Modbus
devices. See Section 4.
Check controller manual. Reset flame
safeguard controller.
Alarm "Boiler # Pilot
Flame Failure"
Alarm "Boiler #
Airflow Switch"
B oiler has faulted while lighting pilot. Refer to boiler manual troubleshooting guide.
F an did not energize.
Refer to boiler manual troubleshooting guide.
A ir flow switch set wrong or not working. Adjust or replace switch.
F an running too slow.
Check VFD to determine cause and correct.
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