Boiler Parameter Worksheet
Appendix
39
2.0
TROUBLESHOOTING
2.0.1
Troubleshooting Table
Symptoms:
Possible Cause:
Solution:
No Display, No Operation
Loss of Power
Restore Power. The control retains any error/lockout
code and may require a reset.
No Display, No Operation
Fuse on Main Board is
Blown
Replace fuse
Boiler runs with some
operation compromised,
such as no remote input,
alarm output, flame
detected output, cascade,
MODBUS
®
, etc.
1) Fuse on Interface Board
is Blown
2) Boilers were wired A to
B during cascade set-up
AND more than one master
switch was set to
MASTER.
1) Replace fuse on interface board.
2) Replace the interface board.
No Display, Boiler is
Operating
1) Display is not wired
properly
2) Light source is not
functioning
3) S4 switch is in the off
position
1) Check the display wires. (twisted pair)
2) Use a flashlight to verify that text is present.
Replace display board.
3) Turn S4 switch to the on position, which is on the
main board
Display continuously shows
CONNECT INIT
Incorrect communication
between control boards
Check communication wiring. (twisted pair)
Verify that all three control boards (Main, Interface, and
Display) have the same software version.
Time & Date are incorrect
Battery in display is bad
Install replacement Battery CR2032
2.0.1
The Loss of Power
In the event of a power failure (or when the On/Off switch is in the Off position), the display panel is not illuminated
and the entire system is de-energized, closing all automatic valves and halting all boiler operations. When power is
restored the sequence of operation will resume. If any error/lockout is present when the power is lost, the control will
retain that error/lockout and display the error/lockout when the power is restored. A manual reset may be required.
WARNING
If any boiler “Manual Reset” limit device trips,
DO NOT
Reset the control without determining and correcting the cause.
