Troubleshooting 99
Fault
Possible Causes
Check method
Flame Rod (Electrode)
Replace the electrode or clean the fire detecting electrode.
●
Cause: Due to the properties of the electrode, the oxide film is created due to
long-term exposure to the high temperature; therefore, errors may be caused in
detecting the fires.
●
Check-up: Use sandpaper to clean the fire detecting electrode covered with oxide
film or replace it.
Flame loss and noise
occurs after ignition
PCB DIP switch setting
error
Check the PCB DIP switch settings.(Refer to page 18)
1 2 3 4 5 6 7 8
9 10
1 2
ON
ON
2
ON
NG
LP
2
ON
Offset pressure
adjustment error
Low fire (1-stage Min) offset adjustment error
●
Use the Front Panel to set the unit at "MIN.1" (refer to page 18).
●
Open the offset pressure port on the gas valve and connect a manometer. Use
the positive pressure side on a dual port manometer.
●
Adjust the offset pressure by turning the adjustment screw on the gas valve with
a 5/32" or 4mm Allen wrench, if the pressure value is out of range.