5-2
■
Troubleshooting
If a problem occurs, remove the front cover of the controller. Determine the
operating state of the controller and type of trouble by checking the start check,
POWER and FLAME LED display states. The start check LED is located in the
center inside the cover, and the POWER and FLAME LEDs are located on the
front display.
❍
LED out
●
LED lit
* To check if the controller is operating correctly, apply a flame signal input to the controller by using
a flame simulator. Make sure that 2K relay is turned ON and the FLAME LED is lit.
The following table shows the required flame voltages:
●
How to connect the flame simulator
• 123514A/B flame simulator
Contact the terminal 5 lead wire to the probe end.
Contact the terminal 6 lead wire to the plug end.
• 121708 flame simulator
Contact the terminal 5 to the F lug.
Contact the terminal 6 to the G lug.
Handling Precautions
• Keep the check time short and remove the simulator promptly after
completion of the check.
• Do not touch the terminals F and G during operation or during the
check. Doing so might cause electric shock.
Chapter 5. MAINTENANCE & INSPECTION
FRS100C
Standard model:
2V min.
High sensitivity model:
3V min.
FRS100B
Standard model:
2V min.
POWER
Start check LED
FLAME
Results
Remedy (check items)
LED
LED
Before
The power is not ON.
Check panel power switch and
startup,
❍
❍
❍
wiring.
terminal 7
OFF
After startup,
The flame is being
terminal 7
●
●
●
detected. (normal
-
ON
operation)
The flame has not
Check flame detector, burner,
●
●
❍
been detected.
flame relay, valves, ignition
transformer and flame relay.
*
●
❍
●
False flame
Check burner flame, flame detector
and flame relay.
*
●
❍
❍
1K relay is not ON.
Check power supply at operation
input terminal (7). Check flame
relay.
*
