5.
(1)
(2)
(3)
* CAUTION *
Pressing the reset button too hard causes failure or damage.
The Combustion/Alarm indicator LED blinks
only while a false flame signal is being issued
during the prepurge. However, when the false
flame signal stops, the
normal sequence starts.
When a false flame signal continues from the startup time
In addition, when the false flame signal
continues beyond the lockout timing, lockout
occurs.
The subsequent operation is as explained in
- 7 -
(Prepurge timing is counted from the start.)
The Combustion/Alarm indicator LED blinks.
When a false flame signal continues from the
startup time
Operation When a False Flame Signal Is Issued
When a false flame signal is issued during the
prepurge and stops within the prepurge timing
When a false flame signal is issued during prepurge and stops within the prepurge timing
The subsequent operation is as explained in
Ignition Failure in the above Item 3.
When a false flame signal continues even after the prepurge timing
When a false flame signal is issued during the
prepurge and the signal continues beyond the
prepurge timing
The Combustion/Alarm indicator LED blinks
as soon as a false flame signal is issued. Then
lockout occurs after the lockout timing.
If lockout occurs, failure of any part of the related system is
assumed. Perform inspection thoroughly and remove the cause.
Fig. D
Fig. E
Fig. F
Temperature controller ON
Lockout timing
Temperature controller continuously ON
Operation
Lockout
Lockout timing
Burner motor
Air pressure
switch
Ignition
transformer
Pilot valve
Main valve
Indicator LED
Alarm
False flame
signal
Time
Prepurge
Lockout timing
Lockout
Burner motor
Air pressure
switch
Ignition
transformer
Pilot valve
Main valve
Indicator LED
Alarm
False flame
signal
Time
Temperature controller ON
Prepurge
Flame response
Burner motor
Air pressure
switch
Ignition
transformer
Pilot valve
Main valve
Indicator LED
False flame
signal
Time
Go to normal
operation.
Refer to Fig. A.
