1. General maintenance and inspection
(1) When replacing RCF15, perform all inspections and adjustments specified in this instruction manual.
(2) Never lubricate any part of RCF15.
(3) Remove combustion products from the flame rod, the burner, etc.
2. Maintenance and inspection intervals
Rough guidelines are as follows.
(1) Clean the flame rod and the burner at least once a year.
(2) Check the flame cutoff action of the burner at least once a month.
(3) Check the flame current at least once a month.
3. Inspection in case of trouble
When trouble occurs, investigate the cause with the following procedure.
(1) Turn the power switch off.
(2) Press the reset button of the burner controller to reset the system.
(3)
(4)
(5)
Next, go to step (7).
(6) If the burner motor does not start, check if a voltage is applied between the terminals
⑩
and
⑦
.
1)
2) If the voltage is not applied, check the temperature controller.
(7) Check if the air pressure switch operates normally.
1) If the switch operates normally, the ignition action will start after the prepurge.
2)
(8)
1)
2) If the voltage is not applied, the RCF15 main body is defective. Please replace it.
(9) Flame detector function test
When the pilot burner ignites, check that the flame current is 2μA or more.
(10) Check of sequence operation
1) If the voltage is applied, check the wiring between the main valve and the terminals
①
,
⑦
.
2) If the voltage is not applied, the RCF15 main body is defective. Please replace it.
(11) When the pilot burner ignites, check if the ignition action of the ignition transformer stops.
If it does not stop, check the wiring between the ignition transformer and the terminals
⑨
,
⑦
.
(12) When a false flame signal is issued at the startup time
1) Check the flame rod. If the flame rod is normal, the RCF15 main body is defective. Please replace it.
2) If the flame rod is defective, replace it with a non-defective one.
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When the pilot burner ignites, check the main valve operation. If the main valve does not become ON,
check if a voltage is applied between the terminals
①
and
⑦
.
If the wiring is correct but the ignition action does not stop, the RCF15 main body is defective. Please
replace it.
When the temperature controller is turned on, the burner motor starts and the Combustion/Alarm
indicator LED blinks. After approx. 15 seconds, lockout occurs and an alarm is issued.
Perform setting so that the temperature controller is turned on. When the controller is turned on, a
voltage is applied between the terminals
⑩
and
⑦
, and the burner motor starts.
If the voltage is zero, check the temperature controller contact, fuse, power switch, power supply, etc.
In this case, identify the cause of the false flame, and be sure to remove the cause. If there is no trace of
the false flame,
If the pilot burner does not ignite, check if a voltage is applied between the terminals
⑤
and
⑦
, and
between the terminals
⑨
and
⑦
.
If the voltage is applied, check the wiring between the pilot valve and the terminals
⑤
,
⑦
, and the
wiring between the ignition transformer and the terminals
⑨
,
⑦
.
If the voltage is applied, check the burner motor and the wiring between the burner motor and the
terminals
⑩
,
⑦
.
If the switch does not operate, adjust the switch to turn it on.
If the switch is not turned on, it is defective. Please replace it.
Determine the maintenance and inspection intervals in consideration of factors such as the type of equipment,
ambient conditions of the installed area, frequency of use.
Turn the power switch on. Check if the applied voltage between the terminals
②
,
⑩
, and
⑦
is within
the specified value when the temperature controller is ON.
Maintenance and Inspection
5
