6
S E R V I C E
M A N U A L
L A S E R H E A T I N G S Y S T E M S
Description
Section 1
cycle, before turning back on. The circulation fan motor
will remain on during this time.
1-31 Reigniting Operation
Start to reignite (T1)
by
turning the operation switch ON
if the reigniting time becomes over 3 seconds after
turning the operation switch OFF during combustion.
(Include the unit OFF from the Save Mode and Timer
Operation Mode.) Also, the fan motor keeps operat
ing
in
this condition.
1-32 Error Codes History
To show the error codes history, first turn the unit off (if
not already in off), then push the “DOWN” and “UP”
button at the same time for 3 seconds, and a buzzer will
sound. To get out of the error codes history, press the
“DOWN” and “UP” button again at the same time for 3
seconds. This will indicate the past 9 error codes. The
error codes are indicated as “XE YY”. (X stands for 1~9
with 1 being the most recent. Error codes more then 9
codes ago will be deleted. YY stands for the error code
or Altitude Setting – see High Altitude Setting Mode.)
If you press the “DOWN” button, the display shows
“AL YY”
➞
”9E YY”
➞
····
➞
”1E YY”
➞
”AL YY”
➞
····
If you press the “UP” button, the display shows
“AL YY”
➞
”1E YY”
➞
····
➞
”9E YY”
➞
”AL YY”
➞
”1E
YY”
➞
····
When the unit is turned ON during Error Codes History,
the unit exits the Error Code History and starts normal
operation.
1-33 Igniting Failure Error Lock
If the igniting fault error “E-2” occurrs 3 times in a row,
then the display will show “E-22”, and it is not able to
reset by the power button but it can be reset by
unpluging the power cord for at least 30 minutes.
1-34 Burner Thermistor Normal Detecting
Temperatures
L300 / L530 : above 120°C or 248 F normal
L560 / L730 : above 100°C or 212 F normal
1-35 Power Failure Recovery System
The error codes, weekly timer setting, ˚C/˚F setting,
Power Saver operation, and fuel pump flow setting are
stored in the involatile memory, and will not be erased
d
ue
to power failure. The time, however, is stor
ed
by the
capacitor, and will only last for so long. This could be 30
minutes or longer.
1-36 Backup Life
Back up time is more than 30 minutes(reference value)
The life guarantee is more than 10 years.
1-37 Deleting The Error Code History
To clear the error code history press the “AUTO” switch
for 3 seconds while in the Error Codes History. The
display will show “Er CL”, which will flash 3 times, and
then switch to time display.
1-38 Detection of Abnormal Electrical
Frequency Condition
When the electrical frequency of the power supplied to
the unit is abnormal and the power button is ON the unit
will display an error code of “E-0” and the unit will not
start. To reset
,
turn the power button OFF and then
back ON.
The judging range for the frequenc
y
is 55Hz
<=
or
<65Hz. Normal frequenc
y
is 60Hz.
1-39 Power Button Malfunction
If there is a problem with the power button the unit will
make a long buzzer beep sound (by 100msec. interval.),
which will indicate that a short circuit has occurred.
If the power button short circuit condition occurs for
more than 30 seconds, then the following happens:
• Flash all on display
• Flash the power LED
• Make a beep sound
• All buttons are invalid. No beep sound by pressing
buttons.
To cancel
beeping noise tur
n the power
button
OFF.
1-40 Low Voltage Detection
The unit will turn OFF with “E-0” when the low voltage
condition keeps for more than 10 seconds +/- 2
seconds.
1-41 Forced Flame Detection
If the flame is detected when the power button is turned
