21
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With current ED510’s (Engineering code 3 or higher), the LED display backlight remains ON at all
times. With earlier ED510 versions, the backlight will be lit when the L1-13 (operating control) cir-
cuit is closed, and OFF when the L1-13 circuit is open. With the earlier displays, depressing any key
will light the display for three (3) minutes.
03'/3987
When a safety shutdown occurs, the control will display a message indicating LOCKOUT and the
reason for the lockout. The alarm circuit (Terminal “A”) will be energized. The non-volatile memory
will remember the status of the control even if a power failure occurs. By depressing the reset button
on the display, the control can be reset. The button must be held down for one second and then
released. Very little force is required to do this. Do not press hard.
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1.
If the running interlock circuit does not close, the control will lockout and the blower motor will
be de-energized. If the interlock circuit opens during a start-up or firing period, all fuel valves
will be de-energized and the control will lockout.
2.
If the proven high fire circuit (D-8) has not closed after a ten (10) minute “Hold” period at the
start of prepurge, the control will lockout.
3.
If the low fire start circuit (M-D) has not closed after a ten (10) minute “Hold” period at the end
of prepurge, the control will lockout.
4.
If dipswitch 6 is in the “Up” position (3-P prove open to start-enabled), and the 3-P circuit is
closed at the start of the operating cycle, the control will hold for one (1) minute waiting for the
3-P circuit to open. If, after one (1) minute, the 3-P circuit does not open, the control will lock-
out.
5.
If dipswitch 6 is in the “Up” position (D-8 prove open to start enabled), and the D-8 circuit is
closed at the start of the purge period, the control will hold for ten (10) seconds waiting for the
D-8 circuit to open. If, after ten (10) seconds, the D-8 circuit does not open, the control will
lockout.
6.
If dipswitch 6 is in the “Up” position (M-D prove open to start enabled), and the M-D circuit is
closed at the end of high-fire purge period, the control will hold for ten (10) seconds waiting for
the M-D circuit to open. If, after ten (10) seconds, the M-D circuit does not open, the control
will lockout.
7.
If pilot flame is not detected during the 10 second trial for ignition period, the pilot valve and
ignition transformer will be de-energized and the control will lockout on safety.
8.
If main flame is not detected at the end of the main flame trial for ignition period, all fuel valves
will be de-energized and the control will lockout on safety.
9.
If the main flame fails during a firing cycle, all fuel valves will be de-energized within 4 sec-
onds after loss of flame signal, (2 seconds with programmers EP165, EP166) and the control
will lockout on safety.
10.
The EP165 and EP166 programmers will lockout on a power interruption.
11.
If flame is detected when the operating control (L1-13) is open, the control will wait sixty (60)
seconds and then lockout if flame is still present. If the operating control closes and flame is
detected during purge, the blower motor (term M) remains energized and the purge sequence is
put on hold. If the flame signal goes away within sixty (60) seconds, the control will proceed
with a normal start-up. If flame signal is still present after sixty (60) seconds, the control will
lockout.
NOTE:
Manual Reset is required following any safety shutdown.
NOTE:
Depressing and releasing the reset button during a cycle will cause the control to shut the
burner down and recycle.
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Refer to bulletins ED-5101 or E-1101 for a complete list of all ED510 display messages.
