45
B.
OIL PRIMARy CONTROL
(Oil Primary)
1. Burner (Oil Primary) will not come on.
a. No power to Oil Primary.
b. Oil Primary is in lockout or restricted mode.
Press reset button for one (1) second to exit
lockout. If control has recycled three times
within the same call for heat, it will enter into
restricted mode. To reset from restricted mode,
refer to Section VIII, Paragraph I, Step 2 for
details.
c. CAD cell seeing light.
d. CAD assembly defective.
e. Control motor relay is stuck closed (see note
below).
2. Burner (control) will light, then shut down after a
short time, then restart after one (1) minute.
a. CAD cell is defective.
b. Air leaking into oil line causing flame out.
c. Defective nozzle causing flame to be erratic.
d. Excessive airflow or draft causing flame to leave
burner head.
e. Excessive back pressure causing flame to be
erratic.
3. Control locks out after Trial For Ignition (TFI).
a. No oil to burner.
b. Shorted electrodes.
c. Nozzle clogged.
d. Airflow too high.
e. Ignitor module defective.
XII. TROUBLESHOOTING (continued)
f. CAD cell defective.
g. Oil valve stuck open or closed.
Note
: The Safety Monitoring Circuit (SMC) is
designed to provide lockout in the event of a
stuck or welded motor relay.
NOTICE
If flame is not established within 15 seconds of
oil valve actuation (known as Trial For Ignition
[TFI]) lockout will occur. Lockout is indicated
by a red LED solid-on located on the oil primary
control.
Hard Lockout will occur if the Oil Primary
Control locks-out three (3) times during a call
for heat. This is indicated by red light reset
button solid-on.
C.
INTELLIGENT OIL BOILER CONTROL
• Cold Start Boiler Control
is used on Boilers without
Tankless Heaters.
1. When a problem occurs with the boiler operation,
the Boiler Control easily provides specific, valuable
information to help resolve the issue quickly. The
display on the Boiler Control should be the first
place to check.
a. If an Error Code “
Err
”
IS NOT
displayed on the
Boiler Control: In this circumstance, Table 13
can be used to determine the problem and
possible causes.
System Condition
Diagnostic Condition
Check
Action
Boiler is cold, house is
cold.
Display is OFF.
120 Vac System power.
Turn system power on.
Display is ON.
24 Vac T-T
No 24 V; replace control.
24 V present; disconnect
thermostat, short T-T.
Boiler starts, check wiring and thermostat.
120 Vac at B1-B2
• If no, replace control.
• If yes, check burner and wiring.
Refer to
Err
on display.
-----
Boiler is hot, house is
cold.
Display is ON.
120 Vac at C1-C2
• 120 Vac at C1-C2, check wiring to
pump.
• Wiring OK, is pump running?
• If not, replace the pump.
• If pump is running, check for trapped air
or closed zone valves
TABLE 13: TROUBLESHOOTING GUIDE
Summary of Contents for LE DV Series
Page 5: ...5 I General Information Figure 1A LEDV Packaged Water Boiler with Beckett AFII Burner ...
Page 6: ...6 I General Information continued Figure 1B LEDV Packaged Water Boiler with Riello BF Burner ...
Page 19: ...19 v venting continued Figure 11 Vent Installation Figure 12 Vent Connector Un Assembled ...
Page 20: ...20 v venting continued Figure 13 Vent Connector Assembled Figure 14 Air Intake Installation ...
Page 48: ...48 xiii Repair Parts continued Figure 29 LEDV Bare Boiler Assembly ...
Page 50: ...50 xiii Repair Parts continued Figure 30 LEDV Boiler Jacket Insulation ...
Page 55: ...55 xiii Repair Parts continued Figure 33 Vent Kit Repair Parts ...
Page 60: ...60 U S Boiler Company Inc P O Box 3020 Lancaster PA 17604 1 888 432 8887 www usboiler net ...
