U.S. Boiler Company LE Series, Инструкция по установке, эксплуатации и обслуживанию, Страница: 43 / 60

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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 12
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 12: TROUBLESHOOTING GUIDE