York International DFAA, Инструкция пользователя, техническое обслуживание и руководство по эксплуатации

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107273-UUM-C-0306
12 Unitary Products Group
TABLE 6: Oil Burner Control Troubleshooting
PROCEDURE STATUS
CORRECTIVE ACTIONS
a
1. Check that limit switches are
closed and contacts are clean.
— —
2. Check for line voltage power at the
oil primary control. Voltage should
be 120 VAC
— —
3. Check indicator light with burner
off, no call for heat (no flame).
Indicator light is on.
Cad cell or controller is defective, sees external light or connections are shorted. Go
to step 4.
4. Shield cad cell from external light. Indicator light turns
off
• Eliminate external light source or permanently shield cad cell.
Indicator light stays
on.
• Replace cad cell with new cad cell and recheck.
• If indicator light does not turn off, remove cad cell lead wires from R7184 and
recheck.
• If indicator light turns off, replace cad cell bracket assembly. Refer to TRADE-
LINE ® Catalog for bracket part numbers.
• If indicator light does not turn off, replace controller.
5. On warm air systems, jumper ther-
mostat terminals (T to T) on
R7184. Burner starts. Trouble in thermostat or limit circuit. Check thermostat or limit wiring connections.
Burner does not start
• Disconnect line voltage power and open line switch.
• Check all wiring connections.
• Tighten any loose connections and recheck.
• If burner does not start, replace R7184.
Condition: Burner starts, then locks out on safety with indicator light flashing at 1/2 second on, 1/2 second off.
1. Check that limit switches are
closed and contacts are clean.
— —
2. Check for line voltage at the oil pri-
mary control. Voltage should be
120 VAC.
— —
3. Check indicator light with burner
off, no call for heat (no flame).
Indicator light is on.
Cad cell or controller is defective, sees external light or connections are shorted. Go
to step 4.
Indicator light is off. Go to step 5
4. Shield cad cell from external light. Indicator light turns
off
Eliminate external light source or permanently shield cad cell.
Indicator light stays
on
• Replace cad cell with new cad cell and recheck
• If indicator light does not turn off, remove cad cell lead wires from R7184 and
recheck.
• If indicator light turns off, replace cad cell bracket assembly. Refer to TRADE-
LINE ® Catalog for bracket part numbers.
• If indicator light does not turn off, replace controller.
5. On applications with “valve-on
delay”, verify that oil valve is
closed during the “valve-on delay”
period by opening view port and
verifying that no flame is present
during 15-second “valve-on
delay”.
Indicator light is on If flame is present, replace valve.
6. On warm air systems, jumper ther-
mostat terminals (T to T) on
R7184. Burner starts Trouble is in thermostat or limit circuit. Check thermostat or limit wiring connections.
Burner does not start
• Disconnect line voltage power and open line switch
• Check all wiring connections
• Tighten any loose connections and recheck
• If burner does not start, replace R7184.
Condition: Burner starts then locks out on safety with indicator light flashing at 1/2 second on, 1/2 second off.
7. Reset oil primary control by push-
ing in and releasing red reset but-
ton. Indicator light stops
flashing
Go to Step 8.
Indicator light contin-
ues to flash at 1/2
second on, 1/2 sec-
ond off
Verify that control is not in restricted mode. If not in restricted mode, replace R7184