Troubleshooting OIL GUN | Nordyne M1S, M1G, M1B, M1M manual

c.If no power to combustion blower then check wiring and control module; replace if neces- sary.

Circulation Air Blower Will Not Operate Even Though The Burner Does Operate a. Check thermostat “G” wiring.

b. Check wiring to motor.

c. Check for a defective motor.

TROUBLESHOOTING - OIL GUN

Honeywell R7184 oil gun control only. Burner does not start with a call for heat.

1.Check the electrical supply to the furnace.

2.Be sure the furnace door switch is in the on position.

3Check for line voltage at the oil primary control. The voltage should be 115 VAC.

4.Check indicator light with burner off, no call for heat (no flame).

a.If indicator light is on, the cad cell is seeing stray light or the cad cell or controller is defective.

b.If indicator light is off, go to step 5.

c.If flashing, refer below (a. Reset primary control).

5.Jumper T to T terminals on primary control.

a.If burner starts, check thermostat or limit wiring connections.

b.If burner does not start, turn off power. Check all wiring connections.

c.If burner does not start, replace R7184 control.

Burner starts, then locks out on safety with indicator light flashing at ½ second on, ½ second off.

a. Reset primary control.

To reset the control from lockout, the button needs only to be pressed and released. If it is in restricted mode, the button should be held in for 30 seconds (until the light flashes twice, or until the light stops flashing on earlier models).

Note: Restricted Mode: If the control locks out three times in a row without a complete heat cycle between attempts, the lockout becomes restricted mode.

1.If indicator light stops flashing and ignition remains off, primary control could be defective. If line voltage is present at the ignitor terminals, but there is no ignition, the ignitor is probably defective and needs to be replaced.

2.If indicator light stops flashing, burner

Led Flashes	Cad Cell Resistance in Ohms

1	0 - 400

2	400 - 800

3	800 - 1,600

4	>1600

Table 10. Cad Cell Resistance when

sensing flame

turns on, but control locks out again, check cad cell if cad cell is Okay, replace primary control.

3.If indicator light continues to flash at 1/2 second on, 1/2 second off, verify that control is not in restricted mode. If restricted mode, reset it. If not in re- stricted mode, replace R7184.

4.If indicator light stays off while the flame is on, check cad cell sighting for view of flame.

5.If burner locks out, check cad cell resistance. (See Table 10)

6.If burner keeps running, system is Okay.

7.If indicator light is off, check cad cell assembly after disconnecting line volt- age power.

b.Burner will not start, and indicator light is flashing at 2 second on, 2 second off. Hold the reset button down for 1-2 second. If indicator light continues to flash, wait for 60

-70 seconds. If it still continues to flash, replace the primary control.

c.To check cad cell resistance.

Press and release the button during the run mode. The light will flash to indicate the cad cell resistance. For proper burner operation, it is important that the cad cell resistance reaover 1600 Ohms. For cad cell resistance, see Table 10.

Figure 35. Periodic Cleaning

M1M, M1S, M1B, M1G specifications

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