Field Controls MPL-B, WML-C manual Table C-3 R7184 Troubleshooting, Corrective Action

Page 27

Table C-3: R7184 TROUBLESHOOTING

Condition: Burner motor does not start when there is a call for heat.

Procedure

Status

Corrective Action

1. Check that limit switches are

N/A

N/A

closed and contacts are clean.

 

 

2.Check for line voltage power at

 

the oil primary control. Voltage

 

 

 

 

should be 120 Vac between the

N/A

 

N/A

 

black and white lead wires on

 

 

 

 

the oil primary control.

 

 

 

3. Check indicator light with burner

Indicator light is on.

Cad cell is defective, sees external light, or connections have

 

off, no call for heat (no flame).

shorted. Go to step 4.

 

 

 

 

Indicator light turns off.

Eliminate external light source or permanently shield cad cell.

 

 

 

 

 

 

 

 

•

Replace cad cell with new cad cell and recheck.

4.

Shield cad cell from external

 

•

If indicator light does not turn off, remove yellow lead wires

 

 

from R7184 and recheck.

 

light.

Indicator light stays on.

 

 

•

If indicator light is still on, replace the R7184 control.

 

 

 

 

 

 

•

If the indicator light turns off, replace cad cell bracket

 

 

 

 

assembly.

5.

Verify that the oil valve is closed

 

 

 

 

during the “valve on delay”

 

 

 

 

period by opening view port and

Indicator light is on.

If flame is present, replace the oil valve.

 

verifying that no flame is present

 

 

 

 

 

during the 15-second “valve on

 

 

 

 

delay”.

 

 

 

 

 

 

Trouble is in thermostat circuit. Check thermostat-wiring

 

 

Burner starts.

connections.

6.

Jumper thermostat (T -T)

If connections are clean and tight, check thermostat wires for

 

 

terminals on R7184

 

continuity.

 

 

 

 

 

 

 

 

•

Disconnect line voltage power and open line switch.

 

IMPORTANT

 

•

Check all wiring connections.

 

Burner does not start.

•

Tighten any loose connections and recheck.

First remove one thermostat lead

• If burner still doesn't start, replace R7184.

wire.

 

 

 

 

 

If burner still doesn't start, check the oil burner motor. It may be

 

 

 

seized or burned out.

Condition: Burner starts then locks out on safety with indicator light flashing at 1/2 second on, 1/2 second off.

Procedure

Status

Corrective Action

7. Reset oil primary control by

Indicator light stops flashing.

Go to Step 8.

 

 

Indicator light continues to flash

 

pushing in and releasing red

Verify that the control is not in restricted mode. (See notes at end of

reset button.

at 1/2 second on, 1/2 second off

this table.). If not in restricted mode, replace R7184

 

rate.

 

27

30318 R4 9/9/2005

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Contents WML-C and MPL-B Table of Contents Location of Unit DOWN-FLOW InstallationIntroduction Heat LossAIR Conditioning Suspended InstallationChimney Venting Combustion AIRCommon Chimney Problems Electrical Connections Piping InstallationOptional Side Wall Venting OIL TankCirculating AIR Blower FAN Timer Board and Limit ControlHoneywell ST9103 Dip Switch Blower Off Delay Position Time Dip Switch Blower Delay Position Times Off Seconds MinutesOIL Burner HumidifierChecking Over-Fire Draft Furnace Installation SET- UPMaintenance and Service Routine Maintenance By Home OwnerAnnual Service By Contractor To Shut Down Unit Operating InstructionsBefore Lighting To Light UnitAF76YB Appendix A- WML-C and MPL-B Burner SET UPOIL Burner AIR Adjustment Burner ElectrodesStart UP Power CFMSpeed 20 x 20 x Size WeightModel 55-1/4 19 x 18 xAppendix B Wiring Diagrams Beckett Afii Burner Wiring Diagram Riello 40F3 and F5 Burner Wiring Diagram Riello 40BF3 Burner Wiring Diagram Operation of OIL Burner Thermostat calls for heat 30318 R4 9/9/2005 Operation Returns to Idle State Recycle Timer StartsHeat Mode Action System ResponseR7184 LED Diagnostic Light TroubleshootingElectrical Shock Hazard Corrective Action Table C-3 R7184 TroubleshootingRemount control onto burner housing. Go to step Problem Possible Cause Remedy Table C4 System and General TroubleshootingTiming Final Check OUT Parts Listing Counterflow Horizontal Model WML C Parts Listing Vestibule KIT WML C 30318 R4 9/9/2005 Parts Listing Counterflow Horizontal Model MPL Flame Retention Head MPL 30318 R4 9/9/2005 If Different from Installation Contractor HOMEOWNER’S Reference TableFuel Supplier 30318 R4 9/9/2005 Tel 716 Fax 716

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