Roberts Gorden UHD[X][S][R] 125, UHD[X][S][R] 75 Troubleshooting for Flame Supervision System

Models: UHD[X][S][R] 125 UHD[X][S][R] 75

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13.3 Troubleshooting for Flame Supervision System

SECTION 13: TROUBLESHOOTING

13.3 Troubleshooting for Flame Supervision System

To measure flame current, connect a 0 - 50 μA DC meter in series with the flame probe. If the meter reads negative values, then reverse the test leads.

START

Connect a DC ammeter in series with the flame probe.

Is the flame present and at least 1 μA DC flame current?

Yes

Is there a current flowing in the flame probe circuit with no flame present?

No

Does “lockout” occur when there is a flame present?

No

Heater Operating

TROUBLESHOOT ENDS.

 

Use General

 

 

No

Troubleshooting section to

 

 

 

trace the fault.

 

 

 

Is the connecting lead

 

Repair or replace as

Yes

damaged? Is the flame probe

Yes

required.

damaged or touching earthed

 

components?

 

 

 

Is inlet burner gas pressure

 

 

Yes

correct? Is live and neutral

Yes

Replace ignition control.

polarity correct? Is

 

 

 

 

flame probe circuit correct?

 

 

No

Repair or replace as

required.

If problems persist, contact

No

Roberts-Gordon LLC at

www.rg-inc.com

 

NOTE: Minimum flame probe current 1 μA DC. Typical flame probe current 3-5 μA DC.

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Roberts Gorden UHD[X][S][R] 125, UHD[X][S][R] 75 service manual Troubleshooting for Flame Supervision System