Roberts Gorden UHD[X][S][R] 75 Troubleshooting for Gas Valves, Troubleshooting for Flue Blower

UHD LOW PROFILE DUCT FURNACE INSTALLATION OPERATION AND SERVICE MANUAL

13.4 Troubleshooting for Gas Valves

START

Is gas pressure at inlet of the valve correct for gas type?

Note pressure found.

Yes

Does gas pressure at outlet

of the valve rise when

valve turns on?

Yes

Does gas pressure at

outlet of valve return to zero or

lower when valve turns off?

Yes

No

No

No

Fault elsewhere.

Correct pressure problem.

Valve or ignition control

faulty. Replace with one of correct type.

Valve faulty.

Replace with one of

correct type.

Valve Operating		If problems persist, contact
	No	Roberts-Gordon LLC at
TROUBLESHOOT ENDS.
		www.rg-inc.com

13.5 Troubleshooting for Flue Blower

START
Does flue blower run	No	Correct power
automatically when there
		supply problem.
is a call for heat?
		Yes
		Blower motor faulty.
		Replace with correct type.
Yes
Does blower turn on and		Check blower motor leads
off while burner is firing	Yes
		for loose connections.
continuously?
No
Blower Operating		If problems persist, contact
	No	Roberts-Gordon LLC at
TROUBLESHOOT ENDS.
		www.rg-inc.com

For optimum heater performance, use only replacement parts sold and supplied by Roberts-Gordon.

Conduct start-up procedure as shown on Page 23, Section 10.

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