69
N. DIAGNOSTICS
Fault Codes with Descriptions and Solutions:
33
3. Confirm that burner flame is steady and directed down
center of burner tube. If flame turbulance is evident, note
if turbulance began when indoor blower motor was ener-
gized. This could be an indicaton of a damaged heat ex-
changer, i.e. breached primary tube.or loose swedge joint.
4. Confirm louvered panels are unobstructed. Confirm flue pipe
is unobstructed.
5. Insure properly sized burner orifices are installed. Check
manifold pressure at high and low-fire and compare to val-
ues found in Measuring and Adjusting Manifold Gas Pres-
sures section. Check rate and compare to nameplate input,
high and low-fire. Adjust as necessary.
6. Check that all burner assembly components are properly
installed. Confirm that burner flame is steady and directed
down the center of tube. If turbulence is noted, check for air
leaks between the burner and blower compartment.
44
LOW FIRE NEGATIVE PRESSURE CONTROL (NPC) CLOSED
(230V & 575V ONLY)
DESCRIPTION:
The low-fire NPC should be open when the in-
ducer is not operating. Before any heat cycle can begin, the NPC
is tested to confirm the contacts are open. An ignition sequence
will not occur if the low-fire NPC remains closed.
CAUSE:
1. NPC contacts are welded shut/faulty switch.
2. loose or faulty wiring
SOLUTION:
1. Replace low fire NPC.
2. Check wiring or connections, replace or repair as necessary
Summary of Contents for Climate Master RGED Series
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Page 90: ...90 P APPENDICES Appendix C Air Flow Performance Data Cont ...
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