Reflect-O-Ray
®
EDS-4DI & EHS-4DI
Installation, Operation & Service
Combustion Research Corporation
Page 45
Does the burner and
vacuum exhauster shut off
when the temperature is
satisfied?
Replace thermostat.
END OF TROUBLE
SHOOTING
Does the burner stay on?
Is the flame sensor wire
loose or sensor porcelain
damaged?
Replace damaged
component.
YES
Is the ground wire from
the terminal on the
ignition control grounded
to the burner body?
Replace and /or secure
ground wire.
Is the flame signal
steady and 0.7 micro
amps or greater?
Replace ignition control.
Clean spark and flame
sensor assembly.
Replace if necessary.
YES
NO
YES
NO
NO
NO
Does the burner operate in HIGH
fire and LOW fire modes?
YES
Is there 24V power (coming from
the thermostat) at the thermostat
terminal block on the burner?
NO
Locate the source of the
problem between the
burner and the thermostat.
NO
On HIGH fire, is there 24V at
the T6 terminal on the burner
relay board ?
YES
Replace the Relay Board
NO
Does the air damper open when
the HIGH fire 24V is applied?
YES
Replace the air damper.
NO
Is there 24V applied to the HIGH
fire terminal on the gas valve?
YES
Replace Air Damper. NOTE: Make
sure the wire coming from the air
damper is functioning properly
(Replace if necessary)
NO
Does the gas valve open during
the HIGH fire mode (Manifold
pressure reading of 3.5" W.C
(NG) or 10.0" W.C. (LP)
Replace the two stage gas valve.
NO
YES
YES
NO