Part 3 trouble chart – Midco Economite RE4400B / RE4400BA User Manual
Page 15
Part 3 Trouble Chart
TROUBLE CHART
Make sure the thermostat and operating controls are calling for heat.
CAUTION: If a test indicates an electrical component may be defective,
before replacing it, make sure that its associated wiring is not at fault.
ELECTRICAL AND FLAME CHECKS MUST BE MADE IN THE ORDER LISTED BELOW.
I.
MOTOR WILL NOT RUN
A.
Confirm 120V between strip terminals L1 and L2 and verify the circuit polarity and
electrical ground between strip terminal L1 and burner Ground.
B.
Check for 120V between strip terminals L1 and L2.
1.
No voltage, open circuit in operating controls.
2.
Voltage present, motor is defective.
II.
MOTOR RUNS CONTINUOUSLY, PILOT WILL NOT LIGHT
A.
Confirm that ALL Main Manual Shut-Off Valves are in the ON position.
B.
After the pre-purge, if the pilot flame is not proven within the pilot flame re-
re-establishing period, or if the proof of flame is lost during the burner run and the
pilot is not re-established after the pre-purge, the Ignition Control Module will lock
out. To reset the control for restart, de-energize the Ignition Control Module by
setting the operating control to OFF or thermostat below room temperature for at
least 60 seconds.
C.
Clogged pilot orifice.
D.
Pilot regulator mis-adjusted
or defective.
E.
Defective spark electrode or
Ignition Control Module.
F.
Defective high tension wire.
G.
Wrong pilot orifice.
H.
Defective pilot valve.
I.
Pilot air tube clogged.
J.
Incorrect spark gap.
K.
Pilot regulator vent clogged.
L.
Defective blower air switch.
M. Slow motor.
N.
Step down transformer is defective.
III
PILOT LIGHTS, NO MAIN FLAME
A.
Poor pilot flame adjustment.
B.
Clogged pilot air tube.
C.
Defective flame sensing rod or wire.
D.
Flame sensing rod mis-located.
E.
Pilot regulator vent clogged.
F.
Defective Ignition Control Module.
G.
Defective main gas valve.
H.
Low gas pressure.
I.
Grossly mis-adjusted main gas and air.
15
Part 3
Continued
Trouble Chart
I
Motor Will
Not Run or Motor
Runs in Repeated
Cycles
II Motor
Runs
Continuously, But
No Flame
III Pilot
Lights,
No Main Flame