Emerson White-Rodgers 50E47-843 Instrucciones De Instalación página 5

Call for heat, Thermostat
contacts close
Does Yello
approximately 2 seconds?
(Module Self Chec
yes
Does Yello
no
lit?
no
yes
no
glow red?
yes
Does the main burner light?
yes
Does system run until call for
heat ends?
Yes
Normal Operation
or
no
yes
yes
no
yes
no
no
no
Chec w Voltage to module (TH-TR). If no voltage:
Chec
Chec ent pressure switch (if used).
Measure voltage between ter
is approximately 145 V
secondary leads on control transformer. Correct reading
should be approximately 95 V
Reset control to clear lo out and confirm fault.
Rapid Flash = Flame Sensed when no flame should be present.
1 Flash = Number of Retries exceeded, control lo ed out.
2 Flashes = Recycles Exceeded, control lo ed out.
miswired gas valve. Chec
connection or swap wires to correct fault. If fault persists,
replace module.
Chec w Voltage to module (TH-TR).
Chec
Chec ent pressure switch (if used).
Indicates a poor flame sense signal. Chec or short in Flame
Sensor wiring, Poor Furnace or Bur
flame sensor, flame sensor wiring, or dirty flame probe.
Clean flame probe.
Confirm 120 Volts to ignitor ter
module) If voltage is present replace ignitor.
Chec
Chec or 24 volt output on module (terminals MV1 and MV2).
If no voltage replace module.
If gas valve is receiving voltage but not opening replace valve.
Chec witches.
Chec
Chec
temperature. Temperature above 1000 deg F. can ground
flame sense.
TROUBLESHOOTING
TH. If voltage
polarity is reversed; reverse
nal fault or
alve.
or continuity.
or excessive
or proper
ting
5