Fedders FV95A054 Installating And Operation Manual page 44

TABLE 10 : GENERAL TROUBLESHOOTING INTEGRATED FAN CONTROL
IF
Induced blower does 3 Flash code does not come on
not energize
Induced blower does 3 Flash code does come on
not energize
Induced blower is 2 Flash code does not come o n
energized
Induced blower turns off
2 Flash code
comes on
Pre-purge time h as HSI element does not glow r ed
expired within 10 seconds.
HSI element i s glow- No other visible control system
ing red. action
HSI element warm u p
time has expired a nd Main valve does not light within
main valve has been trial for ignition period
energized.
Main valve i s de-energized a t the
end of the trial for ignition period.
If main flame i s not sensed during
trial for ignition, system will shut o ff
Main burner lights
HSI element and main gas flow,
within trial for ignition
then g o through another purge
period.
period and initiate another ignition
trial. A total o f 4 ignition trials will
be attempted before the system
goes into lockout.
Main burner stays o n
after the end of t he Circulating fan is not turned on after
trial for ignition p e- 30-second time delay.
riod.
Main burner goes o ut
before thermostat call 4 Flash code comes on
for heat ends.
Main burner goes o ut
before thermostat call 4 Flash code does not come on
for heat ends.
Green LED off
5 Flash code comes
on.
AND
1. Induced blower wiring.
2. Induced blower.
1. Pressure switch stuck closed.
2. Pressure switch is mis-wired or jumpered.
Wait for the pre-purge to expire.
1. Pressure switch stuck in the open position.
2. Pressure switch, tubing and wiring.
3. Obstruction in furnace venting that is preventing proper combustion airflow.
1. Broken or damaged HSI element.
2. Broken or damaged HSI element leadwires.
Wait for HSI element warm up time to expire.
1. Induced blower moving main burner gas away from the HSI element.
2. Inlet gas pressure too low for main burner ignition.
3. Input line voltage too low to heat HSI element.
4. HSI element incorrectly positioned.
5. Clogged or incorrect main burner orifice.
1. Line voltage to L1 terminal of integrated furnace control must be
120 volts with reference to furncace chassis.
2. Furnace must be reliably connected to earth ground.
3. Induced blower moving main burner flame away from the flame sensor rod.
4. Inlet gas pressure too low for proper flame sensing.
5. Flame sensor rod contaminated or in incorrect position.
1. Wiring between system control and integrated furnace control.
2. Proper operation of integrated furnace control.
1. Open high limit switch.
2. High limit wiring in good condition and securely connected.
1.
Induced blower moving main burner flame away from flame sensor rod.
2.
Pressure switch has opened.
3.
Flame sensor rod ceramic or leadwire overheated.
4.
Gas supply / flow reduced or interrupted.
1.
Open flame rollout switch
2.
Rollout switch wiring in good condition
3.
Broken or damaged blower
42
CHECK or REPAIR