Troubleshooting The Gas Burner - Wacker Neuson E3000 Operator's Manual

Troubleshooting
10.3

Troubleshooting the Gas Burner

Problem / Symptom
The flame ignites, but the
burner goes to lockout
within 5 seconds
The burner goes to lockout
after the prepurge period
because the flame does not
ignite.
The burner does not start
when the temperature con-
troller calls for heat.
The burner continues to
repeat the starting cycle
without going into lockout.
The burner does not go
through prepurge, and the
control module goes to
lockout.
Reason
The phase/neutral lines are
reversed.
The wiring to ground is
faulty.
The ionization probe is
grounded, or not in contact
with the flame, or the circuit
to the control box is broken.
The spark interferes with
the flame signal due to
incorrect setting of the elec-
trode.
There is air in the gas line.
The gas valve is passing
too little gas.
The spark is irregular or not
present.
There is low gas pressure.
The 24V switching relay is
faulty.
The burner switch is OFF.
The circuit breaker is
tripped.
Terminals on the control
module are bent or loose.
The motor is faulty.
The capacitor is faulty.
The end switch on the air
damper is faulty.
The control module is faulty. Replace the control module.
The air pressure switch is
not in the normally closed
position.
Gas pressure switch set
incorrectly.
Air pressure switch is not
changing from normally
closed to normally open
due to insufficient air pres-
sure in the combustion
head.
172
E 3000
Remedy
Correct the wiring.
Correct the wiring.
Correct the wiring.
Readjust the ignition elec-
trode.
Bleed the gas line.
Check and adjust the gas
pressure.
Readjust the ignition elec-
trode.
Adjust the gas pressure.
Replace the 24V relay.
Turn the burner switch ON.
Reset the circuit breaker.
Repair or replace the con-
trol module.
Repair or replace the motor.
Replace the capacitor.
Replace the end switch.
Replace the air switch.
Reset the gas pressure
switch.
Adjust the combustion
head.
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