OMM-0153_E
• 5/11/2023 Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST Page 100 of 124
CENTURION Installation, Operation & Maintenance Manual
SECTION 10: TROUBLESHOOTING
Centurion Troubleshooting Procedures
Fault
Probable Causes
Corrective Action
4.
Blocked blower inlet or inlet
ductwork.
4.
Inspect the inlet to the combustion blower including
any ductwork leading up to the combustion blower
for signs of blockage.
5.
No voltage to Blocked Inlet
switch from Edge Controller.
5.
During the start sequence, verify that 24 VAC is
present between each side of the switch and
ground. If 24 VAC is not present, refer fault to
qualified service personnel.
6.
PROBABLE CAUSES from 3 to
12 for AIRFLOW FAULT
DURING IGNITION apply for
this fault.
6.
See CORRECTIVE ACTIONS for AIRFLOW FAULT
DURING IGNITION, items 3 to 12.
7.
Missing or improperly
connected Blocked Flue
jumper.
7.
Check auxiliary box to be sure Blocked Flue input is
jumpered and properly connected.
AIRFLOW
FAULT DURING
RUN
1.
Blower stopped running due
to thermal or current
overload.
1.
Check blower for signs of excessive heat or high
current draw that may trip thermal or current
overload devices.
2.
Blocked Blower inlet or inlet
ductwork.
2.
Inspect the inlet to the blower, including any
ductwork leading up to the combustion blower, for
signs of blockage.
3.
Blockage in air filter or
Blocked Inlet switch.
3.
Remove the air filter and Blocked Inlet switch and
inspect for signs of blockage, clean or replace as
necessary.
4.
Defective Blocked Inlet
switch.
4.
Verify that 24 VAC is present between each side of
the switch and ground. If 24 VAC is not present at
both sides, replace switch.
5.
Combustion oscillations.
5.
Run unit to full fire. If the unit rumbles or runs
rough, perform combustion calibration.
6.
Probable causes from 3 to
16 for AIRFLOW FAULT
DURING IGNITION applies
for this fault.
6.
See CORRECTIVE ACTIONS from 3 to 12 for AIRFLOW
FAULT DURING IGNITION.
DELAYED
INTERLOCK
OPEN
1.
Delayed Interlock Jumper
not properly installed or
missing.
1.
Check to insure jumper is properly installed across
the Delayed Interlock terminals in the I/O Box.
2.
Device proving switch
hooked to interlocks is not
closed.
2.
If there are 2 external wires on these terminals,
check if an end switch for a proving device (such as a
pump, louver, etc.) is tied to the interlocks. Ensure
the device and/or its end switch is functional. A
jumper may be temporarily installed to test the
interlock.
