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Benchmark with Edge [I]: Operation-Maintenance Manual
SECTION 9
– TROUBLESHOOTING
OMM-0145_A99
• GF-218 • 9/18/2019 Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST Page
147
of
157
TABLE 9-1: Boiler Troubleshooting Procedures
Fault
Probable Causes
Corrective Action
AIRFLOW
FAULT
DURING
PURGE
1.
Blower not running or running
too slow.
1.
Start the unit. If the blower does not run check
the blower solid state relay for input and
output voltage. If the relay is OK, check the
blower.
2.
Defective Blocked Inlet switch.
2.
Start the unit. If the blower runs, turn off unit
and check the Blocked Inlet switch for
continuity. Replace the switch if continuity
does not exist.
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.
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 [i]
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.