Innovation - Edge [i] Installation, Operation, Maintenance Manual
CHAPTER 7
– TROUBLESHOOTING GUIDE
OMM-0143_A
• GF
-216
•
9/6/2019
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TABLE 7-1. WATER HEATER TROUBLESHOOTING
FAULT INDICATION
PROBABLE CAUSES
CORRECTIVE ACTION
AIRFLOW FAULT
DURING IGNITION
1.
Blower stopped running due to thermal
or current overload.
1.
Check combustion blower for signs of excessive heat or high
current drain that may trip thermal or current overload devices.
2.
Blocked
Blower Inlet
or inlet
ductwork.
2.
Inspect the inlet to the combustion blower including any
ductwork leading up to the combustion blower for signs of
blockage.
3.
Blocked
Blower Proof
switch.
3.
Remove the
Blower Proof
switch and inspect for signs of
blockage, clean or replace as necessary.
4.
Blocked
Blocked-Air Inlet
switch.
4.
Remove the
Blocked-Air Inlet
switch and inspect for signs of
blockage, clean or replace as necessary.
5.
Defective
Blower Proof
switch.
5.
Measure the
Blower Proof
switch for continuity with the
combustion blower running. If there is an erratic resistance
reading or the resistance reading is greater than zero ohms,
replace the switch.
6.
Defective
Blocked-Air Inlet
switch.
6.
Measure the
Blocked-Air Inlet
switch for continuity with the
combustion blower running. If there is an erratic resistance
reading or the resistance reading is greater than zero ohms,
replace the switch.
7.
Loose temperature to AUX connection
in I/O Box.
7.
Check the actual inlet air temperature and measure voltage at
AUX input in the I/O Box. Verify that the voltage conforms to the
values shown in the tabular listing provided in Appendix C.
8.
Defective temperature sensor.
8.
Refer to item 7, above, and verify that the voltage conforms to
the values shown in Appendix C.
9.
Loose wire connection between the 0-
10V signal from I/O box to the Blower
Motor input.
9.
Check wire connection from I/O Box 0-10V signal to the Blower
Motor.
10.
Defective I/O box.
10.
Measure voltage at the I/O box 0-10V output. A voltage of 8.2V
equates to a 100% open valve position.
11.
Wrong 0-10V output selection on the
Edge
Controller.
11.
Check that the blower Analog Out terminal on the I/O board has
a corresponding signal for the A/F valve.
12.
Defective Air-Fuel Valve
potentiometer.
12.
Check Air/Fuel Valve position at 0%, 50% and 100% open
positions. The positions on the VALVE POSITION bargraph
should match the dial readings on the Air/Fuel Valve dial.