Benchmark Platinum-Edge: Operation-Service Manual
SECTION 6 – TROUBLESHOOTING
OMM-0137_D • GF-211 • 7/16/2019 Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST Page 140 of 146
TABLE 10-1: Boiler Troubleshooting Procedures
Fault Probable Causes Corrective Action
PRG SWTCH
CLOSED
DURING
IGNITION
1. A/F Valve rotated open to purge and did not
rotate to ignition position.
1. Start the unit. The Air/Fuel Valve should rotate to the purge (open)
position, then back to ignition position (towards closed) during the
ignition cycle. If the valve does not rotate back to the ignition
position, check the Air/Fuel Valve calibration. If calibration is okay,
the problem may be in the Air/Fuel Valve or the Edge Controller.
Refer fault to qualified service personnel.
2. Defective or shorted switch. 2. If the Air/Fuel Valve does rotate to the ignition position, check the
purge switch for continuity between the N.O. and COM terminals. If
the switch shows continuity when not in contact with the cam, check
to ensure that the switch is wired correctly (correct wire numbers on
the normally open terminals).
3. Switch wired incorrectly. 3. If the switch is wired correctly, replace the switch.
4. Defective Power Supply Board or fuse. 4. Check DS1 & DS2 LEDs on Power Supply Board. If they are not
steady ON, replace Power Supply Board.
5. Defective IGST Board. 5. Check “Heartbeat” LED DS1 and verify it is blinking ON & OFF
every second. If not, replace IGST Board.
PRG SWTCH
OPEN DURING
PURGE
1. Defective Purge switch. 1. If the air-fuel valve does rotate, check Purge switch for continuity
when closing. Replace switch if continuity does not exist.
2. No voltage present at switch. 2. Measure for 24 VAC from each side of the switch to ground. If
24VAC is not present, refer fault to qualified service personnel.
3. Switch wired incorrectly. 3. Check to ensure that the switch is wired correctly (correct wire
numbers on the normally open terminals).
4. Defective Power Supply Board or fuse. 4. Check DS1 & DS2 LEDs on Power Supply Board. If they are not
steady ON, replace Power Supply Board.
5. Defective IGST Board. 5. Check “Heartbeat” LED DS1 and verify it is blinking ON & OFF
every second. If not, replace IGST Board.
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