AERCO Innovation (G-10-1350 to G-11-0563) - Manual (Page 78)

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Innovation Series Water Heaters Chapter 7
OMM-0079_0B USER MANUAL Troubleshooting Guide
Page 78 of 200 AERCO International, Inc.
· 100 Oritani Dr. · Blauvelt, NY 10913 · Phone: 800-526-0288
PR1 - 07/21/11
TABLE 7-1. WATER HEATER TROUBLESHOOTING – Continued
FAULT INDICATION PROBABLE CAUSES CORRECTIVE ACTION
(continued) 7. Carbon or other debris on Burner.
8. Staged ignition ball valve closed.
9. Staged ignition solenoid valve
doesn’t open.
10. Clogged staged ignition piece.
7. Remove the burner and inspect for any carbon or debris. Clean
and reinstall.
8. Open ball valve downstream of SSOV (see Figure 7-1).
9. When unit goes to ignition, listen to the solenoid valve for a
clicking sound to ensure it is opening.
10. Remove and inspect staged ignition piece for blockage.
FLAME LOSS
DURING RUN
1. Worn Flame Detector or cracked
ceramic.
2. Defective Regulator.
3. Poor combustion calibration.
4. Debris on burner.
5. Blocked condensate drain.
1. Remove and inspect the Flame Detector for signs of wear or
cracked ceramic. Replace if necessary.
2. Check gas pressure readings using a gauge or manometer into
and out of the Air/Fuel Valve to ensure that the gas pressure
into and out of the valve is correct.
3. Check combustion calibration. Adjust as necessary.
4. Remove the burner and inspect for any carbon or debris. Clean
and reinstall.
5. Remove blockage in condensate drain.
HEAT DEMAND
FAILURE
1. The Heat Demand Relays on the
Ignition/Stepper board failed to
activate when commanded.
2. Relay is activated when not in
Demand
1. Press CLEAR button and restart the unit. If the fault persists,
replace Ignition/Stepper (IGST) Board.
2. Defective relay. Replace IGST Board.
HIGH EXHAUST
TEMPERATURE
1. Poor combustion calibration
2. Heat exchanger has scale.
1. Check combustion calibration using procedures in Chapter 4.
2. Clean heat exchanger using procedures in Chapter 6.