AERCO Innovation (G-14-2265 and above) - Manual (Page 109)

Innovation Water Heaters Installation, Operation & Maintenance Manual
CHAPTER 7 – TROUBLESHOOTING GUIDE
OMM-0078_0L AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 Page 109 of 206
GF-128
Phone: 800-526-0288
PRI: 11/25/2014
7.2 ADDITIONAL FAULTS WITHOUT SPECIFIC FAULT MESSAGES
Refer to Table 7-2 to troubleshoot faults which may occur without a specific fault message being displayed.
TABLE 7-2. WATER HEATER TROUBLESHOOTING WITH NO FAULT MESSAGE DISPLAYED
OBSERVED INCIDENT PROBABLE CAUSES CORRECTIVE ACTION
Fluctuating Gas Pressure 1. Gas pressure going into unit is
fluctuating.
2. Damping Orifice not installed.
1. Stabilize gas pressure going into unit. If necessary,
troubleshoot Building Supply Regulator.
2. Check to ensure that the Damping Orifice is installed in the
SSOV Actuator shown in Figure 7-3. (For DBB Gas Trains,
the Damping Orifice is installed in the downstream SSOV
Actuator).
Air/Fuel Valve “hunting” at
the 80% Valve Position
1. IGST and Power Supply Boards
in Control Box are outdated. 1. Check to ensure that the IGST and Power Supply Boards
are Rev. E or higher.