AERCO Innovation (G-13-1854 and above) - Manual (Page 91)

Innovation Water Heaters Installation, Operation & Maintenance Manual
CHAPTER 7 – TROUBLESHOOTING GUIDE
OMM-0078_0J
AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913
Page 91 of
196
GF-128
Phone: 800-526-0288
PRI: 11/22/2013
TABLE 7-1. WATER HEATER TROUBLESHOOTING – Continued
FAULT INDICATION PROBABLE CAUSES CORRECTIVE ACTION
DELAYED
INTERLOCK OPEN
1. Delayed Interlock Jumper not
installed or removed.
2. Device proving switch hooked to
interlocks is not closed
1. Check for a jumper properly installed across the delayed
interlock terminals in the I/O box.
2. If there are 2 external wires on these terminals, check to see if
an end switch for a device such as a pump, louver, etc. is tied
these interlocks. Ensure that the device and or its end switch
are functional. (jumper may be temporarily installed to test
interlock)
FLAME LOSS
DURING IGN
1. Burner Ground Screw not installed
or loose.
2. Worn flame detector
3. No spark from Spark Plug
4. Defective Ignition Transformer
5. Defective Ignition/Stepper (IGST)
Board
6. Defective SSOV
7. Carbon or other debris on Burner.
1. Inspect and install/retighten Burner Ground Screw.
2. Remove and inspect the flame detector for signs of wear.
Replace if necessary.
3. Close the internal gas valve in the unit. Install and arc a spark
ignitor outside the unit.
4. If there is no spark, check for 120VAC at the primary side to the
ignition transformer during the ignition cycle.
5. If 120VAC is not present, the IGST Board in the Control Box
may be defective. Refer fault to qualified service personnel.
6. While externally arcing the spark ignitor, observe the
open/close indicator in the Safety Shut-Off Valve to ensure it is
opening. If the valve does not open, check for 120VAC at the
valves input terminals. If 120VAC is not present, the IGST
board in the Control Box may be defective. Refer fault to
qualified service personnel.
7. Remove the burner and inspect for any carbon or debris. Clean
and reinstall.