Watts Aerco Innovation 800 User Manual page 95

Innovation Hot Water Hot Water Boiler User Manual
TABLE 7-1. HOT WATER BOILER TROUBLESHOOTING – Continued
FAULT INDICATION
DELAYED Delayed Interlock Jumper not
1.
INTERLOCK OPEN installed or removed.
Device proving switch hooked to
2.
interlocks is not closed.
FLAME LOSS Burner Ground Screw not installed
1.
DURING IGN or loose.
Worn flame detector.
2.
No spark from Spark Plug.
3.
Defective Ignition Transformer.
4.
Defective Ignition/Stepper (IGST)
5.
Board.
Defective SSOV.
6.
Carbon or other debris on Burner.
7.
OMM-0120_0A
GF-128-I
CHAPTER 7 – TROUBLESHOOTING GUIDE
PROBABLE CAUSES
AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913
Phone: 800-526-0288
- INTERNATIONAL
CORRECTIVE ACTION
Check for a jumper properly installed across the delayed
1.
interlock terminals in the I/O box.
If there are 2 external wires on these terminals, check to see if
2.
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)
Inspect and install/retighten Burner Ground Screw.
1.
Remove and inspect the flame detector for signs of wear.
2.
Replace if necessary.
Close the internal gas valve in the unit. Install and arc a spark
3.
igniter-injector outside the unit.
If there is no spark, check for 120VAC at the primary side to the
4.
ignition transformer during the ignition cycle.
If 120VAC is not present, the IGST Board in the Control Box
5.
may be defective. Refer fault to qualified service personnel.
While externally arcing the spark igniter-injector, observe the
6.
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.
Remove the burner and inspect for any carbon or debris. Clean
7.
and reinstall.
Page 95 of 174
11/15/2016