Watts Aerco Innovation 800 User Manual page 98

Innovation Hot Water Hot Water Boiler User Manual
TABLE 7-1. HOT WATER BOILER TROUBLESHOOTING – Continued
FAULT INDICATION
(continued) Switch wired incorrectly.
3.
Defective Power Supply Board or
4.
fuse.
Defective IGST Board.
5.
IGN SWITCH OPEN Air/Fuel Valve not rotating to
1.
DURING IGNITION ignition position.
Defective Ignition switch.
2.
Defective Power Supply Board or
3.
fuse.
4. Defective IGST Board.
INTERLOCK Interlock jumper not installed or
1.
OPEN removed.
Energy Management System
2.
does not have unit enabled.
Device proving switch hooked to
3.
interlocks is not closed.
Page 98 of 174
11/15/2016
CHAPTER 7 – TROUBLESHOOTING GUIDE
PROBABLE CAUSES
AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913
Phone: 800-526-0288
- INTERNATIONAL
CORRECTIVE ACTION
Check to ensure that the switch is wired correctly (correct wire
3.
numbers on the normally open terminals). If the switch is
wired correctly, replace the switch
Check DS1 & DS2 LEDs on Power Supply Board. If they are
4.
not steady ON, replace Power Supply Board.
Check "Heartbeat" LED DS1 and verify it is blinking ON &
5.
OFF every second. If not, replace IGST Board
Start the unit. The Air/Fuel Valve should rotate to the purge
1.
(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 Control Box. Refer fault to qualified service personnel.
If the Air/Fuel Valve does rotate to the ignition position, check
2.
the ignition position switch for continuity between the N.O.
and COM terminals when in contact with the cam.
Check DS1 & DS2 LEDs on Power Supply Board. If they are
3.
not steady ON, replace Power Supply Board.
4. Check "Heartbeat" LED DS1 and verify it is blinking ON &
OFF every second. If not, replace IGST Board.
Check for a jumper properly installed across the interlock
1.
terminals in the I/O box.
If there are two external wires on these terminals check any
2.
Energy Management system to see if they have the units
disabled (a jumper may be temporarily installed to see if the
interlock circuit is functioning).
Check that proving switch for any device hooked to the
3.
interlock circuit is closing and that the device is operational.
OMM-0120_0A
GF-128-I