Watts Aerco Innovation 800 User Manual page 93

Innovation Hot Water Hot Water Boiler User Manual
FAULT
INDICATION
Blower stopped running due to thermal
1.
AIRFLOW FAULT
or current overload.
DURING IGNITION
Blocked Blower Inlet or inlet ductwork.
2.
Blocked Blower Proof switch.
3.
Blocked Blocked-Air Inlet switch.
4.
Defective Blower Proof switch.
5.
Defective Blocked-Air Inlet switch.
6.
Loose temperature to AUX connection in
7.
I/O Box.
Defective temperature sensor.
8.
9. Loose wire connection between the 0-
10V signal from I/O box to the Blower
Motor input.
Defective I/O box.
10.
Wrong 0-10V output selection on the
11.
control box.
Defective Air-Fuel Valve potentiometer.
12.
OMM-0120_0A
GF-128-I
CHAPTER 7 – TROUBLESHOOTING GUIDE
TABLE 7-1. HOT WATER BOILER TROUBLESHOOTING
PROBABLE CAUSES
AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913
Phone: 800-526-0288
- INTERNATIONAL
CORRECTIVE ACTION
Check combustion blower for signs of excessive heat or high
1.
current drain that may trip thermal or current overload devices.
Inspect the inlet to the combustion blower including any
2.
ductwork leading up to the combustion blower for signs of
blockage.
Remove the Blower Proof switch and inspect for signs of
3.
blockage, clean or replace as necessary.
Remove the Blocked-Air Inlet switch and inspect for signs of
4.
blockage, clean or replace as necessary.
Measure the Blower Proof switch for continuity with the
5.
combustion blower running. If there is an erratic resistance
reading or the resistance reading is greater than zero ohms,
replace the switch.
Measure the Blocked-Air Inlet switch for continuity with the
6.
combustion blower running. If there is an erratic resistance
reading or the resistance reading is greater than zero ohms,
replace the switch.
Check the actual inlet air temperature and measure voltage at
7.
AUX input in the I/O Box. Verify that the voltage conforms to the
values shown in the tabular listing provided in Appendix C.
Refer to CORRECTIVE ACTION 7 and verify that the voltage
8.
conforms to the values shown in Appendix C.
Check wire connection from I/O Box 0-10V signal to the Blower
9.
Motor.
Measure voltage at the I/O box 0-10V output. A voltage of 8.2V
10.
equates to a 100% open valve position.
Check the Analog Out option on the C-More Configuration
11.
Menu. Valve Position 0-10V should be selected.
Check Air/Fuel Valve position at 0%, 50% and 100% open
12.
positions. The positions on the VALVE POSITION bargraph
should match the dial readings on the Air/Fuel Valve dial.
Page 93 of 174
11/15/2016