Watts Aerco Innovation 800 User Manual page 100

Innovation Hot Water Hot Water Boiler User Manual
TABLE 7-1. HOT WATER BOILER TROUBLESHOOTING – Continued
FAULT INDICATION
(continued)
3.
4.
5.
PURGE SWITCH OPEN
1.
DURING PURGE
2.
3.
4.
5.
OUTDOOR TEMP
1.
SENSOR FAULT
2.
3.
RECIRCULATION PUMP
1.
FAILURE
REMOTE SETPT
1.
SIGNAL FAULT
2.
3.
Page 100 of 174
11/15/2016
CHAPTER 7 – TROUBLESHOOTING GUIDE
PROBABLE CAUSES
Switch wired incorrectly.
Defective Power Supply Board or
fuse.
Defective IGST Board
Defective purge switch.
No voltage present at switch.
Switch wired incorrectly.
Defective Power Supply Board or
fuse.
Defective IGST Board.
Loose or broken wiring.
Defective Sensor.
Incorrect Sensor.
Internal recirculation pump failed.
Remote setpoint signal not present:
Not yet installed.
Wrong polarity.
Signal defective at source.
Broken or loose wiring.
Signal is not isolated (floating) if 4 to
20 mA.
Control Box signal type selection
switches not set for correct signal
type (voltage or current).
AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913
- INTERNATIONAL
If the switch is wired correctly, replace the switch.
3.
Check DS1 & DS2 LEDs on Power Supply Board. If they are not
4.
steady ON, replace Power Supply Board.
Check "Heartbeat" LED DS1 and verify it is blinking ON & OFF
5.
every second. If not, replace IGST Board.
If the air-fuel valve does rotate, check purge switch for continuity
1.
when closing. Replace switch if continuity does not exist.
Measure for 24 VAC from each side of the switch to ground. If
2.
24VAC is not present, refer fault to qualified service personnel.
Check to ensure that the switch is wired correctly (correct wire
3.
numbers on the normally open terminals).
Check DS1 & DS2 LEDs on Power Supply Board. If they are not
4.
steady ON, replace Power Supply Board.
Check "Heartbeat" LED DS1 and verify it is blinking ON & OFF
5.
every second. If not, replace IGST Board.
Inspect Outdoor Temperature sensor for loose or broken wiring.
1.
Check resistance of sensor to ensure it is within specification.
2.
Ensure that the correct sensor is installed.
3.
Replace recirculation pump.
1.
Check I/O Box to ensure signal is hooked up.
1.
Hook up if not installed.
If installed, check polarity.
Measure signal level.
Check continuity of wiring between source and unit.
Check signal at source to ensure it is isolated.
2.
Check DIP switch on PMC board to ensure it is set correctly for
3.
the type of signal being sent. Check control signal type set in
Configuration Menu.
Phone: 800-526-0288
CORRECTIVE ACTION
OMM-0120_0A
GF-128-I