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Innovation - Edge [i] Installation, Operation, Maintenance Manual
CHAPTER 7
– TROUBLESHOOTING GUIDE
OMM-0143_A
• GF
-216
•
9/6/2019
Technical Support
•
(800) 526-0288
•
Mon-Fri, 8 am - 5 pm EST Page 103 of 170
TABLE 7-1. WATER HEATER TROUBLESHOOTING
FAULT INDICATION
PROBABLE CAUSES
CORRECTIVE ACTION
HIGH WATER TEMP
SWITCH OPEN
1.
Faulty Water temperature switch.
1.
Test the temperature switch to insure it trips at its actual water
temperature setting.
2.
Incorrect PID settings.
2.
Check PID settings against Menu Default settings in Chapter 3.
If the settings have been changed, record the current readings
then reset them to the default values.
3.
Faulty shell temperature sensor.
3.
Using the resistance charts in Appendix C, measure the
resistance of Shell sensor and BTU sensor at a known water
temperature.
4.
Unit in MANUAL mode
4.
If
Manual
Mode
=
Enabled
, set it to
Disabled
.
5.
Unit setpoint is greater than
Over
Temperature
switch setpoint.
5.
Check setpoint of unit and setpoint of Temperature switch.
Ensure that the temperature switch is set higher than the unit’s
setpoint.
6.
System flow rate changes are
occurring faster than units can
respond.
6.
If the system is a variable flow system, monitor system flow
changes to ensure that the rate of flow change is not faster than
what the units can respond to.
HIGH WATER
TEMPERATURE
1.
See HIGH WATER TEMPERATURE
SWITCH OPEN.
1.
See HIGH WATER TEMPERATURE SWITCH OPEN.
2.
Temp HI Limit setting is too low.
2.
Check Temp HI Limit setting.
IGN BOARD COMM
FAULT
1.
Communication fault has occurred
between the PMC board and
Ignition/Stepper (IGST) board.
1.
Press
CLEAR
button and restart unit. If fault persists, contact
qualified Service Personnel.
IGN SWITCH CLOSED
DURING PURGE
1.
Air/Fuel Valve not rotating.
1.
Start the unit. The Air/Fuel Valve should rotate to the purge
(open) position. If the valve does not rotate at all or does not
rotate fully open, check the Air/Fuel Valve calibration. If
calibration is okay, the problem may be in the Air-Fuel Valve or
the
Edge
Controller. Refer to qualified service personnel
2.
Defective or shorted switch
2.
If the Air/Fuel Valve does rotate to purge, check the
Ignition
switch for continuity between the N.O. and COM terminals. If the
switch shows continuity when not in contact with the cam
replace the switch.