Innovation - Edge [i] Installation, Operation, Maintenance Manual
CHAPTER 7
– TROUBLESHOOTING GUIDE
OMM-0143_A
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-216
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9/6/2019
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TABLE 7-1. WATER HEATER TROUBLESHOOTING
FAULT INDICATION
PROBABLE CAUSES
CORRECTIVE ACTION
RESIDUAL
FLAME
1.
SSOV not fully closed.
1.
Check open/close indicator window of Safety Shut-Off Valve
(SSOV) and ensure that the SSOV is fully closed. If not fully
closed, replace the valve and or actuator.
Close the 1” Gas Shut-Off Valve downstream of SSOV (Figure 7.2-
1). Install a manometer or gauge at the leak detection port
between the SSOV and Gas Shut Off Valve. If a gas pressure
reading is observed replace the SSOV Valve and/or Actuator.
2.
Defective Flame Detector.
2.
Replace Flame Detector.
SSOV FAULT DURING
PURGE
See SSOV SWITCH OPEN
SSOV FAULT
DURING RUN
SSOV switch closed for 15 seconds
during run.
Replace or adjust micro switch in SSOV actuator. If fault persists,
replace actuator.
SSOV RELAY
FAILURE
1.
SSOV relay failed on IGST board.
1.
Press
CLEAR
button and restart unit. If fault persists, replace
Ignition/Stepper (IGST) Board.
2.
Floating Neutral.
2.
The Neutral and Earth Ground are not connected at the source
and therefore there is a voltage measured between the two. This
measurement should be near zero or no more than a few
millivolts.
3.
Hot and Neutral reversed at SSOV.
3.
Check SSOV power wiring.
SSOV
SWITCH OPEN
1.
Actuator not allowing for full closure of
gas valve.
1.
Observe operation of the Safety Shut-Off Valve (SSOV) through
indicator on the Valve actuator and ensure that the valve is fully
and not partially closing.
2.
SSOV powered when it should not be.
2.
If the SSOV never closes, it may be powered continuously.
Close the gas supply and remove power from the unit. Refer
fault to qualified service personnel.
3.
Defective switch or Actuator.
3.
Remove the electrical cover from the SSOV and check switch
continuity. If the switch does not show continuity with the gas
valve closed, either adjust or replace the switch or actuator.
4.
Incorrectly wired switch.
4.
Ensure that the SSOV Proof of Closure switch is correctly wired.