State GS6 75 YRVHTL - Manual (Page 54)

PROBLEM POSSIBLE CAUSE(S) CORRECTIVE ACTION
BLOWER RUNS
CONTINUOUSLY
1. Air pressure switch not closing due to
insuffi cient draft – check for:
a. Vent piping blocked
b. Piping length too long
c.
Clogged/dirty blower
2. Disconnected, torn or blocked pressure
switch hose from air pressure switch to
blower housing
3. Defective pressure switch
4. High limit switch open due to excessive
vent temperature or defective switch
1. Determine cause of insuffi cient
draft. Check draft with manometer at
pressure switch
a. Remove blockage
b. Reduce vent length/increase vent
size
c. Clean blower wheel
2. Reconnect or replace pressure switch
hose
3. Replace defective pressure switch
4. Determine cause of overheating check
for: overfi ring, insuffi cient air supply,
high ambient air temperature
HOT SURFACE IGNITER
NOT GLOWING
FOLLOWING WARM-UP
PERIOD
1. 120VAC polarity reversed at 120VAC
outlet receptacle
2. Defective hot surface igniter
3. Defective gas control valve/thermostat
1. Reverse polarity at 120VAC outlet
receptacle
2. Replace igniter
3. Replace gas control valve/thermostat
VENT PIPE TOO HOT
1. Blower high limit switch fails to open -
switch defective
2. Not enough dilution air to mix with fl ue
gases
3. Air in room too hot for mixing with fl ue
gases
4. Wrong burner orifi ce
1. Replace blower high limit switch Replace
blower high limit switch
2. Proper air circulation must be provided
for combustion and dilution of fl ue temp
3. Increase ventilation to lower room
temperature
4. Install correct orifi ce.
RESETTING THE HEATER CONTROL
• Soft lockouts as diagnosed by the system error codes
require the gas control to be reset.
• To reset the control, slide the “ON/OFF” switch to the
“OFF” position. Wait for 10 seconds and move the
switch back to the “ON” position.
• If the problem that caused the control to lock out has
not been corrected, the control will remain or again go
back into lockout.
LOCKOUTS
Soft Lockout
• occurs when a system safety device trips to break the
sequence of operation. The control will retry the system
in a timed basis but will not reinstate operation until the
failure is corrected.
Hard Lockout
• occurs when the main controller fails and must be
replaced.
The gas control valve\thermostat includes a temperature
limiting ECO (Energy Cut Off) system that will shut off the
water heater if the water temperature is too high.
Should the water temperature get too high, the diagnostic
status light will indicate a code (4 fl ashes), indicating an
over-temperature condition and the main burner will be
shut off. If a high temperature condition occurs, turn the
main gas supply OFF and have the water heater repaired
by a qualifi ed service technician. Contact your local dealer
for service information.
Note: Should an over-temperature condition occur, restart
the water heater and verify the LED fl ash sequence. If the
4 fl ash sequence is observed, slide the “ON/OFF” switch to
the “OFF” position. Turn Main Gas Supply “OFF”. Replace
the gas control valve\thermostat. See “Removing and
Replacing the Gas Control Valve/Thermostat.”
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