Rheem Guardian PowerVent - Unable to Light Pilot Issues

Guardian PowerVent Training Manual SVC900; Rev 1
Page 28
TROUBLESHOOTING TABLE
NATURE OF
TROUBLE
POSSIBLE CAUSES WHAT TO DO
No Hot Water 1. Electrical supply turned off
2. Gas supply turned off
3. Pilot does not light
4. Main burner does not light
5. ECO is tripped
6. Flammable Vapor Sensor trip.
Check fuse panel and on/off switch
at blower motor.
Verify proper continuity on wall
plug (control will flash 4/1).
Turn on gas supply; turn on gas
valve.
Check 1 and 2 above. Then see
Unable to light pilot and Pilot does
not stay lit.
See Main burner will not stay lit.
Verify ECO with continuity test.
Replace electronic control module
and sensor.
Not Enough Hot
Water
1. Thermostat set too low
2. Burner orifice or burner plate is
clogged
3. Low gas pressure
6. Thermostat out of calibration
7. Defective dip tube
8. Heater is undersized
Adjust thermostat.
Inspect and clean orifice and
burner plate.
Check gas supply pressure and
manifold pressure.
Conduct partial draw test to verify
thermostat.
Verify thermistor with ohms
resistance test.
Check and replace dip tube.
Adjust peak hour demand.
Unable to light pilot
(and I don’t hear the
spark ignitor)
You may see one of
the following flash
codes:
1/1
3/1
3/3
1. Blower motor not operating
2. Vacuum switch damaged
3. Vent safety over-temp switch is
tripped.
4. Spark ignitor is damaged.
5. Gas valve damaged.
6. Energy Cut-off (ECO) is
tripped.
Verify unit is plugged in and
rocker switch set to ON.
Control module will flash with 3/3.
Check venting for restrictions.
Retry or replace blower assembly.
Exhaust gases exceeded 180°F.
Check combustion chamber,
blower motor area, and venting for
obstructions and excessive
temperature. Allow to cool. Retry.
Check and replace spark ignitor or
ignitor wire.
Verify 120V at blue wire (pin #7).
If 120V, then you must also have
spark. Replace gas valve.
Verify continuity at ECO. Replace
gas control.