John Wood Superflue Power Vent (75 Gallon) - Manual (Page 33)

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STEP CHECK THAT: POSSIBLE PROBLEM CORRECTION
1. All steps on installation check
list have been followed Incomplete installation Review installation check list
2. Gas supply matches heater
rating plate Wrong gas / Wrong heater model Match gas to heater type
3. Gas supply is “ON”
Gas control is “ON” No gas - Turn on gas supply
- Check and adjust pressure
accordingly
4. Heater is plugged into properly
fused circuit - No power
- Incorrect polarity at power
source
- Check power supply
- Check fuses
- Plug in heater
5. Thermostat is set to call for heat Thermostat set too low Rotate dial to higher setting
6. Gas control performs start up
diagnostic, LED flashes 3-4
times - Gas control may be damp from
excessive humidity or condensa-
tion. Steady red LED light may
show on
- Continuous flashing red light
indicates safety lockout.
- Steady red LED light, possible
Energy Cut-Off (ECO) failure
from excessive water tempera-
ture, power surge or internal fail-
ure
- Disconnect power, remove safe-
ty cover and dry control see
Figure 20
- Disconnect power, wait 10 sec.
and re-energize
- Continue troubleshooting to find
source of failure
- Replace control*
7. Power vent blower starts - Incorrect or broken wire connec-
tion
- Blower defective
- Air pressure switch stuck closed
- Correct wiring conditions
- Replace blower*
- Replace pressure switch*
8. Air pressure switch closes
(with sufficient vent draft) - Vent piping blocked or frozen
- Vent piping too long
- Blower wheel clogged
- Pressure tube pinched or broken
- Faulty pressure switch - Remove blockage
- Reduce vent length
- Clean wheel of dirt and debris
- Correct condition
- Replace pressure switch*
9.
Igniter energizes
- Switch opened from excessive
vent temperature due to over-fir-
ing, flue collector blockage or
insufficient air supply
- Faulty switch
- Check and adjust firing rate
- Remove blockages
- Correct air supply conditions
- Replace switch*
10.
High limit switch closed (with
normal operating temperatures)
- No power to igniter
- Flashing red LED light from:
- debris fallen on igniter or flame
rod
- igniter cracked or broken
- Air pressure switch open
- High limit switch open
- Check power supply to control
and igniter
- Disconnect power, wait for 10
sec. and re-energize
- Clear away debris
- Replace igniter
- See step 8
- See step 9
VIII) TROUBLESHOOTING GUIDE
SUPERFLUE TM
Note: Troubleshooting must be done by qualified service personnel familiar with the start up and check out procedure. See
also Sequence Of Operation (Figure 22).