DEFAULT MODE MANUAL MODE
Figure 5.8-1: Analog Outputs Screen
3. The unit should shut down and execute an IGNITION RETRY cycle by performing the
following steps:
(a) The unit will execute a 30 second re-ignition delay and display WAIT RETRY
PAUSE.
(b) The unit will then execute a standard ignition sequence and display WAIT
IGNITION RETRY.
4. The unit should perform two IGNITION RETRY cycles and then shut down on the third
successive ignition attempt. The unit will display Airflow Fault During Purge.
5. Re-enable the blower output drive voltage by performing the following steps:
(a) Go to: Main Menu → Diagnostics → Analog Outputs and Relays → Analog
Outputs.
(b) Press the Manual button; the Blower is now operational again.
(c) Press the CLEAR button; the unit should restart.
6. Once the unit has proved flame, turn off the blower again by repeating Step 1.
7. The Blower Proof switch will open and the blower should stop. The unit should shut down
and display Airflow Fault During Run.
8. Re-enable the blower output drive voltage by repeating Step 5, then press the CLEAR
button; the unit should restart.
9. Next, check the operation of the Blocked Inlet switch located on the inlet side of the
Air/Fuel Valve (Figure 5.8-2).
10. Ensure that the sheet metal panels are securely installed on the water heater and the unit is
running.
11. At the rear of the unit, partially block the air inlet (Figure 5.8-3) with a plywood sheet or metal
plate.
12. The unit should shut down and again display Airflow Fault During Run.
13. Unblock the air inlet and press the CLEAR button. The unit should restart.
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