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b. Phase 7 Non-coin (OPL) Microprocessor Controller (computer) Models
1) Upon completing installation of the replacement microprocessor controller (computer) board,
reestablish power to the dryer.
2) Start the drying cycle by pressing any of the preset cycles in letters A-F.
3) Verify that the applicable indicator lights on the microprocessor controller (computer) board are lit.
(Refer to the illustration below.)
2. For Models With Johnson Controls Direct Spark Ignition (DSI) Module (G760)
Theory Of Operation:
Start the drying cycle. When the gas burner ignites within the
chosen trial for ignition time (6-seconds), the flame sensor detects
gas burner flame and signals the DSI module to keep the gas
valve open...as long as there is a call for heat. The DSI module
will “LOCKOUT” if the gas burner flame is not sensed at the end
of the trial for ignition period. The trial for ignition period will be
repeated for a total of three (3) retries/trials (the initial try and two
[2] more retries/trials). If the flame is not sensed at the end of the
third retry/trial (inter-purge period of 30-seconds) the DSI module
will “LOCKOUT” (light emitting diode [L.E.D.] flashes).
A steady L.E.D. indicator indicates normal operation.
No L.E.D. indicator indicates a power or an internal failure has
occurred.