Assessments - 4, GPA: 4.3
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display on microprocessor controller (computer)... Open circuit breaker switch or blown fuse. Tripped blower motor overload. Faulty wiring connection. Faulty transformer. “Emergency Stop” (E-Stop) button is depressed. Faulty microprocessor controller (computer). Computer will not accept keypad entries... Keypad ribbon is not plugged into computer securely. Faulty keypad. Faulty microprocessor controller (computer). Dryer will not start, but computer L.E.D. indicators are on... Failed contactors. Failed arc suppressor board. Failed microprocessor controller (computer). Failed motors. Blower motor runs, burner is on, but tumbler will not turn... Broken, damaged or loose V-belt. Damaged or misadjusted drive wheels. Loose or broken pulley. Dryer operates but is taking too long to dry... Improperly programmed microprocessor controller (computer). An inadequate exhaust ductwork system. Restriction in exhaust system. Insufficient make-up air. Dirty or clogged lint screen. Washing machine extractors are not performing properly. The supply gas may have a low heating value, check with local gas supplier. Failed temperature sensor (temperature calibration is incorrect). Failed microprocessor controller (computer). Thermal overload for drive motor is tripping... Either an exceptionally low or high voltage supply. Motor bearing failure. Motor vents are blocked with lint. Failed motor. Failed overload. Insufficient make-up air. 18 American Dryer Corporation 450412-4 Overload for impellor (fan) motor is tripping... Either an exceptionally low or high voltage supply. Motor bearing failure. Motor vents are blocked with lint. Failed motor. Failed overload. Out of balance impellor (fan). Insufficient make-up air. Burner hi-limit safety thermostat is tripping... Insufficient exhaust ductwork, size or restriction in exhaust system. Insufficient make-up air. Lint screen needs cleaning. Damaged impellor. L.E.D. display reads “Temp Sensor Failure Check Temp Sensor Fuse.” or “Open Exhaust Temperature Probe.”... Check 1/8-amp fuse on microprocessor controller (computer). (Phase 6 units only.) Faulty microprocessor controller (computer) temperature sensor probe. Open circuit or short in either one of two wires leading from the sensor probe to the computer... Faulty microprocessor controller (computer). Dryer does not start. Display reads “main door” or “lint door” with an audio indication... Main door is open. Lint drawer is open. Faulty main door or lint door switch. Open circuit in either main door or lint drawer switch harnesses. Faulty 24 VAC transformer. There is excessive vibration coming from the tumbler... Tumbler is out of adjustment. Drive shaft or idler shaft is out of alignment. Faulty pillow block bearing or 4-inch (10.16 cm) rear wheel. Faulty tumbler wheel. Drive motor and shaft not aligned. Phase 6 OPL System Diagnostics ___ IMPORTANT: You must disconnect and lockout the electric supply and the gas supply or the steam supply before any covers or guards are removed from the machine to allow access for cleaning, adjusting, installation, or testing of any equipment per OSHA standards. All major circuits, including door, microprocessor temperature sensor, heat and motor circuits are monitored. The Phase 6 OPL microprocessor controller (computer) will inform the user, via the L.E.D. display of certain failure codes, along with indicators both in L.E.D. display and at the output of each relay (and door switch circuit) to easily identify failures. Diagnostic (L.E.D. Display) Failure Codes SAIL SWITCH FAIL – This routine will prevent start up on the machine unless the sail switch is in the correct position. If the sail switch is closed prior to start up the display will read “SAIL SWITCH FAIL” along with an audio indication. No AIRFLOW – If the sail switch opens during cycle operation the display will read “No AIRFLOW” along with an audio indication. The machine will continue to run with no heat for 3 minutes or until the temperature drops below 100. F (38. C). Upon failure the machine will shut down and display “No AIRFLOW” with an audio indication. bURNER SAFETY FAIL – Routine monitors the temperature above the burner. If the burner hi-limit switch opens the display will read “bURNER SAFETY FAIL.” The machine will run with no heat for 3 minutes or until the temperature drops below 100. F (38. C). Upon failure the machine will shut down and display “bURNER SAFETY FAIL” with an audio indication. dRUM SAFETY FAIL – This routine monitors the tumbler temperature if the tumbler hi-limit switch opens prior or during the cycle while the heat was on the machine will display “dRUM SAFETY FAIL.” The machine will continue to run with no heat for 3 minutes or until the temperature drops below 100. F (38. C). Upon failure the machine will shut down and display “dRUM SAFETY FAIL” with an audio indication. No HEAT – This routine monitors the burner ignition. If the burner misignites (does not light) the ignition module will check to see of...
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