Trouble Shooting! WARNING To avoid risk of electrical shock, personal injury, death, disconnect power to washer befe servicing, unless testing requires it. Troubleshooting Guide Maytag Neptune LED Gas Dryer Due to possibility of personal injury property damage, always contact an authized technician f servicing repair of this unit. Gas Valve coil opens weak point in coil opens Will Not Run when stressed under heated conditions. Will not start run: Clothes too wet due to insufficient spin out by All wires are hooked up to their cresponding washer. terminals. Will Not Shut Off Dryer is plugged in. Sht in Sens Circuit. Blown fuse circuit breaker. Check Membrane Pad. Do switch functional...do closed. Check Electronic Control Board. Start/Pause switch functional. Troubleshooting the electronic Control Board operational. Drive mot functional. control circuit: Blown thermal fuse. Check f miswiring of the electrical connect at the Mot runs/ tumbler will not turn: electronic control board. Does not shut off, then the problem is in the Belt off broken/damaged. electronic control unit. Disconnect the sens wire Idler tension spring too weak stretched. from the sens bar. If the dryer runs f about 20 Idler pulley jammed stuck. minutes, then shuts down the timer advances, Runs a few minutes and then stops: then the electronic control unit is good and the Lint buildup around drive mot. problem lies in the sens bar. Low voltage present. Check sens f continuity. If found, replace sens Blower impeller blocked in blower bar clean with alcohol. Some fabric softener housing. sheets will coat the sens bars. Drive mot - start switch contacts stuck closed. Noisy and/or Vibration Blows fuses trips circuit breaker: Thumping Check f loose tumbler baffle, rear The amperage readings are at 240 volts. One line tumbler roller(s) wn misaligned, out-of-round will be 24 amps and the other line will be 21 amps. tumbler high weld seam on tumbler. The neutral line will be at 3 amps. If the above amperages are present, then the house wiring, fuse Ticking Check f loose wire harness object box circuit breaker should be suspect. caught in blower wheel area. Shted heating element to housing. Scraping Check f front rear bulkhead felt seal Increct wiring a wire shting to ground. out of position wn tumbler front bearings. Drive mot winding shting to ground. Roaring Check f blower wheel rubbing on blower Will Not Dry housing bad mot bearings. Will not heat (mot runs): Popping squealing sound. Check f a sticky Hi-Limit trips easily is open. frayed belt. Regulating thermostat trips easily is open. Po Gas Ignition Membrane switch open. When the dryer is operated on a heat setting, the igniter Drive mot centrifugal start switch not allowing should be energized and burner will fire within 45 voltage to gas valve heating element. seconds at 120 VAC. The failure of a component in this Improper drying/clothes wrinkled/ rough system will usually be indicated by one of the following texture/long dry time: symptoms: Lint filter is not clean. The igniter does not glow. If the igniter does Restriction in exhaust. not heat up, remove power and check the Outside exhaust hood damper do stuck closed. following with an ohmmeter: Exhaust too long, too many elbows, flex ductwk Open flame sens installed. Open igniter Po makeup air available f the dryer. Shted booster coil Increct tumbler speed. Tumbler belt slipping. Open wiring Blower impeller bound; check f feign material in Igniter glows - No gas ignition. If the igniter blower area. heats up but the main burner flame is not Customer overloading dryer. ignited, remove power and using an ohmmeter, Check clothing labels f fabric content and cycle check the following: selected. Open secondary coil Open holding coil 2 Open wire harness The gas is ignited but the flame goes out. If a nmal ignition takes place and after a sht while the flame goes out, check f the following: Radiant sens contacts opening prematurely. Weak gas valve coil may open when stressed by higher temperatures. Key Press Special Test/Function Wrinkle release Display list of diagnostic codes. Then press Temperature (^) - 13 Key Dry Temp (^) - 15 Key Time (v) - 13 Key Time (-) - 15 Key Sens Dry Level (^) - 13 Key Very Dry (<) - 15 Key Start/Pause Control Configuration This Trouble Shooting guide illustrates the usage of software with the 13 and 15 key membrane switches. The section on Accessing Diagnostic Codes includes instruction f use with older control boards. 13 Key Membrane To sequence thru the diagnostic and help codes. Display revision number View current cycle temperature in Celsius Start pause cycle running but remain in diagnostic mode. System Check Mode While in Service Mode, pressing the Air Fluff and Signal (+) - 13 Key Membrane Air Fluff and Signal (+) - 15 Key Membrane keys f 3 seconds, will put the dryer into the System Check mode and "SC" will display. The following table lists the various functions based on the keys being pressed. 15 Key Membrane System Check Mode Table Key Pressed: Sens Dry Service Mode This mode provides Service Personnel the ability to verify the operation of the dryer. The Service Mode can be accessed in the middle of any dry cycle. While in the Service Mode, the Technician can start special diagnostic tests such as a System Check Mode, Membrane Pad Check, Display Software Version Number and display Diagnostic/Help code listings. Start/Pause Temperature (^) - 13 Key Dry Temp (^) - 15 Key To Enter Service Mode: Press Air Fluff and Time (^) - 13 Key Membrane. Air Fluff and Time (+) - 15 Key Membrane. keys f 3 seconds, until a beep is heard. The machine will now be in Service Mode and d will be displayed. Sens Dry Level (^) - 13 Key Very Dry (<) - 15 Key Exit Service Mode Press the OFF key to exit Service Mode. Diagnostic Tests The following table lists the various tests available while in the Service Mode. Function Perfmed Enable sens dry circuit (sense dry LED) when sht circuit is detected across the sens bars the nmal dry LED will turn on. Cycles the mot relay on/off. When the mot is running the start/pause LED is on. If mot is running, cycles the heater/gas valve on/off. When the heater is regular temp LED is on. View current cycle temperature in Celsius. Diagnostic Codes Code Description Membrane Pad Check The membrane check turns all the embedded LED s on. All the LED s can then be toggled off by pressing the key associated with the LED. 1 While in System Check Mode, pressing the Air Fluff and Sens Dry - 13 Key Air Fluff and Sens Dry - 15 Key 2 Thermist Open Sensed keys f 2 seconds, will start a Membrane Pad Switch Test. To exit the test at any point, press the same keys again f 2 seconds press the OFF key to exit Service Mode. Diagnostic Codes The Diagnostic Codes are identified when the severity level of the abnmality detected is higher and service may be required. When a problem with the dryer is detected a Diagnostic Code is assigned, and can be displayed. The Control Board will not log multiple same codes per cycle; however, it will log as many Diagnostics as possible f the machine to continue running. Accessing Diagnostic Codes with 13 Key Membrane Press Air Fluff and Time (^) to enter Service Mode. Press the Wrinkle Release key to access the Diagnostic Codes. Scroll through the Diagnostic Codes by pressing the Temperature (^) key. The first time the key is pressed the newest code will be displayed. Each additional key press shows the next code. Once all the codes have been displayed a d is displayed and the process repeats. If there are no Diagnostic Codes available, 00 will be displayed f the Diagnostic Code. Accessing Diagnostic Codes with 15 Key Membrane Press Air Fluff and Time (+) to enter Service Mode. Press the Wrinkle Release key to access the Diagnostic Codes. Scroll through the Diagnostic Codes by pressing the Temperature (^). The first time the key is pressed the newest code will be displayed. Each additional key press shows the next code. Once all the codes have been displayed a d is displayed and the process repeats. If there are no Diagnostic Codes available, 00 will be displayed f the Diagnostic Code. There will be no multiple occurrences of either a diagnostic code help code generated in the same cycle repted on the list. But if the same code occurs in repeated cycles, it will be registered. 3 Do Circuit Failure 4 Possible mot transist err 5 6 Not Used Non Volatile Memy 8 Stuck Key Action Taken The thermist resistance is very low, with a temperature > 175 degrees. The thermist resistance is very high Check f: Clogged lint screen. Restricted vent system. Failed thermist. Invalid state f me than 256 milliseconds If either mot transist is seen open shted during startup Problem Detected with integrity of parameters sted in EEPROM memy. A key is sensed to be pressed me than 75 seconds, the key shall be assumed to be stuck. Check f: - Low ambient temperature in room (Below 50oF/10oC). - Outside vent damper is stuck open in wintertime. Loose open wire terminals Check f: - Loose open wire terminals in Do Sense circuit. Check f: - Loose connections in mot circuit. - Run System Check Mode and check the mot relay function. - If relay functions, disregard the diagnostic code. If relay does not function, replace machine control board. Note: Unplug connect and touch probe of meter to the appropriate pin numbers. Meter will show infinity on open keys and continuity on closed keys. Membrane Pad Pin Number Pin Number Sens dry Time dry Time(^) 13 Key Time(+) 15 Key Time(v) 13 Key Time(-) 15 Key Temperature (^) 13 Key Dry Temp(^) 15 Key Dry Temp (v) 15 Key Sens Dry Level 13 Key Very Dry (<) 15 Key Damp Dry (>) 15 Key Wrinkle Release Wrinkle Prevent Air Fluff Start/Pause Signal(v) 13 Key Signal(-) 15 Key Off Signal(^) 13 Key Signal(+) 15 Key J7(10) J7(9) J7(10) J7(19) J7(9) J7(10) J7(16) J7(9) J7(16) J7(16) J7 Connect To clear the diagnostic code list press 4 BB1 Run membrane pad check and replace console w/membrane pad if necessary. Pin No. 1 Sens Bar f 3 seconds while in diagnostic mode. J3 Disregard Heater Relay Internal Output LI Board (input) Mot (input) Neutral (input) Do Sense Thermist Clearing Diagnostic Codes P1 Ribbon Harness Description Air Fluff and Wrinkle Release - 13 Key Air Fluff and Wrinkle Release - 15 Key 3 Dryer Thermist Sht Sensed Membrane Pad Continuity Checks Trigger Connect Pin Num P1 Connect Pin Num Voltage BB1(2) BB2(3) BB2(3) BB2(2) BB2(3) J4(1) J4(2) 5VDC J4(3) J4(4) 24VDC 5 Comments Do must be closed. Do must be closed Do must be open NTC 70 F = 10K ohms 150 F = 1754 ohms BB2 J4 Troubleshooting Guide Maytag Neptune LED Gas Dryer 63901310