FOR SERVICE TECHNICIAN S USE ONLY NOTE: This sheet contains important Technical Service Data.

Transcription

1 FO SEVICE TECHICIA S USE OL OTE: This sheet contains important Technical Service Data. W C Tech Sheet Do ot emove Or Destroy WAIG DAGE Electrical Shock Hazard Electrical Shock Hazard Only authorized technicians should perform diagnostic voltage measurements. Disconnect power before servicing. After performing voltage measurements, disconnect power before servicing. Failure to do so can result in death or electrical shock. eplace all parts and panels before operating. Failure to follow these instructions can result in death or electrical shock. Voltage Measurement Safety Information When performing live voltage measurements, you must do the following: Verify the controls are in the off position so that the appliance does not start when energized. Allow enough space to perform the voltage measurements without obstructions. Keep other people a safe distance away from the appliance to prevent potential injury. Always use the proper testing equipment. After voltage measurements, always disconnect power before servicing. SPECIFICATIOS Electrical Supply: Lower Spray Arm otation: (Under load) 60 Hz, 120 VAC 12 to 40 rpm Supply Water Flow ate: Upper Spray Arm otation: To fill 2 qt (1.9 L) in 27 seconds, 120 psi maximum, 20 psi minimum. 12 to 30 rpm Supply Water Temperature: 120 F (49 C) (Before starting a cycle, run water from sink faucet until hot.) EPAI KITS Water Charge: Vinyl Touch-up Kits: 0.9 gal. (3.5 L) Approximate (Blue), (White), (Gray) Control Assembly Control Assembly Push To elease And otate otate Pin 1 Connector Box Connector Brace (To emove Pinch Arms And otate) 4 Arms ast Connector Pinout Pin 1 Control Panel Snap Locks Into Place Buttons On Bottom Of Control Housing Slides Into Keyhole Slots On Control Panel To Support The Control Meter Check of Loads and Fuses Fuse Service and Diagnostic Checks: Wash/Drain Fuse Diagnostics: For wash/drain motors fuse and triac load fuse: Verify harness connections to all loads and control are made. Check stored failure code and/or operation of loads during service diagnostics cycle. If both the wash and drain motors fail to operate, motor fuse may be open. Check the fuse and replace control if fuse is open. If only wash or drain motor operates, fuse is OK. Use meter to measure non-operational motor's (3) phase resistances. If a phase is open (>1,000 ) or unequal to the others, motor is Fuse Diagnostics: bad. eplace motor. loads: dispenser, diverter motor, fill valve, lower spray arm (some models), water reuse tank (some models). If all phases are equal and within range (see Wash/Drain circuit), use meter to verify wiring harness continuity (<3 ) from control If any of the triac loads work, the triac fuse is OK. Diagnose and connection to motor phase. repair non-working triac loads. If harness continuity OK, control is bad. eplace If all triac loads fail to operate, triac fuse may be open. Check the fuse and replace control if fuse is open. If harness continuity open or intermittent, harness is bad. epair/ replace harness. OTE: Inspect and check resistances of all loads on fuse. If any loads are open, shorted or show evidence of overheating or pinched wires, replace loads and/or repair wires. 1

2 Wiring Diagram Schematic shown with door switch and all other normally-open contacts open. *Denotes energy-efficient components. Do not substitute. P ast 2.5 PCB Edge (Wide Out) P13 P1C 4-pin Mini Header (Wide Out) Control will not have all UI and Spray Arm connectors populated (Wide Out) 13V 5V L M Single Speed Drain Pump Motor Wide Data GD BK W P1A, P1B, AD P1C User Interface Connection Options Water Tank Valve (on some models) Spray Arm Sensor (on some models) Ferrite (1 Loop) Capacitive Touch Keyboards 4-pin P1-VCC P4-ef LED Displays 14-pin Smart UI Wide Interface 4-pin Spray Arm Sensor 4-pin ast 2.5 Vent Wax Motor (on some models) (Wide In) G G G G P M P1A VSM Drain Pump Motor P1B P1C To Connector P13 Thermostat (Hi-Limit) Heater Leakage (Float) Switch VSM SPA PUMP MOTO Fill Valve Diverter Motor Spray Arm Motor (on some models) Dispenser Door Switch Fan Motor 5V, 1W (on some models) Diverter Position Switch Contact M M M M O.W.I. (TC, Foam, and Turbidity Sensor) /W /W BK W Lt Lt Lt V V V V P4 P5 P6 P7 P8 Black Stripe P9 P10 ed Stripe P11 P Heater-L elay LV Drive Analog Input Digital Input Analog/Digital Input TC Input OPT Sig Foam Drive Turbo Drive LV Drive LV Drive Heater- elay Overfill / Leak Detection (Pilot elay Dectection) 5V 3V3 - Sensed (See detail diagram above) HW Enable Signal Inverter P1A, P1B, P1C, and P13 User Interface and Spray Arm Connectors Area Fuse Pilot elay Motor Fuse +13V Fuse Door Open Detection +13V LV Drive Load Sensing Buzzer LV Drive GD Power Supply LV Supply Lines (15V, 13V 5V, 3V3) (190.2 mm x mm) 2-sided F4 * CCU HV DC Bus PC Board 7¹ ₂" x 4¹ ₄" 2

3 ITEVAL CCLE, OPTIO, AD STATUS LEDs 1 HOU WASH OMAL STAT/ESUME UIG HI TEMP D OPTIO SAITIZED CLEA ALL OTHE CCLE, OPTIO AD STATUS LEDs ITEVAL TIME OTE 5 OTES 4,5,6 TOTAL TIME (MAXIMUM): 31:23 SOIL SESIG ITEVALS AD SESO CHECKS THEMISTO (TEMPEATUE SESO) CHECK ITEVAL OTE 5 OWI (SOIL SESO) CHECK ITEVALS OTE 6 (OTE: OWI HAS TEMISTO ILT I - SEE CHECK ABOVE) DIVETE POSITIO SESO CHECK OTE 3 LOWE SPA AM CHECK (IF PESET) OTE 10 LOADS PILOT ELA VET FILL WASH MOTO DETEGET/ISE AID DISPESE DIVETE DIVETE POSITIO LOWE SPA AM MOTO (IF PESET) OTE 10 DAI MOTO HEATE DC FA MOTO (IF PESET) OTE 7 WATE EUSE VALVE (IF PESET) OTE 7 Service Diagnostics Cycle otes: Service Diagnostics Cycles H 1H 1H 1H (1H) (1H) (1H) (1H) 1H 1H 1H 1H 1H 1H 1H M M M M (M) M (M) (M) M (M) M M M M M M M M M M STA STA STA STA STA STA STA STA STA STA STA STA STA STA STA STA STA STA STA STA STA STA STA STA STA STA STA STA STA STA U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U HIT HIT HIT HIT HIT HIT HIT HIT HIT HIT HIT HIT HIT HIT HIT HIT HIT HIT D D D (D) (D) (D) (D) D D D D D D D D D D SA (SA) CL CL CL CL CL (CL) (CL) (CL) (CL) (CL) CL CL ALL 0:06 0:01 1:21 1:21 1:21 1:21 0:10 0:02 2:00 2:30 2:00 0:20 0:10 2:00 CUSTOME EO 1 CUSTOME EO 2 CUSTOME EO 3 CUSTOME EO 4 1:30 0:38 0:05 0:02 0:13 0:05 TH PLT PLT PLT PLT PLT PLT PLT PLT PLT PLT PLT PLT PLT PLT PLT PLT PLT PLT PLT PLT PLT PLT PLT VT VT VT VT VT VT VT VT VT VT VT VT VT VT VT VT VT VT VT VT VT VT VT FIL FIL FIL FIL FIL WSH WSH WSH WSH WSH WSH WSH WSH DSP DIV (DIV) DIV (DIV) (DIV) (DIV) FO FO UP UP UP UP UP O O UP UP TZ LOW LOW LOW (D) (D) D UV UV UV OWI FA 0:45 2:00 0:30 1:00 DIV OWI FA FA 0:30 4:00 2:00 0:06 2:30 1:21 LSA LSA (D) D HT HT FA 1:21 SEVICE EO 1 SEVICE EO OTES OWI S T A D B S T A D B 1 To invoke the Diagnostics Cycle, perform the following while in standby: Press any 3 keys in the sequence with no more than 1 second between key presses. The Service Diagnostics Cycle will start when the door is closed. To rapid advance 1 interval at a time, press the Start/esume apid advance may skip sensor checks as some checks require 2 complete intervals. OTE: While you are in the Diagnostic Cycle, the Start/esume feature is turned off (for example, Auto esume after door interrupts) and the Start/esume key becomes an interval advance Invoking Service Diagnostics Cycle clears all status and last run information from memory and restores defaults. It also forces the next cycle to be a sensor calibration cycle. Wash and drain motors will pulsate on and off. Last run cycles and options returned to default. Last run Delay returns to the lowest delay increment. Calibration cycle may force an extra rinse to occur prior to final rinse (to assure clear water), then calibrates the OWI and the fill amount during the final rinse. Operating state returns to Standby upon completing or terminating the Service Diagnostics Cycle. 2 Turn on all LEDs immediately upon receiving entry sequence (even if door is open) and throughout this first interval as a display test. 3 Diverter will be on continuously in interval 11. In all other diverter intervals, diverter will be on only until it reaches the intended position for that interval. 4 Press Hi Temp key in this interval to clear customer error history. 5 Thermistor (temperature sensor) checks - turn clean LED on if thermistor is in its normal temperature range (32 F to 167 F [0 C to 75 C]). Turn sanitized LED on if fill temperature is above 85 F (30 C). 6 OWI (optical soil sensor) checks: Check OWI sensor for the presence of water during the 5-second pause in interval 12 and turn on the in interval 11 if water detected. Check OWI sensor for presence of bulk soil during pause interval 9 and turn on the in interval 8 if bulk soil detected. Drain until OWI sensor sees the presence of air or a maximum of 1:52 during interval 5 and turn on the in interval 4 if air detected. 7 DC Fan Motor is on during upper rack washing intervals 8 Turn off all LEDs during pause prior to displaying error codes. 9 Pause to allow for cold first fill detection. 10 Local spray arm (LSA) models identified by finger-shaped sensor in tub, protruding from bottom left side of sump. Check for LSA motor and sensor during interval 6 according to detail below or look for error code (F9E4) at end of service cycle. ITEVAL 6 (4 MIUTE LOWE WASH): DIAGOSTIC DETAILS FO LSA MODELS Minute #1: LSA Minute #2: LSA Minute #3: LSA Minute #4: LSA rotates CCW rotates CW rotates CCW rotates CW LSA motor and sensor status indication given during 3rd and 4th minute of interval. lit to indicate LSA motor status good. lit to indicate LSA sensor status good. 11 These intervals are skipped if not equipped with water reuse tank. If equipped with tank, cycle will empty the tub and tank, then fill the tank and hold water for 2 minutes. The tank then drains back into the tub and proceeds with the normal service cycle. 12 Drain sequence includes priming: 5 seconds on, 2 seconds off, 5 seconds on, 2 seconds off, followed by remainder of drain time. To quickly advance through customer cycles, invoke the apid Advance mode by pressing HIGH TEMP - HEATED D - HIGH TEMP - HEATED D, after starting the cycle. Then press STAT/ESUME to advance through cycle intervals. Customer Cycle Operation: 3 OTE: apid Advance mode is automatically enabled in the Service Diagnostic cycle, but must be manually invoked in customer cycles.

4 Meter Check Of Loads And Fuses. Load must be connected for triac to operate correctly. Meter checks are best made at the Control Pinout The following individual circuits are for use in diagnoses. Do not continue with the diagnosis of the appliance if a fuse is blown, a circuit breaker is tripped, or if there is less than a 120-volt power supply at the wall outlet. Dishwasher Strip Circuits Perform resistance checks. To check resistance of a component, disconnect harness leads rst. Door Switch (To Heater) Switch Door K402 esistance Switch Heater () elay Closed<3Ω Sensing Open>3Ω Input 13V V V P9-6 P9-5 Door Switch (To Wash Motor, Vent, and Loads) Micro Pin K400 Pilot (L1) elay Micro Pin (To Heater) K401 Heater (L1) elay Micro Pin (To Variable Speed Contoller or Single Speed Drain Motor) K300 Micro Pin (To Variable Speed Contoller on Some Models K301 Micro Pin Wash/Drain Variable Speed Wash Motor Wash/Drain - On Some Models Variable Speed Wash Motor Variable Speed Controller P5-1 P5-2 P5-3 P5-4 P5-5 P5-6 Pin 3 Pin 2 Pin 1 Pin 3 Pin 2 Pin 1 10Ω - 20Ω Pin to Pin 80Ω Ω Pin to Pin L1 P4-2 Variable Speed Controller Motor Fuse K400 K300 P5-1 P5-2 P5-3 P5-6 Pin 3 Pin 2 Pin 1 P5-5 P4-1 10Ω - 20Ω Pin to Pin Variable Speed Drain Motor Single Speed Drain Motor 15Ω - 60Ω, 120 V 60 Hz, 60 Watts Electronic Control 4

5 Water Heating/Heat Dry and Water Sensing with O.W.I. Sensor (Water/Air/Soil/Temperature) Pump is washing and control monitors temperature during water heating periods (see Wash/Drain and Water Heating/Heat dry and Water Sensing with O.W.I Sensor (Water/Air/Temperature) circuits). Heater L1 BK.C. P4-2 P4-3 / / /W P4-4 P4-1 W K401 Hi-Limit Heater Element K1 Heater L1 elay Thermostat 8Ω - 30Ω Heater elay (Also see Door Opens 120 V, 60 Hz (Also see Door Switch Circuit) 207 F F 785 W Wet Switch Circuit) (97 C C) 500 W Dry P12-6 P12-5 P12-4 P12-3 P12-2 P12-1 Pin 1 Pin 2 Pin 3 Pin 4 Pin 5 Pin 6 Turbidity Drive Foam Drive Opt Sig 3.3V ef TC O.W.I. Sensor Temperature: TC Thermistor 46KΩ - 52KΩ at 77 F (25 C) 11KΩ - 13KΩ at 140 F (60 C) Measure TC resistance at P12-1 and P12-3 connector with connector disconnected from the control Fill L1 BK Float (In normal position, Float Switch holds switch closed.) Input Fuse P4-2 P6-1 P6-3 P6-4 P6-6 P4-1 W K400 Pin 3 Pin 1 Pin 3 Pin 1 Pilot L1 elay Fill Valve (Also see Door 890Ω - 1,600Ω Switch Circuit) Overfill Switch 120V, 60 Hz, 6W Closed (ormal) <3Ω Electronic Open (Overfill) >3Ω Control o test pad on P6-4. ecommend using test pad on P6-3 for P6-4. Dispenser (Detergent and inse Aid) 7 Diverter Valve Diverter Motor L1 BK Fuse P4-2 K400 Pilot L1 elay (Also see Door Switch Circuit) Test pad on P7-4 might crowd P7-6. ecommend using test pad on P10-1. P7-4 P7-6 P4-1 Pin 3 Pin 1 P10-1 Diverter Valve Motor 1,400Ω - 1,600Ω 120V, 60 Hz, 3W W Diverter Sensor Switch open > 3Ω Switch closed < 3Ω Sensor Input Switch closes momentarily and then reopens as the diverter reaches each potential diverter position. P11-4 P11-3 5V Diverter Position Switch 5

6 Controlled Lower Spray Arm (on some models) Drying For Heated Dry, Heater is also running. See Heater circuit under Water Heating/Heat dry and Water Sensing with O.W.I Sensor (Water/Air/Temperature). Water Tank Valve (on some models) Water Tank Valve (on some models) L1 BK Fuse P4-2 P8-4 K400 Pin 2 Pin 1 Pilot L1 elay (Also see Door P10-1 Switch Circuit) Test pad on P8-4 might crowd P8-6. ecommend using test pad on P10-1. Water Tank Valve Test for 120V under load 60 Hz, 6 W P8-6 P4-1 W 6

7 FO SEVICE TECHICIA S USE OL Entry sequence: Press any 3 keys in the sequence with no more than 1 second between key presses. OTE: Some models have replaced the Clean LED with Complete. DISPLA TEST - ALL LEDs O ITEVAL 31 1 SECOD PAUSE - ALL LEDs OFF ITEVAL 30 EO 1 - MOST ECET ITEVAL 29 CLEA FUCTIO Pause CLEA If no error, 2 sec. CLEA FUCTIO Pause CLEA If no error, POBLEM If no error, OTE: Once the error codes are extracted, refer to Service s Table to diagnose and correctly resolve root cause condition. Service Diagnostics with s Pause 5 sec. epeat 3 times unless advanced by Start EO 2 ITEVAL 28 2 sec. CLEA FUCTIO Pause CLEA If no error, POBLEM If no error, Pause 5 sec. epeat 3 times unless advanced by Start EO 3 ITEVAL 27 2 sec. POBLEM If no error, Pause 5 sec. epeat 3 times unless advanced by Start EO 4 - OLDEST ITEVAL 26 CLEA FUCTIO Pause CLEA If no error, 2 sec. POBLEM If no error, 10 seconds pause Hi Temp LED will be on. Press Hi Temp key to clear errors. Hi Temp LED will blink twice to indicate errors have been cleared. Service Diagnostics Cycle Turns on loads and checks sensors. Pause 5 sec. epeat 3 times unless advanced by Start ITEVAL 25 ITEVAL 24-3 SEVICE CCLE EO 1 ITEVAL 2 CLEA FUCTIO Pause CLEA If no error, 2 sec. POBLEM If no error, Pause 5 sec. epeat 3 times unless advanced by Start SEVICE CCLE EO 2 ITEVAL 1 CLEA FUCTIO Pause CLEA If no error, 2 sec. POBLEM If no error, Pause 5 sec. epeat 3 times unless advanced by Start 7 Service s Table Example: 6-1 means Inlet Water function, Low/o Water Function What to Check 1-Control 1- Control detected Pilot Stuck K400 pilot relay stuck On closed. 2. Check all loads on K400 pilot relay for shorts. 3. eplace control and all shorted components. 2- Damaged or Control corrupted memory on Software control board. 2. eplace control board. Issue Incompatible software components inside micro User Stuck Key Interface 2- o esponse From UI Control detected stuck key(s) in keypad or keypad connection. OTE: The stuck key(s) will be ignored and an error recorded to service history, but no alert to customer. 1. User interface can not communicate with main Loose user interface connection. 2. Wrong control installed. Check responsiveness of each 1. If some keys do not respond, then: - - Disassemble door and disconnect keypad connection from control or LCD display module. - Verify all other connections to control are made. - eassemble door, but do not close door. - Plug in dishwasher or reconnect power. - Wait at least 7 seconds for control to power up completely. - Close dishwasher door and monitor control response: A. If control is OK (no longer sees stuck keys with keypad unplugged), it will respond by turning on the drain motor for 2 minutes. eplace keypad and console. B. If control is not OK (still sees stuck keys with keypad unplugged), it will not turn on drain motor. Wait for at least 10 seconds. If still no drain response, then replace control or LCD display module (whichever one the keypad was connected to). 2. If all keys appear OK or intermittent, and keypad is capacitive touch type, then: - Verify tub brackets are screwed to underside of countertop and not hanging over keys (if screw head too close, relocate screw to alternate hole). - Check for evidence of moisture or debris on the surface of the keys. If evident, clean and instruct customer about keeping surface clean. - Check error code history for Vent 10-2 and/or Fan 10-3 as potential causes of condensation on user interface. 2. Check connections between LCD display module and P1C connector on the If connection(s) loose, then reconnect. 3. Check for 5VDC from P1C- 2 to P1C-4. If no voltage at control, remove power and replace main control board. Verify correct control is installed. Control should have no connector present at P1A. If incorrect, disconnect power and replace

8 Function 3- Thermistor/ OWI 4- Wash Motor 5- Door Switch 1- Open - Open connector or 1. Check operation of component in temperature sensor in Service Temperature Sensing Diagnostics cycle. circuit Open or faulty temperature sensor. 3. Check all components and - Faulty temperature connections in the sensor input on Temperature Sensing circuit with meter. Fix/replace open connection/part. 2-Shorted - Incoming water 1. Check incoming water temperature above temperature. 167 F (75 C). 2. Check operation of - Shorted connection temperature sensor in Service or component in Diagnostics cycle. Temperature Sensing 3. circuit. - Shorted or faulty 4. Check all components and temperature sensor. connections in the - Faulty temperature Temperature Sensing circuit sensor input on with meter. Fix/replace open connection/part. See OWI sensor strip circuit OWI failure. Failed Calibration 2. emove OWI and check lens surface. Lens should be clear and surface should be free of debris and scratches. Clean lens or replace owi as needed. 3. Check all connections in soil sensing circuit with meter, fix/replace bad connection / part. OTE: un diagnostics cycle after installing new OWI to force calibration on next 4- Motor Failure 1- Door Stuck Open 2. Drain hose check valve not sealing. 1. Loose connection in Wash Motor circuit and/or open wash motor. 2. Motor fuse on control open. 3. Wash Motor Drive circuit on the 4. Wash motor. 1. Door was not latched within 3 seconds of pressing the Start/ esume 2. Loose connection in Door Switch circuit and/or door switch contacts stuck open and/or door switch contacts stuck open and/or door switch not making contact: - Sloppy door latch assembly, which can be aggravated by high door closure force, keeping strike plate from fully seating. - Door switch (high resistance). 3. If none of the above. What to Check regular wash cycle. Dirty water backs into dishwasher after draining. 1. Disconnect drain hose at plumbing connection. 2. Elevate hose above dishwasher and fill with water. If water flows into dishwasher, replace entire drain loop. Install as high as possible and attach to underside of countertop if possible. 2. Check all connections in Wash Motor circuit with meter. Fix/replace open connection / part. efer to Meter Check of Instruct customer. efer to Use and Care Guide. 1. Check strike plate and door closure force. Verify door seal is seated properly. Check for interference between dish racks and door. Try bending strike plate down for better engagement Check door switch contacts and all connections in the Door Switch circuit with meter while opening and closing the door latch. - If high resistance with door closed, check/fix loose connections. 4. Measure resistance of door switch contacts while checking mechanical operation of latch assembly. Check for broken plastic pieces on latch assembly. eplace latch if faulty. 1. With door open, verify 13 VDC present across P9-5 and P If no voltage present, unplug dishwasher or disconnect power and replace Function 5- Door Switch (cont.) 2- Door Stuck Closed 6- Inlet Water 1- Low/o Water (Mechanical ) 2- Fill Valve Electrical 3- Suds/Air in Pump 4- Float Switch Open Control programmed to not start if it suspects the door switch is stuck closed. Control looks for the door switch to open between cycles. - Customer didn t open the door between cycles or door switch contacts stuck closed. 1. o water to dishwasher. 2. Bowls or pots loaded or flipped and captured wash water. 3. Drain loop detached from tub and/or improper drain connection. 1. Open and close door and then press Start/esume If it works now, instruct customer to open door between cycles Measure resistance of door switch contacts while checking mechanical operation of latch assembly. Verify water supply is turned on and supply line is adequate. Instruct customer on loading. efer to Use and Care Guide. Check for water siphoning out of unit: 1. Allow dishwasher to complete normal fill. 2. Drain for 5-10 seconds by pressing CACEL/DAI. 3. Open door and confirm water does not siphon out of unit. If it does, confirm drain loop is attached to side of dishwasher and drain hose is connected to a drain at least 20" (50.8 cm) off the floor. 4. Water leaking from Check for leaks under dishwasher. dishwasher. 5. Fill valve or water line plugged with debris. 6. Overfill switch stuck in Overfill position and/or dishwasher not level. 7. Fill valve electrical 8. Water tank valve stuck open. 1. Loose connection in Fill Valve circuit and/or open fill valve solenoid. 2. Open fuse on control to fill valve. 3. Fill Valve Drive circuit on the Turn off water supply to dishwasher, disconnect water line to inlet valve, and inspect/ clean the inlet screen of fill valve, and reconnect water. Check other error codes to see if 6-4 also occurred. See 6-4. Check other error codes to see if 6-2 also occurred. See 6-2. Check other error codes to see if 6-10 also occured. See disconnect power and check resistances of fill valve solenoid and all connections in the Fill circuit with meter. -Fix/replace open connection/ part. efer to Meter Check of 1. Too many suds. 1. Allow unit to fill and wash for 1 minute. Open door and check for excessive sudsing. 2. Confirm using proper dishwasher detergent, not hand detergent. 3. Check for excessive rinse aid leakage. 2. Bowls or pots loaded or flipped and captured wash water. Instruct customer on loading. efer to Use and Care Guide. 3. Water leaking from Check for leaks under dishwasher. dishwasher. 4. Diverter disk in sump is missing. 1. Overfill switch stuck in Overfill (open) position and/ or dishwasher not level. 2. Drain hose check valve not sealing. What to Check emove lower spray arm, TurboZone assembly, rear feed tube, and outlet cover and verify whether the red diverter disk is installed. emove any items stuck under the float. Verify that the float moves freely and you hear the click of the switch contacts. Check/adjust level of the dishwasher. Water backs into dishwasher after draining and elevates water level. 1. Disconnect drain hose at plumbing connection. 2. Elevate hose above dishwasher and fill with water. If water flows into dishwasher, replace entire drain loop. Install as high as possible and attach to underside of countertop if possible. 8

9 Function 6-4- Inlet Water Float (cont.) Switch Open (cont.) 7- Heating 9 - Water Tank Valve ot Functioning 10 - Water Tank Valve Stuck 1- o Heat 2- Heater Stuck On 3. Fill valve triac on control shorted. 4. Fill valve mechanically stuck open. If still filling while door is open, fill valve is mechanically stuck open (see below). If not filling with the door open, check operation in Service Diagnostics Test Cycle. Advance service cycle until detergent dispenser opens. Fill valve should be off. Listen to see if dishwasher is still filling. If still filling, unplug dishwasher or disconnect power and replace Confirm dishwasher fills while the door is open. If yes, unplug dishwasher or disconnect power, turn off water to dishwasher, replace fill valve, and turn water back on. 5. Too many suds. 1. Allow unit to fill and wash for 1 minute. Open door and check for excessive sudsing. 2. Instruct customer if using improper dishwasher detergent (hand detergent). 3. Disconnect power and replace dispenser if see excessive rinse aid leakage. 6. Open fuse to fill valve and other triac loads. 1. Loose connection in Valve circuit and/or open water valve solonoid. efer to Meter Check of disconnect power and check resistances of water reuse valve solonoid and all connections in the Water euse Valve circuit with meter. -Fix/replace open connection/ part. 2. Open fuse on efer to Meter Check of control to water reuse valve. 3. Water euse Valve Drive circuit on the 1. Contaminant in valve. 2. Valve mechanically stuck/electrically faulty. 3. euse tank or reuse tank hose leaking. 1. Control programmed to disable heater, but continue running cycles, if it detects a water heating 2. Heater circuit problem: - Open in heater. - Open connection or component in Heater circuit. 3. Heater Drive circuit on the Heater Drive circuit on the What to Check Fill reuse tank by completing normal cycle. eplace valve if tank did not fill. Start another normal cycle and wait for wash to start. eplace valve if tank not empty. un normal cycle looking for leaks. Fix/replace tank/hose to repair leak. unning diagnostics clears the control and allows the heater to turn on again. Water heating problem must be corrected, or the control will disable the heater again. See Heater circuit problem below. 2. Measure resistance of heater and all components and connections in Water Heating circuit/heat Dry circuit. Fix/replace open connection/part. 2. Inspect heater and connections for overheating/ shorting. If evidence of overheating or shorts exists, replace. Function 8- Draining 9- Diverter 1-1. Obstructed drain Slow Drain hose or path. 4- Drain Motor Electrical 1- Diverter Can't Find Position 2- Diverter Stuck On 3- Diverter Disk Missing 4- Lower Spray Arm 2. Drain Pump impeller fractured. 2. Check for blockages from sump check valve to customer s plumbing. Potential items: plugged garbage disposal or plug not knocked out, drain loop check valve stuck and/or plugged hoses. drain pump. 1. Loose connection in Drain Motor circuit disconnect power and check and/or open drain resistances of drain motor motor winding. winding and all connections in the drain circuit. Fix/replace 2. Debris stuck in drain motor impeller. 3. Open fuse on control to drain motor. 4. Drain Motor Drive circuit on the 5. Drain motor. 1. Corroded or loose connection in Diverter Sensor/ Motor circuit. 2. Mechanical binding of diverter shaft/disk. 3. Open fuse on control to diverter motor. 4. Diverter Motor Drive circuit on the Diverter Drive circuit on the Control detected diverter disk in sump is missing. What to Check open connection/part emove drain motor and dislodge debris from impeller. efer to Meter Check of 1. Check operation in service diagnostics cycle. listen for cam clicking as it rotates or inspect shaft with mirror to see if rotating during diverter interval. If rotating, then likely the sensor circuit. 2. disconnect power and check connections/parts in diverter sensor and motor circuit with meter. Fix/replace connections/parts. 3. Inspect diverter sensor for evidence of water or contaminants. If yes, replace. Check operation of diverter motor during diagnostics. Inspect diverter shaft with mirror if motor appears to be on (hums, vibrates) but see limited rotation. Then replace diverter and seal. efer to Meter Check of 2. Inspect diverter motor and connections for overheating/ shorting. If evidence of overheating/shorting exists, replace. emove lower spray arm, TurboZone assembly, rear feed tube, and outlet cover and verify the round diverter disk is installed. 1. Mechanical 1. Check for and remove any binding or blocking of blockage of lower spray arm spray arm. (utensils, pot handles). 2. Corroded or loose 2. un the Service Diagnostics connection in Spray Cycle and check for the LSA Arm Sensor/Motor operation/fault detection. circuit. efer to ote 10 in the Service Diagnostics Cycle 3. Open fuse on section. control to spray arm If failure still exists then: motor. 3. Disconnect power from the 4. Spray arm drive unit and check wiring circuit on the connection or damage at controlled lower spray arm motor and sensor. 4. efer to Meter Check of eplace control if open. 5. Check for open or shorted LSA motor winding resistance. eplace diverter module. 9

10 Function 10- Other 1- Dispenser Electrical 2- Vent Wax Motor Electrical (ot All Models) 1. Loose connection in Dispenser circuit and/or open dispenser solenoid. Troubleshooting Guide disconnect power and check resistances of dispenser solenoid or wax motor and all connections in the Dispenser circuit. Fix/replace open connection/part. efer to Meter Check of 2. Open fuse on control to dispenser. 3. Dispenser Drive circuit on the 1. Loose connection in Vent circuit and/or disconnect power and check open vent wax motor. resistances of vent wax motor and all connections in the Vent circuit. Fix/replace open connection/parts. 2. Open fuse on control to vent. 3. Vent Drive Circuit on the 3-1. Loose connection Drying Fan in Fan circuit, and/or (On open fan motor. Models With Fan) 2. Fan Drive circuit on the efer to Meter Check of disconnect power and check resistances of fan motor and all connections in the Fan circuit. Fix/replace open connections or fan. OTES: For resistance checks, refer to Dishwasher Strip Circuits section. For checking operation with diagnostics, refer to Service Diagnostics Cycles section. Customer Description Potential Check Flashes Won t un or Power Up ( Dead Keypad/ Console) - o operation - o keypad response - o LEDs or display Won t un and LED for Start/ esume Key is Blinking Slowly Control programmed with self diagnostics. 1. o power to unit or bad connection. 2. Loose connections in dishwasher power-up circuit or between keypad(s) and 3. Model has an LCD display and the control has been exchanged for one that is not compatible with the LCD display module. 4. Control detected door switch problem 5. User interface or 1. By design, if the door is opened or power is interrupted during a cycle, the user must press the Start/ esume key to resume operation. What to Check ead function code being displayed to customer and refer to function codes portion of error code table. un service diagnostics test cycle to read full history of error codes. Check fuses, circuit breakers, and junction box connections. 2. Check continuity of power connections to control and connections between keypad(s) and Verify correct control is installed. Control should have no 4-pin user interface connector present at P1A if it is configured for an LCD model. disconnect power and replace table. Disassemble door and inspect control power connector (P4) and adjacent PC board for damage. eplace as needed. 2. Table section for stuck key (2-1). un the diagnostic check, item (1). -If drain motor turns on, control is OK. eplace the UI. -If drain motor does not turn on, replace 3. Inspect UI cable for loose or damaged wiring. eplace as needed. 4. Inspect UI Assembly for damage or contamination. eplace UI as needed. Instruct customer. efer to Use and Care Guide. elated (s) Customer Description Won t un and LED for Start/ esume Key is Blinking Slowly (cont.) Won't un and Led Above Key is Flashing apidly and Continuously Won t un and All LEDs On Won t Start and Start/ esume key LED Flashes 3 Times When Start/ esume Key is Pressed Won t Accept Key Presses and Control Lock LED On One or More Keys Won t espond (But Some Keys Work) O Unusual LED/ Display/Key Behavior Dishwasher Beeps Constantly (for Models with Beepers) Potential 2. Start/esume key not responding. 3. Control detected door switch Stuck key/short circuit(s) in keypad or in control's input lines that read the keys. Software or hardware incompatibility problem with Control looks for door to open between cycles. - Customer has not opened door since last cycle. - Door switch contacts stuck closed. Control Lockout feature accidentally turned on by customer. 1. Stuck key or short circuit(s) in keypad or in control s input lines that read the keys. 2. Capacitive touch keypad adhesive coming loose from console. 3. Loose connections between keypad and control and/ or bent or contaminated connector pins. 4. Excessive condensation on user interface parts due to vent and/or fan 5. Defective user interface. 1. User opened door during cycle and closed door without pressing Start/esume to resume cycle. 2. ormal beeper operation is excessive to customer. 3. Door not opened between the cycles. Long Cycles 1. As part of and/or Stuck normal in Certain operation, the Part of Cycle dishwasher pauses 2 or 3 times during the cycle for thermal holds and advances once temperature is met. Check See One or More Keys Won t espond. Instruct customer. efer to Use and Care Guide (press and hold Control Lock key 5 seconds to turn On/Off). 2. Inspect keypad board for separation from console. eplace keypad and console if separation is seen. 2. Inspect connections in user interface circuits. econnect loose connections. eplace part(s) if pins are damaged or contaminated. Check error history for 10-2 vent error or 10-3 fan error. Verify presence of vent current if model has a vent wax motor. efer to Leaks or Drips On Cabinet or Floor in the Troubleshooting Guide section. 2. eplace user interface console assembly. Instruct customer. Dishwasher control is designed to beep if dishwasher is in Cycle Interrupt mode with door latched. Control will stop beeping when door is opened and/or Start/esume key is pressed to resume cycle. Instruct customer how to turn beeper off and on. Press and hold Hi Temp key for 3 seconds (tone sounds). Instruct customer. control will beep if new cycle started and the dishwasher door was not opened since the last completed cycle. Instruct customer. Explain thermal holds and how the cycle pauses when they occur. Explain how today's more energy efficient dishwashers run longer cycles but use less energy overall. elated (s) ,

11 Customer Description Potential Long Cycles 2. OWI soil and/or Stuck sensor picking in Certain high soil cycle Part of Cycle too often. (cont.) LEDs or Displays un For Short Time (but o Loads unning) and then Shuts Off Can Start a Cycle, but Only uns for a Short Time - Cycle Does ot Complete ( or Complete May Blink) Will ot Drain, or Excess Water Left in Dishwasher. OTE: Check History. If o s for Electrical s, is Mechanical. Do ot eplace Control. Lower Spray Arm Blocking the Filter Cup emoval. (Controlled otation Lower Spray Arm Models). 3. A water heating problem could cause long cycles but will typically cause a water heating fault. 4. Heater takes a long time to heat water with low voltage. 5. Incoming Incoming water under 65 F (18 C). 6. Suds or air in pump requires repeated wash periods. Check 1. un Service Diagnostics cycle to check if OWI is showing high soil with clear water. 2. Check lens surface. Clean if needed eplace OWI and run diagnostics after installing new OWI to force calibration on next wash cycle. Check for at least 100 VAC at power source. 1. Be sure dishwasher is connected to the hot water supply. 2. Confirm temperature at sink (recommend 120 F [49 C]). Instruct customer to run water at sink before running dishwasher. 3. disconnect power and check all connections and measure resistance in Temperature Sensing circuit. eplace OWI if resistance is high. 7. OWI or TC sensor 1. Unit is in Sales Demo mode. 2. Open F8 fuse (wash motor) or F9 fuse (triac load) on control disabled loads. 1. Control canceled cycle due to error detected with wash motor, drain motor, low water, or suds. 2. Unit in Sales Demo mode. 1. Drain loop check valve not sealing. 2. Customer misunderstands water level after drain. 3. Draining 1. Door opened while lower spray arm moving. 2. Corroded or loose connection in spray arm sensor/motor circuit causing LSA to stop somewhere other than home position (home position = LSA roughly 5 clockwise from 12 o'clock. Check operation of Cancel If there is no Cancel LED response to multiple Cancel key presses, the control is likely in Sales Demo mode. un Service Diagnostics cycle to clear Demo mode. efer to Meter Check of Loads and Fuses section. un Service Diagnostics cycle to clear demo mode. 1. Disconnect drain hose at plumbing connection. 2. Elevate hose above dishwasher and fill with water. If water flows into dishwasher, replace entire drain loop. Install as high as possible. Instruct customer. Sump will normally have about 1" (2.4 cm) of water remaining in filter cup hole after cycle. Instruct customer controlled lower spray arm power is cut off when door is opened. Disconnect power and check connection at contolled lower spray arm motor and sensor at the Inspect connectors for water and contamination and replace as needed. un the service diagnostic cycle and check for the LSA motor/ sensor operation ( Service Diagnostics Cycles section, ote 10). elated (s) , , 6-1, 8-3, , Customer Description Detergent ot Dispensing or Detergent Left In Dispenser OTE: Check error history. If no error codes for electrical problems, problem is mechanical. Do not replace Poor Wash Film or Spots on Glasses and/or Dishes Potential 1. Item in lower rack blocked lid or blocked spray of water to dispenser. 2. Mechanical binding of dispenser lid. 3. Lid latch binding due to excess detergent in mechanism. 4. Dispenser electrical 5. Control canceled cycle due to error detected with wash motor, drain motor, low water, or suds. 1. Cycle selection of customer not appropriate for dish load. 2. Plugged or damaged screens. 3. Spray arms not rotating or plugged. 4. Poor wash due to draining, dispensing, and/ or temperature problems. 5. Control canceled cycle due to error detected with wash motor, drain motor, low water, or suds. 6. Soil sensor 7. Diverter 8. Diverter disk missing. 9. Heating 10. Softener problem (on some models). 1. Customer not using rinse aid and/or Heated Dry. 2. inse aid dispenser 3. Hard water leaving film on dishes. Check Instruct customer on proper dish loading. 2. Check/replace dispenser. Instruct customer on proper dispenser filling. Instruct customer on cycle selection. ecommend High Temp option for wash performance boost. Inspect following three screens: - Filter cup coarse screen - Filter cup fine screen - Sump fine screen 1. Check arm rotation. If arms are blocked by dish item, instruct customer. Also check for correct upper spray arm alignment with docking station located on feed tube back wall. 2. Check nozzles. If they are plugged, clean nozzles and confirm filters installed properly. 3. Controlled lower spray arm motor failed. Check spray arm moving in both directions during diagnostics cycle. See Will ot Drain or Excess Water Left in Unit or Detergent ot Dispensing or Detergent Left in Dispenser or details on temperature sensing in Long Cycles and/or Stuck in Certain Part of Cycle. OTE: Even if no error code recorded, confirm OWI passes all OWI checks in service diagnostics cycle and see checks for 3-3. emove outlet cover and inspect for red plastic disk through holes in outlet. Install new disk if missing. Check rinse aid gauge level on dispenser. Instruct customer how to fill and monitor add/use rinse aid. Check water hardness. If hard, instruct customer to use maximum detergent or try pouring ¹ ₄ cup (60 ml) of Glass Magic into bottom of dishwasher. Also recommend the 1 H Wash cycle. For models with water softener: Check for Add Salt LED at the end of cycle. If on, add salt and Instruct customer. For models with water softener: egen valve electrical elated (s) , 6-1, 8-3, , 6-1, 8-3, , ,

12 Customer Description Film or Spots on Glasses and/or Dishes (cont.) Poor Dry Sanitized LED Blinks or Incomplete Sanitization Message at End of Cycle (Control Could ot m Sanitization Achieved) Potential 4. Detergent carryover or oversudsing. 5. Etching of Check water hardness. If below 10 glass from too grains, instruct customer to use much detergent less detergent and recommend the at too high of 1 H Wash cycle. temperature. 6. Diverter 7. Drain loop check valve not sealing. 1. Customer not using rinse aid and/or dispenser empty. 2. Customer not using Heated Dry option. 3. inse aid dispenser 4. Vent stuck closed due to pilot relay stuck on (not all models). 5. Fan problem (on models with fan). 6. Control canceled cycle due to error detected with wash motor, drain motor, low water, or suds. Check elated (s) Check water hardness. If below grains, instruct customer to use less detergent and recommend the 1 H Wash cycle. 1. Disconnect drain hose at plumbing connection. 2. Elevate hose above dishwasher and with water. If water into dishwasher, replace entire drain loop. Install as high as possible and attach to underside of countertop if possible. Check rinse aid gauge level on dispenser. Instruct customer how to and monitor, add/use rinse aid. ecommend use of Heated Dry or Smart Dry to customer. 7. Heating 1. Door opened Instruct customer. during rinse or dry. 2. Incoming water under 65 F (18 C) 3. Heating 4. Thermistor/ OWI sensor 5. Intermittent door switch/ latch connection. 6. Line voltage too low to heat fast enough. 7. Air pressure surges in dishwasher due to washing with high suds causes brief opening of door switch contacts during nal rinse. 1. Be sure dishwasher is connected to the hot water supply. 2. Confirm temperature at sink (recommend 120 F [49 C]). Instruct customer to run water at sink before running dishwasher. 3. disconnect power and check all connections and measure resistance in Temperature Sensing circuit. eplace OWI if resistance is high. Check power source. Con at least 100 VAC. 9-1, , 6-1, 8-3, , , Customer Description Melted 1. Customer Instruct customer. Dishware uses nondishwasher safe and/or Spray Arm and/or dishes or loads Dishwasher plastic dishes Always Hot directly over heater. 2. Temperature sensing oisy Operation Leaks or Drips on Cabinet or Floor Potential 3. Water heating Heater stuck on. 4. Water heater displaced from mounting clip and/or pulled off center. 1. Spray arm stalled or blocked and spraying on the door. 2. Diverter 3. Motor problems force cycle to start and stop repeatedly. 4. o or low water. 5. Drains too long. 6. Vent stuck open. 7. Fan runs (makes noise) after cycle completed (on models with fan). 8. Excessive fan noise due to faulty fan (on models with fan). 1. Vent wax motor problem (not all models). Inspect heater. Adjust back into position if needed. - Instruct customer if blocked. - Check spray arm rotation and inspect for plugged nozzles. If plugged, clean nozzles and co rm ers are installed properly. - Controlled lower spray arm motor failed. Check spray arm moving in both directions during diagnostics cycle. Slow drain efer to Service s Table section for 8-1. Dishwasher is designed to keep fan running after cycle to avoid moisture buildup in dishwasher. Fan will turn off if door is opened longer than Instruct customer. 1. Check fan operation during service diagnostics test cycle eplace fan if does not spin freely. 2. Fan problem (on models with fan). 3. Too many suds. 4. Leaking dishwasher. 5. Unit not level (leaning forward) and water surges over front lip during cycle. 6. Air pressure surge when door is opened and immediately closed while dishwasher is hot can force droplets out of the vent duct. Check Check door/tub gasket and all water connections under dishwasher. efer to Service s Check error history for Float is likely to occur if unit is signi out of level and leaning forward. efer to Service s Instruct customer to leave door open a few minutes before reclosing, if opened while dishwasher is hot. elated (s) , 9-2, , 6-2, , W C All rights reserved /15