Haier ESD 300 Series Service Manual Download Page 83

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DIAGNOSTICS

dry cycle heater and

high limit switch

Dry cycle heater

High Limit Switch

normally closed

Opens at 172°F

(78°C)

Heater = 13 ohms

approximate

Summary of Contents for ESD 300 Series

Page 1: ...HAIER ESD 300 and 400 Series Tall Tub UNDERCOUNTER DISHWASHER Machine Compartment Service Additional Service Programs include Door Components Diagnostics Pump Module Components ...

Page 2: ...MACHINE COMPARTMENT Wash Pump assembly Drain Pump Assembly Fill Valve Electrical connection Heater Water temperature thermistor High Limit Thermostat Float switch FRONT ...

Page 3: ...Wash Pump assembly Drain Pump Assembly Notice The drain pump and wash pump assemblies are covered in detail in the Pump Module Service training program Component diagnostics are covered in the Diagnostics training program ...

Page 4: ...MACHINE COMPARTMENT Float and Float Switch Dishwasher has a time fill with a float safety switch Water fill cycle is 90 seconds Float is held in place with the float switch cover ...

Page 5: ...MACHINE COMPARTMENT Float and Float Switch Safety switch is encased in a plastic housing Float Switch front view ...

Page 6: ...MACHINE COMPARTMENT Float and Float Switch Open the safety switch housing by releasing clips and pulling door forward Float Switch front view ...

Page 7: ...INE COMPARTMENT Float and Float Switch Float safety switch Float is secured from lifting out when float switch cover is closed holding the stem end within the cover Float stem properly located on switch arm ...

Page 8: ...DIAGNOSTICS Float Safety Switch Float Safety Switch is Normally Open Switch CLOSED in this position NC NO ...

Page 9: ...MACHINE COMPARTMENT Float and Float Switch Replace the float switch housing by opening cover and releasing the float Then unscrew nut inside of tub ...

Page 10: ...MACHINE COMPARTMENT Water Temperature Thermistor Water temperature is monitored with a thermistor mounted in the bottom of the pump housing ...

Page 11: ...RTMENT Water Temperature Thermistor Be careful to mount the o ring on the thermistor when replacing Do not over tighten screws NTC Thermistor negative temperature coefficient 1380 ohms 70 F 780 ohms 90 F approximate ...

Page 12: ...MACHINE COMPARTMENT Heater Heater is held in place with insulating towers Unscrew the tower and remove the heater from inside of the tank ...

Page 13: ...ACHINE COMPARTMENT High Limit Thermostat The High Limit Thermostat is held in place with a flat spring type bracket holding it firmly against the bottom of the tank Do not cut the tie strap when removing ...

Page 14: ...nsor The Turbidity Sensor is an optical device that senses the degree soil in the water in the pump housing High amounts of soil extend the pre wash cycle Be certain o ring is in place when replacing sensor Do not over tighten screws ...

Page 15: ...MPARTMENT Drain Loop and Water Inlet The dishwasher is equipped with an anti siphon drain loop on the left side of the tank The water inlet to the tank is mounted on the left side of the tank above the fill valve ...

Page 16: ...MACHINE COMPARTMENT Door Hinge The door hinge uses a rope cable over rollers and a spring for tension ...

Page 17: ...HAIER This completes the Machine Compartment training for the ESD 300 and 400 Series Tall Tub UNDERCOUNTER DISHWASHER Other sections include Door Diagnostics and Pump Module ...

Page 18: ...HAIER ESD 300 and 400 Series Tall Tub UNDERCOUNTER DISHWASHER Pump Module Components Additional Service Programs include Door Components Diagnostics Machine Compartment Components ...

Page 19: ...PUMP MODULE SERVICE Wash Pump assembly In order to service the wash pump the drain pump must be removed before removing the main pump assembly Drain Pump Assembly ...

Page 20: ...DRAIN PUMP SERVICE NO NEED TO REMOVE Drain Hose The Drain Pump can be serviced in place without removing the pump module Drain Pump Assembly ...

Page 21: ...DRAIN PUMP SERVICE DRIP SHIELD MUST BE REPLACED WHEN REINSTALLING THE ASSEMBLY Drain Pump end view Drain Pump Assembly ...

Page 22: ...DRAIN PUMP REMOVAL Pump Retaining Clip and stop Depress retaining clip and rotate motor 1 8th turn counter clockwise then pull outward to release Drip Shield ...

Page 23: ...DRAIN PUMP SERVICE O Ring Seal Always replace O Ring seal when replacing pump Motor and Impeller are replaced as an assembly ...

Page 24: ...DRAIN PUMP REASSEMBLY Reinstall Drip Shield over tabs before installing pump Install O ring on motor flange then install motor assembly Rotate motor 1 8th turn clockwise to lock motor in place ...

Page 25: ...in Hose removed In order to service the wash pump the drain pump and turbidity sensor must be removed before removing the main pump assembly Remove Motor Wiring above condenser Disconnect thermistor wiring Remove turbidity sensor ...

Page 26: ...WASH PUMP SERVICE Remove Pump Retaining Locks 3 ...

Page 27: ...PUMP BODY REMOVAL Remove Lower Spray Arm Grasp the spray arm on each side of the shield and snap upward ...

Page 28: ...PUMP BODY REMOVAL Lower Spray Arm Spray arm post snaps onto water distribution tower Spray arm post screws into bottom of spray arm ...

Page 29: ...PUMP BODY REMOVAL Remove Water Distribution Arm Distribution Arm snaps over back channel 3 screws ...

Page 30: ...PUMP BODY REMOVAL Remove Remaining screws from filter cover Remove filter This process can also be done after pump module is removed ...

Page 31: ...PUMP BODY REMOVAL Lift large object pre filter out This process can also be done after pump module is removed ...

Page 32: ...PUMP BODY REMOVAL Remove Pump Assembly from tank Twist slightly to the right lifting the right front first ...

Page 33: ...BODY INSTALLATION Replace Pump Assembly into tank Install left rear first Slide pump motor and drip shield under lip of tank opening Start with pump off center then rotate to locator pin and drop into place ...

Page 34: ...PUMP MOTOR IMPELLER SEAL SERVICE Remove inner strainer impeller cover ...

Page 35: ...IMPELLER SEAL SERVICE Solid food chopper and strainer assembly Motor shaft Spring Strainer Spacers Chopper Blade Retainer Nut Remove nut by prying off with thin screwdriver blade Pry between chopper blade and nut ...

Page 36: ...PUMP MOTOR IMPELLER SEAL SERVICE When reinstalling strainer align ears of strainer on edge of pump housing groove Strainer sets in retainer groove ...

Page 37: ...ICE When reinstalling cover be careful to locate strainer in locater groove Reinstall chopper assembly in order shown below Push retainer nut on with needle nose pliers Motor shaft Spring Strainer Spacers Chopper Blade Retainer Nut ...

Page 38: ...PUMP MOTOR IMPELLER SEAL SERVICE Wash Motor Pump Removal Note general location of electrical connections Drip cover Remove retaining screw ...

Page 39: ...PUMP MOTOR IMPELLER SEAL SERVICE Wash Motor Pump Removal Pull motor and pump assembly outward Rotate motor 1 8th turn counter clockwise Pump Motor assembly will separate from housing at this line ...

Page 40: ...PUMP MOTOR IMPELLER SEAL SERVICE Wash Pump Assembly Electrical connection Pump body Align arrow with electrical connections when replacing Impeller and shaft for solid food disposer components ...

Page 41: ...PUMP MOTOR IMPELLER SEAL SERVICE Wash Pump Disassembly Pump body Impeller and shaft Insert screwdriver in motor fan blade to lock Unscrew Impeller from motor shaft ...

Page 42: ...PUMP MOTOR IMPELLER SEAL SERVICE Wash Pump Seals Seals are available separately and both halves must be replaced at the same time ...

Page 43: ...PUMP MOTOR IMPELLER SEAL SERVICE Wash Pump Motor Capacitor is replaced with the motor Electrical Connections Locking tabs to pump housing ...

Page 44: ...IMPELLER SEAL SERVICE Wash Pump Re Assembly Pump body Align arrow with electrical connections when replacing Pump must sit flush against motor housing Install impeller by holding motor fan blade HAND TIGHTEN ONLY ...

Page 45: ...IMPELLER SEAL SERVICE Wash Pump Re Assembly Align motor flange with flange on pump housing Then slide pump motor assembly into the housing Lubricate the pump body seal with silicone grease for easier installation ...

Page 46: ...PUMP MOTOR IMPELLER SEAL SERVICE Wash Pump Re Assembly When motor is in and aligned with locking flanges rotate the motor to align locking screw tab with the screw hole Locking screw tab ...

Page 47: ...PUMP MOTOR IMPELLER SEAL SERVICE Wash Pump Re Assembly Locking screw Install drip cover retaining tab under the head of the locking screw ...

Page 48: ...m the pump body through the drain pump cycle and prevent fine soil trapped in the upper filter from reentering the wash system during the wash cycle It also prevents waste water from reentering the wash pump at the end of the drain cycle Back flow valve Remove by grasping with needle nose pliers and pulling outward ...

Page 49: ...HAIER This completes the Pump Module Components training for the ESD 300 and 400 Series Tall Tub UNDERCOUNTER DISHWASHER Other sections include Door Machine Compartment and Diagnostics ...

Page 50: ...HAIER ESD 300 and 400 Series Tall Tub UNDERCOUNTER DISHWASHER Door Components Additional Service Programs include Diagnostics Machine Compartment Pump Module Components ...

Page 51: ...OR PANEL Removal Rinse Aid Dispenser Detergent Dispenser closed Door Panel Removal remove screws shown in red Additional screws on opposite side of door Vent Cover Control Panel Removal remove all screws ...

Page 52: ...PC CONTROL BOARD Low Voltage connectors to touch panel rinse aid dispenser High Voltage connectors to motors heater inlet valve etc Retaining screws ...

Page 53: ...L Touch Panel can be replaced by carefully prying up and then peeling off laminated panel Clean Touch Panel frame with rubbing alcohol before replacing touch panel DO NOT BEND OR KINK Touch Panel during assembly ...

Page 54: ...Test Solenoid and check for actuation of door release and rinse aid plunger DETERGENT CUP 300 Ohms 25 Dispenser actuates 2 times 1st opens detergent door 2nd dispenses rinse aid ...

Page 55: ...T CUP Rinse Aid Sensor float type switch Float type switch 0 ohms resistance when empty Indicator on control panel shows when rinse aid is low If no signal when rinse aid is empty replace detergent cut assembly ...

Page 56: ...DETERGENT CUP Removal Rinse Aid Dispenser activation solenoid Remove 6 Screws to remove detergent cup Replace as a unit Replace Dispenser unit as an assembly ...

Page 57: ...DOOR VENT Vent Open During dry or power off Vent Closed During wash rinse Wax Motor Extends plunger to close vent 15 seconds to close 3 minutes to release approx ...

Page 58: ...DOOR VENT Test 1250 Ohms 100 ohms Replace as an assembly ...

Page 59: ...DOOR VENT Removal Rinse Aid Dispenser setting Body is released from inside of door when cover is removed Rotate cap 1 8 turn to release from inner body ...

Page 60: ...DOOR LATCH Latch is auto adjusting and operates by pulling out pushing in on the door Door Latch Clip from main body Latch Switch 2 Switch both Line and Neutral ...

Page 61: ...DOOR LATCH OPEN position Heavy Spring holds tension on door in closed position NO LATCH ADJUSTMENT required CLOSED position ...

Page 62: ...DOOR LATCH Switches are Normally OPEN when door is open REPLACE AS AN ASSEMBLY CLOSED position OPEN position Door latch closes cams above each switch to move to CLOSED POSITION ...

Page 63: ...DOOR LATCH Squeeze LATCH CLIP and pull outward to remove Push LATCH CLIP in fully until notch engages in sheet metal flange No further adjustments ...

Page 64: ...DOOR TENSION Spring Rope Cable Routing Door Hinge ...

Page 65: ...HAIER This completes the Door Components training for the ESD 300 and 400 Series Tall Tub UNDERCOUNTER DISHWASHER Other sections include Diagnostics Machine Compartment and Pump Module ...

Page 66: ...HAIER ESD 300 and 400 Series Tall Tub UNDERCOUNTER DISHWASHER Diagnostics Additional Service Programs include Door Components Machine Compartment Pump Module Components ...

Page 67: ...DIAGNOSTICS Control Panel ESD 310 311 312 ...

Page 68: ...DIAGNOSTICS Control Panel ESD 310 311 312 ...

Page 69: ...DIAGNOSTICS Control Panel ESD 310 311 312 ...

Page 70: ... 312 Indicator glows during the sensing part of the cycle Washing continues during the sensing Rinsing ESD310 311 312 Indicator glows during the rise periods Drying ESD310 311 312 Indictor glows during the drying cycle after the final rinse Clean Indicator glows when a wash cycle is complete and will remain ON until the door is opened Sanitized Indicator glows when the cycle has met sanitization c...

Page 71: ... seconds Repeat to deactivate The Child Lock indicator will glow when activated If Child Lock is already activated the Child Lock indicator will flash 3 times The lock can be activate with the door open or closed No controls will function once activated The wash cycle can be started then activated to prevent tampering ...

Page 72: ...r 1 minute then repeat 7 press Light Wash The heater and washing pump will run for 1 minute then stop then repeat 8 press Rinse Hold the heater is on for 5 minutes then off for 5 minutes then repeats 9 press Sanitize Rinse the dry vent and drain pump operates for 2 minutes then stops for 9 seconds then repeats 10 press High Temp Wash the vent door wax motor operates for 1 minute and stops for 1 mi...

Page 73: ...STICS Pump Module Components Wash Pump motor Water temperature thermistor Drain Pump motor All components can be tested in place by removing the toe panel and without removing the pump module Turbidity Sensor ...

Page 74: ...Drain pump motor Approx 26 ohms DIAGNOSTICS Drain Pump Motor ...

Page 75: ...DIAGNOSTICS Wash Pump Motor Internal motor wiring Dual winding capacitor start motor ...

Page 76: ...Blue Purple Yellow DIAGNOSTICS Wash Pump Motor Internal motor wiring Blue Purple 8 8 ohms Purple Yellow 6 4 ohms Blue Yellow 14 8 ohms approximate 10 ...

Page 77: ...DIAGNOSTICS Thermistor water temperature sensor Dual winding capacitor start motor ...

Page 78: ...DIAGNOSTICS Thermistor water temperature sensor Onboard diagnostics for the thermistor ...

Page 79: ...DIAGNOSTICS Thermistor water temperature sensor NTC Thermistor negative temperature coefficient 1380 ohms 70 F 780 ohms 90 F approximate ...

Page 80: ...ycle indicates the sensor is functioning DIAGNOSTICS Turbidity Sensor The Turbidity Sensor senses the amount of soil in the water The sensor indicator on the control panel glows during end of the Pre Wash Cycle If soil is identified by the sensor the cycle will be extended by a varied amount of time as the sensing continues ...

Page 81: ...dity Sensor all pre wash cycles The turbidity sensor is active toward the end of the PRE WASH cycle and the cycle will be extended if excessive turbidity is present The Turbidity Sensor light will be ON during this time ...

Page 82: ...imer stalls in a cycle check water temperature If the inlet water temperature is below 130 F in the normal cycle the timer will stall and heat the water until the minimum temperature is achieved Temperature rise is about 1 5 F per minute Test for 120v at the heater ...

Page 83: ...DIAGNOSTICS dry cycle heater and high limit switch Dry cycle heater High Limit Switch normally closed Opens at 172 F 78 C Heater 13 ohms approximate ...

Page 84: ...DIAGNOSTICS Dishwasher running no water in tub From this flow chart you can see that the dishwasher has a time fill with a safety float Water fill cycle is 90 seconds ...

Page 85: ...DIAGNOSTICS Water Fill Level Water fill level in all cycles is indicated by the ridge around the tank Rear of tank Front left corner ...

Page 86: ...DIAGNOSTICS Fill Valve Solenoid Fill Valve Solenoid 1064 ohms approximate Also test for 120v during the fill cycle ...

Page 87: ...DIAGNOSTICS Float Safety Switch Float Safety Switch is Normally Open Switch CLOSED in this position NC NO ...

Page 88: ...DIAGNOSTICS Schematic 310 311 312 ...

Page 89: ...DIAGNOSTICS Rapid Advance Test Procedure ...

Page 90: ...DIAGNOSTICS Typical cycles and temperatures Cycle time will vary due to inlet water temperature and heating time required Normal Wash Medium Soil Level ...

Page 91: ...DIAGNOSTICS Typical cycles and temperatures Cycle time will vary due to inlet water temperature and heating time required Anti Bacterial Mode ...

Page 92: ...HAIER This completes the Diagnostics training for the ESD 300 and 400 Series Tall Tub UNDERCOUNTER DISHWASHER Other sections include Door Machine Compartment and Pump Module ...

Page 93: ...THANK YOU http service haieramerica com ...

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