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Haier ESD 300 Series Service Manual

Undercounter dishwasher
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HAIER
ESD 300 and 400 Series
"Tall Tub"
UNDERCOUNTER
DISHWASHER
Machine Compartment
Service
Additional Service Programs include:
Door Components
Diagnostics
Pump Module Components

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Table of Contents
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Summary of Contents for Haier 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

    MACHINE COMPARTMENT FRONT Electrical connection High Limit Thermostat Float switch Drain Pump Assembly Fill Valve Water temperature Wash Pump thermistor assembly Heater...
  • Page 3 MACHINE COMPARTMENT 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. Drain Pump Wash Pump Assembly assembly...
  • 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 MACHINE COMPARTMENT Float and Float 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. Float safety switch...
  • Page 8 DIAGNOSTICS Float Safety Switch Float Safety Switch is Normally Open Switch CLOSED in this position...
  • 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 MACHINE COMPARTMENT 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: High Limit Thermostat

    MACHINE 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: Turbidity Sensor

    MACHINE COMPARTMENT Turbidity Sensor 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 MACHINE COMPARTMENT 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: Door Hinge

    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 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 In order to service the wash pump, the drain pump must be removed before removing the main pump assembly. Wash Pump Drain Pump assembly Assembly...
  • Page 20 DRAIN PUMP SERVICE The Drain Pump can be serviced in place without removing the pump module NO NEED TO Drain Pump REMOVE Assembly Drain Hose...
  • Page 21 DRAIN PUMP SERVICE Drain Pump end view Drain Pump Assembly DRIP SHIELD MUST BE REPLACED WHEN REINSTALLING THE ASSEMBLY...

  • Page 22: Drain Pump Removal

    DRAIN PUMP REMOVAL Depress retaining clip Drip Shield and rotate motor turn counter-clockwise then pull outward to release Pump Retaining Clip and stop...
  • Page 23 DRAIN PUMP SERVICE Motor and Impeller are replaced as an assembly O-Ring Seal Always replace O-Ring seal when replacing pump...
  • Page 24 DRAIN PUMP REASSEMBLY Install O- ring on motor flange then install motor assembly Rotate motor turn clockwise to lock motor in place Reinstall Drip Shield over tabs before installing pump...
  • Page 25 WASH PUMP SERVICE In order to service the wash pump, the drain pump and turbidity sensor must be removed before removing the main pump assembly. Remove Drain Hose Remove turbidity (removed) sensor Disconnect thermistor Remove Motor Wiring wiring (above condenser)
  • 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 screws into bottom of spray arm Spray arm post snaps onto water distribution tower...
  • 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 PUMP BODY INSTALLATION Replace Pump Assembly into tank Start with pump off center then rotate to locator pin and drop into place Install left rear first. Slide pump motor and drip shield under lip of tank opening...
  • Page 34 PUMP MOTOR – IMPELLER - SEAL SERVICE Remove inner strainer & impeller cover...
  • Page 35 PUMP MOTOR – IMPELLER - SEAL SERVICE Solid food chopper and strainer assembly Remove nut by prying off with thin screwdriver blade Pry between chopper blade and nut Strainer Chopper Blade Spring Motor shaft Retainer Nut Spacers...
  • 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 PUMP MOTOR – IMPELLER - SEAL SERVICE 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 Strainer Chopper Blade Spring Motor shaft Retainer Nut Spacers...
  • Page 38 PUMP MOTOR – IMPELLER - SEAL SERVICE Wash Motor – Pump Removal Drip cover Remove retaining screw Note general location of electrical connections...
  • Page 39 PUMP MOTOR – IMPELLER - SEAL SERVICE Wash Motor – Pump Removal Rotate motor 1/8 turn counter-clockwise Pull motor and pump assembly Pump & Motor assembly outward 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 Insert screwdriver in motor fan blade to lock Impeller and shaft Unscrew Impeller from motor shaft Pump body...
  • 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 Electrical Connections Locking tabs to pump housing Capacitor is replaced with the motor...
  • Page 44 PUMP MOTOR – IMPELLER - SEAL SERVICE Wash Pump Re-Assembly Pump body - Align arrow Install impeller by holding with electrical motor fan blade connections when replacing HAND TIGHTEN ONLY Pump must sit flush against motor housing...
  • Page 45 PUMP MOTOR – 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 Locking screw When motor is in and aligned with locking flanges, rotate the motor to align locking screw tab with the screw hole...
  • 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 Back-flow Valve A back-flow valve is located in the base of the pump housing. It allows heavy soil to be removed from 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.
  • 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 Diagnostics...

  • Page 50: Door Components

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

  • Page 51: Door Panel

    DOOR PANEL Removal Control Panel Vent Cover Removal remove all screws Detergent Dispenser (closed) Door Panel Removal remove screws shown in red Rinse Aid Dispenser Additional screws on opposite side of door...

  • Page 52: Pc Control Board

    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: Touch Panel

    TOUCH PANEL Touch Panel can be replaced by Clean Touch Panel carefully prying up and then frame with peeling off laminated panel rubbing alcohol before replacing touch panel DO NOT BEND OR KINK Touch Panel during assembly...
  • Page 54 DETERGENT CUP Test Solenoid and check for actuation of door release and rinse aid plunger Dispenser actuates 2 times – opens detergent door – dispenses rinse aid 300 Ohms + / - 25...
  • Page 55 DETERGENT CUP Rinse Aid Sensor Indicator on control panel shows float type switch when rinse aid is low. If no signal when rinse aid is empty, Float type switch replace detergent cut assembly 0 ohms resistance when empty...
  • Page 56 DETERGENT CUP Removal Remove 6 Screws to remove detergent cup (Replace as a unit) Rinse Aid Dispenser activation solenoid Replace Dispenser unit as an assembly...
  • Page 57 DOOR VENT Vent Closed During wash / rinse Vent Open During dry or power off 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 Body is released from inside of door when cover is removed Rinse Aid Dispenser setting Rotate cap 1/8 turn to release from inner body...

  • Page 60: Door Latch

    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 OPEN position Door latch closes, cams above each switch to move to CLOSED CLOSED POSITION position...
  • Page 63 DOOR LATCH Push LATCH CLIP in Squeeze LATCH CLIP fully until notch and pull outward engages in sheet metal to remove flange No further adjustments...
  • Page 64 DOOR TENSION Rope – Cable Routing Spring 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 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: Indicator Lamps

    DIAGNOSTICS Indicator Lamps Water Heated (ESD310-311-312) Indicator glows only when the cycle pauses to heat water to a set temperature. Washing or rinsing continues as the water is heated. Once water reaches the set temperature, the light goes off and the cycle resumes.
  • Page 71 DIAGNOSTICS Control Panel Child Lock (various models) To activate the Child Safety Lock, press and hold Heated Dry for 3 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.
  • Page 72 DIAGNOSTICS Rapid Test Program ESD 310-311-312 Confirm all tests in Service Bulletins on the Haier parts and service web site. Additional models available Dishwasher door closed -- rapid advance by selecting the next button in sequence 1 press High Temp Wash...
  • Page 73 DIAGNOSTICS Pump Module Components All components can be tested in place by removing the toe panel and without removing the pump module Turbidity Sensor Drain Pump motor Wash Pump motor Water temperature thermistor...

  • Page 74: Drain Pump Motor

    DIAGNOSTICS Drain Pump Motor Drain pump motor Approx 26 ohms...
  • Page 75 DIAGNOSTICS Wash Pump Motor Internal motor wiring Dual winding capacitor start motor...
  • Page 76 DIAGNOSTICS Wash Pump Motor Internal motor wiring Blue Purple Yellow 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: Turbidity Sensor

    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 DIAGNOSTICS Turbidity 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 DIAGNOSTICS Dishwasher running – program does not advance If the timer 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.
  • Page 83 DIAGNOSTICS dry cycle heater and high limit switch Heater = 13 ohms approximate Dry cycle heater High Limit Switch normally closed Opens at 172° F (78° C )
  • 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...
  • 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 Pump Module...
  • Page 93 THANK YOU http://service.haieramerica.com...

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