Haier DW-8888-02 Service Manual

HAIER

HOUSEHOLD ELECTRICAL

DISHWASHER

Service Manual

PART# DW-8888-02

HAIER AMERICA TRADING, LLC

www.haieramerica.com

1

TABLE OF CONTENTS PAGE

Working Principles 3

Control Panel 4

Main Technical Data 4

Electrical Circuit Diagram 5

Wiring Technology 5

Troubleshooting And Maintenance 9

Resistance Measurements and Troubleshooting Codes 14

1. WORKING PRINCIPLE

When the power supply button is pressed, the power is on; the
indicator lights up. Then the knob is turned to the symbol with the
reference mark “|”. The dishwasher starts normal washing cycle. The
program controller starts rotating, with an internal cam, which can
turn-on/off, the contacts and therefore drives various electrical
components working. After starting, the dishwasher will firstly drain
previous water that remain, and then open the solenoid valve to
proceed in water intake.

In the lowest point of the bottom of the dishwasher container there is
a “water gutter” connected to a “pressure conduit”. The “pressure
conduit” has an “air pressure switch” installed on it. When the level of
the water inside the dishwasher rises, the inner pressure of the “air
pressure switch” increases. The “air pressure switch” will stop the
rising of the water level when it reaches the setting water level. At this
time, the program controller motor keeps on running 15S, and the
process of water intake control is over.

When the process of water intake is over, the machine will turn into
washing status according to the proceeded program. The fundamental
principle is that the city water is circulated by pumping pressure using
water pump and sprayed to wash. After the water pump is on, the city
water flows through the water pump, turns into high-pressure water
current to be pressed into the “sprayer” and sprayed in different angle
from the nozzles on the “sprayer”, thus achieving the water current
spraying for each place inside the machine from different angle. At the
same time, the “sprayer” is drove to rotate by the counterforce of
spraying, and the effect of spatial spray with various angles and
various aspects coming true. After that, the water current converges
and flows through the “filter screen” into the “ water gutter” and backs
to the water pump to be pumped again, thus moves in cycles. During
the working process of the wash pump, the pressure of water level
decreases, “air pressure switch” is opened and the reset button on it
closed which starts the “water intake solenoid valve”. When the “air
pressure switch” closed and the reset button opened, water intake
stops. In the supplement process of water intake, the wash pump
keeps on working. During the whole cycle, the heater controlled by
thermo limiter controls the water temperature increasing slowly. When
the wash process is finished, the program controller will automatically
turns to the draining cycle. The dryness of the dishwasher utilizes the
excess heat. After the whole cycle is finished, the knob turns back to
the dotted line, and the indicator of power supply will still lights up.

3

The cycle sequence is as follows:

Power on Program selection Water intake Washing
Draining Rinsing Draining Excess heat drying

CONTROL PANEL

MAIN TECHNICAL DATA

Type

Contents

ESD200

Name Household dishwasher

Power supply AC 110-120V/60Hz

Power

Pump: 150, Heater: 1300W, Maximum: 1460W

Washing mode Spraying

Drying mode Dry by excess heat

Outline dimension

598*581*864

Weight 93lbs

Capacity For 12 person

Water pressure
used

0.03-0.6Mpa

4

ELECTRICAL CIRCUIT DIAGRAM

WIRING TECHNOLOGY

1 Components wiring specification

Serial

No.

Name of

components

Wiring diagrammatic drawing

Remarks

Water

1

overflow

switch

Three wire
cannot be
interchanged

5