Haier PBFS21EDAW, Service Manual

Item

Step

Checkpoint

Tools

Content

1

Check the power

1

ǃ

Measure the voltage of power with a multimeter,if it beyond standard

scope,adjust it to normal scope;

Notice

:measure the power with "AC" of the multimeter.

2

ǃ

Check connection of power plug and socket,if it's not good,replace or

adjust them.

multimeter,pan-

screwdriver,cross-

screwdriver

Too high or too low voltage of power,bad connection of
power plug and socket will cause compressor(and control
system) couldn't work.

2

Check the

compressor start

or not under "test"

mode

At the same time,press the two buttons of FRZ temperature adjustment and
hold on for 3 seconds,there will be "T1T1" on display panel,which means
mandatory start mode.

/

The compressor and fan motor will start under this
mode.Check the compressor can work normally or not.If
so,skip steps 5 to 9,if not,skip steps 3 and 4.

3

Check temperature

of FRZ

compartment

Check the FRZ temperature meet the START temperature or not.

thermometer

If the FRZ temperature couldn't meet the START
temperature,compressor will not start.

4

Check the FRZ

sensor

Check the resistance of FRZ sensor accord with the actual FRZ temperature
or not.

Notice

:Please check the resistance and the temperature data above.

thermometer,multimeter

If the resistance does not accord with the
temperature,compressor will not start because the sensor
passes low temperature parameter to main control PCB.

5

Check connector

Check those connectors of main control PCB,display PCB,Inverter PCB,and
the compressor terminal.

/

Check the wiring of connector fall off or not.

6

Check connection

of "+" and "-".

Make sure that connection of signal input terminal on Inverter PCB is right.

Notice

:right of signal input terminal is "+",while the left is "-".

multimeter

If it's wrong connection,reconnect them.

7

Test the output of
control signal on
main control PCB

Measure the voltage of two black wires and the red wire(signal control wire)
of Inverter PCB.

Notice

:The multimeter must be on "DC",generally speaking,the voltage is

2.5V.

multimeter

If there is no voltage,the signal wire or main control PCB
is bad;if the voltage is too high,the main control PCB is
bad;if the voltage is normal,check power input of inverter
PCB.

8

Check the inverter

PCB

If the voltage is normal,the inverter PCB or compressor is bad.Then replace a
new inverter PCB and check the compressor start or not.

Inverter PCB

If the compressor couldn't start after replacing inverter
PCB,the compressor is bad.

9

Check the

compressor

1

ǃ

Adjust the resistance dial of multimeter to zero,measure the resistance of

the three terminals of compressor

DŽ

If the voltage is normal,the compressor

doesn't run,but there is sound of "wengweng",the compressor is short-circuit;
2

ǃ

If the voltage is normal,the compressor doesn't run,and there isn't sound

of "wengweng",the compressor is open-circuit;
3

ǃ

Put the measure pen on shell of compressor,if the lamp of measure pen

is on,there is electricity leakage.

multimeter,pan-

screwdriver,cross-

screwdriver

1

ǃ

The resistance is abnormally;

2

ǃ

Measure resistance of two terminals between the

three ones,if the reading is infinity,there is open-circuit;if
the reading is zero,there is short-circuit;
3

ǃ

Connect one pole of the multimeter with one terminal

while the other pole is connecting with earth wire,if the
resistance is less than 2M

ȍ

,there is electricity leakage of

compressor.

Instruction of compressor check

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