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AIRE ACONDICIONADO PORTATIL

PORTABLE AIR CONDITIONER

PPA1208J

CONTENTS

Maintenance for Common Trouble.............................................................3

Trouble Analysis…................................................................................................3

Remote control battery installation ..................................................................4

Trouble Shooting...................................................................................................5

Electronic Control Theory...................................................................................5

Typical TroubleAnalysis......................................................................................7

Trouble Shooting for Cooling Failure........................................................11

Refrigerant Principle............................................................................................11

Trouble Shooting Flow for Cooling Failure..................................................... 12

Circuit Diagram.....................................................................................................13

Explosive View....................................................................................................... 14

Section One

Maintenance for Common Trouble

Chapter I Trouble Analysis

When trouble happened, don’t get panicky and take apart the machine without any

analysis, otherwise some unnecessary damages will be caused. Please deal with the

trouble as the following to find a correct solution.

If the trouble cannot be solved by the following solutions, please check special

trouble solutions for help.

Trouble Cause Solution

Machine cannot work

1. Power-off

2. Power plug is loose

3.Water-full indicator turns on or “P2”

flashes on screen

1.Power-on

2.Re-insert power plug

3.Drain out the water

Cooling function cannot work

well

1.Filters are blocked by dusts

2.Air-inlet is blocked

3.The room is too big or blow-by

1.Clean filters

2. Remove the blockage.

3. Adjust room area or strengthen

the seal

Water leakage

1.Machine doesn’t stand upright

2.Water-outlet is blocked

1 Let machine stand upright

2. Unchoke water-outlet.

Abnormal noise of machine

1.Machine is not placed well

2.Filters is blocked

1.Let machine on flat place and

stand upright

2. Clean the filters

Heat air doesn’t go out

immediately under heating

mode.

1.Environment

al temperature is higher

than setting temperature

2.Heat air will blow out three minutes later

after heating mode running

1.Make setting temperature is

higher than environmental

temperature

2.Please wait patiently for three

minutes.

Strange smell blows out

Machine is unused for a longtime, it has

adsorbed the smell from furniture , carpet,

paint. when the machine runs, the smell

will blow out

Run machine for 2-5minutes, the

strange smell will disappear.

Chapter II Remote control battery installation

⑴O pen the cover of battery case in remote control.

⑵According to the polarity tips, install batteries into remote control correctly. (positive

pole to “+”, negative pole to “ –“ ).

Section Two

Trouble Shooting

Chapter I Electronic Control Theory

First of all, let’s get a simple knowledge of electronic control theory, so that to seize the

key points of problems quickly and deal with problems more efficiently. An electronic

schematic diagram as following (this is a typical schematic diagram, for special machine ,

please note the circuit diagram attached to the machine ):

From above circuit diagram we can see that the whole diagram is divided into two parts:

compressor water-

thrashed

motor

four-way

valve fan-motor

water

level

switch

indoor

temperaturn

sensor coil

pipe

sensor

transformer

Display Panel

(include

receiving

head)

strong power part and weak power part, and electric transformer is the cut-off point.

Strong power part before transformer while weak power part after transformer.

For strong power part, the phase line enters through 30A compressor relay RY1, then

passes fuse, fan motor, four-way valve, water motor. Fan motor is made up of tap motor

and centrifugal fan. There are high fan speed and low fan speed, and be controlled by two

5A relay (RY3 and RY4) respectively. RY3 for high speed while RY4 for low speed.

Water motor is shaded-pole motor and is controlled by relay RY2. Four-way valve is

controlled by RY5.

For weak power part, it can be divided into two parts: power supply part and control

part. The part of power supply goes out through transformer output-port, then passes four

bridge rectifiers of commutation diode, capacitive E1 wave filtering , and get volts d.c.

about 12V , to supply relay and drive integrated package ULN2003, the other way go

through current-limiting resistance RR1 and 5V stabilized voltage 7805 to supply SCM ,

peripheral circuit and display power. The core of control part is HT46R47. Its input

parts are keys, receiving head, room temperature sensor , evaporator temperature sensor

and water-level detecting circuit; its output parts are control relay, buzzer and status

display.

Keys, LED or LCD are man-machine conversation windows. By keys we can change

machine work status; LED or LCD displays machine current work status. Remote control

receiver: when controlled by remote control, the remote control receiver gets the control

signals from remote control, then sends them to SCM. Evaporator temperature sensor

sends the surface temperature of evaporator to SCM. Water-level detecting circuit detects

if water tank is full, and sends the signals to SCM. Analyzed by SCM process, control

signals is sent out through drive ICULN2003 to control relay’s ON/OFF. Then the

machine can work well under SCM uniform control.

Chapter II Typical Trouble Analysis

Trouble Detecting Flow forAbnormal Display

Display Abnormal

Display Failure Code

E1：Indoor temperature sensor failure:

sensor plug is in a bad contact with

control panel, or damage in sensor

E2：Coil pipe temperature sensor:

sensor plug is in bad contact with

control panel, or damage in sensor.

Water-full indicator turns on and display

P2 (Refer to Section One Chapter I)

Display stroke-lack or indicator off :

1.Control panel is in a bad contact with display panel, then

need to re-insert plug .

2.Damage in display panel, then need to replace display panel.

Trouble Shooting Flow for Machine Turn-On Failure

NO Re-plug N line and L line , make them in

a good contact with film-inserted

After power-on , key "POWER "cannot run machine:

Check if power cord terminator (N, L) is in a good

contact with control panel film-inserted.

Check if there is 5V voltage out from 7805

YES

YES Replace main control panel

Check if the link between display panel and main control

panel is loose.

YES Re-link them

Replace main control panel and display panel .

Trouble Shooting Flow for Compressor Turn-On Failure

Replace main control panel

YES

If compressor overload.

YES

After overloading, machine will recover normal

If compressor relevant- link -terminators

are loose

YES Re-fix compressor relevant-link-terminators

NOT OK

Replace compressor capacitance, then

check if it is OK .

Replace the compressor with the same model No.

Setup the temperature to lowest ( cooling

mode) or highest (hesting mode).

If there is strong power out from

compressor realy

YES

If the setting temperature under cooling mode is too high.

If the setting temperature under heating mode is too low.

YES

Compressor turn-on failure.

If there is at least 3 minutes after

compressor restating .

Wait for 3 minutes, then re-check the compressor.

Trouble Shooting Flow for Low/High Fan-Speed Running Failure

There is foreign body in fan motor , and fan

motor cannot work with too big resistant.

Remove the foreign body

YES

Re-insert fan terminator plug, then

check if it is OK .

Replace the fan motor with the

same model No.

NOT

Replace main control panel

YES

Replace main control panel

Re-insert fan terminator plug, then

check if it is OK.

Repalce the fan motor with the same model

No., then check if it is OK .

NOT

Replace main control panel

NOT

Replace main control panel

Check if there is strong power out

from low fan-speed relay.

Low fan -speed running failure after machine turns on.

Check if there is strong power out from power supply line of

low fan-speed.

High fan-speed running failure after machine turns on.

Check if there is strong power out from power supply

line of high fan-speed.

Check if there is strong power out

from high fan-speed relay.

Trouble Shooting Flow for Fan Running Failure

If there is foreign body in wind wheel ( wind wheel

cannot work with big resistance ), YES or NO?

Remove foreign body

YES

After re-insert fan terminal

plug, OK or NOT ?

NOT OK OK

After replace fan motor with the

same model No., OK or NOT ?

NOT OK

Replace main control panel

Fan running failure

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