Samsung AQ09, AQ12, AQ09A1VE-XSA Troubleshooting

5. Troubleshooting

5-1 Items to be checked first

1 ) Is the voltage of the power corre c t ?

The input voltage shall be 198-264VAC. The airconditioner may not operate properly if the voltage is out of this range.

2 ) Is the link cable linking the indoor unit and the outdoor unit linked pro p e r l y ?

The indoor unit and the outdoor unit shall be linked by 5 cables. Check the terminals if the indoor unit and outdoor unit are properly linked by the same number of cables. Otherwise the airconditioner may not operate pro p e r l y.

3 ) When a problem occurs due to the contents illustrated in the table below it is a symptom not related to the

malfunction of the airc o n d i t i o n e r.

NO Operation of air conditioner

1 The COOL operation indication LED (Green) blinks when a

power plug of the indoor unit is plugged in for the first time.

2 In a COOL operation mode, the compressor does not

operate at a room temperature higher than the setting temperature that the IN DOOR FAN should operate. In a HEAT operation mode, the compressor does not operate at a room temperature lower than the setting temperature that indoor fan should operate.

3 Fan speed setting is not allowed in AUTO or DRY mode.

4 Compressor stops operation intermittently in DRY mode.

5 Compressor of the outdoor unit is operating although it is

turned off in a HEAT mode.

6 Timer LED only of the indoor unit lights up and the

air conditioner does not operate.

7 The compressor and indoor fan stop intermittently in HEAT

mode.

8 Indoor fan and outdoor fan stop operation intermittently in

a HEAT mode.

9 The compressor stops intermittently in a COOL mode or DRY

mode, and fan speed of the indoor unit decreases.

Explanation

It indicates power is on. The LED stops blinking if the operation ON/OFF button on the remote control unit is pushed.

In happens after a delay of 3 minutes when the compressor is reoperated. The same phenomenon occurs when a power is on. As a phenomenon that the compressor is reoperated after a delay of 3 minutes, the indoor fan is adjusted automatically with reference to a temperature of the air blew

The speed of the indoor fan is set to LL in DRY mode. Fan speed is 5 steps is selected automatically in AUTO mode.

Compressor operation is controlled automatically in DRY mode depending on the room temperature and humidity.

When the unit is turned off while de-ice is activated, the compressor continues operation for up to 9 minutes (maximum) until the deice is completed.

Timer is being activated and the unit is in ready mode. The unit operates normally if the timer operation is cancelled.

The compressor and indoor fan stop intermittently if room temperature exceeds a setting temperature in order to protect the compressor from overheated air in a HEAT mode.

The compressor operates in a reverse cycle to remove exterior ice in a HEAT mode, and indoor fan and outdoor fan do not operate intermittently for within 20% of the total heater operation

The compressor stops intermittently or the fan speed of the indoor unit decreases to prevent inside/outside air frozen depending on the inside/outside air temperature.

4 ) Indoor unit observes operation condition of the air conditioner, and displays self diagnosis details

on the display panel.

NO Display

1 Operating LED blinking (1Hz) 2 TIMER LED blinking (1Hz) 3 O P E R ATING and TIMER LED blinking (1Hz) 4 FAN LEA blinking (1Hz)

Samsung Electronics

Restore from power failure (input initial power) Indoor unit Room sensor Error (open or short) Indoor unit heat exchanger temperature sensor Error (open or short) Indoor fan malfunctioning (for spead is Below 38Orpm)

Self Diagnosis

5-1

5-2 Fault Diagnosis by Symptom

5-2-1 No Power (completely dead)-Initial diagnosis

1) Checklist : (1) Is input voltage normal? (198-264V~) (2) Is AC power linked corre c t l y ? (3) Are connections between primary side, secondary side of the power transformer and PCB good. (4) Is output voltage of DC regulator IC KA7812 (IC01) normal? (11 V D C - 1 2 . 5 V D C ) (5) Is output voltage of DC regulator IC KA7805 (IC02) normal? (4.5VDC-5.5VDC)

2 ) Troubleshooting pro c e d u re

YES

Replace

PCB display

Is DC voltage of PCB

display normal?

Is 198~264VAC

applied to the primary side of the power transformer?

•Check linkage between

power cord and

terminal tap

•Check fuse

Is 14~18VAC appear in

the secondary side of the

power transformer?

YESNO

Replace power

t r a n s f o rm e r

Replace resonator (X501)

Is operation normal?

YES

Remove power cord and plug in

again in approx. 5 seconds

Is operation lamp blinking?

Does operation start when

run/stop button on the remote

controller unit pushed?

Is transmission display of the

remote controller unit blinking?

Is "beep"sound heard from the

Is DC voltage of the PCB

module normal?

Are voltages of #62 (compressor),

#60(4 way valve) and #61 (outdoor

fan) of the micom normal? 5VDC

Is voltage of #63 (indoor fan) of the

DC5V

Is voltage at #32 terminal of the Micom norm a l ? Is voltage at #64 terminal of the Micom norm a l ?

Is voltage at #25 terminal of the

micom normal?

Are voltage at #30 and #31 of

the micom normal?

YES

main unit?

YES

micom normal?

10ms

YES

Replace

micom

10ms

100ns

0 V D C 5 V D C

YES

Normal

Refer to remote control

unit fault diagnosis

Replace PCB

module.

A re voltages at RY 7 1 ( C o m p re s s o r )

RY73(4-way valve) and SY72(outdoor fan)

n o rmal? DC12V Is voltage at SS71(indoor fan)

YES

Check connec-

tions compressor

4-way valve, out-

door fan and

indoor fan.

Is output voltage of ICO2 normal?

YES

Check PCB pattern . Replace main PCB.

Is voltage output terminal of

D101~D105(IN4007) normal?

YES

Replace

RY71, RY73,

RY72 and

SS71

Replace

ICO2

Replace IN4007

5-2

Samsung Electronics

5-2-2 When the Indoor Unit Fan Does Not Operate. (Initial Diagnosis)

1) Checklist : (1) Is the indoor unit fan motor properly connected with the connector (CN73)? (2) Is the AC voltage corre c t ? (3) Is HALL IC in indoor fan motor properly connected with the connector (CN43)? (4) Is the running capacitor properly connected with the terminal?

2 ) Troubleshooting pro c e d u re

Troubleshooting

After unplugging out the power cord should

Does the operating lamp(Green) blink?

SS71- SS71- 12V

be reconnected within five seconds.

YES

Does the Solid State Relay(SS71) work properly?

Test rod location

Is the supply voltage of the fan

motor sufficient?

YES

Normal Voltage

Check as in the procedur “NO power parts”

PCB is

out of order.

Refer tp page 5-2.

Microcomputer is out of order.

PCB should

be replaced.

Test rod location

PCB CN73 Condition

Samsung Electronics

Normal voltage

Fan operate AC 180V

YES

MF-C is out of order

Fan motor

is out of order.

Replace MFC

Fan motor should be

replaced.

5-3

+ 6 hidden pages