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10-5. EMERGENCY OPERATION

In document SERVICE MANUAL (сторінка 34-37)

10-5-1. When wireless remote controller fails or its battery is exhausted

10-5-2. When wired remote controller or indoor unit microprocessor fails

When the remote controller cannot be used

When the batteries of the remote controller run out or the remote control- ler malfunctions, the emergency operation can be done using the emer- gency buttons on the grille.

DEFROST/STAND BY lamp Operation lamp

Emergency operation switch (heating) Emergency operation switch (cooling) Receiver

Starting operation

• To operate the cooling mode, press the button for more than 2 seconds.

• To operate the heating mode, press the button for more than 2 seconds.

* Lighting of the Operation lamp means the start of operation.

Details of EMERGENCY MODE are as shown below.

Operation mode COOL HEAT

Set temperature 24°C 24°C

Fan speed High High

Air flow direction Horizontal Downward 5

Stopping operation

• To stop operation, press the button or the button .

1. When the wired remote control or the indoor unit microprocessor has failed, but all other components work properly, if you set the switch (SWE) on the indoor controller board ON, the indoor unit will begin Emergency Operation.

When Emergency Operation is activated, the indoor unit operates as follows:

(1) Indoor fan is running at high speed. (2) Drain pump is working.

* Note on the wireless remote control

When the remote control does not function, it is possible to activate.

Emergency Operation by using the indoor unit Emergency operation switch (SW1, SW2 of the wireless signal receiver board).

However, if the indoor unit microcomputer has failed, it is nesessary to proceed with points 2 and 3 below as in the case of the wired remote control.

2. When you activate Emergency operation of the cooling or heating, you have to set the switch (SWE) on the indoor controller board and activate Emergency operation of the outdoor unit.

For details on how to activate Emergency operation of the outdoor unit, refer to the outdoor unit wiring diagram.

Note: Emergency operation will not work unless outdoor unit is PU series.

3. Before you activate Emergency operation, check the following points:

(1) Emergency operation cannot be activated when:

• the outdoor unit malfunctions. • the indoor fan malfunctions.

• when the malfunction of drain pump is detected during self-diagnosing.

(2) Emergency operation becomes continuous only by switching the power source on/off.

ON/OFF on the remote control or temperature control etc. does not function.

(3) Avoid operating for a long time when the outdoor unit begins defrosting

while Emergency operation of the heating is activated, because it will start to blow cold air.

(4) Emergency cooling should be limited to 10 hours maximum (The indoor unit heat exchanger may freeze).

(5) After Emergency operation has been deactivated, set the switches etc. to their original positions.

(6) Movement of the vanes does not work in Emergency operation, therefore you have to slowly set them manually to the appropriate position.

10-6. HOW TO CHECK THE PARTS PLA-RP35/50/60/71/100/125/140BA.UK PLA-RP35/50/60/71BA

1

.UK

PLA-RP35/50/60/71/100/125/140BA#2.UK PLA-RP35/50/60/71BAR3.UK

PLA-RP71/100/125/140BA2.UK

Parts name Check points

Disconnect the connector then measure the resistance with a tester.

(At the ambient temperature of 10 - 30)

Measure the resistance between the terminals with a tester.

(Winding temperature 20)

Measure the resistance between the terminals with a tester.

Drain pump (DP)

i-see sensor (Option)

Drain float switch (FS)

(Refer to the thermistor.) Room temperature

thermistor (TH1) Pipe temperature thermistor/liquid(TH2) Condenser/Evaporator temperature thermistor (TH5)

1 3 YLW

YLW

Normal 4.3k~9.6k

Abnormal Open or short

Normal Abnormal

290 Open or short

State of moving part Abnormal

DOWN Other than open

UP

Normal Open

Short Other than short

Measure the resistance between the terminals with a tester.

(At the ambient temperature of 20 - 30) Vane motor (MV)

Vane motor for i-see sensor (Option)

Abnormal

Open or short Red - Yellow (-, -, -, -)

Red - Blue (-, -, - , -)

Red - Orange (-, -, -, -) Red - White (-, -, -, -)

Connector Normal

300

Measure the resistance between the terminals with a tester.

(At the ambient temperature of 20 - 30)

Abnormal

Open or short Red - Yellow

Red - Blue Red - Orange Red - White

Connector Normal

250

Normal

Do not disassemble corner panel with i-see sensor.

Black plastic tape

Turn on the indoor unit with the black plastic tape on the outside of i-see sensor controller board.

With electricity being turned on, measure the power voltage between connectors with tester.

i-see sensor rotates and pull out the connector of motor for i-see sensor.

Abnormal DC 1.857V ~ 3.132V Other than the normal DC 0.939V ~ 1.506V

(–)—(+) i-see sensor connector

i-see sensor (At the ambient temperature of 10 - 40)

NOTE : Be careful not to discharge static electricity into electronics.

(+)—(–) Other than the normal

4 3 2 1

4 3 1

Blue Black Pink Brown2

MV 2 1 Moving part

4 3

Switch Magnet

Moving Part Yellow

Blue Red Orange White

MV

Yellow Blue Red Orange White

0 10 20 30 40 50

-20 -10 0 10 20 30 40 50

< Thermistor for lower temperature >

Temperature ()

Resistance (k)

10-6-1. Thermistor

10-6-2. DC Fan motor (FAN MOTOR/INDOOR CONTROLLER BOARD)

Indoor controller board fuse check Notes

· High voltage is applied to the connector (CNMF) for the fan motor. Pay attention to the service.

· Do not pull out the connector (CNMF) for the motor with the power supply on.

(It causes trouble of the indoor controller circuit board and fan motor.) Self check

Symptom : The indoor fan cannot turn around.

Wiring contact check Contact of fan motor connector (CNMF)

No

No

NG

Power supply check (Remove the connector (CNMF)) Measure the voltage in the indoor controller circuit board.

TEST POINT : VDC (between 1 (+) and 4 (-) of the fan connector): VDC DC 310~340 V TEST POINT : VCC (between 5 (+) and 4 (-) of the fan connector): VCC DC 15 V

Wiring recovery

Replace the drain pump.

Replace indoor controller board.

Replace the fan motor.

Replace indoor controller board

Replace the fan motor.

Is the voltage normal?

Is there contact failure?

No

Yes Yes

No

Yes

Check the operation of fan. END NG

OK

END OK Check the operation

Check method of DC fan motor (fan motor / indoor controller circuit board)

Is the fuse normal?

Yes

Is the resistance between the terminals of drain pump normal?

Replace the fan motor.

Replace the indoor controller board.

<Thermistor Characteristic graph>

Room temperature thermistor (TH1) Pipe temperature thermistor/liquid (TH2) Condenser/evaporator temperature thermistor (TH5)

Thermistor R

0

=15kΩ ± 3%

Fixed number of B=3480 ± 2%

Rt=15exp { 3480( ) } 0˚C 15kΩ

10˚C 9.6kΩ 20˚C 6.3kΩ 25˚C 5.4kΩ 30˚C 4.3kΩ 40˚C 3.0kΩ Thermistor for lower temperature

1 273+t

1

273

In document SERVICE MANUAL (сторінка 34-37)