Fujitsu ARG18LHTBP, RDG18LHTBP, AOG24LBCA, ROG18LBCA, ARG24LHTBP Service Instruction

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SPLIT TYPE

AMP Air Conditioning

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ROOM AIR CONDITIONER

SERVICE

INSTRUCTION

Models Indoor unit Outdoor unit

AR*G18LHTBP AR*G24LHTBP

RDG18LHTBP ROG18LBCA RDG24LHTBP ROG24LBCA

DUCT

INVERTER

type

AO*G18LBCA AO*G24LBCA

R410A

CONTENTS

AMP Air Conditioning

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1. SPECIFICATIONS

1. DESCRIPTION OF EACH CONTROL OPERATION

1-1 COOLING OPERATION............................................................................................

1-2 HEATING OPERATION.............................................................................................

1-3 DRY OPERATION......................................................................................................

1-4 AUTO CHANGEOVER OPERATION........................................................................

1-5 INDOOR FAN CONTROL.........................................................................................

1-6 OUTDOOR FAN CONTROL......................................................................................

1-7 COMPRESSOR CONTROL......................................................................................

1-8 TIMER OPERATION CONTROL...............................................................................

1-9 ELECTRONIC EXPANSION VALVE CONTROL......................................................

1-10 TEST OPERATION CONTROL...............................................................................

1-11 PREVENT TO START FOR 3 MINUTES (3 MINUTES ST)....................................

1-12 4-WAY VALVE EXTENSION SELECT....................................................................

1-13 AUTO RESTART.....................................................................................................

1-14 PUMP DOWN..........................................................................................................

1-15 COMPRESSOR PREHEATING...............................................................................

1-16 10°C HEAT OPERATION...........................................................................................

01-01 01-02 01-03 01-04 01-06 01-09 01-10 01-12

01-14 01-14 01-14 01-14 01-14 01-15 01-16 01-16

1-17 ECONOMY OPERATION........................................................................................

1-18 DEFROST OPERATION CONTROL.......................................................................

1-19 OFF DEFROST OPERATION CONTROL...............................................................

1-20 VARIOUS PROTECTIONS......................................................................................

1-21 AUTOMATIC AIRFLOW ADJUSTMENT... ................................................................

1-22 DRAIN PUMP OPERATION ...................................................................................

2. TROUBLE SHOOTING

2-1 ERROR DISPLAY......................................................................................................

2-2 TROUBLE SHOOTING WITH ERROR CODE 2-3 TROUBLE SHOOTING WITH NO ERROR CODE 2-4 SERVICE PARTS INFORMATION

............................................................................

..........................................................

....................................................

01-16 01-17

01-19 01-20

01-21 01-22

02-01 02-02 02-35 02-40

DUCT type

AMP Air Conditioning

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R410A

INVERTER

1 . DESCRIPTION OF EACH CONTROL OPERATION

1-1. COOLING OPERATION

AMP Air Conditioning

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1-1-1 COOLING CAPACITY CONTROL

A sensor (room temperature thermistor) built in the indoor unit will usually perceive difference or variation between a set temperature and present room temperature, and controls the operation frequency of the compressor. * If the room temperature is 6.0°C higher than a set temperature,

the compressor operation frequency will attain to maximum performance.

* If the

room temperature is 1.0°C lower than a set temperature, the compressor

will be stopped. * When the room temperature is between +6.0°C to -1.0°C of the setting temperature,

the compressor frequency is controlled within the range shown in Table1. However, the maximum frequency is limited in the range shown in Fig.1 based on the fan speed mode and the outdoor temperature.

( Table 1 : Compressor Frequency Range )

minimum frequency

10rps 120rps

maximum frequency

( Fig. 1 : Limit of Maximum Frequency based on Outdoor Temperature )

Outdoor air temperature

34°C

30°C

19°C

10°C

0°C

A zone

B zone

C zone

D zone

E zone

F zone

When the room temperature rises

36°C

32°C

21°C

12°C

2°C

Fan speed mode

Model 18

Model 24

A zone B zone C zone D-F zone

Hi Me Lo Qu

102rps 102rps 60rps 51rps 111rps 111rps 80rps 62rps

55rps 55rps 49rps 43rps 43rps 37rps 67rps 67rps 56rps 47rps 47rps 40rps

49rps 49rps

56rps 56rps

34rps 34rps 34rps 25rps 34rps 34rps 34rps 25rps

When the room temperature drops

01-01

1-2. HEATING OPERATION

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* If the room temperature is lower 6.0°C than a set temperature,

the compressor operation frequency will attain to maximum performance.

* If the room temperature is higher 1.0°C than a set temperature, the compressor

will be stopped.

* When the room temperature is between +1.0°C to -6.0°C of the setting temperature,

the compressor frequency is controlled within the range shown in Table2.

( Table 2 : Compressor Frequency Range )

minimum frequency

maximum frequency

12rps

120rps

01-02

1-3. DRY OPERATION

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1-3-1 INDOOR UNIT CONTROL

The compressor rotation frequency shall change according to set temperature and room temperature variation which the room temperature sensor of the indoor unit has detected as shown in the Table 3.

( Table 3 : Compressor frequency )

Operating frequency

X zone J zone

34rps

0rpsY zone

( Fig.2 : Compressor Control based on Room Temperature )

Room Room temperature temperature

Ts+1.5°C

X zone

Ts+0.5°C

J zone

Ts-1.5°C

Y zone

( Fig.3 : Indoor Fan Control )

Ts-0.5°C

Ts : Setting temperature

Compressor

OFF

Setting air flow

S-Lo

OFF

10 30 60 360 120 360 120 10 30 (sec)

01-03

1-4. AUTO CHANGEOVER OPERATION

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When the air conditioner is set to the Auto mode by remote controller, operation starts in the optimum mode from among the Heating, Cooling, and Monitoring mode. During operation, the optimum mode is automatically switched in accordance with temperature changes. The temperature can be set between 18°C and 30°C in 0.5°C (wireless and 2WIRE remote controller) Or 1.0°C (3WIRE remote controller) steps.

When operation starts, indoor fan and outdoor fan are operated for around 1 minutes.

Room temperature and outdoor temperature are sensed, and the operation mode is selected in accordance with the table below. <Monitoring mode>

( Table 4 : Operation mode selection table )

Room temperature (TR)

Operation mode

TR : Room temperature Ts : Setting temperature

TR> Ts+2°C

Ts+2°C TR Ts -2°C

TR < Ts -2°C Heating

Cooling

*Middle zone

*If it's Middle zone, operation mode of indoor unit is selected as below.

(1). Same operation mode is selected as outdoor unit.

If outdoor unit is operating in Cooling and Heating mode, indoor unit will be operated by the same operation mode.

(2). Selected by the outdoor temperature.

If outdoor unit is operating in other than Cooling and Heating mode, indoor unit will be operated according to the outdoor temperature as below.

( Fig.4 : Outdoor temperature zone selection )

Temperature

°C and over

25°C under

When the compressor was stopped for 6 consecutive minutes by the temperature control function after the Cooling or Heating mode was selected at above, operation is switched to Monitoring and the operation mode is selected again.

Mode

Cooling Heating

When the middle zone is selected on the predetermining of the operation mode, the operation mode before the changing to the monitor mode is selected.

01-04

AUTO CHANGEOVER operation flow chart

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START

Monitor mode

TS : Setting temperature

Room temp.

Ts+2

°C?

Room temp.

°C?

Ts -2

Middle zone

Auto change over is

second or more?

YES

Operation mode

before the monitor mode is

cooling mode?

YES

Thermostat remains

in OFF state for 6 minutes or

longer?

YES

System stops

or operation command other than

auto changeover operation?

Operation mode of

outdoor unit : Cooling?

YES

Operation mode of outdoor unit

YES

: Heating?

Outdoor temperature<

25°C?

01-05

YES

COOLING OPERATIONHEATING OPERATION

Thermostat remains

in OFF state for 6 minutes or

longer?

System stops

or operation command other than

auto changeover operation?

YES

1-5. INDOOR FAN CONTROL

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1. Fan speed

( Table 5 : Standard of Indoor Fan Speed )

*The following fan speed is a standard value. (Static pressure 35Pa)

Operation mode

Heating

Cooling / FAN

FAN S-Lo

Dry

Air flow mode

HIGH

MED

LOW Quiet HIGH

MED

LOW Quiet

Soft Quiet

Speed (rpm)

Model 18

820 660 590 520 820 660 590 520 480 350 520

Model 24

1130

930 780 680

1130

930 780 680 560 420 680

2. FAN OPERATION

The airflow can be switched in 4 steps such as AUTO, QUIET, LOW, MED, HIGH, while the indoor fan only runs.

When [AUTO] is selected, the indoor fan motor runs MED.

3. COOLING OPERATION

Switch the airflow [AUTO], and the indoor fan motor will run according to a room temperature, as shown in Fig.5. On the other hand, if switched in [HIGH] ~ [LOW], the indoor motor will run at a constant airflow of [COOL] operation modes LOW, MED, HIGH,as shown in Table 5.

( Fig.5 : Airflow change - over ( Cooling : AUTO ) )

When the room temperature rises

TR : Room temperature Ts : Setting temperature

TR-Ts > 2°C

2°C > TR-Ts > 1°C

1°C > TR-Ts

HIGH mode

MED mode

LOW mode

When the room temperature drops

TR-Ts > 2.5°C

2.5°C > TR-Ts > 1.5°C

1.5°C > TR-Ts

*1 : Contains a condition to the following

When the operation mode is set to AUTO mode at the start of operation. When the setting temperature was changed. When the operation mode was changed to COOLING mode. When the airflow mode was changed to AUTO mode.

01-06

4. HEATING OPERATION

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Switch the airflow [AUTO], and the indoor fan motor will run according to a room temperature, as shown in Fig.6.

On the other hand, if switched in [HIGH] ~ [LOW], the indoor motor will run at a constant airflow of [HEAT] operation modes LOW, MED, HIGH, as shown in Table5.

( Fig.6 : Airflow change - over ( Heating : AUTO ) )

Indoor heat exchanger temperature

TR-Ts > -1.0°C

1.0°C > TR-Ts > -2.0°C

-2.0°C > TR-Ts

LOW mode

MED mode

TR-Ts > -1.5°C

-1.5°C > TR-Ts > -2.5°C

HIGH mode

-2.5°C > TR-Ts

5. COOL AIR PREVENTION CONTROL (Heating mode)

The maximum value of the indoor fan speed is set as shown in Fig.7, based on the detected temperature by the indoor heat exchanger sensor on heating mode. When the compressor does not operate, the indoor fan motor operates [S-Lo] mode.

( Fig.7 : Cool Air Prevention Control )

I Indoor heat exchanger t temperature

SETTING FAN MODE

37°C

ndoor heat exchanger emperature

27°C

SETTING FAN MODE

Lo mode*

29°C

13 min. later

24°C

S-Lo

6. DRY OPERATION

Refer to the table 5. During the dry mode operation, the fan speed setting can not be changed.

Lo mode*

*On the Quiet mode, the Quiet mode is kept*On the Quiet mode, the Quiet mode is kept. .

01-07

7. FAN CONTROL FOR ENERGY SAVING

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When the air flow setting except AUTO mode, the indoor fan motor will run as shown in Fig.8.

( Fig 8 : Indoor Fan Control)

Compressor

OFF

Indoor fan Setting air flow

480rpm

S-Lo

OFF

10 30 60 180 60 180 60 10 30

( Factory setting)

Setting Description Function Number Setting Value

Disable Enable

Remote controller

00 01

00 : When the outdoor unit is stopped, the indoor unit fan operates continuously following the setting on the remote controller.

01 : When the outdoor unit is stopped, the indoor unit fan operates intermittently at a very low speed. 02 : Enable or disable this function by remote controller setting.

Set to “00”or “01”when connecting a remote controller that cannot set the Fan control for energy saving function or connecting a network converter.

To confirm if the remote controller has this setting, refer to the operating manual of each remote controller.

(sec)

01-08

1-6. OUTDOOR FAN CONTROL

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1. Outdoor Fan Motor

ollow

ing table shows the fan speed of the outdoor unit.

( Table 6

: Fan speed of the outdoor unit )

Cooling

Heating

Normal Normal S-Hi2 S-Hi1

Hi3 Hi2

Hi1 Me2 Me1

Lo2 Lo1

Zone control (rps:Compressor frequency)

1) Cool / Heat (Normal)

72rps 43rps

37rps 27rps

15rps

1100 1100 1100 1100

1100

870 870 720 500 500

1050

780 720 590 590 480

Hi2 Hi1

Me2 Me1

Lo2 Lo1

Dry

Normal

530

Low ambient cooling / Dry

F zone G zone

430

350

370

300

68rps 40rps 35rps

24rps 15rps

260

H zone

250

200

2) Dry (Nomal)

19rps and over [ Hi 1 ] 16rps and over [ Me 1 ] 16rps under [ Lo 1 ]

Ambient Temperature zone

D zone(Normal 1)

21°C

D zone(Normal 2)

12°C

F zone

2°C

G zone

-8°C

H zone

19°C

10°C

0°C

-10°C

3) Cool / Dry / F zone

51rps and over [ Hi 1 ] 43rps and over [ Me 1 ] 43rps under [ Lo 1 ]

4) Cool / Dry / G zone

51rps and over [ Hi 1 ] 43rps and over [ Me 1 ] 43rps under [ Lo 1 ]

5) Cool / Dry / H zone

43rps and over [ Hi 1 ] 34rps and over [ Me 1 ] 34rps under [ Lo 1 ]

01-09

1-7. COMPRESSOR CONTROL

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1. OPERATION FREQUENCY RANGE

The operation frequency of the compressor is different based on the operation mode as shown in Table 7.

(Table 7 : Compressor Operation Frequency Range)

Cooling / Dry Heating

Min

Max Min Max

12rps10rps 120rps

120rps

2. OPERATION FREQUENCY CONTROL AT START UP

The compressor frequency soon after the start-up is controlled as shown in Fig.9.

(Fig.9 : Compressor Control at Start-up)

Normal start-up

Frequency Frequency

Frequency Frequency Frequency

Time 1

Time 2 Time 3

Time 4

Time 5

(Frequency)

Frequency Frequency Frequency

35rps 53rps 66rps 82rps 106rps

Frequency

(Time)

Time 1

80sec 160sec 300sec 440sec 500sec

Time 2 Time 3 Time 4 Time 5

Frequency

01-10

1-8. TIMER OPERATION CONTROL

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1-8-1 Wired Remote Controller

UTY-RNR*Z1(2 wire remote controller)

ON / TIMER OFF / TIMER

WEEKLY TIMER

*3 wire remote controller can be connected

If 3 wire remote controller is connected, set the DIP-SW on the controller PCB Refer to the installation manual for detailed. If used in combination with wireless and wired remote controller, the following function is limited.

Sleep timer Timer 10°C heat operation

1. ON / OFF TIMER

OFF timer : When the clock reaches the set time, the air conditioner will be turned off.

Operation mode

Stop mode

Set time of timer

ON timer : When the clock reaches the set time, the air conditioner will be turned on.

Operation mode

Stop mode

Set time of timer

2. WEEKLY TIMER

2-1. WEEKLY TIMER

Use this timer function to set operating time for each day of the week. The weekly timer allows up to two ON and OFF time to set up per day.

Operation mode

Stop mode

Operation mode

Stop mode

Operation mode

Stop mode

Set time

The operating time can be set in 30 min increments only. The OFF time can be carried over to next day. The ON timer and the OFF timer functions cannot be set with using the weekly timer.

Both ON and OFF time must be set.

Set time Set time Set time

01-11

2-2. DAY OFF setting

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The DAY OFF setting is only available for days for which weekly settings already exist. If the operating time carries over to the next day (during a next day setting), the effective

DAY OFF range will be set as shown below.

Normal

DAY OFF

Operation mode

Stop mode

Preceding day Next day

Setting day

Stop mode

Next day setting

DAY OFF

Operation mode

Stop mode

Operation mode

Stop mode

Preceding day Next daySetting day

The DAY OFF setting can only be set one time. The DAY OFF setting is cancelled automatically after the set day has passed.

01-12

1-8-2 Wireless Remote Controller (OPTION)

AMP Air Conditioning

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AR- REJ1E

ON / TIMER OFF / TIMER

PROGRAM TIMER

SLEEP TIMER

1. ON / OFF TIMER

OFF timer : When the clock reaches the set time, the air conditioner will be turned off.

Operation mode

Stop mode

Set time of timer

ON timer : When the clock reaches the set time, the air conditioner will be turned on.

Operation mode

Stop mode

Set time of timer

2. PROGRAM TIMER

The program timer allows the OFF timer and ON timer to be used in combination one time.

Operation mode

Stop mode

Set time

Operation will start from the timer setting (either OFF timer or ON timer) whichever is closest to the clock's current timer setting. The order of operations is indicated by the arrow in the remote control unit's display.

SLEEP timer operation cannot be combined with ON timer operation.

Operation mode

Stop mode

Set time Set time Set time

Operation mode

Stop mode

01-13

3. SLEEP TIMER

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If the sleep timer is set, the room temperature is monitored and the operation is stopped automatically. If the operation mode or the set temperature is change after the sleep timer is set, the operation is continued according to the changed setting of the sleep timer from that time ON.

In the COOLING operation mode

When the sleep timer is set, the setting temperature is increased 1 degC. It increases the setting temperature another 1 degC after 1 hour. After that, the setting temperature is not changed and the operation is stopped at the time of timer setting.

Set temperature rises

( Ts : Set temperature )

Stop of operation

+2°C +1°C

Set

60min

In the HEATING operation mode

When the sleep timer is set, the setting temperature is decreased 1 degC. It decreases the setting temperature another 1 degC every 30 minutes. Upon lowering 4 degC, the setting temperature is not changed and the operation stops at the time of timer setting.

Set temperature lowers

( Ts : Set temperature )

-1°C

-2°C

-3°C

-4°C

Stop of operation

Set

30min

60min

90min

01-14

1-9. ELECTRONIC EXPANSION VALVE CONTROL

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The most proper opening of the electronic expansion valve is calculated and controlled under the present operating condition based on the following values. The compressor frequency, the temperatures detected by the discharge temperature sensor and the outdoor temperature sensor.

The pulse range of the electronic expansion valve control is 52 ~ 480 pulses (Cooling) and 52 ~ 480 pulses (Heating).

At the time of supplying the power to the outdoor unit, the initialization of the electroni expansion valve is operated (528 pulses are input to the closing direction).

1-10. TEST OPERATION CONTROL

With Wired Remote Controller

Touch the [Test run] in the “Maintenance” screen.

(Installer password* is required.)

The “Test Run” screen is displayed. Touch [OK] to return to the Maintenance screen, and start the test run. The test run will automatically end is approximately 60 min. If you wish to cancel the test run before it is complete, return to the “Monitor Mode screen”, and touch the On/Off button.

*If the password has been changed from the default setting “0000”, please contact the installer.

With Wireless Remote Controller

Under the condition where the air conditioner runs, press the TEST RUN button, and the test operation control mode will appear. During test running, the Operation LED and Timer LED of the air conditioner body blinks simultaneously. Set the test operation mode, and the compressor will continue to run regardless of whether the room temperature sensor detects. The test operation mode is released if 60 minutes have passed after setting up the test operation.

1-11. PREVENT TO RESTART FOR 3 MINUTES ( 3 MINUTES ST )

The compressor won't enter operation status for 3 minutes after the compressor is stopped, even if any operation is given.

1-12. 4-WAY VALVE EXTENSION SELECT

At the time when the air conditioner is switched from the cooling mode to heating mode, the compressor is stopped, and the 4-way valve is switched in 3 minutes later after the compressor stopped.

01-15

1-13. AUTO RESTART

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When the power was interrupted by a power failure, etc. during operation, the operation contents at that time are memorized and when power is recovered, operation is automatically resumed with

the memorized operation contents. When the power is interrupted and recovered during timer operation, timer operation is canceled, but only setting time is memorized.

[Operation contents memorized when the power is interrupted]

Operation mode Set temperature Set air flow Timer mode and timer time (Set by wireless remote controller) 10°C HEAT (Wireless remote controller is in use) ECONOMY

Energy saving setting Each central setting

1-14. PUMP DOWN

01-16

1-15. COMPRESSOR PREHEATING

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When the outdoor temperature is lower than 0°C and the all operation mode has been stopped for 30 minutes, power is applied to the compressor and the compressor is heated. (By heating the compressor, warm air is quickly discharged when operation is started.) When operation was started and when the outdoor temperature rises to 25°C or greater, preheating is ended.

1-16. 10°C HEAT OPERATION

The 10°C HEAT operation The 10°C HEAT The 10°C HEAT

( Table9 )

Mode Heating Setting temperature 10°C Fan mode AUTO

operation can be set by the wireless remote controller. operation is almost the same operation as below settings.

functions by pressing 10°C.HEAT button on the remote controller.

1-17. ECONOMY OPERATION

The ECONOMY operation functions by pressing ECONOMY button on the remote controller. The ECONOMY operation is almost the same operation as below settings.

( Table10)

Mode Cooling/ Dry Heating Target temperature Setting temp.+1°C Setting temp.-1°C

01-17

1-18. DEFROST OPERATION CONTROL

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1. CONDITION OF STARTING THE DEFROST OPERATION

The defrost operation starts when the outdoor heat exchanger temperature sensor (Tn) detects the temperature lower than the values shown in Table11.

( Table 11 : Condition of starting Defrost Operation )

1 time defrosting after starting operation

Less than 22 min. 22 to 62 min. More than 62 min.

Compressor integrating operation time

Does not operate

Defrosting after 2 time

upon starting operation

Tn10 : Temperature of continuous operation at 10minutes. Tnb : Back 5minutes temperature

Integrating defrost (Constant monitoring)

*1 : If the compressor continuous operation time is less than 10 minutes, the OFF number of the compressor is counted.

If any defrost operated, the compressor OFF count is cleared.

More than 240 min. (For long continuous operation)

Compressor integrating operation time

Less than 35 min. More than 35min.

Does not operate

Compressor integrating operation time

- 3°C

- 9°C - 5°C

Tn-Tn10 < - 5deg Tn-Tnb < - 2deg

However, Tn < - 6°C

OFF count of the compressor 40 times.

Less than 10min.*1 (For intermittent operation)

2. CONDITION OF THE DEFROST OPERATION COMPLETION

Defrost operation is released when the conditions become as shown in Table12.

( Table12 : Defrost Release Condition )

Release Condition

Outdoor heat exchanger temperature sensor value is higher than

+13°C or Compressor operation time has passed 15 minutes.

01-18

3. Defrost Flow Chart

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The defrosting shall proceed by the integrating operation time, outdoor temperature and outdoor heat exchanger temperature as follows.

Heating operation start : Compressor ON

(Not defrosted for 10 minutes)

1st defrost

Compressor integrating operation: Over 22 min.

Outdoor heat exchanger temperature: Below - 9°C

Compressor

integrating

operation:

Over 62 min.

Outdoor heat exchanger temperature: Below - 5°C

2nd and later defrost Integrating defrost

(Constant monitoring)

Compressor integrating operation: Over 35 min.

Tn-Tn10 < - 5deg Tn-Tnb < - 2deg However, Tn <- 6°C

Defrost start

Compressor OFF count : 40 times (Less than 10min.)

Compressor integrating operation: Over 240 min.

Outdoor heat exchanger temperature: Below - 3°C

Defrost Indicator: [Operation lamp] 6 sec ON / 2 sec OFF

Compressor OFF Outdoor fan motor OFF 30 sec later four - way valve OFF 35 sec later compressor ON

Outdoor heat exchanger temperature:

Over +13°C

Compressor ON time: Maximum 15 minutes

Defrost end

01-19

1-19. OFF DEFROST OPEARTION CONTROL

AMP Air Conditioning

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When operation stops in the [Heating operation] mode, if frost is adhered to the outdoor unit heat exchanger, the defrost operation will proceed automatically. In this time, if indoor unit operation lamp flashes slowly (7 sec ON / 2 sec OFF), the outdoor unit will allow the heat exchanger to defrost, and then stop.

1. OFF DEFROST OPERATION CONDITION

In heating operation, the outdoor heat exchanger temperature is less than -4°C, compressor continuous operation more than 10 minutes, and compressor operation integrating time lasts for more than 30 minutes.

2. OFF DEFROST END CONDITION

Release Condition

Outdoor heat exchanger temperature sensor value is higher than +13°C or Compressor operation time has passed 15 minutes.

OFF Defrost Flow Chart

Heating operation stop

Outdoor heat exchanger temperature : Below -4°C Compressor continuous operation : Over 10 minutes Compressor integrating operation :

Over 30 minutes

Defrost start

Defrost Indicater: [Operation lamp] 6 sec ON / 2 sec OFF

Outdoor heat exchanger temperature :

Over +13°C

Compressor ON time : Maximum 15 minutes

Defrost end

01-20

1-20. VARIOUS PROTECTIONS

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1. DISCHARGE GAS TEMPERATURE OVERRISE PREVENTION CONTROL

The discharge gas thermosensor (discharge thermistor : Outdoor side) will detect discharge gas temperature.

When the discharge temperature becomes higher than Temperature ,the compressor frequency is decreased 20rps, and it continues to decrease the frequency for 20rps every the temperature becomes l

ower than Temperature .

When the discharge temperature becomes lower than Temperature , the control of the compressor frequency is released.

When the discharge temperature becomes higher than Temperature ,the compressor is stopped and the indoor unit LED starts blinking.

(Table14 : Discharge Temperature Over Rise Prevention Control / Release Temperature)

120 seconds until

Temperature

104°C 101°C 110°C

2. CURRENT RELEASE CONTROL

The compressor frequency is controlled so that the outdoor unit input current does not exceeds the current limit value that was set up with the outdoor temperature. The compressor frequency returns to the designated frequency of the indoor unit at the time when the frequency becomes lower than the release value.

( Table 15 : Current release operation value / release value )

Model 18

[ Heating ]

OT (Control / Release)

7.0A / 6.5A

17°C

9.0A / 8.5A

12°C

10.5A / 10.0A

5 °C

12.0A / 11.5A

[ Cooling ]

OT (Control / Release)

50°C 46°C 40°C

4.5A / 4.0A

6.0A / 5.5A

8.5A / 8.0A

OT : Outdoor Temperature

Model 24

[ Heating ]

OT (Control / Release)

10.5A / 10.0A

17°C

13.0A / 12.5A

12°C

15.0A / 14.5A

5 °C

17.0A / 16.5A

OT : Outdoor Temperature

[ Cooling ]

OT (Control / Release)

50°C 46°C 40°C

OT : Outdoor Temperature

7.0A / 6.5A

9.5A / 9.0A

12.0A / 11.5A

01-21

3. ANTIFREEZING CONTROL (Cooling and Dry mode)

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The compressor frequency is decrease on cooling & dry mode when the indoor heat exchanger temperature sensor detects the temperature lower than Temperature . Then, the anti-freezing control is released when it becomes higher than Temperature .

(Table 16 : Anti-freezing Protection Operation / Release Temperature)

Outdoor temperature

Over than 10°C or 12°C *2

Less than 10°C *1 or 12°C *2

*1. When the temperature rises. *2. When the temperature drops.

Temperature Temperature

4°C

7°C

13°C

4. COOLING PRESSURE OVERRISE PROTECTION

When the outdoor unit heat exchange sensor temperature rises to 67°C or greater, the compressor is stopped and trouble display is performed.

5. INDOOR UNIT FAN MOTOR OVER TEMPERATURE PROTECTION

When satisfy the following conditions, the protection works.

a) After the 90 seconds from the fan operation, detect less than 300 rpm for 10 seconds. b) IPM trip protection works. c) Current overload protection works.

When detecting the above condtion, recheck the condition after 6 minutes. When count the twice, the protection works

Protection contents Reduce the static pressure 20 Pa When it does not dissolve even the minimum static pressure condition, work the following operation

a) Fan motor error displayed b) Fan stop 40 secounds c) Fan stop 50 secounds

01-22

1-21. AUTOMATIC AIRFLOW ADJUSTMENT FUNCTION

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The unit automatically sets the static pressure.

This setting can be used by the function setting 26.

The static pressure is calculated by the input current and voltage of the motor and the return air temperature.

*For the setting method, refer to the technical manual.

NOTE

Be sure to conduct this setting before any other operation. If the motor is warm or the heat exchanger is wet, false and detection may lead to incorrect adjustments. Check if the electrical wirings and duct installations are complete. If there is a damper installed in the system, make sure the damper is open. Check if the air filter(optional) is attached. If there are several inlet, outlet ports, make sure the airflow rates of each port match the designed airflow rate by adjusting the throttles.

Automatic airflow adjustment is possible by the following procedures.

1) Change Function 26 to "Automatic airflo

2) Run the air conditioner on Fan mode (High).

* For instructions on how to operate the air conditioner, refer to the operation manual of the remote controller. Automatic During airflow ajustment, the mode will be fixed at Fan mode(High). When this function is active, do not operate the Outdoor unit.

When the setting is performing, Test mode display: 3-Wire RC/ Maintenance dispaly: 2-Wire RC will be shown on the remote controller panelle.

w adjustment (32)".

3) The air conditioner will run for about 1 to 8 min. then stop automatically. * Do not change the throttles of the inlet and outlet ports during operation. When used in a Group control system, the setting will take about 10 min. When the Error code 15.4 (Automatic Air flo Refer to the Trouble shooting Error code15

4) Turn the air conditioner off and on again.

5) Check the setting value of Function 26 and take note of the setting value. * If the setting value has not changed, repeat the procedure from step 2.

w Adjustment Error) appears, the setting is not completed.

01-23

1-22. DRAIN PUMP OPERATION

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During Cooling / Dry mode

1. When the compressor starts, the drain pump starts simultaneously.

2. The drain pump operates continuously for 3 minutes after the compressor is turned off as show in Fig15.

3. When the compressor stops by the "Anti- freezing protection", the drain pump is turned off in 1 hour after the compressor stops.

4. When the water level in the drain pan rises up and then the float switch functions:

The compressor, indoor and outdoor fan motor operation are stopped.

Drain pump operates continuously for 3 minutes after the float switch is turned off. (Almost condensing water may be drained)

The indoor unit fan motor operates after the float switch is turned off.

5. When the float switch turns ON continuously for 3 minutes, "FAILURE INDICATION" operates.

(It is necessary to turn off power for release it. )

6. When the float switch turns OFF less than 3 minutes, the unit starts Cooling operation.

(Fig 15 : Detail of Drain Pump Operation)

3 minutes3 minutes

10 minutes 60 minutes

180 minutes

Drain Pump

OFF

Start

(0 minutes)

Less than 3 minutes

Float Switch

Compressor

Indoor Fan

Drain Pump

During Heating / Fan mode / Stop operation

ON OFF

3 minutes ST

ON OFF

3 minutes

1.When the water level in the drain pan rises up and then the float switch functions:

Drain pump operates continuously for 3 minutes after the float switch is turned off.

(Almost condensing water may be drained)

2. When the float switch turns ON continuously for 3 minutes, "FAILURE INDICATION" operates.

Thereafter, even if the float switch turns OFF, the "FAILURE INDICATION" is not released. (It is necessary to turn off power for release it. )

3 minutes3 minutes

Float Switch

Drain Pump

ON OFF

3 minutes

01-24

DUCT type

AMP Air Conditioning

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R410A

INVERTER

2 . TROUBLE SHOOTING

2 ERROR DISPLAY

AMP Air Conditioning

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2-1 WIRED REMOTE CONTROLLER DISPLAY

1. Check the error

1. If an error occurs, an error icon appears on the “Monitor mode screen”. Touch the [Status] on the “Monitor mode screen”.The “Status” screen is displayed.

2. Touch the [Error Information] on the “Status”screen. The “Error Information”screen is displayed. (If there are no errors, the [Error Information] will not be displayed.)

3. 2-digit numbers correspond to the error code in the table below. Touch the [Next page] (or [Previous page]) to switch to other connected indoor units.

1. 2. 3.

Mode Set Temp.

Status

Fri 10:00AM

Fan

Status Air Flow Direction

VT [ 1 ] Individual

[ ] Economy [ Off ]

Monitor Back

For the details of the indoor unit or outdoor unit error , refer to the error codes in each installation manual

Page 1/ 4

Error Information

Address [ 02 01 ]

Error Code [ 14 . 15, 41 . 44 ]

Page 1/ 5

Error Contents

Serial Communication Error Wired Remote Controller

Communication Error

Automatic Air flow Adjustment Error

External communication Error

Combination Error

Indoor unit address setting Error

Connection unit number Error (Indoor unit Wired remote controller Error)

Indoor unit PCB model information Error

Indoor unit motor electricity consumption detection Error

Indoor unit power supply Error for fan motor

Indoor unit Communication circuit (wired remote controller) Error

Error Code

Trouble shooting

1,2

932

Error Contents

PFC circuit Error

Trip terminal L Error

Discharge Thermistor Error

Compressor Thermistor Error Heat Ex. Liquid Outlet

Thermistor Error

Outdoor Thermistor Error

Heat Sink Thermistor Error

Current sensor Error

Pressure sensor Error

Trip detection Compressor rotor position

detection Error

Error Code

Trouble shooting

Indoor Room Thermistor Error

Indoor Heat Ex. Thermistor Error

Indoor Unit Fan Motor Error

Drain pump Error

Outdoor unit main PCB model information error

Inverter Error

Outdoor Unit Fan Motor Error

4-way Valve Error

Discharge Temp. Error

Compressor Temp. Error

02-01

2-2 TROUBLE SHOOTING WITH ERROR CODE

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Trouble shooting 1

Indicate or Display:

OUTDOOR UNIT Error Method:

Serial communication error

Error code : 11

(Serial Reverse Transfer Error)

Detective Actuators:

Outdoor unit Main PCB Outdoor unit fan motor

Detective details:

When the indoor unit cannot receive the serial signal from Outdoor unit more than 2minutes after power ON, or the indoor unit cannot receive the serial signal more than 15seconds during normal operation.

Forecast of Cause:

1. Connection failure 2. External cause 3. Main PCB failure 4. Outdoor unit fan motor failure

Check Point 1-1 : Reset the power and operate

Does Error indication show again?

YESYES

Check Point 2 : Check Connection

Check any loose or removed connection line of Indoor unit and Outdoor unit.

>> If there is an abnormal condition, correct it by referring to Installation Manual or Data & Technical Manual.

Outdoor unit : No indication

Check Point 1-2: Check external cause such as noise

Check the complete insulation of the grounding. Check if there is any equipment that causes harmonic wave

near the power cable (Neon light bulb or any electronic equipment which causes harmonic wave).

Check Point 3 : Check the voltage of power supply

Check the voltage of power supply

>> Check if AC198V (AC220V -10%) - 264V (AC240V +10%) appears at Outdoor Unit Terminal L - N.

Check Point 4 : Check Serial Signal (Reverse Transfer Signal)

Check Serial Signal (Reverse Transfer Signal)

>> Check if Indicated value swings between AC90V and AC270V at Outdoor Unit Terminal L - 3. >> If it is abnormal, Check Outdoor unit fan motor (PARTS INFORMATION 5)

>> If Outdoor fan motor is abnormal, replace Outdoor unit fan motor and Main PCB. >> If Outdoor fan motor is normal, replace Main PCB.

RED BLACK WHITE

3 L N

02-02

Trouble shooting 2

AMP Air Conditioning

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Indicate or Display:

INDOOR UNIT Error Method: Serial Communication Error

Error code : 11

(Serial Forward Transfer Error) Detective Actuators: Detective details:

Indoor unit Controller PCB

When the outdoor unit cannot properly receive the serial signal from indoor unit for 10 seconds or more.

Forecast of Cause:

1. Connection failure 2. External cause 3. Controller PCB failure

Outdoor unit : No indication

Check Point 1-1 : Reset the power and operate

Does error indication reappear?

YESYES

Check Point 2 : Check connection

Check any loose or removed connection line of between indoor unit and outdoor unit.

>> If there is an abnormal condition, correct it by referring to Installation Manual or Data & Technical Manual.

Check connection condition in control unit. (If there is loose connector, open cable or mis-wiring)

Check Point 1-2 : Check external cause such as noise

Check Point 3 : Check the voltage of power supply

Check the voltage of power supply

>> Check if AC198V(AC220V-10%) - 268V(AC240V+10%) appears

at outdoor unit terminal L - N.

Check if the ground connection is proper. Check if there is any equipment that causes harmonic wave near the power cable (Neon light bulb or any electronic equipment which causes harmonic wave).

Check Point 4 : Check serial signal (Forward transfer signal)

Check serial signal (Forward transfer signal)

>> Check if indicated value swings berween AC30v and AC130V at outdoor unit terminal 2 - 3. >> If it is abnormal, replace Controller PCB.

BLACK WHITE RED BLACK WHITE

1 2

3 L

02-03

Trouble shooting 3

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INDOOR UNIT Error Method:

Wired Remote Controller

Indicate or Display:

Error code : 12

Outdoor unit : No indication

Communication Error

Detective Actuators: Detective details:

Indoor unit Controller PCB Wired Remote Controller

When the indoor unit cannot properly receive the signal from Wired Remote Controller for 1 minute or more.

Forecast of Cause:

1. Connection failure 2. Wired Remote Controller failure 3. Controller PCB failure

Check Point 1 : Check the connection of terminal

After turning off the power, Check & correct the followings.

Check the connection of terminal berween Wired Remote Controller and indoor unit, and check if there is a disconnection of the cable.

Check Point 1-2 : Check Wired Remote Controller and Controller PCB

Ceck Voltage at CN14 of Controller PCB. (Terminal 1-3, Terminal 1-2) (Power supply for the Remote Control)

>> If it is DC13V, Remote Control is failure. (Controller PCB is normal) >> Replace Remote Control >> If it is DC 0V, Controller PCB is failure. (Check Remote Control once again) >> Replace Controller PCB

Check Point 2 : Wire installation Wrong RCgroup setting

Wrong wire connection in RCgroup (Please refer to the installation manual)

The number of connecting indoor unit and Remote controller in one RCgroup were less than 32 units.

Check Point 2-1 : Check Indoor unit controller PCB

Check if controller PCB damage

Change controller PCB and check the Error after setting remote controller address

02-04

Trouble shooting 4

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INDOOR UNIT Error Method:

Automatic Air flow Adjustment Error

Indicate or Display:

Error code : 15

Outdoor unit : No indication

Detective Actuators:

Indoor unit controller PCB

Detective details:

On automatic airflow adjustment operation, when the fan speed other than 0rpm is detected at the 0rpm operation. On automatic airflow adjustment operation, when the fan speed is not reach the target speed, after 2 minutes from the fan started. On automatic airflow adjustment operation operation, when the 750W of input power is detected.

Forecast of Cause:

1. Fan rotation failure 2. Fan motor winding open 3. Indoor unit controller PCB

Check Point 1 : Check rotation of Fan

Rotate the fan by hand when operation is off. (Check if fan is caught, dropped off or locked motor)

>>If Fan or Bearing is abnormal, replace it.

Check Point 2 : Check ambient temp. around motor

Check excessively high temperature around the motor. (If there is any surrounding equipment that causes heat)

>>Upon the temperature coming down, restart operation.

Check Point 3 : Check Indoor unit fan motor

Checl Indoor unit fan motor. (PARTS INFORMATION 4)

>>if Indoor unit fan motor is abnormal, replace Indoor unit fan motor.

Check Point 4 : Replace Controller PCB

If Check Point 1- 3 do not improve the symptom, replace Controller PCB.

02-05

Trouble shooting 5

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INDOOR UNIT Error Method: External communication error

Indicate or Display:

Error code : 18

Outdoor unit : No indication

Detective Actuators:

External communication error

Detective details:

After receiving a signal from the external I/O PCB, the same a signal has not been received for 15sec

Forecast of Cause :

1. Connection failure 2.External I/O PCB failure 3.Controller PCB failure

Check Point 1 : Check the connection

Check any loose or removed connection of between the controller PCB to the external I/OPCB

>>If there is an abnormal condition, correct it by refer to installation manual or the technical manual.

Check the condition condtion on the external I/O PCB and the controller PCB (If there is loose connector, open cable or mis-wiring)

OKOK

Check Point 2: Replace external I/O PCB

If Check Point 1 do not improve the symptom, change External I/O PCB.

OKOK

Check Point 3: Replace Controller PCB

If Check Point 2 do not improve the symptom, change Controller PCB.

02-06

Trouble shooting 6

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Indicate or Display:

INDOOR UNIT Error Method:

Combination error

Error code : 23

Detective Actuators: Detective details:

Indoor unit

1. The outdoor unit receives the serial signal of applied refrigerant information from Indoor unit. When the refrigerant is R410a.

2. When the outdoor unit type is multi.

Forecast of Cause:

1. The selection of indoor units is incorrect

Check Point 1 : Check the type of indoor unit

Check the type of the connected indoor unit.

>> If abnormal condition is found, correct it.

Check Point 2 : Replace Main PCB

Outdoor unit : No indication

If Check Point 1 do not improve the symptom, replace Main PCB of Outdoor unit.

02-07

Trouble shooting 7

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INDOOR UNIT Error Method:

Indoor unit address setting error

Indicate or Display:

Error code : 26

Outdoor unit : No indication

Detective Actuators:

Wired remote controller ( 2-Wire ) Indoor unit Controller PCB circuit

Forecast of Cause :

1. Wrong wiring of RCgroup 2. Wrong remote address setting 3. Indoor unit controller PCB failure

4. Remote controller failure

Detective details:

When the address number set by auto setting and manual setting are mixed in one RC group. When the duplicated address number exists in one RC group.

Check Point 1 : Wire installation

Wrong wire connection in RCgroup (Please refer to the installation manual)

Check Point 2 : Wrong RCgroup setting

The given address number by auto setting (00) and the manual set number (Except 00) were not existing in one RCG. The remote controller address setting by U.I. were not existing same address.

The duplicated address number is not existing in one RCgroup

Check Point 3 : Check Indoor unit controller PCB

Check if controller PCB damage

Change controller PCB and check the Error after setting remote controller address

02-08

Trouble shooting 8

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INDOOR UNIT Error Method:

Indicate or Display:

Connection unit number error (Indoor unit in Wired remote controller system)

Detective Actuators:

Wired remote controller ( 2-Wire ) Indoor unit Controller PCB circuit

Forecast of Cause :

1. Wrong wiring / Number of I.U, RC in RCgroup 2. Indoor unit controller PCB defective

Error code : 29

Detective details:

When the number of connecting indoor units are out of specified rule.

Check Point 1 : Wire installation

Wrong number of connecting indoor unit

Check Point 2 : Check Indoor unit controller PCB

Check if controller PCB damage Check if controller PCB and check the Error after setting remote controller address

Outdoor unit : No indication

02-09

Trouble shooting 9

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INDOOR UNIT Error Method:

Indoor unit PCB model information error

Indicate or Display:

Error code : 32

Outdoor unit : No indication

Detective Actuators:

Indoor unit Controller PCB

Detective details:

When power is on and there is some below case.

1. When model information of EEPROM is incorrect.

2. When the access to EEPROM failed.

Forecast of Cause:

1. External cause 2. Defective connection of electric components 3. Controller PCB failure

Check Point 1-1 : Reset Power Supply and operate

Does Error indication show again?

YESYES

Check Point 2 : Check Indoor unit electric components

Check all connectors. (loose connector or incorrect wiring)

Check any shortage or corrosion on PCB.

Check Point 1-2 : Check external cause such as noise

Check if the ground connection is proper. Check if there is any equipment that causes harmonic wave near the power cable (Neon light bulb or any electronic equipment which causes harmonic wave).

Check Point 3 : Replace Controller PCB

Change Controller PCB.

Note : EEPROM

EEPROM(Electronically Erasable and Programmable Read Only Memory) is a nonvolatile memory which keeps memorized information even if power is turned off. It can change the contents electronically. To change the contents, it uses higher voltage than normal, and it can not change a partial contents. (Rewriting shall be done upon erasing the all contents.) There is a limit in a number of rewriting.

02-10

Trouble shooting 10

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INDOOR UNIT Error Method:

Indoor unit motor electricity consumption detection error

Indicate or Display:

Error code : 33

Outdoor unit : No indication

Detective Actuators:

Indoor unit motor electricity consumption detection error

Detective details:

When the voltage value or the current value of the motor go beyond the limits.

Forecast of Cause:

1. Fan motor failure 2. Main PCB failure

Check Point 1 : Check rotation of Fan

Rotate the fan by hand when operation is off. (Check if fan is caught, dropped off or locked motor)

>>If Fan or Bearing is abnormal, replace It.

Check Point 2 : Check ambient temp. around motor

Check excessively high temperature around the motor. (if there is any surrounding equipment that causes heat)

>>Upon the temperature coming down, restart operation.

Check Point 3 : Check Indoor unit fan motor

Check Indoor unit fan motor. (PARTS INFORMATION 4)

>>if Indoor unit fan motor is abnormal, replace Indoor unit fan motor.

Check Point 4 : Replace Power Supply PCB

If Check Point 1- 3 do not improve the symptom, replace Main PCB.

02-11

Trouble shooting 11

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Indicate or Display:

INDOOR UNIT Error Method:

Indoor unit power supply error for fan motor

Error code : 39

Outdoor unit : No indication

Detective Actuators: Detective details:

Indoor Unit Power Supply PCB

When a momentary power cut off. When do not start fan motor.

Forecast of Cause :

1. External cause 2. Connection of connector failure 3. Power Supply PCB failure

Check Point 1 : Check external cause at lndoor and Outdoor (Voltage drop or Noise)

Instant drop : Check if there is a large load electric apparatus in the same circuit.

Momentary power failure : Check if there is a defective contact or leak current

in the power supply circuit.

Noise : Check if there is any equipment causing harmonic wave near electric line.

(Neon bulb or electric equipment that may cause harmonic wave) Check the complete insulation of grounding.

Check Point 2 : Check connection of Connector

Check if connector is removed.

Check erroneous connection. Check if cable is open.

>>Upon correcting the removed connector or mis-wiring, reset the power.

Check Point 3 : Replace Power supply PCB

If Check Point 1, 2 do not improve the symptom, replace Power supply PCB.

02-12

Trouble shooting 12

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INDOOR UNIT Error Method:

Indoor unit Communication circuit (wired remote controller) error

Indicate or Display:

Error code : 3A

Outdoor unit : No indication

Detective Actuators:

Indoor unit Controller PCB circuit

Forecast of Cause :

1.Communication PCB defective

2. Indoor unit controller PCB defective

Detective details:

Detect the communication error of microcomputer and communication PCB.

Check Point 1 : Check the connection of terminal

After turning off the power supply, check & correct the followings

Indoor unit - Check the connection the communication PCB and the controller PCB

Check Point 2 : Replace the communication PCB

If the Check point 1 is ok, replace the communication PCB

Check Point 3 : Replace the controller PCB

If condition is doesn’t change, replace the controller PCB

02-13

Trouble shooting 13

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INDOOR UNIT Error Method:

Indoor Room Thermistor Error

Indicate or Display:

Error code : 41

Outdoor unit : No indication

Detective Actuators:

Indoor Unit Controller PCB Circuit Indoor Temperature Thermistor

Forecast of Cause :

1. Connector failure connection 2. Thermistor failure 3. Controller PCB failure

Detective details:

Indoor unit thermistor is open or short is detected always.

Check Point 1 : Check connection of Connector

Check if connector is loose or removed Check erroneous connection Check if thermistor cable is open

>>Reset Power when reinstalling due to removed connector or incorrect wiring.

Check Point 2 : Remove connector and check Thermistor resistance value

Thermistor Characteristics(Rough value)

Temperature (°C ) Resistance value (k )

5 10 15 20 25 30 35

6.58.010.012.515.820.225.933.6

Temperature (°C )

40 45 50

3.594.355.3Resistance value (k )

If Thermistor is either open or shorted, replace it and reset the power.

Check Point 3 : Check Voltage of Controller PCB (DC 5.0V)

Make sure circuit diagram of each indoor unit and check terminal voltage at Thermistor (DC5.0V)

BLACK

CN32

CN8

If the voltage does not appear, replace Controller PCB and execute the check operation again.

BLACK

H/E Thermistor

Room Temp. Thermistor

02-14

Trouble shooting 14

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rouble shooting 14

INDOOR UNIT Error Method:

Indoor Heat Ex. Thermistor Error

Indicate or Display:

Error code : 42

Outdoor unit : No indication

Detective Actuators:

Indoor Unit Controller PCB

Detective details:

Indoor unit thermistor is open or short is detected always.

Heat Exchanger (MID) Thermistor

Forecast of Cause :

1. Connector failure connection 2. Thermistor failure 3. Controller PCB failure

Check Point 1 : Check connection of Connector

Check if connector is loose or removed Check erroneous connection Check if thermistor cable is open

>>Reset Power when reinstalling due to removed connector or incorrect wiring.

Check Point 2 : Remove connector and check Thermistor resistance value

Thermistor Characteristics(Rough value)

Temperature (°C ) Resistance value (k )

5 10 15 20 25 30 35

31.739.649.762.980.3103134176

Temperature (°C )

40 45 50

17.120.825.6Resistance value (k )

If Thermistor is either open or shorted, replace it and reset the power.

Check Point 3 : Check voltage of Controller PCB (DC5.0V)

Make sure circuit diagram of each indoor unit and check terminal voltage at Thermistor (DC5.0V)

BLACK

CN32

CN8

If the voltage does not appear, replace Controller PCB and execute the check operation again.

BLACK

H/E Thermistor

Room Temp. Thermistor

02-15

Trouble shooting 15

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INDOOR UNIT Error Method:

Indoor Unit Fan Motor Error

Indicate or Display:

Error code : 51

Outdoor unit : No indication

Detective Actuators:

Indoor unit Power Supply PCB Indoor unit fan motor

Detective details:

When the fan motor speed is less than 1/3 of the target fan speed for 56 seconds.

When detect the 0 rpm for 56 seconds after fan motor started.

Forecast of Cause:

1. Fan rotation failure 2. Fan motor winding open 3. Motor protection by surrounding temperature rise

4. Power Supply PCB failure 5. Indoor unit fan motor failure

Check Point 1 : Check rotation of Fan

Rotate the fan by hand when operation is off. (Check if fan is caught, dropped off or locked motor)

>>If Fan or Bearing is abnormal, replace It.

Check Point 2 : Check ambient temp. around motor

Check excessively high temperature around the motor. (if there is any surrounding equipment that causes heat)

>>Upon the temperature coming down, restart operation.

Check Point 3 : Check Indoor unit fan motor

Check Indoor unit fan motor. (PARTS INFORMATION 4)

>>if Indoor unit fan motor is abnormal, replace Indoor unit fan motor.

Check Point 4 : Replace Power Supply PCB

If Check Point 1- 3 do not improve the symptom, replace Power Supply PCB.

02-16

Trouble shooting 16

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INDOOR UNIT Error Method: Drain pump Error

Indicate or Display:

Error code : 53 Outdoor unit : No indication

Detective Actuators:

Indoor Unit Controller PCB Circuit Float Switch

Forecast of Cause :

1. Float switch failure 2. Shorted connector/wire 3. Controller PCB failure

Detective details:

When Float switch is ON for more than 3 minutes.

4. Drain pump failure 5. Hose clogging

Check Point 1 : Check Float Switch

Check operation of float switch. (any blocking by dust, etc.) Remove Float switch and check ON/OFF switching operation

by using a meter.

>>If Float switch is abnormal, replace it.

Check Point 2 : Check Connector and Wire

Check loose contact of CN9 and shorted wire (pinched wire).

>>Replace Float switch if the wire is abnormal

ON OFF

Check Point 3 : Check Drain Hose

Check Drain Hose .

>>If there is Hose clogging. Please clear the clog.

Check Point 4 : Check Controller PCB and Drain Pump

Check Drain Pump.

If drain pump is not run on the working condition, check the voltage of the CN71 on the controller PCB.

DC12V

CN71-1 CN71-2

CN71

CN71-3

CN71-4

Measurement result 12V : Replace the Drain Pump Other than 12V : Replace the controller PCB

RED

WHITE

DC DRAIN PUMP MOTOR

02-17

Trouble shooting 17

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OUTDOOR UNIT Error Method:

Indicate or Display:

Outdoor unit main PCB model information error

Error code : 62

Detective Actuators: Detective details:

Outdoor unit Main PCB

Access to EEPROM failed due to some cause after outdoor unit started.

Forecast of Cause:

1. External cause (Noise, temporary open, voltage drop) 2. Main PCB failure

Check Point 1-1 : Reset Power Supply and operate

Does Error indication show again?

YESYES

Check Point 2 : Replace Main PCB

Change Main PCB.

Check Point 1-2 : Check external cause

Check if temporary voltage drop was not generated. Check if momentary open was not generated. Check if ground is connection correctly or there are no related cables near the power line.

Outdoor unit : No indication

02-18

Trouble shooting 18

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OUTDOOR UNIT Error Method:

Inverter error

Indicate or Display:

Error code : 63

Outdoor unit : No indication

Detective Actuators:

Outdoor unit Main PCB

Forecast of Cause :

1. External cause. 2. Power supply to Main PCB wiring disconnection, open

3. Outdoor unit Main PCB failure

Check Point 1-1 : Turn the power on again?

Error displayed again?

YESYES

Check Point 2 : Check the wiring

Connector and wiring connection state check Cable open check

Detective details:

Error information received from Outdoor unit Main PCB

Check Point 1-2: External cause

Check if temporary voltage drop was not generated. Check if temporary open was not generated.

Check if ground is connected correctly or there are no related cables near the power line.

Check Point 3 : Replace Main PCB

Replace Outdoor unit Main PCB.

02-19

Trouble shooting 19

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OUTDOOR UNIT Error Method:

INDOOR UNIT

PFC circuit error

Indicate or Display:

Error code : 64

Outdoor unit : No indication

Detective Actuators:

Outdoor unit Main PCB

Detective details:

When inverter output DC voltage is higher than 420V for over 3 seconds, the compressor stops. If the same operation is repeated 5 times, the compressor stops permanently.

Forecast of Cause :

1. External cause 2. Connector connection failure 3. Main PCB failure

Check Point 1 : Check external cause at Indoor and Outdoor (Voltage drop or Noise)

Instant drop : Check if there is a large load electric apparatus in the same circuit.

Momentary power failure : Check if there is a defective contact or leak current in the power supply circuit.

Noise : Check if there is any equipment causing harmonic wave near electric line. (Neon bulb or electric equipment that may cause harmonic wave) Check the complete insulation of grounding.

OKOK

Check Point 2 : Check connection of Connector

Check if connector is removed. Check erroneous connection. Check if cable is open.

>>Upon correcting the removed connector or mis-wiring, reset the power.

OKOK

Check Point 3 : Replace Main PCB

If Check Point 1, 2 do not improve the symptom, change Main PCB.

2-20

Trouble shooting 20

AMP Air Conditioning

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OUTDOOR UNIT Error Method:

Trip terminal L error

Indicate or Display:

Error code : 65

Outdoor unit : No indication

Detective Actuators:

Outdoor unit Main PCB

Forecast of Cause:

1. Outdoor unit Main PCB failure

Check Point 1 : Replace Main PCB

Replace Outdoor unit Main PCB.

Detective details:

When the signal from FO terminal of IPM is "L"(=0V) while the compressor stops.

2-21

Trouble shooting 21

AMP Air Conditioning

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OUTDOOR UNIT Error Method:

Discharge Thermistor Error

Indicate or Display:

Error code : 71

Outdoor unit : No indication

Detective Actuators:

Discharge temperature thermistor

Forecast of Cause :

1. Connector connection failure, open

2. Thermistor failure

3. Main PCB failure

Detective details:

Discharge temperature thermistor short detected Discharge thermistor open detected

Check Point 1 : Check the connector connection and cable open

Connector connection state check Cable open check

Check Point 2 : Check the thermistor

Thermistor characteristics check (Disconnect the thermistor from the PCB and check.) * For the thermistor characteristics, refer to the "Service Parts Information 8".

Check Point 3 : Check voltage of Main PCB (DC5.0V)

Main PCB CN71:3-4 voltage value =5V Remove the thermistor from Main PCB, check the voltage.

THERMISTOR

(PIPE )

THERMISTOR

(DIS.PIPE.)

BLACK

BLACK 4 3 2 1 4 3 2 1

CN71

If the voltage does not appear, replace Main PCB,

and execute the check operation again.

02-22

Trouble shooting 22

AMP Air Conditioning

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OUTDOOR UNIT Error Method: Compressor Thermistor Error

Indicate or Display:

Error code : 72

Outdoor unit : No indication

Detective Actuators:

Compressor temperature thermistor

Forecast of Cause :

1. Connector connection failure, open

2. Thermistor failure

3. Main PCB failure

Detective details:

Compressor temperature thermistor short detected Compressor thermistor open detected

Check Point 1 : Check the connector connection and cable open

Connector connection state check Cable open check

Check Point 2 : Check the thermistor

Thermistor characteristics check (Disconnect the thermistor from the PCB and check.) * For the thermistor characteristics, refer to the "Service Parts Information 8".

Check Point 3 : Check voltage of Main PCB (DC5.0V)

Main PCB CN73:1-3 voltage value =5V Remove the thermistor from Main PCB, check the voltage.

THERMISTOR

(COMP.TEMP.)

BLACK

BLACK 1 2 3 1 2 3

CN73

If the voltage does not appear, replace Main PCB, and execute

the check operation again.

02-23

Trouble shooting 23

AMP Air Conditioning

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OUTDOOR UNIT Error Method:

Heat Ex. Outlet Temp. Thermistor Error

Indicate or Display:

Error code : 73

Outdoor unit : No indication

Detective Actuators:

Heat exchanger liquid temperature thermistor

Forecast of Cause :

1. Connector connection defective, open

2. Thermistor failure

3. Main PCB failure

tive details:

Detec

Heat exchanger outlet temperature thermistor short or open detected

Check Point 1 : Check the connector connection and cable open

Connector connection state check Cable open check

Check Point 2 : Check the thermistor

Thermistor characteristics check (Disconnect the thermistor from the PCB and check.) * For the thermistor characteristics, refer to the "Service Parts Information 8".

Check Point 3 : Check voltage of Main PCB (DC5.0V)

Main PCB CN71:1-2 voltage value =5V Remove the thermistor from Main PCB, check the voltage.

THERMISTOR

BLACK 4 3 2 1 4 3 2 1

CN71

(PIPE.)

(DIS.PIPE.)

BLACK

If the voltage does not appear, replace Main PCB, and execute

the check operation again.

02-24

Trouble shooting 24

AMP Air Conditioning

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OUTDOOR UNIT Error Method:

Outdoor Thermistor Error

Indicate or Display:

Error code : 74

Outdoor unit : No indication

Detective Actuators:

Outdoor temperature thermistor

Forecast of Cause :

1. Connector connection defective, open

2. Thermistor failure

3. Main PCB failure

Detective details:

Outdoor temperature thermistor short or open detected

Check Point 1 : Check the connector connection and cable open

Connector connection state check Cable open check

Check Point 2: Check the thermistor

Thermistor characteristics check (Disconnect the thermistor from the PCB and check.) * For the thermistor characteristics, refer to the "Service Parts Information 8".

Check Point 3 : Check voltage of Main PCB (DC5.0V)

Main PCB CN70:1-3 voltage value =5V Remove the thermistor from Main PCB, check the voltage.

THERMISTOR

(OUT TEMP.)

BLACK

BLACK 3 2 1 3 2 1

CN70

If the voltage does not appear, replace Main PCB, and execute

the check operation again.

02-25

Trouble shooting 25

AMP Air Conditioning

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OUTDOOR UNIT Error Method: Heat Sink Thermistor Error

Indicate or Display:

Error code : 77

Outdoor unit : No indication

Detective Actuators:

Outdoor unit Main PCB

Forecast of Cause :

Detective details:

Heat sink temperature thermistor (Built-in IPM) open/short detected

1. Main PCB failure

If this error is displayed, replace Main PCB

Attention!!

This unit does not have a heat sink themistor In this case, replace Main PCB

02-26

Trouble shooting 26

AMP Air Conditioning

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OUTDOOR UNIT Error Method:

Current sensor error

Indicate or Display:

Error code : 84

Outdoor unit : No indication

Detective Actuators:

Outdoor unit Main PCB

Detective details:

When Input Current Sensor has detected 0A, while Inverter Compressor is operating at higher than 56rps, after 1minute upon starting the Compressor. (Except during the defrost operation)

Forecast of Cause :

1. Defective connection of electric components 2. External cause 3. Main PCB failure

Check Point 1-1 : Reset Power Supply and operate

Does Error indication show again?

YES

Check Point 2 : Check connections of Outdoor Unit Electrical Components

Check if the terminal connection is loose. Check if connector is removed.

Check erroneous connection. Check if cable is open.

>>Upon correcting the removed connector or mis-wiring, reset the power.

Check Point 1-2 : Check external cause at Indoor and Outdoor (Voltage drop or Noise)

Instant drop : Check if there is a large load electric apparatus in the same circuit.

Momentary power failure : Check if there is a defective contact or leak current in the power supply circuit.

Noise : Check if there is any equipment causing harmonic wave near electric line.(Neon bulb or electric equipment that may cause harmonic wave) Check the complete insulation of grounding.

Check Point 4 : Replace Main PCB

If Check Point 1, 2 do not improve the symptom, change Main PCB.

02-27

Trouble shooting 27

AMP Air Conditioning

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OUTDOOR UNIT Error Method: Pressure Sensor Error

Indicate or Display:

Error code : 86

Outdoor unit : No indication

Detective Actuators:

High pressure switch

Forecast of Cause :

1. High pressure switch connector disconnection, open

2. High pressure switch characteristics failure3. Main PCB failure

Detective details:

When the power was turned on, "high pressure switch : open" was detected.

Check Point 1 : Check the high pressure switch connection state

Connector and wiring connection state check Cable open check

Check Point 2 : Check the high pressure switch characteristics

Switch characteristics check * For the characteristics of high pressure switch, refer to below.

Check Point 3 : Replace Main PCB

Change Main PCB, and execute the check operation again.

Type of contact

Pressure

Characteristics of pressure switch

Contact : Short Open Contact : Open Short

(CN 74)

Pressure switch 1

4.2 0.1MPa

3.2 0.15MPa

02-28

Trouble shooting 28

AMP Air Conditioning

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OUTDOOR UNIT Error Method: Trip detection

Indicate or Display:

Error code : 94

Outdoor unit : No indication

Detective Actuators:

Outdoor unit Main PCB Compressor

Forecast of Cause :

1. Outdoor unit fan operation defective, foreign matter on hear exchanger,

Detective details:

"Protection stop by overcurrent generation after inverter compressor start processing completed'' generated consecutively 10 times.

* The number of generations is reset if the start-up of

the compressor succeeds.

excessive rise of ambient temperature

2. Main PCB

3. Inverter compressor failure (lock, winding short)

Check Point 1 : Check the outdoor unit fan operation, heat exchanger, ambient temperature

No obstructions in air passages? Heat exchange fins clogged Outdoor unit fan motor check Ambient temperature not raised by the effect of other heat sources? Discharged air not sucked in?

OKOK

Check Point 2: Replace Main PCB

If Check Point 1 do not improve the symptom, change Main PCB.

OKOK

Check Point 3: Replace Compressor

If Check Point 2 do not improve the symptom, change Compressor.

02-29

Trouble shooting 29

AMP Air Conditioning

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OUTDOOR UNIT Error Method: Compressor rotor position

detection error

Indicate or Display:

Error code : 95

Outdoor unit : No indication

Detective Actuators:

Outdoor unit Main PCB Compressor

Detective details:

While running the compressor, if the detected rotor location is out of phase with actual rotor location more than 105°, the compressor stops. After the compressor restarts, if the same operation is repeated within 40sec, the compressor stops again. If and repeats 5 times, the compressor stops permanently.

Forecast of Cause :

1. Defective connection of electric components 2. Main PCB failure 3. Compressor failure

Check Point 1 : Check Noise from Compressor

Turn on Power and check operation noise.

If an abnormal noise show, replace Compressor.

OKOK

Check Point 2 : Check connection of around the Compressor components

For Compressor Terminal, Main PCB

Check if connector is removed. Check erroneous connection. Check if cable is open.

(Refer to PARTS INFORMATION 2)

>>Upon correcting the removed connector or mis-wiring, reset the power.

OKOK

Check Point 3: Replace Main PCB

If Check Point 1,2 do not improve the symptom, change Main PCB.

OKOK

Check Point 4: Replace Compressor

If Check Point 3 do not improve the symptom, change Compressor.

02-30

Trouble shooting 30

AMP Air Conditioning

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OUTDOOR UNIT Error Method:

Outdoor Unit Fan Motor Error

Indicate or Display:

Error code : 97

Outdoor unit : No indication

Detective Actuators:

Outdoor unit Main PCB Outdoor unit fan motor

Detective details:

When outdoor fan rotation speed is less than 100rpm in 20 seconds after fan motor starts, fan motor stops. After fan motor restarts, if the same operation within 60sec is repeated 3 times in a row, compressor and fan motor stops. If and repeats 5 times in a row, compressor and fan motor stops permanently.

Forecast of Cause:

1. Fan rotation failure 2. Motor protection by surrounding temperature rise 3. Main PCB failure

4. Outdoor unit fan motor failure

Check Point 1 : Check rotation of Fan

Rotate the fan by hand when operation is off. (Check if fan is caught, dropped off or locked motor)

>>If Fan or Bearing is abnormal, replace it.

Check Point 2 : Check ambient temp. around motor

Check excessively high temperature around the motor. (If there is any surrounding equipment that causes heat)

>>Upon the temperature coming down, restart operation.

Check Point 3 : Check Outdoor unit fan motor

Check Outdoor unit fan motor. (PARTS INFORMATION 5)

>>If Outdoor Fan Motor is abnormal, replace Outdoor fan motor and Main PCB.

Check Point 4 : Check Output Voltage of Main PCB

Check outdoor unit circuit diagram and the voltage. (Measure at Main PCB side connector)

RED

3 4 5 6 7 7

BLACK WHITE YELLOW BROWN

CN800

If the voltage is not correct, replace Main PCB.

Fan motor

Read wire DC voltage Red - Black

White - Black

280V (AC220V-10%) ~ 373V (AC240+10%)

15 1.5V

02-31

Trouble shooting 31

AMP Air Conditioning

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OUTDOOR UNIT Error Method: 4-Way Valve Error

Indicate or Display:

Error code : 99

Outdoor unit : No indication

Detective Actuators:

Indoor Unit Controller PCB Circuit Heat Exchanger Temperature Thermistor Room Temperature Thermistor 4-way valve

Detective details:

When the indoor heat exchanger temperature is compared with the room temperature, and either following condition is detected continuously two times, the compressor stops. Cooling or Dry operation [Indoor heat exchanger temp.] - [Room temp.] > 20°C Heating operation [indoor h If the same operation is repeated 5 times, the compressor stops permanently.

eat exchanger temp.] - [Room temp.] < -14°C

Forecast of Cause :

1. Connector connection failure 2. Thermistor failure 3. Coil failure 4. 4-way valve failure

5. Main PCB failure

Check Point 1 : Check connection of Connector

Check if connector is removed. Check erroneous connection. Check if thermistor cable is open.

>> Upon correcting the removed connector or mis-wiring, reset the power.

OKOK

Check Point 2 : Check thermistor of Indoor unit

Isn’t it fallen off the holder? Is there a cable pinched?

>> Check characteristics of thermistor, (Refer to Trouble shooting 13,14), If defective, replace the thermistor.

OKOK

Check Point 3 : Check the solenoid coil and 4-way valve

[ Solenoid coil ] Remove CN30 from PCB and check the resistance value of coil. Resistance value is about 1.7k

>> If it is Open or abnormal resistance value, replace Solenoid Coil.

[ 4-way valve ] Check each piping temperature, and the location of the valve by the temperature difference. >> If the value location is not proper, replace 4-way valve.

OKOK

Check Point 4 : Replace Main PCB

If Check Point 1- 3 do not improve the symptom, replace Main PCB.

02-32

Trouble shooting 32

AMP Air Conditioning

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OUTDOOR UNIT Error Method:

Discharge Temp. Error

Indicate or Display:

Error code : A1

Outdoor unit : No indication

Detective Actuators:

Detective details:

Discharge temperature thermistor

Forecast of Cause :

1. 3-way valve not opened

2. EEV defective, strainer clogged

3. Outdoor unit operation

4. Discharge temperature thermistor

5. Insufficient refrigerant

Check Point 1 : Check if 3-way valve(gas side) is open.

If the 3-way valve(gas side) was closed, open the 3-way valve(gas side) and check operation.

Check Point 2 : Check the EEV, strainer

EEV open? Strainer clogging check (before and after EEV, ACM oil return) Refer to "Service Parts Information 3 "

"Protection stop by "discharge temperature 115 operation'''' generated 2 times within 24 hours.

failure, foreign matter on heat exchanger

failure

Check Point 1 : Check if 3-way valve(liquid side) is open.

If the 3-way valve(liquid side) was closed, open the 3-way valve(liquid side) and check operation.

Check Point 2 : Check the EEV, strainer

EEV open? Strainer clogging check (before and after EEV, ACM oil return) Refer to "Service Parts Information 3 "

°C during compressor

Check Point 3 : Check the outdoor unit fan,heat exchanger

Check for foreign object at heat exchanger Check if fan can be rotated by hand. Motor check(PARTS INFORMATION 5)

Check Point 4 : Check the discharge thermistor

Discharger thermistor characteristics check (Check by disconnecting thermistor from PCB. Refer to the Troubleshooting 21)

Check Point 5 : Check the refrigerant amount

Leak check

02-33

Trouble shooting 33

AMP Air Conditioning

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OUTDOOR UNIT Error Method: Compressor Temp. Error

Indicate or Display:

Error code : A3

Outdoor unit : No indication

Detective Actuators:

Detective details:

Compressor temperature thermistor

Forecast of Cause :

1. 3-way valve not opened

2. EEV defective, strainer clogged

3. Outdoor unit operation

4. Compressor temperature thermistor

5. Insufficient refrigerant

Check Point 1 : Check if 3-way valve(gas side) is open.

If the 3-way valve(gas side) was closed, open the 3-way valve(gas side) and check operation.

Check Point 2 : Check the EEV, strainer

"Protection stop by "compressor temperature" 110°C during compressor operation""generated 2 times within 24 hours

failure, foreign matter on heat exchanger

failure

Check Point 1 : Check if 3-way valve(liquid side) is open.

If the 3-way valve(liquid side) was closed, open the 3-way valve(liquid side) and check operation.

Check Point 2 : Check the EEV, strainer

EEV open? Strainer clogging check (before and after EEV, ACM oil return) Refer to "Service Parts Information 3 ".

Check Point 3 : Outdoor unit fan, heat exchanger check

Check for foreign object at heat exchanger Check if fan can be rotated by hand. Motor check(PARTS INFORMATION 5)

Check Point 4 : Check the compressor temperature thermistor

Compressor temperature thermistor characteristics check (Check by disconnecting thermistor from PCB Refer to the Troubleshooting 22)

Check Point 5 : Check the refrigerant amount

Leak check

EEV open? Strainer clogging check (before and after EEV, ACM oil return) Refer to "Service Parts Information 3 "

02-34

2-3 TROUBLE SHOOTING WITH NO ERROR CODE

AMP Air Conditioning

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Trouble shooting 34

Forecast of Cause:

1. Power Supply failure 2. External cause

Indoor Unit - No Power

3. Electrical Components defective

Check Point 1 : Check Installation Condition

Isn’t the breaker down? Check loose or removed connection cable.

>>If abnormal condition is found, correct it by referring to Installation Manual or Data & Technical Manual.

OKOK

Check Point 2 : Check external cause at Indoor and Outdoor (Voltage drop or Noise)

Instant drop ----- Check if there is a large load electric apparatus in the same circuit. Momentary power failure ----- Check if there is a defective contact or leak current in

the power supply circuit. Noise ----- Check if there is any equipment causing harmonic wave near electric line.

(Neon bulb or electric equipment that may cause Check the complete insulation of grounding.

harmonic wave)

Check Point 3 : Check Electrical Components

Check the voltage of power supply.

>> Check if AC198 - 264V appears at Outdoor Unit Terminal L - N.

YESYES

Check Fuse in Filter PCB.

>> If Fuse is open, check if the wiring between Terminal and Filter PCB is loose, and replace Fuse.

Check Varistor in Filter PCB.

>> If Varistor is defective, there is a possibility of an abnormal power supply. Check the correct power supply and replace Varistor. Upon checking the normal power supply, replace Varistor.

If the symptom does not change by above Check 3, replace Main PCB.

02-35

Trouble shooting 35

AMP Air Conditioning

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Outdoor unit - No Power

Forecast of Cause:

1. Power Supply failure 2. External cause

3. Electrical Components defective

Check Point 1 : Check Installation Condition

Isn’t the breaker down? Check loose or removed connection cable.

>>If abnormal condition is found, correct it by referring

to Installation Manual or Data & Technical Manual.

OKOK

Check Point 2 : Check external cause at Indoor and Outdoor (Voltage drop or Noise)

Instant drop ----- Check if there is a large load electric apparatus in the same circuit. Momentary power failure ----- Check if there is a defective contact or leak current in the power supply circuit. Noise ----- Check if there is any equipment causing harmonic wave near electric line.

(Neon bulb or electric equipment that may cause harmonic wave) Check the complete insulation of grounding.

OKOK

Check Point 3 : Check Electrical Components

Check the voltage of power supply.

>> Check if AC198 - 264V appears at Outdoor unit Terminal L - N.

YESYES

Check Fuse in Main PCB.

>> If Fuse is open, check if the wiring between Terminal and Main PCB is loose,

and replace Fuse.

If the symptom does not change by above Check 3, replace Main PCB.

02-36

Trouble shooting 36

AMP Air Conditioning

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Forecast of Cause:

1. Setting/ Connection failure 2. External cause

No Operation (Power is ON)

3. Electrical Component defective

Check Point 1 : Check indoor and outdoor installation condition

Indoor Unit - Check incorrect wiring between Indoor Unit - Remote Control. Or, check if there is an open cable connection. Are these Indoor Unit, Outdoor Unit, and Remote Control suitable model numbers to connect?

>> If there is some abnormal condition, correct it by referring to Installation manual and Data & Technical Manual.

Turn off Power and check/ correct followings.

Is there loose or removed communication line of Indoor Unit and Outdoor Unit?

Check Point 2 : Check external cause at Indoor and Outdoor (Voltage drop or Noise)

(Neon bulb or electric equipment that may cause harmonic wave) Check the complete insulation of grounding.

OKOK

Check Point 3 : Check Wired Remote Controller and Controller PCB

Check Voltage at CN14 of Controller PCB. (terminal 1-3) (Power supply to Remote Control)

>> If the symptom does not change by above Check 1, 2, 3, replace Main PCB of Outdoor unit.

02-37

Trouble shooting 37

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No Cooling / No Heating

Forecast of Cause:

1. Indoor Unit error 2. Outdoor Unit error

3. Effect by Surrounding environment

4. Connection Pipe / Connection Wire failure 5. Refrigeration cycle failure

Check Point 1 : Check Indoor Unit

Does Indoor Unit FAN run on HIGH FAN?

Is Air Filter dirty? Is Heat Exchanger clogged? Check if Energy save function is operated.

OKOK

Check Point 2 : Check Outdoor Unit Operation

Check if Outdoor Unit is operating Check any objects that obstruct the air flow route. Check clogged Heat Exchanger. Is the Valve open?

OKOK

Check Point 3 : Check Site Condition

Is capacity of Indoor Unit fitted to Room size? Any windows open? Or direct sunlight ?

OKOK

Check Point 4 : Check Indoor/ Outdoor Installation Condition

Check connection pipe (specified pipe length & Pipe diameter?)

Check any loose or removed communication line.

>> If there is an abnormal condition, correct it by referring to Installation Manual or Data & Technical Manual.

OKOK

MPa MPa

Check Point 5 : Check Refrigeration Cycle

Check if Strainer is clogged (Refer to the figure at right).

Measure Gas Pressure and if there is a leakage, correct it.

>> When recharging the refrigerant, make sure to perform vacuuming, and recharge the specified amount.

Check EEV (PARTS INFORMATION 3)

Check Compressor (PARTS INFORMATION 1,2)

Attention

Strainer normally does not have temperature difference between inlet and outlet as shown in , but if there is a difference like shown in , there is a possibility of inside clogged. In this case, replace Strainer.

Pipe (In) Pipe (Out)

02-38

Trouble shooting 38

AMP Air Conditioning

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Forecast of Cause :

1. Abnormal installation (Indoor/ Outdoor)

Abnormal Noise

2. Fan failure (Indoor/ Outdoor)

3. Compressor failure (Outdoor)

Diagnosis method when Abnormal Noise is occurred

Abnormal noise is coming from Indoor Unit. (Check and correct followings)

Abnormal noise is coming from Outdoor Unit. (Check and correct followings)

Is Main Unit installed in stable condition? Is the installation of Air suction grille and front panel normal?

Is Fan broken or deformed? Is the screw of Fan loose? Is there any object which obstruct the Fan rotation?

Trouble shooting 39

Forecast of Cause:

Water Leaking

Is Main Unit installed in stable condition? Is Fan Guard installed normally?

Is Fan broken or deformed? Is the screw of Fan loose?

Is there any object which obstruct the Fan rotation?

Check if of piping is happening.

vibration noise by loose bolt or contact noise

Is Compressor locked?

>> Check Compressor (PARTS INFORMATION 1,2)

1. Erroneous installation 2. Drain hose failure

Diagnosis method when water leak occurs

Is Main Unit installed in stable condition? Is Main Unit broken or deformed at the time of transportation or maintenance?

OKOK

Is Drain Hose connection loose? Is there a trap in Drain Hose?

Is Drain Hose clogged?

OKOK

Is Fan rotating?

Diagnosis method when water is spitting out.

Is the filter clogged?

OKOK

Check Gas Pressure and correct it if there was a gas leak.

MPa MPa

02-39

2-4 SERVICE PARTS INFORMATION

AMP Air Conditioning

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SERVICE PARTS INFORMATION 1

Compressor

Diagnosis method of Compressor ( If Outdoor Unit LED displays Error, refer to Trouble shooting )

Does not start up

Is there open or loose connection cable?

Check Main PCB, connection of Compressor, and winding resistance. (Refer to the next page).

>> If there is no failure, the defect of Compressor is considered (Locked compressor due to clogged dirt or less oil)

Replace Compressor

Stops soon after starting up

Is there open or loose connection cable?

Is Gas Pipe Valve open? (Low Pressure is too low)

MPa MPa

Check if Refrigerant is leaking. (Recharge Refrigerant)

Abnormal noise

Check if vibration noise by loose bolt or contact noise of piping is happening.

Defective Compressor can be considered. (due to inside dirt clogging or bro

ken component)

Replace Compressor

Check if Strainer is clogged. (PARTS INFORMATION 3)

Check Main PCB, connection of Compressor,and winding resistance. (Refer to the next page).

>> If there is no failure, the defect of Compressor can be considered. (Compression part broken or valve defective.)

Replace Compressor

02-40

SERVICE PARTS INFORMATION 2

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Inverter Compressor

Check Point 1 : Check Connection

Check terminal connection of Compressor (loose or incorrect wiring)

Terminal cover opened

T(W)

(BLACK)

R(U)

(RED)

S(V)

(WHITE)

Check Point 2 : Check Winding Resistance

Check winding resistance of each terminal

If the resistance value is 0 or infinite, replace Compressor.

RED

Main PCB

W 7

(U)

W 8 W 9

(W) (V)

BLACK

WHITE

Compressor

Resistance Value :

at 20°C

0.818

Check Point 3 : Replace Main PCB

If the symptom does not change with above Check 1, 2, replace Main PCB.

02-41

SERVICE PARTS INFORMATION 3

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Outdoor unit Electronic Expansion Valve ( EEV )

Check Point 1 : Check Connections

Check connection of connector ( Loose connector or open cable )

EXPANSION VALVE COIL

CN40

1 2 3 4 5

RED BLUE

ORANGE YELLOW WHITE

Check Point 2 : Check Coil of EEV

Remove connector, check each winding resistance of Coil.

Read wire

Resistance value

Check Point 3 : Check Noise at start up

Turn on Power and check operation noise.

If an abnormal noise does not show, replace Main PCB.

White - Red Yellow - Red Orange - Red

20°C

Check Point 4 : Check Voltage from Main PCB.

Remove Connector and check Voltage (DC12V)

If it does not appear, replace Main PCB.

Blue - Red

If Resistance value is abnormal, replace EEV.

Check Point 5 : Check Opening and Closing Operation of Valve

When Valve is closed, it has a temp. difference between Inlet and Outlet.

CLOSE Example : Hot Gas

If it is open, it has no temp. difference between Inlet and Outlet.

OPEN Example : Hot Gas

Pipe (In)

Check Point 6 : Check Strainer

Strainer normally does not have temperature difference between inlet and outlet as shown in , but if there is a difference as shown in , there is a possibility of inside clogged. In this case, replace Strainer.

Pipe (In) Pipe (Out)

Pipe (Out)

Pipe (In)

Pipe (Out)

Pipe (In) Pipe (Out)

02-42

SERVICE PARTS INFORMATION 4

AMP Air Conditioning

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Indoor unit fan motor

Check Point 1 : Check rotation of Fan

Rotate the fan by hand when operation is off. (Check if fan is caught, dropped off or locked motor)

>>If Fan or Bearing is abnormal, replace it.

Check Point 2 : Check resistance of Indoor unit Fan Motor

Refer to below. Circuit-test "Vm" and "GND" terminal. (Vm: DC voltage, GND: Earth terminal)

>>If they are short-circuited (below 300 k ), replace Outdoor fan motor and Main PCB.

Pin number (wire color)

1 (Red) 2

3 No function 4 (Black) 5 (White) 6 (Yellow) 7 (Brown) Feed back (FG)

Terminal function (symbol)

DC voltage(Vm)

No function

(GND) Control voltage (Vcc) Speed command (Vsp)

SERVICE PARTS INFORMATION 5

Outdoor unit fan motor

Check Point 1 : Check rotation of Fan

Rotate the fan by hand when operation is off. (Check if fan is caught, dropped off or locked motor)

>>If Fan or Bearing is abnormal, replace it.

Check Point 2 : Check resistance of Outdoor Fan Motor

Refer to below. Circuit-test "Vm" and "GND" terminal. (Vm: DC voltage, GND: Earth terminal)

>>If they are short-circuited (below 300 k ), replace Outdoor fan motor and Main PCB.

Pin number (wire color)

1 (Red) 2 3 No function 4 (Black) 5 (White) 6 (Yellow) 7 (Brown) Feed back (FG)

Terminal function (symbol)

DC voltage (Vm) No function

Earth terminal (GND) Control voltage (Vcc) Speed command (Vsp)

02-43

SERVICE PARTS INFORMATION 8

AMP Air Conditioning

www.ampair.co.uk | sales@ampair.co.uk

Thermistor

Check Point : Check Thermistor resistance value

Remove connector and check Thermistor resistance value.

Temperature

[°C]

- 20

- 10

- 5 0 5 10 15 20 25 30 40 50 60 70 80 90 100 110 120

Applicable Thermistors

Thermistor A Thermistor B Thermistor C Thermistor D

---

168.6

129.8

100.9

79.1

62.6

49.8

40.0

26.3

17.8

12.3

8.7

6.3

4.6

3.4

2.6

2.0

Discharge temp. TH Compressor temp. TH

Resistance Value [ k ]

---

27.8

21.0

16.1

12.4

9.6

7.6

6.0

4.8

3.8

2.5

1.7

1.2

---

--Outdoor temp. TH Heat sink temp. THHeat exchanger. TH

105.4

58.2

44.0

33.6

25.9

20.2

15.8

12.5

10.0

8.0 5

3.6

---

27.4

20.7

15.8

12.2

9.5

7.5

5.9

4.7

3.8

2.5

1.7

1.2

0.8

0.6

0.4

0.3

---

02-44

3-3-17,Suenaga,Takatsu-ku,Kawasaki 213-8502,Japan

AMP Air Conditioning

www.ampair.co.uk | sales@ampair.co.uk

Dec. 2015 Printed in Japan

Fujitsu ARG18LHTBP, RDG18LHTBP, AOG24LBCA, ROG18LBCA, ARG24LHTBP Service Instruction

Specifications and Main Features

Frequently Asked Questions

User Manual