Sharp AY-X36RU, AE-X36RU Service Manual

AY-X36RU AE-X36RU

PRODUCT SPECIFICATION

----------------------------- 2

[1] SPECIFICATION

---------------------------------------- 2

[2] EXTERNAL DIMENSION

----------------------------- 3

ELECTRIC CIRCUIT

----------------------------------------- 4

[1] WIRING DIAGRAM

------------------------------------- 4

[2] CONTROL UNIT PWB WRING

---------------------- 5

FUNCTION AND CONTROL

----------------------------- 6

[1] Remote Control Introduction

------------------------- 6

TROUBLESHOOTING

------------------------------------ 10

[1] Error Code List

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SERVICE MANUAL

In the interests of user-safety (Required by safety regulations in some countries) the set should be restored to its

original condition and only parts identical to those specied should be used

This document has been published to be used for after sales service only. The contents are subject to change without notice.

CONTENTS

[2] Troubleshooting for Main Malfunction ----------- 14 [3] Troubleshooting for Normal Malfunction

--------- 29

REFRIGERATION CYCLE

------------------------------ 31

[1] Refrigerant System Diagram

---------------------- 31

[2] PERFORMANCE CURVES

------------------------ 31

DISASSEMBLY PROCEDURE

------------------------ 33

[1] INDOOR UNIT

----------------------------------------- 33

[2] OUTDOOR UNIT

-------------------------------------- 36

S0402AYX6RCU/c

SPLIT TYPE AIR CONDITIONERS

INDOOR UNIT OUTDOOR UNIT

MODELS

AY-X36RU AE-X36RU

PRODUCT SPECIFICATION

[1] SPECIFICATION

MODEL

ITEMS

INDOOR UNIT OUTDOOR UNIT

AY-X36RU AE-X36RU Rated cooling capacity (Min. - Max.) Btu/h 33600 ( 7400 － 36000 ) Rated heating capacity (Min. - Max.) Btu/h 34600 ( 15000 － 36000 ) Moisture removal (at cooling) pints/h 7.4 Electrical data Phase Single Rated frequency Hz 60 Rated voltage V 208/230 Rated current Cool A 17 (Min.-Max.) Heat A 16.5 Rated input Cool W 4100 ( 450 － 4300 ) (Min.-Max.) Heat W 3800 ( 560 － 4300 )

Compressor

Type Rotary Model TNB306FPGMC

Refrigerant system

Evaporator Aluminum Fin-copper tube type Condenser Aluminum Fin-copper tube type Control Expansion valve

Refrigerant

type R410A oz. ( g ) 91.7 ( 2600 )

Noise level (at cooling)

Turbo dB(A) 54

High 50 Low 44 Soft 38

Noise level (at heating)

Turbo dB(A) 54

High 50 Low 44 Soft 38

Fan system

Drive Direct drive

Air ow quantity

(at cooling)

Turbo CFM(m3/min) 736 ( 20.8 ) 2589(73.3) High 647 ( 18.3 ) Low 530 ( 15 ) Soft 412 ( 11.7 )

Air ow quantity

(at heating)

Turbo CFM(m3/min) 736 ( 20.8 ) 2589(73.3) High 647 ( 18.3 ) Low 530 ( 15 ) Soft 412 ( 11.7 )

Fan Cross ow fan Propeller fan

Connections

Refrigerant coupling Flare type Refrigerant tube size (Gas line ) inch (mm) 5/8 (16)

Refrigerant tube size (Liquid line ) inch (mm) 1/4 ( 6.35 )

Maximum length ft ( m ) 98.4 ( 30 ) Maximum charge-less length ft ( m ) 24.6 ( 7.5 ) Maximum height difference

ft ( m ) 32.8 ( 10 ) Additional charge oz./ft ( g/m ) 0.5 ( 50 ) Drain pipe O.D. inch (mm) 5/8 (16 )

Others

Safety device

Compressor: Thermal protector

Pressure switch

Fuse, Micro computer control

Air llters Polypropylene net (Washable)

Net dimensions

Width ／ Height ／ Depth

inch

(mm)

53-1/7 ／ 12-5/6 ／ 10

( 1350 ／ 326 ／ 253 )

38-4/7 ／ 31-1/9 ／ 16-4/5

( 980 ／ 790 ／ 427 )

Net weight lb. (kg) 41.9 ( 19 ) 161 ( 73 )

NOTE: Test conditions are based on AHRI 210/240. ( Refrigerant piping length : 25ft [7.6m] )

* : Voltage is 230V

AY-X36RU AE-X36RU

[2] EXTERNAL DIMENSION

Indoor Unit

12.8 (326)

10.0 (253)

3.64 (92.5)

2.2 (56)

3.64 (92.5)

6.7 (170)

53.1 (1350)

Unit: inch (mm)

Thickness: 0.9 (22.5) Thickness: 0.93 (23.5)

Outdoor Unit

14.6 (371)

36 (914.1)

24 (609.6)

15.7 (398.8)

31.1 (790)

38.6 (980)

16.7 (424.2)

Unit: inch (mm)

AY-X36RU AE-X36RU

ELECTRIC CIRCUIT

[1] WIRING DIAGRAM

Instruction

Symbol Symbol Color or Name Symbol Symbol Color or Name

WH White BN Brown

YE Yellow BU Blue

RD Red BK Black

YEGN Yellow/Green OG Orange

VT Violet CAP Jumper cap

GN Green COMP Compressor

NOTE: Jumper cap is used to determine fan speed and the swing angle of horizontal lover for this model.

Indoor Unit

Please don't touch any electronic component or terminal when the machine

is running,stopping or

has been powered off for

less than 3 minutes to

prevent electric shock !

Outdoor Unit

Please don't touch any electronic component or terminal when the machine is running , stopping or has been powered off for less than 30 minutes to prevent the risk of electric shock !

NOTE: Motor ground only applies to the

iron shell motor.

AY-X36RU AE-X36RU

[2] CONTROL UNIT PWB WRING

INDOOR

76543

1 Interface of fan motor 2 Interface of communication 3 Power supply neutral wire 4 Fuse 5 Power supply live wire 6 Interface of live wire for health function 7 Interface of wired controller 8 Interface of BMS

9 Auto button 10 Jumper cap 11 Interface of up and down swing terminal 12 Interface of left and right swing terminal 13 Ambient temperature sensor interface 14 Indoor tube temperature sensor interface 15 Interface of display 16 Fuse 17 High-frequency terminal

OUTDOOR

4 5 6 7 8

14 15

1 Interface of reactor 1 10 Interface of outdoor fan

2 Interface of reactor 2 11 Electric heater band of chassis HEAT2-L 3 U, V, W three-phase interface of compressor 12 Electric heater band of compressor HEAT1-L 4 Overload protection terminal of compressor OVC-COMP

Interface of neutral wire for compressor electric heating and chassis electric heating

5 Terminal of temperature sensor CN2 6 High pressure protection terminal HPP 14 Interface of live wire 7 Electric expansion valve terminal EV 15 Interface of neutral wire 8 Interface of indoor unit and outdoor unit communication 16 Interface of ground wire 9 Interfacel of 4-way valve 17 Interface of reactor1 and reactor2

AY-X36RU AE-X36RU

FUNCTION AND CONTROL

[1] Remote Control Introduction

Buttons on the Remote Control

1 ON/OFF Button

2 MODE Button

3 FAN Button

4 SWING Button

5 TURBO FAN Button

/ Button

7 SLEEP Button

8 TEMP Button

9 COMFORT Button

10 DISPLAY Button

11 CLOCK Button

12 TIMER ON/TIMER OFF Button

5 6

MODE FAN

TURBO

TEMP

DISPLAY

COMFORT

TIMERONTIMER

OFF

ON/OFF

SWING

SLEEP

CLOCK

Note:

● Once popower is connected, the air conditioner will give out a sound. Operation indictor “ “ is ON (red indicator). After that, the

air conditioner can be operated by using the remote controller.

● Under ON status, pressing the button on the remote controller, the signal icon “ “on the display of remote controller will blink once and the air conditioner will give out a “de” sound, which means the signal has been sent to the air conditioner.

● Under OFF status, set temperature and clock icon will be displayed on the display of remote controller (If timer on, timer off and

light functions are set, the corresponding icons will be displayed on the display of remote controller at the same time); Under ON status, the display will show the corresponding set function icons.

1. ON/OFF button

Press this button can turn on or turn off the air conditioner. After turning on the air conditioner, operation indicator " "on indoor

unit’s display is ON (green indicator), and indoor unit will give out a sound.

2. MODE button

Press this button to select your required operation mode.

● When selecting auto mode, air conditioner will operate automatically according to ex-factory setting. Set temperature can’t be

adjusted and will not be displayed as well. Press "FAN" button can adjust fan speed. Press "SWING" button can adjust fan blowing angle.

● After selecting cool mode, air conditioner will operate under cool mode. Cool indicator " "on indoor unit is ON. Press "▲" or " ▲" button to adjust set temperature. Press "FAN" button to adjust fan speed. Press "SWING" button to adjust fan blowing angle.

● When selecting dry mode, the air conditioner operates at low speed under dry mode. Dry indicator " " on indoor unit is ON.

Under dry mode, fan speed can’t be adjusted. Press "SWING" button to adjust fan blowing angle.

● When selecting fan mode, the air conditioner will only blow fan, no cooling and no heating. All indicators are OFF. Press "FAN"

button to adjust fan speed. Press "SWING" button to adjust fan blowing angle.

AY-X36RU AE-X36RU

● When selecting heating mode, the air conditioner operates under heat mode. Heat indicator " " on indoor unit is ON. Press "▲" or "▼" button to adjust set temperature. Press "FAN" button to adjust fan speed. Press "SWING" button to adjust fan blowing

angle. (Cooling only unit won’t receive heating mode signal. If setting heat mode with remote controller, pressing ON/OFF button can’t start up the unit).

Note:

● To preven cold air after starting up in heating mode, indoor unit will delay 1~5 minutes to blow air (actual delay time is depend

on indoor ambient temperature).

● Set temperature range from remote controller: 16~30°C(61°F~86°F); Fan speed: auto, low speed, medium speed, high speed.

3. FAN button

Pressing this button can set fan speed circularly as: auto (AUTO), low ( ), medium ( ), high ( ).

Auto

Note:

● Under AUTO speed, air conditioner will select proper fan speed automatically.

● Fan speed under dry mode is low speed.

4. SWING button

Press this button can select up&down swing angle. Fan blow angle can be selected circularly as below:

(horizontal louvers stops at current position)

● When selecting " ", air conditioner is blowing fan automatically. Horizontal louver will automatically swing up & down at maximum angle.

● When selecting "

, , , ,

", air conditioner is blowing fan at xed position. Horizontal louver will stop at the xed

position.

● When selecting "

, ,

" , air conditioner is blowing fan automatically.

● Hold " "button above 2seconds to set your required swing angle. When reaching your required angle, release the button.

5. TURBO FAN button

Under COOL or HEAT mode, press this button to turn to quick COOL or quick HEAT mode. " " icon is displayed on remote

controller. Press this button again to exit TURBO FAN function and " " icon will disappear.

6. ▲/▼ button

● Press "▲" or "▼" button once increase or decrease set temperature 1°C(1~2°F). Holding "▲" or "▼" button, 2seconds later, set temperature on remote controller will change quickly. On releasing button after setting is nished, temperature indicator on

indoor unit will change accordingly. (Temperature can’t be adjusted under auto mode)

● When setting TIMER ON, TIMER OFF or CLOCK, press "▲" or "▼" button to adjust time. (Refer to CLOCK, TIMER ON, TIMER OFF buttons) When setting TIMER ON, TIMER OFF or CLOCK, press "▲" or "▼" button to adjust time. (Refer to CLOCK,

TIMER ON, TIMER OFF buttons)

7. SLEEP button

Under COOL or HEAT mode, press this button to start up SLEEP function. " " icon is displayed on remote controller. Press this

button again to cancel SLEEP function and " " icon will disappear.

8. TEMP button

By pressing this button, the indoor set temperature, indoor ambient temperature or outdoor ambient temperature is shown on the

indoor unit’s display. The setting on remote controller is selected circularly as below:

● When selecting " " or no display with remote controller, temperature indicator on indoor unit displays set temperature.

● When selecting " " with remote controller, temperature indicator on indoor unit displays indoor ambient temperature.

● When selecting " " with remote controller, temperature indicator on indoor unit displays outdoor ambient temperature.

Outdoor temperature display is not applicable for this unit. The temperature indicator displays indoor set temperature.

Note:

● It’s defaulted to display set temperature when turning on the unit.There is no display in the remote controller.

● Only for the models whose indoor unit has dual-8 display.

● When the selecting display of indoor or outdoor ambient temperature, indoor temperature indicator displays corresponding temperature and automatically turn to display set temperature after three or ve seconds.

AY-X36RU AE-X36RU

9. COMFORT button

Press this button to start COMFORT function and " " will be displayed on the remote controller. After this function is set, the

remote controller will send the detected ambient temperature to the controller and the unit will automatically adjust the indoor temperature according to the detected temperature. Press this button again to cancel COMFORT function and "

" will disappear.

● Please put the remote controller near user when this function is set. Do not put the remote controller near the object of high

temperature or low temperature in order to avoid detecting inaccurate ambient temperature.

10. DISPLAY Button

Press this button to turn off the display light on the indoor unit. " " icon on the remote controller disappears. Press this button

again to turn on the display light. " " icon is displayed.

11. CLOCK Button

Press this button to set the clock time. " " icon on the remote controller will blink. Press "▲" or "▼" button within 5seconds to set

the clock time. Each pressing of "▲" or "▼" button, clock time will increase or decrease 1 minute. If hold "▲" or "▼" button, 2seconds later, time will change quickly. Release this button when reaching your required time. Press "CLOCK" button to conrm

the time. " " icon stops blinking.

Note:

● Clock time adopts 24-hour mode.

● The interval between two operation can’t exceeds 5seconds. Otherwise, remote controller will quit setting status. Operation for

TIMER ON/TIMER OFF is the same.

12. TIMER ON / TIMER OFF button

● TIMER ON button

"TIMER ON" button can set the time for timer on. After pressing this button, " " icon disappears and the word "ON" on remote

controller blinks. Press "▲" or "▼"button to adjust TIMER ON setting. After each pressing "▲" or "▼" button, TIMER ON setting will increase or decrease 1min. Hold "▲" or "▼" button, 2seconds later, the time will change quickly until reaching your required time. Press "TIMER ON" to conrm it. The word "ON" will stop blinking. " " icon resumes displaying. Cancel TIMER ON: Under

the condition that TIMER ON is started up, press "TIMER ON" button to cancel it.

● TIMER OFF button

"TIMER OFF" button can set the time for timer off. After pressing this button," " icon disappears and the word "OFF" on

remote controller blinks. Press "▲" or "▼" button to adjust TIMER OFF setting. After each pressing "▲" or "▼" button, TIMER OFF setting will increase or decrease 1min. Hold "▲" or "▼" button, 2seconds later, the time will change quickly until reaching

your required time. Press "TIMER OFF" word "OFF" will stop blinking. "

" icon resumes displaying. Cancel TIMER OFF.

Under the condition that TIMER OFF is started up, press "TIMER OFF" button to cancel it.

Note:

● Under on and off status, you can set TIMER OFF or TIMER ON simultaneously.

● Before setting TIMER ON or TIMER OFF, please adjust the clock time.

● After starting up TIMER ON or TIMER OFF, set the constant circulating valid. After that, air conditioner will be turned on or

turned off according to setting time. ON/OFF button has no effect on setting. If you don’t need this function, please use remote controller to cancel it.

Function Buttons on the Remote Control

1. Energy-saving function (This function is not explained on the operation manual nor the catalogue)

Under cooling mode, press "TEMP" and "CLOCK" buttons simultaneously to start up or turn off the energy-saving function.

When the energy-saving function is started up, "SE" will be shown on remote controller, and air conditioner will adjust the set temperature automatically according to ex-factory setting to reach to the best energy-saving effect. Press "TEMP" and "CLOCK"buttons simultaneously again to exit energy-saving function.

Note:

● Under the energy-saving function, fan speed is defaulted at auto speed and it can’t be adjusted.

● Under the energy-saving function, set temperature can’t be adjusted. Press "TURBO" button and the remote controller won’t

send signal.

● Sleep function and energy-saving function can’t operate at the same time. If energy-saving function has been set under cooling

mode, press sleep button will cancel energy-saving function. If sleep function has been set under cooling mode, start up the energy-saving function will cancel sleep function.

2. 8°C (46°F) heating function (This function is not explained on the operation manual nor the catalogue)

Under heating mode, press "TEMP" and "CLOCK" buttons simultaneously to start up or turn off the 8°C heating function. When

this function is started up, " " and "8°C" will be shown on the remote controller, and the air conditioner keep the heating status at 8°C. Press "TEMP" and "CLOCK" buttons simultaneously again to exit 8°C heating function.

Note:

● Under the 8°C heating function, fan speed is defaulted at auto speed and it can’t be adjusted.

● Under the 8°C heating function, set temperature can’t be adjusted. Press "TURBO" button and the remote controller won’t send

signal.

● The sleep function and the 8°C heating function can’t operate at the same time. If 8°C heating function has been set under cooling mode, press sleep button will cancel 8°C heating function. If sleep function has been set under cooling mode, start up the 8°C heating function will cancel sleep function.

AY-X36RU AE-X36RU

● Under °F temperature display, the remote controller will display 46°F heating.

3. Lock function

Press "▲" and "▼" simultaneously to turn on or turn off lock function. When lock function is on, " " icon is displayed on remote

controller. If you operate the remote controller, the " " icon will blink three times without sending signal to the unit.

4. Temperature display switch over function

Under OFF status, press "▲" and "MODE" buttons simultaneously to switch temperature display between °C and °F.

Operation guide

1. Once power is connected, press "ON/OFF" button on remote controller to turn on the air conditioner.

2. Press "MODE" button to select your required mode: AUTO, COOL, DRY, FAN, HEAT.

3. Press "▲" or "▼" button to set your required temperature. (Temperature can’t be adjusted under auto mode).

4. Press "FAN" button to set your required fan speed: auto, low, medium and high speed.5. Press "SWING" button to select fan blowing angle.

Replacement of batteries in remote controller

1. Press the back side of remote controller marked with " ", as shown in the g, and then push out the cover of battery box along the arrow direction.

2. Replace two 7# (AAA 1.5V) dry batteries, and make sure the position of "+" polar and "-" polar are correct.

3. Reinstall the cover of the battery box.

Battery

Cover of battery box

Reinstall

Remove

Signal sender

Note:

● During operation, point the remote control signal sender at the receiving window of the indoor unit.

● The distance between signal sender and receiving window should be no more than 8m, and there should be no obstacles between

them.

● Signal may be interfered easily in the room where there is uorescent lamp or wireless telephone; remote controller should be close

to indoor unit during operation.

● Replace new batteries of the same model when replacement is required.

● When you don’t use remote controller for a long time, please take out the batteries.

● If the display on remote controller is fuzzy or there’s no display, please replace batteries.

AY-X36RU AE-X36RU

TROUBLESHOOTING

[1] Error Code List

NO.

Malfunction

Name

Display Method of Indoor Unit Display Method of Outdoor Unit

A/C status Possible Causes

Dual 8

Code

Display

Indicator Display (during blink-

ing, ON 0.5s and OFF 0.5s)

Indicator has 3 kinds of display status and during blinking, ON

0.5s and OFF 0.5s

Operation

Indicator

Cool

Indicator

Heating

Indicator

Yellow

Indicator

Red

Indicator

Green

Indicator

High pressure protection of system

OFF 3s and blink once

During cooling and drying operation, except indoor fan operates, all loads stop operation. During heating operation, the complete unit stops.

Possible reasons:

1. Refrigerant was superabundant;

2. Poor heat exchange (including fifth blockage of heat exchanger and bad radiating environment ); Ambient temperature is too high.

Antifreezing protection

OFF 3S and blink twice

OFF 1S and blink 3 times

During cooling and drying operation, compressor and outdoor fan stop while indoor fan operates.

1. Poor air-return in indoor unit;

2. Fan speed is abnormal;

3. Evaporator is dirty.

In defect of refrigerant

OFF 1S and blink 9 times

The Dual 8 Code Display will show F0 and the complete unit stops.

1. In defect of refrigerant;

2. Indoor evaporator temperature sensor works abnormally;

3. The unit has been plugged up somewhere.

High discharge temperature protection of compressor

OFF 3S and blink 4 times

OFF 1S and blink 7 times

During cooling and drying operation, compressor and outdoor fan stop while indoor fan operates. During heating operation, all loads stop.

Please refer to the malfunction analysis (discharge protection, overload).

Over current protection

OFF 3S and blink 5 times

OFF 1S and blink 5 times

During cooling and drying operation, compressor and outdoor fan stop while indoor fan operates. During heating operation, all loads stop.

1. Supply voltage is unstable;

2. Supply voltage is too low and

load is too high;

3. Evaporator is dirty.

Communication Malfunction

OFF 3S and blink 6 times

Always ON

During cooling operation, compressor stops while indoor fan motor operates. During heating operation, the complete unit stops.

Refer to the corresponding malfunction analysis.

High temperature resistant protection

OFF 3S and blink 8 times

OFF 1S and blink 6 times

During cooling operation: compressor will stop while indoor fan will operate.

During heating operation, the complete unit stops.

Refer to the malfunction analysis (overload, high temperature resistant).

EEPROM malfunction

OFF 3S and blink 15 times

OFF 1S and blink 11 times

During cooling and drying operation, compressor will stop while indoor fan will operate; During heating operation, the complete unit will stop

Replace outdoor control panel AP1

Limit/decrease frequency due to high temperature of module

OFF 3S and blink 6 times

All loads operate normally, while operation frequency for compressor is decreased

Discharging after the complete unit is de-energized for 20mins, check whether the thermal grease on IPM Module of outdoor control panel AP1 is sufficient and ahether the radiator is inserted tightly. If its no use, please replace control panel AP1

Malfunction protection of jumper cap

OFF 3S and blink 15 times

Wireless remote receiver and button are effective, but can not dispose the related command

1. No jumper cap insert on main board.

2. Incorrect insert of jumper cap.

3. Jumper cap damaged.

4. Abnormal detecting circuit of main board.

Gathering refrigerant

OFF 3S and blink 1 times

OFF 1S and blink 17 times

When the outdoor unit receive signal of Gathering refrigerant

,the system will be forced to run under cooling mode for gathering refrigerant

Nominal cooling mode

Indoor ambient temperature sensor is open/ short circuited

OFF 3S and blink once

During cooling and drying operation, indoor unit operates while other loads will stop; during heating operation,

the complete unit will stop operation.

1. Loosening or bad contact of indoor ambient temp. sensor and main board terminal.

2. Components in main board fell down leads short circuit.

3. Indoor ambient temp. sensor damaged.(check with sensor resistance value chart)

4. Main board damaged.

Indoor evaporator temperature sensor is open/short circuited

OFF 3S and blink twice

AC stops operation once reaches the setting temperature. Cooling, drying: internal fan motor stops operation while other loads stop operation; heating: AC stop operation

1. Loosening or bad contact of Indoor evaporator temp. sensor and main board terminal.

2. Components on the main board fall down leads short circuit.

3. Indoor evaporator temp. sensor damaged.(Check temp. sensor value chart for testing)

4. Main board damaged.

AY-X36RU AE-X36RU

NO.

Malfunction

Name

Display Method of Indoor Unit Display Method of Outdoor Unit

A/C status Possible Causes

Dual 8

Code

Display

Indicator Display (during blink-

ing, ON 0.5s and OFF 0.5s)

Indicator has 3 kinds of display

status and during blinking, ON

0.5s and OFF 0.5s

Operation

Indicator

Cool

Indicator

Heating

Indicator

Yellow

Indicator

Red

Indicator

Green

Indicator

Outdoor ambient temperature sensor is open/short circuited

OFF 3S and blink 3 times

OFF 1S and blink 6 times

During cooling and drying operating, compressor stops while indoor fan operates; During heating operation, the complete unit will stop operation

Outdoor temperature sensor hasn’t been connected well or is damaged. Please check it by referring to the resistance table for temperature sensor)

Outdoor condenser temperature sensor is open/ short circuited

OFF 3S and blink 4 times

OFF 1S and blink 5 times

During cooling and drying operation, compressor stops while indoor fan will operate; During heating operation, the complete unit will stop operation.

Outdoor temperature sensor has not been connected well or is damaged. Please check it by referring to the resistance table for temperature sensor)

Outdoor discharge temperature sensor is open/ short circuited

OFF 3S and blink

5 times

OFF 1S and blink 7 times

During cooling and drying operation, compressor will sop after operating for about 3 mins, while indoor fan will operate; During heating operation, the complete unit will stop after operating for about 3 mins.

1. Outdoor temperature sensor has not been connected well or is damaged. Please check it by referring to the resistance table for temperature sensor)

2. The head of temperature sensor has not been inserted into the copper tube

Limit/ decrease frequency due to overload

OFF 3S and blink for 6 times

OFF 1S and blink 3 times

All loads operate normally, while operation frequency for compressor is decreased

Refer to the malfunction analysis (overload, high temperature resistant)

Decrease frequency due to overcurrent

OFF 3S and blink 8 times

OFF 1S and blink once

All loads operate normally, while operation frequency for compressor is decreased

The input supply voltage is too low; System pressure is too high and overload

Decrease frequency due to high air discharge

OFF 3S and blink 9 times

OFF 1S and blink twice

All loads operate normally, while operation frequency for compressor is decreased

Overload or temperature is too high; Malfunction of electric expansion valve (EKV)

Limit/ decrease frequency due to antifreezing

OFF 3S and blink 2 times

OFF 1S and blink 4 times

All loads operate normally, while operation frequency for compressor is decreased

Poor air-return in indoor unit or fan speed is too low

Voltage for DC bus-bar is too high

OFF 3S and blink 11 times

OFF 1S and blink 13 times

During cooling and drying operation, compressor will stop while indoor fan will operate; During heating operation, the complete unit will stop operation.

1. Measure the voltage of position L and N on wiring board (XT), if the voltage is higher than 265VAC, turn on the unit after the supply voltage is increased to the normal range.

2. If the AC input is normal, measure the voltage of electrolytic capacitor C on control panel (AP1), if its normal, there is malfunction for the circuit, please replace the control panel (AP1)

Voltage of DC bus-bar is too low

OFF 3S and blink

21 times

OFF 1S and blink 12 times

During cooling and drying operation, compressor will stop while indoor fan will operate; During heating operation, the complete unit will stop

1. Measure the voltage of position L and N on wiring board (XT), if the voltage is higher than 150VAC, turn on the unit after the supply voltage is increased to the normal range.

2. If the AC input is normal, measure the voltage of electrolytic capacitor C on control panel (AP1), if its normal, there’s malfunction for the circuit, please replace the control panel (AP1)

Compressor Min frequence in test state