Order No. PHAAM1004150A2

Air Conditioner

CS-ME7KB1E

Please file and use this manual together with the service manual for Model No. CU-2E15LBE CU-2E18LBE CU-3E18LBE CU-4E23LBE, Order No. PHAAM1003090C3 and Model No. CS-ME7CKPG CS-ME10CKPG CS-ME12CKPG CS-ME14CKPG CS-ME18CKPG CU-2E15CBPG CU-2E18CBPG CU-3E23CBPG CU-4E27CBPG, Order No. RAC0209005C2

TABLE OF CONTENTS

PAGE 1 Safety Precautions----------------------------------------------- Features ------------------------------------------------------------- Functions ----------------------------------------------------------- 5 3.1. REMOTE CONTROL ------------------------------------- 5 3.2. INDOOR UNIT --------------------------------------------- Product Specifications ----------------------------------------- Dimensions--------------------------------------------------------- 9 5.1. Cassette Type ---------------------------------------------- 9 5.2. Grille --------------------------------------------------------- Refrigeration Cycle Diagram --------------------------------Block Diagram----------------------------------------------------Wiring Connection Diagram --------------------------------Electronic Circuit Diagram -----------------------------------Operation Details (Functions & Protection) ------------17 10.1. Simultaneous Operation Control----------------------17 10.2. Airflow Direction Control --------------------------------18 10.3. Indoor Fan Control ---------------------------------------19 PAGE 10.4. Drain Pump Control ------------------------------------- 20 10.5. Auto Restart Control------------------------------------- 21 10.6. Other Indoor Unit Operation Functions ------------- 22 Installation Instruction ---------------------------------------- 29 Disassembly of Parts ------------------------------------------ 34 12.1. Detaching the fan motor and cross flow fan------- 34 12.2. Detaching the drain pump ----------------------------- 35 12.3. Detaching the control board --------------------------- 35 12.4. Detaching the louver motor---------------------------- 37 Technical Data --------------------------------------------------- 38 13.1. Operation Characteristics (CU-3E18LBE) --------- 38 13.2. Operation Characteristics (CU-4E23LBE) --------- 40 13.3. Operation Characteristics (CU-4E27CBPG) ------ 42 Exploded View and Replacement Parts List ----------- 44 14.1. Exploded View -------------------------------------------- 44 14.2. Replacement Parts List--------------------------------- 45
Panasonic HA Air-Conditioning (M) Sdn. Bhd. 2010. Unauthorized copying and distribution is a violation of law.

1 Safety Precautions

Read the following SAFETY PRECAUTIONS carefully before perform any servicing. Electrical work must be installed or serviced by a licensed electrician. Be sure to use the correct rating of the power plug and main circuit for the model installed. The caution items stated here must be followed because these important contents are related to safety. The meaning of each indication used is as below. Incorrect installation or servicing due to ignoring of the instruction will cause harm or damage, and the seriousness is classified by the following indications.
This indication shows the possibility of causing death or serious injury.
This indication shows the possibility of causing injury or damage to properties.
The items to be followed are classified by the symbols:
This symbol denotes item that is PROHIBITTED from doing.
Carry out test run to confirm that no abnormality occurs after the servicing. Then, explain to user the operation, care and maintenance as stated in instructions. Please remind the customer to keep the operating instructions for future reference.
1. Engage dealer or specialist for installation and servicing. If installation or servicing done by the user is defective, it will cause water leakage, electrical shock or fire. 2. Install according to this installation instructions strictly. If installation is defective, it will cause water leakage, electrical shock or fire. 3. Use the attached accessories parts and specified parts for installation and servicing. Otherwise, it will cause the set to fall, water leakage, fire or electrical shock. 4. Install at a strong and firm location which is able to withstand the set's weight. If the strength is not enough or installation is not properly done, the set will drop and cause injury. 5. For electrical work, follow the local national wiring standard, regulation and the installation instruction. An independent circuit and single outlet must be used. If electrical circuit capacity is not enough or defect found in electrical work, it will cause electrical shock or fire. 6. Use the specified cable and connect tightly for indoor / outdoor connection. Connect tightly and clamp the cable so that no external force will be acted on the terminal. If connecting or fixing is not perfect, it will cause heat-up or fire at the connection. 7. Wire routing must be properly arranged so that control board cover is fixed properly. If control board cover is not fixed perfectly, it will cause heat-up or fire at connection point of terminal, fire or electrical shock. 8. When connection the piping, do not allow air or any substances other than the specified refrigerant to enter refrigeration cycle. Otherwise, this may lower capacity, cause abnormal high pressure in the refrigeration cycle, and possibly result in explosive and injury. 9. Thickness of copper pipes used must be more than 0.8mm. Never use copper pipes thinner than 0.8mm.

10. It is desirable that the amount of residual oil is less than 40mg/10m. 11. Do not modify the length of the power supply cord or use of the extension cord, and do not share the single outlet with other electrical appliances. Otherwise, it will cause fire or electrical shock.
1. The equipment must be earthed. It may cause electrical shock if grounding is not perfect. 2. Do not install the unit at place where leakage of flammable gas may occur. In case gas leaks and accumulates at surrounding of the unit, it may cause fire. 3. Carry out drainage piping as mentioned in installation instructions. If drainage is not perfect, water may enter the room and damage the furniture.
4. Pb free solder has a higher melting point than standard solder; typically the melting point is 50F - 70F (30C - 40C) higher. Please use a high temperature solder iron. In case of the soldering iron with temperature control, please set it to 700 20F (370 10C). Pb free solder will tend to splash when heated too high (about 1100F / 600C).
1. Selection of the installation location. Select an installation which is rigid and strong enough to support or hold the unit, and select a location for easy maintenance. 2. Power supply connection to the air conditioner. Connect the power supply cord of the air conditioner to the mains using one of the following methods. Power supply point shall be the place where there is ease for access for the power disconnection in case of emergency. In some countries, permanent connection of this room air conditioner to the power supply is prohibited. i. Power supply connection to the receptacle using a power plug. Use an approved power plug with earth pin for the connection to the socket. ii. Power supply connection to a circuit breaker for the permanent connection. Use an approved circuit breaker for the permanent connection. It must be a double pole switch with a minimum 3.5 mm contact gap. 3. Do not release refrigerant during piping work for installation, servicing, reinstallation and during repairing a refrigerant parts. Take care of the liquid refrigerant, it may cause frostbite. 4. Installation work: It may need two people to carry out the installation or servicing work. 5. Do not install this appliance in a laundry room or other location where water may drip from the ceiling, etc.

2 Features

Product - A single OUTDOOR unit enables air conditioning of up to four separate rooms
Remarks: 1. At least two indoor units must be connected. 2. The total nominal cooling capacity of indoor units that will be connected to outdoor unit must be within connectable capacity range of outdoor unit. (Shown in the above table) Example: The below indoor units combination is not possible to connect CU-3E23LBE. (Total nominal capacity of indoor unit is between 5.0kW and 10.0kW) 1) Two CS-ME7KB1E only. (Total nominal cooling capacity is 4.4kW) - Inverter controlled for High energy efficiency and optimal comfort - New refrigerant R410A is used for protecting ozone layer - Lead - free P.C. Board Serviceability - Self diagnosis - Test Run at both Cooling and Heating rated frequency Built-in drain pump - A drain pump is built in. The pipe can rise to 200 mm above the drain outlet.

3 Functions

3.1. REMOTE CONTROL

INDOOR UNIT

4 Product Specifications
Model Item Power Source Air Volume Cooling Heating Noise Level Cooling (Power) Heating (Power) Moisture Removal Refrigeration piping Connection Type of pipe Type of Indoor/ Outdoor connecting cable Drain opening Dimension Net Weight Fan Type Motor Heat exchanger Adjustments Switches Timer Temperature Air filter Type Output W mm mm mm kg
CS-ME7KB1E Cassette Type Outdoor power (single 230V 50Hz) m3/min m /min dB (A) (dB) dB (A) (dB) L/h Liquid Gas mm mm
9.1 10.1 Hi:40(53) Lo: 32(45) Hi:42(55) Lo: 32(45) 1.3 6.35 (1/4") Flare to the main unit 9.52 (3/8") Flare to the main unit CZ-3F 4 x 1.5 mm flexible cord, type designation 245 IEC 57 (H05RN-F) VP20 Height 185 x Width 770 x Depth 360 9.8 Cross-flow fan DC brushless motor (ARW50A8P30AC) 4P 25W 40V A98258 Plate fin forced-draft Wireless remote control Timer with ON and OFF times programmable Electronic thermostat PP honeycomb
* Specifications are subject to change without notice for further improvement.

5 Dimensions

5.1. Cassette Type

Grille

6 Refrigeration Cycle Diagram

7 Block Diagram

8 Wiring Connection Diagram
9 Electronic Circuit Diagram
10 Operation Details (Functions & Protection)
10.1. Simultaneous Operation Control
1. Operation modes which can be selected using the remote control unit: Automatic, Cooling, Soft Dry, Heating, Fan operation mode. 2. Types of operations modes which can be performed simultaneously Cooling operation and cooling, Dry or fan operation Heating operation and heating operation 3. Types of operation modes which cannot be performed simultaneously While a cooling operation is in progress, a heating operation cannot be performed by an indoor unit in another room. In the room where the operation button for cooling was pressed first, the operation is continued. In the room where the operation button for heating was pressed afterward, the operation lamp of the indoor unit blinks, where the attempt is made to establish the heating operation. Its fan is stopped, and the air does not discharged. While a heating operation is in progress, a cooling operation cannot be performed by an indoor unit in another room. In the room where the operation button for heating was pressed first, operation is continued. In the room where the operation button for cooling was pressed afterward, the operation lamp of the indoor unit blinks, where the attempt is made to establish the cooling operation. Its fan is stopped, and the air does not discharged. 4. Operation mode priority control The operation mode designated first by the indoor unit has priority. If the priority indoor unit stops operation or initiates the fan operation, the priority is transferred to other indoor units. Waiting denotes the standby status in which the operation lamp LED blinks (ON for 2.5 sec. and OFF for 0.5 sec.), and the fan is stopped.

* In the fan mode, priority is transferred to a non-priority unit. Note C: Cooling operation mode D: Soft Dry operation mode H: Heating operation mode F: Fan operation mode
10.2. Airflow Direction Control
The following shows how louver operation changes depending on the direction set with the AIR SWING button and other operating conditions.
The louver stops at the CLOSE position when the power switch or breaker is ON. The louver stops at their current position when the power switch or breaker is OFF. Move the horizontal airflow direction control louver manually.

10.3. Indoor Fan Control

The following shows how fan speed changes depending on the setting made with the FAN SPEED button and other operating conditions. Actual fan speed may differ from that you set with remote control.

10.4. Drain Pump Control

Basic operation The drain pump starts 50 seconds after the indoor unit starts or the thermostat comes on (i.e., 10 seconds after the fan motor starts). The drain pump stops 30 seconds after the indoor unit stops or the thermostat turns off. The drain pump repeats a cycle of on for 30 seconds then off for between 50 and 90 seconds as long as the unit is operating. Operation while the unit is off is determined by the difference between the temperature setting and the room temperature.
Float switch operation When the float switch turns on for 10 seconds continuously, the thermostat of the indoor unit turns off and the drain pump operates continuously. When the float switch stays on for 150 seconds continuously, the drain pump and indoor unit stop and the timer lamp flashes indicating an H21 error.
10.5. Auto Restart Control
if there is a power failure, operation will automatically be restarted when the power is resumed. It will start with the previous operation mode and airflow direction. (Time Delay Safety Control is valid) 1. Control start conditions <1> The 24-hour timer must not be set. <2> The sleep timer must not be set.
Auto restart control is not available when timer or sleep mode is set.
2. Description of control <1> In the case of manual operation, the operation mode, temperature setting, fan speed and airflow direction before the power is turned off are restored. <2> In the case of automatic operation, after the power is restored operation starts with the determination of the mode. <3> While the air conditioner odour clear timer has been set, the setting is cancelled, and operation is transferred to the mode before the power is turned off. <4> While the air conditioner odour clear operation (with timer / without timer setting) are being performed, both of these operations are completed, and operation is transferred to the operation mode prior to these operations.

Example: When the power is turned off during an outdoor unit cooling operation
10.6. Other Indoor Unit Operation Functions

10.6.1. Auto button

Proceed with operation when the air conditioner is stopped. (When the auto button is pressed during operation, the air conditioner is stopped.)
1. Emergency operation Press the auto button and release it within 5 seconds to perform emergency operation. Under normal condition (failure is not occurred) automatic operation is performed. In the event of a failure that still enables operation to be performed, emergency operation is performed. 2. Forced cooling operation Keep pressing the auto button until one beep sounds to perform the automatic cooling operation. The air conditioner does not operate for 2 minutes if the room temperature is low (intake temperature below 16 C) so just wait. The forced operation is performed after the 2 minutes have elapsed. 3. Forced heating operation First press the auto button until one beep sounds, and then set it to OFF.Now press the auto button until two beeps sound to perform the automatic heating operation. 4. Select Remote Control Transmission Code There are 4 types of remote control transmission code could be selected and stored in EEPROM of indoor unit. The indoor unit will only operate when received signal with same transmission code from remote control. This could prevent signal interference when there are 2 more indoor unit installed nearby together. To change remote control transmission code, short or open jumpers at the remote control printed circuit board.

10.6.2. Drain Test

When installing the unit and you want the drain pump to operate independently, press the DRAIN TEST switch to operate it for about 5 minutes.
10.6.3. Self Diagnosis display 10.6.3.1. BreakDown Self Diagnosis Function (Three Digits Alphanumeric Code)
Once abnormality has been detected during operation, the unit will immediately stop its operation. (Timer LED blinks.) Although timer LED goes off when power supply is turned off, if the unit is operated under a breakdown condition, the LED will light up again. In operation after breakdown repair, error code is not displayed. The last error code (abnormality) will be saved in IC memory. Timer LED Blinking in Abnormal Operation: 1. Automatically stops the operation. 2. Timer LED on display of the indoor unit blinks. 3. The LED will be off if the unit is turned off or the Error RESET button on the remote controller is pressed. To display memorized error (Protective operation) status: 1. Turn the unit on. 2. Press the CHECK button on the remote controller for continuously 5 seconds or more with a pointed object to appear -- on the display. 3. Press the TIMER or button on the remote controller to appear H00 on the display. Signal is transmitted to the main unit. 4. Press the TIMER button (When the button is pressed, the display goes back.) repeatedly and slowly until Beeps sound (about 5 seconds intermittently) is heard from main unit. 5. Then, displayed error code matches to the error code saved in unit memory. The power LED on the main unit also lights up. Note: When the CHECK button is pressed continuously for 5 seconds again, or when no operation continues for 30 seconds, or when the RESET button on remote controller is pressed with a pointed object, the display is cancelled. To clear memorized error (Protective operation) status after repair: 1. Press the AUTO button in main unit continuously for 5 seconds or more and release it. (Test run / Pump downoperation: Beep sound) 2. Press the CHECK button on remote controller for about 1 second with a pointed object to transmit signal to main unit. A beep sound is heard from main unit and the data is cleared. Temporary Operation (Depending on breakdown status) 1. Press the ON/OFF button after selecting Cooling or Heating operation. (Receiving Beep sound is heard and the TIMER LED blinks.) 2. The unit can temporarily be used until repaired.

10.6.4. Error Code

Symbol H11 Diagnosis Indoor/outdoor abnormal communication Diagnosis method This error occurs when indoor/outdoor unit communication fails to be established after 30 seconds or more. <Diagnosis checkpoint> 1. Measure the voltage of the indoor/outdoor unit communication cables, and check whether the voltage is being supplied properly to the outdoor unit or whether it is being returned from the outdoor unit to the indoor units. This error occurs when wrong in the total connection capacity and wrong connection in each capacity. The error is determined within 2 minutes after the power is turned on. <Diagnosis checkpoint> 1. Check the total capacity of the units connected and check that the models are compatible for connection. This error occurs when the intake air temperature has exceeded above 46 C continuously for 2 minutes or dropped below -54 C continuously for 5 seconds during operation. <Diagnosis checkpoint> 1. This error occurs when a temperature which is impossibly high or low from a normal standpoint has been detected. Check the sensor, and if open-circulating (more than 500k ohms) or short-circulating (less than 6.5k ohms) is not found, defective contact of the connector is possible. When the total current has dropped below the set current level continuously for 20 seconds during operation beyond the set capacity, operation is stopped. Three minutes later, operation is started up again, and when the trouble occurs on 4 successive occasions, the error occurs (the timer lamp blinks). <Diagnosis checkpoint> 1. Check the refrigerating cycle: Gas may be leaking (the amount of refrigerant is extremely low). 2. Check the control P.C. Board: Check for a broken wire (open-circuit) in the current transformer. (If opencircuit is found, replace the control P.C. Board.) In the case of a scroll compressor (DC motor), H16 is detected only when the regular compressor is operating. High-voltage PWM: When a state in which the fan motor speed is not synchronized with the control signal has been detected on 7 successive occasions: Low-voltage PAM: When the fan lock detection signal has been detected on 7 successive occasions or it has been detected continuously for 25 seconds or when a state in which the fan motor speed is not synchronized with the control signal has been detected on 7 successive occasions: The error occurs (the timer lamp blinks). <Diagnosis checkpoint> 1. Check the nature of the fan lockup trouble. 2. Check for disconnections of the fan motor connectors and for defects in contact, in the fan motor and in the control P.C. Board. Error occurs when the float switch is open for 150 seconds. <Diagnosis checkpoint> 1. Drain blockage. 2. Check the conductivity of float switch. 3. Check that the resistance of the drain motor is about 200 ohms. This error occurs when a temperature of under approximately -40 C or above approximately 80 C has been detected by the heat exchanger temperature sensor continuously for 5 seconds. (This error is not detected during de-icing.) <Diagnosis checkpoint> 1. This error occurs when a temperature which is impossibly high or low from a normal standpoint has been detected. Check the sensor, and if open-circuit (more than 500k ohms) or short-circuit (less than 2.5k ohms) is not found, defective contact of the connector or a defective control P.C. Board is possible. This error occurs when a temperature of under approximately -40 C or above approximately 150 C has been detected by the outdoor air temperature sensor for 2 to 5 seconds. (This error is not detected during de-icing.) <Diagnosis checkpoint> 1. This error occurs when a temperature which is impossibly high or low from a normal standpoint has been detected. Check the sensor, and if open-circuit (more than 500k ohms) or short-circuit (less than 0.5k ohms) is not found, defective contact of the connector or a defective control P.C. Board is possible. This error occurs when a temperature of under approximately -60 C or above approximately 110 C has been detected by the heat exchanger temperature sensor for 2 to 5 seconds. (This error is not detected during deicing.) <Diagnosis checkpoint> 1. This error occurs when a temperature which is impossibly high or low from a normal standpoint has been detected. Check the sensor, and if open-circuit (more than 500k ohms) or short-circuit (less than 0.5k ohms) is not found, defective contact of the connector or a defective control P.C. Board is possible.

Indoor unit capacity unmatched

Intake air temp. sensor

Outdoor Current Transformer
Indoor fan motor mechanism lock
Indoor float switch abnormality
Indoor heat exchanger temp. sensor

Outdoor air temp. sensor

Outdoor heat exchanger temp. sensor 1

Symbol H30

Diagnosis Outdoor discharge pipe temp. sensor
Diagnosis method Disconnected discharge sensor When the condensation temperature is higher than the discharge temperature + (plus) 6 C, a sensor disconnection is detected, operation stops, and the error occurs (the timer lamp blinks). <Diagnosis checkpoint> 1. This error occurs when a temperature which is impossibly high or low from a normal standpoint has been detected. Check the sensor, and if open-circuit (more than 500k ohms) or short-circuit (less than 0.5k ohms) is not found, defective contact of the connector or a defective control P.C. Board is possible. This error occurs when a temperature of under approximately -60 C or over approximately 110 C has been detected continuously for 2 to 5 seconds by the outlet temperature sensor of the heat exchanger. <Diagnosis checkpoint> 1. This error occurs when a temperature which is impossibly high or low from a normal standpoint has been detected. Check the sensor, and if open-circuit (more than 500k ohms) or short-circuit (less than 0.5k ohms) is not found, defective contact of the connector or a defective control P.C. Board is possible. This error occurs when a temperature of under -43 C or above 80 C has been detected by the outdoor unit radiator fin sensor continuously for 2 seconds. <Diagnosis checkpoint> 1. This error occurs when a temperature which is impossibly high or low from a normal standpoint has been detected. Check the sensor, and if open-circuit (more than 500k ohms) or short-circuit (less than 0.5k ohms) is not found, defective contact of the connector or a defective control P.C. Board is possible. This error occurs if the float switch is open three times for 10 seconds or more during a twenty-minute period. <Diagnosis checkpoint> 1. Drain blockage. 2. Check the conductivity of float switch. 3. Check that the resistance of the drain motor is about 200 ohms. This error occurs when a temperature of under -45 C or above approximately 149 C has been detected by the outdoor unit gas side pipe temperature sensor continuously for 2 to 5 seconds. <Diagnosis checkpoint> 1. This error occurs when a temperature which is impossibly high or low from a normal standpoint has been detected. Check the sensor, and if open-circuit (more than 500k ohms) or short-circuit (less than 0.5k ohms) is not found, defective contact of the connector or a defective control P.C. Board is possible. This error occurs when a temperature of under -45 C or above 149 C has been detected by the outdoor unit liquid side pipe temperature sensor continuously for 2 seconds. <Diagnosis checkpoint> 1. This error occurs when a temperature which is impossibly high or low from a normal standpoint has been detected. Check the sensor, and if open-circuit (more than 500k ohms) or short-circuit (less than 0.5k ohms) is not found, defective contact of the connector or a defective control P.C. Board is possible. This error occurs in rooms other than one in which indoor freezing error has occurred when the pipes have been connected incorrectly, when an outdoor expansion valve is defective or when an expansion valve connector has become disconnected. When the fan motor speed detected when its maximum output is demanded is below 30 rpm. continuously for 15 seconds, the fan motor stops for 3 minutes and then restarted. When this happens on 16 occasions (the error is cleared when the value is normal for 5 minutes), the H97 diagnostic symbol is stored in the memory, and the fan motor stops. <Diagnosis checkpoint> 1. Check the nature of the fan lockup error. 2. Check for disconnections of the fan motor connectors and for defects in contact, in the fan motor and in the control P.C. Board. The restriction on the compressor frequency is started when the temperature of the indoor unit heat exchanger source is between 50 C and 52 C, the compressor stops at a temperature from 62 C to 65 C, it is restarted 3 minutes later at below 62 C to 65 C, and the restriction on the compressor frequency is released at a temperature between 48 C and 50 C. (No error occurs.) <Diagnosis checkpoint> 1. Check the indoor unit heat exchanger temperature sensor (check for changes in its characteristics and check its resistance): Symptoms include no hot start when operation is started, a failure of the thermostat to turn on (no outdoor unit operation). And, frequent repetition of stopping and startup. 2. Check also for short-circuits indoors and clogging of the air filters.

Outdoor heat exchanger temp. sensor 2 (discharge pipe temp.)
Outdoor heatsink temp. sensor
Drainage or drain pump abnormality
Outdoor gas pipe temp. sensor
Outdoor liquid pipe temp. sensor
Abnormal indoor operating unit or standby units Outdoor fan motor mechanism lock
Indoor high pressure protection

Symbol H99

Diagnosis Indoor operating unit freezing
Diagnosis method The restriction on the compressor frequency is started when the indoor unit heat exchanger temperature is between 8 C and 12 C. Operation stops if a temperature below 0 C continues for 6 minutes. Three minutes later, operation is started up at a temperature from 3 C to 8 C. The restriction on the compressor frequency is released at a temperature between 13 C and 14 C. <Diagnosis checkpoint> 1. A cooling or dry mode operation conducted at a low outside air temperature is mainly to suspect: this is not indicative of any malfunctioning. If the outdoor air temperature rises during automatic operation in the winter months, the dry mode operation is selected. The H99 diagnostic display also appears at such a time. 2. Check the refrigerating cycle: Gas may be leaking (the amount of refrigerant is low) or a pipe may be broken, etc. 3. Check also for short-circuits indoors and clogging of the air filters.
4-way valve switching When a difference of 0 C to 5 C has been detected between the outdoor unit heat exchanger temperature failure and liquid side pipe temperature on 5 occasions, the error occurs. <Diagnosis checkpoint> 1. Check the 4-way valve coil: Check that no power is supplied to the coil during cooling and dry mode operations, and that power is supplied during heating operation. Inspect the coil for broken wires (opencircuit). 2. If the coil trouble-free, the switching action of the 4-way valve may be defective. Indoor standby units freezing When the difference of an intake temperature (room temperature sensor) and the indoor unit heat exchanger temperature (piping sensor) is higher than 10 C or an indoor unit heat exchanger temperature of below -1 C has been detected continuously for 5 minutes, operation stops. Three minutes later, it is started up, and the error occurs when this has occurred on 3 consecutive occasions. <Diagnosis checkpoint> 1. Check the refrigerating cycle: Expansion valve leakage. 2. Check the indoor unit pipe temperature sensor. (Check for changes in its characteristics and check its resistance.)
PFC circuit protection When a DC voltage over 393V to 424V has been detected on 16 occasions, this error occurs. <Diagnosis checkpoint> 1. To check whether the shutting valve has been left close by mistake, operation is performed for one to several minutes after the compressor has started up, F93 is stored in the memory as the symptom, and operation stops. 2. Check the inverter circuit (for open-circuiting) in the control P.C. Board: Check the IPM base current (6 locations) within 3 minutes after the power has been turned back on. As the symptom, F93 is stored in the memory 30 seconds after the compressor has started up, and operation stops. The error occurs after 4 restarts. 3. Check for broken wires (for open-circuiting) in the compressor winding: Approximately 1 ohm under normal conditions for each phase (same symptom as in 2.) 4. Check the power supply voltage has been fluctuating or not. Refrigeration cycle abnormality When the compressor frequency is above 55 Hz and the current drops below the prescribed level continuously for 7 minutes, operation stops, and it is restarted 3 minutes later. When the compressor discharge temperature has exceeded the setting and the expansion valve has remained fully open for 80 seconds, operation stops, and it is restarted 3 minutes later. When the stopping described above has occurred on 4 occasions, operation stops, and the error occurs. <Diagnosis checkpoint> 1. Check the refrigerating cycle: Gas may be leaking (more than one-half of the volume of the gas has gone). The diagnosis displays resulting from a gas leak generally change in the following sequence depending on the extent of the gas leak: H99 F97 F91 H16. The range of this error (F91) is limited. (Compressor protection at the start of the season) When a state in which the rotation of the compressor is not synchronized with the control signal has been detected on 8 successive occasions, operation stops, and the error occurs. <Diagnosis checkpoint> 1. To check whether the shutting valve has been left close by mistake, operation is performed for one to several minutes after the compressor has started up, F93 is stored in the memory as the symptom, and operation stops. 2. Check the inverter circuit (for open-circuit) in the control P.C. Board: Check the IPM base current (6 locations) within 3 minutes after the power has been turned back on. As the symptom, F93 is stored in the memory 30 seconds after the compressor has started up, and operation stops. The error occurs after 4 restarts. 3. Check for broken wires (open-circuit) in the compressor winding: Approximately 1 ohm under normal conditions for each phase (same symptom as in 2.) When error occurs from the electrical parts radiation fin temperature sensor and OLP output during operation, operation stops, and it is restarted 3 minutes later. If the trouble occurs on 4 occasions, operation stops, and the error occurs. <Diagnosis checkpoint> 1. Something may be interfering with the dissipation of the heat outdoors or the outdoor unit fan may be defective. (The outdoor unit fan is not running.) 2. Defective IPM (Outdoor unit control P.C. Board) 3. Gas leaks. Shutting valve is not opened.

Compressor abnormal revolution
IPM (Power transistor module) or compressor overheating

Symbol F97

Diagnosis Compressor high discharge temperature
Diagnosis method This error occurs and operation stops when this happens on 6 occasions (it is cleared when the operation is normal for 20 minutes). <Diagnosis checkpoint> 1. Check the refrigerating cycle: Gas may be leaking (The amount of refrigerant is low). The stopping of the outdoor unit from time to time is a symptom of this error. 2. When operation steps with this error occurs, check the compressor temperature sensor. (Check for changes in its characteristics and check its resistance.) 3. Something may be interfering with the dissipation of the heat outdoors or the outdoor unit fan may be defective. (The fan will not run because of open-circuiting.) (The protection may be activated by an overload, and the F97 error will remain stored in the memory.) When the total current exceeds the setting (17A to 20A), frequency control is started, and if it then exceeds the setting, operation stops, and the error occurs. <Diagnosis checkpoint> 1. Check the AC voltage at the outdoor unit terminal board during operation: The voltage drop must be within 5% of the voltage when operation has stopped (110% of rated voltage even during operation). If the voltage drop exceeds 5% of if the voltage changes suddenly, inspect whether the power supply cord and indoor/outdoor unit connection cables are too long or too small in diameter, etc. 2. Check whether something is interfering with the dissipation of the heat exchanger outdoors (during cooling operation): Normally, the capacity is limited by the current so that outdoor unit doesnt stop, and the diagnostic display does not appear. When Output current error, which occurs when the prescribed current level is exceeded, has occurred on 16 consecutive occasions, operation stops, and the error occurs. <Diagnosis checkpoint> 1. Check whether the compressor is defective (locked up or shorted winding). Check the outdoor unit control P.C. Board.

Total running current protection

DC peak detection

11 Installation Instruction

12 Disassembly of Parts

High voltages are generated in the electrical parts area by the capacitor. Ensure that the capacitor has discharged sufficiently before proceeding with repair work. Failure to heed this caution may result in electric shocks.
12.1. Detaching the fan motor and cross flow fan
1. Open the air inlet section of the front grille. 2. Unscrew the 4 screws on the front grille, then disengage the catches with a screwdriver and detach the front grille. 3. Loosen the screw on the cover and detach the cover. 4. Unscrew the 2 screws on the control section cover. 5. Detach the connectors going from the control board to the drain pump and from the receiver and display sections.
6. Unscrew the screw and disengage the 2 catches on the air outlet grille, then take out the drain pan plug to drain off excess water. 7. Unscrew the 4 screws and disengage the 5 catches on the drain pan.
8. Detach the air guide and unscrew the screw on the heat exchanger. 9. Detach the float switch and unscrew the 3 screws and disengage the 2 catches on the fan motor holder. 10. Loosen the screw fixing the shaft between the cross flow fan and the fan motor and detach the fan motor. 11. Remove the cross flow fan.
12.2. Detaching the drain pump
8. Unscrew the screw on the drain pump holder and detach it. 9. Detach the drain hose from the drain pump and remove the drain pump.
12.3. Detaching the control board
1. Open the air inlet section of the front grille. 2. Unscrew the 4 screws on the front grille, then disengage the catches with a screwdriver and detach the front grille.
3. Loosen the screw on the cover and detach the cover. 4. Unscrew the 2 screws on the control section cover and detach all connectors.
5. Disengage the catch on the control board and remove it.
12.4. Detaching the louver motor
3. Loosen the screw on the cover and detach the cover. 4. Unscrew the 2 screws on the control section cover and detach the connector for the louver motor. 5. Unscrew the screw and disengage the 2 catches on the air outlet grille.
6. Unscrew the 2 screws on the louver motor on the back of the air outlet grille and remove the louver motor.

13 Technical Data

13.1. Operation Characteristics (CU-3E18LBE)
13.1.1. One Indoor Unit Operation
13.2. Operation Characteristics (CU-4E23LBE)
13.2.1. One Indoor Unit Operation
13.3. Operation Characteristics (CU-4E27CBPG)
13.3.1. One Indoor Unit Operation
14 Exploded View and Replacement Parts List

14.1. Exploded View

Note The above exploded view is for the purpose of parts disassembly and replacement. The non-numbered parts are not kept as standard service parts.
14.2. Replacement Parts List

REF. NO. 62 FLOAT SWITCH THERMAL FUSE TERMINAL BOARD COMPLETE SENSOR COMPLETE TERMINAL PLATE FOR EARTH LEAD WIRE COMPLETE (AS) PC BOARD (MAIN) PC BOARD (RECEIVER) REMOTE CONTROL AIR SWING MOTOR FAN MOTOR EVAPORATOR DRAIN PUMP DRAIN CAP CHASSIS COMPLETE FAN MOTOR BRACKET PARTICULAR PLATE PARTICULAR PIECE-1 PARTICULAR PIECE-2 PARTICULAR PIECE-3 DRAIN PUMP BRACKET DISCHARGE GRILE COMPLETE LOUVER VERTICAL LOUVER DECORATION PANEL INSULATION SHEET CROSS-FLOW FAN COMPLETE CONTROL BOARD BOX CONTROL COVER-1 CONTROL COVER-2 CONTROL COVER-3 HOLDER SENSOR DRAIN TRAY BELT GUTTER BUSHING FOR DRAIN PUMP-1 BUSHING FOR DRAIN PUMP-2 BUSHING CAP (1/4) CAP (3/8) CAP FLUCRUM DRAIN PIPE DRAIN HOSE COMPLETE TUBE ASSY (3/8) TUBE ASSY (1/4) FLARE NUT (1/4) FLARE NUT (3/8) JOINT FOR DRAIN PIPE PART NAME & DESCRIPTION QTY. 1 CS-ME7KB1E CWA121207 CWA16C1047 CWA28K1045J CWA50C2100 CWA64C1005 CWA67C5811 CWA73C4647 CWA744084 CWA75C2610X CWA98169J ARW50A8P30AC CWB302119 CWB532010J CWB82018 CWD50C260 CWD54232 CWD66238 CWD76223 CWD76225 CWD91197 CWD93938 CWE20C2490 CWE24423 CWE24C101 CWE35K1007 CWG10468 CWH02K117X CWH10931 CWH131172 CWH13424 CWH13426 CWH32137 CWH40C1022 CWH4605004 CWH481002X CWH50196 CWH50197 CWH50198J CWH52061 CWH52062 CWH52160 CWH64C017 CWH851109 CWH85C1031 CWT022528 CWT024003 CWT251026 CWT251027 CWT29116 O O O O O O REMARKS O O O O
REF. NO. ZNR FUSE (250V 3A)
PART NAME & DESCRIPTION

QTY. 1

CS-ME7KB1E ERZVEAV511 XBA2C31TR0 CWF567435 CWF567436 CWF613731 CWF613732 CWF613733

REMARKS

OPERATING INSTRUCTIONS OPERATING INSTRUCTIONS INSTALLATION INSTRUCTIONS INSTALLATION INSTRUCTIONS INSTALLATION INSTRUCTIONS
(NOTE) Other parts except the operation manual and the installation manual are parts for RoHS. "l" marked parts are recommended to be kept in stock. All parts are supplied from ACD, JAPAN (VENDER CODE : 00025800).

Printed in Japan