Order No: PHA-AG0801001C2
Indoor Unit CS-RE9HKE CS-RE12HKE
Outdoor Unit CU-RE9HKE CU-RE12HKE

WARNING

This service information is designed for experienced repair technicians only and is not designed for use by the general public. It does not contain warnings or cautions to advise non-technical individuals of potential dangers in attempting to service a product. Products powered by electricity should be serviced or repaired only by experienced professional technicians. Any attempt to service or repair the products dealt with in this service information by anyone else could result in serious injury or death.

TABLE OF CONTENTS

1. Safety Precautions..3 2. Specification..5 2.1 2.2 CS-RE9HKE CU-RE9HKE..5 CS-RE12HKE CU-RE12HKE..7 10. Installation Instruction..19 10.1 10.2 10.3 Select the Best Location..19 Indoor Unit..20 Outdoor Unit..22
11. Service Mode..25 11.1 Auto OFF/ON Button..25 11.2 Select Remote Control Transmission Code25 11.3 Operate and Display of Remote Control.26 12. Operation Control..28 12.1 12.2 12.3 12.4 Basic Function..28 Indoor Fan Motor Operation..29 Outdoor Fan Motor Operation..29 Airflow Direction...30
3. Features..9 4. Location of Controls and Components.10 4.1 4.2 4.3 Indoor Unit..10 Outdoor Unit..10 Remote Control..10
5. Dimensions..11 5.1 5.2 Indoor Unit..11 Outdoor Unit..12
6. Refrigeration Cycle Diagram..13 7. Block Diagram..14 8. Wiring Connection Diagram..15 9. Printed Circuit Board..16
13. Protection control..32 13.1 13.2 13.3 Protection Control For All Operations.32 Protection Control For Cooling and Soft Dry Operation..33 Outdoor Air Temperature Control..34
2008 Panasonic Home Appliances Air-Conditioning (Guangzhou) Co.,Ltd (PHAAG). All rights reserved. Unauthorized copying and distribution is a violation of law.
14. Troubleshooting Guide.36 14.1 About Self Diagnosis..36 14.1 Display of Error Code.36 15. Disassembly and Assembly Instructions.39 16. Exploded View and Replacement Pars List.42 16.1 16.2 Indoor Unit..42 Outdoor Unit..44

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 WARNING

CAUTION

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 PROHIBITED 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. 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. 2. Carry out drainage piping as mentioned in installation instructions. If drainage is not perfect, water may enter the room and damage the furniture. 3. Tighten the flare nut with torque wrench according to specified method. If the flare nut is over-tightened, after a long period, the flare may break and cause refrigerant gas leakage. 4. Do not touch outdoor unit air inlet and aluminums fin. It may cause injury. 5. Select an installation location which is easy for maintenance. 6. 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 should be in easily accessible place for power disconnection in case of emergency. In some countries, permanent connection of this air conditioner to the power supply is prohibited. 1) Power supply connection to the receptacle using a power plug. Use an approved 15/16A power plug with earth pin for the connection to the receptacle. 2) Power supply connection to a circuit breaker for the permanent connection. Use an approved 16A circuit breaker for the permanent connection. It must be a double pole switch with a minimum 3.5 mm contact gap. 7. Do not release refrigerant. Do not release refrigerant during piping work for installation, re-installation and during repairing a refrigeration parts. Take care of the liquid refrigerant, it may cause frostbite. 8. Installation work. It may need two people to carry out the installation work. 9. Do not install this appliance in a laundry room or other location where water may drip from the ceiling, etc.

2. Specification

COOLING HEATING

CS-RE9HKE CU-RE9HKE

Item Unit kW BTU/h W/W BTU/hW dB(A) Power level dB kW BTU/h W/W BTU/hW dB(A) Power level dB l/h (pt/h) m3/m (ft3/m) m3/m (ft3/m) m3/m (ft3/m) cm3 kg (oz) mm (inch) mm (inch) mm (inch) kg (lbs) mm (inch) mm (inch) m (ft) m (ft) g/m (oz/ft) m (ft) mm mm Outdoor Unit 2.60(0.90~3.00) 8870(3070~1023) 3.56(4.74~3.00) 12.15(16.16~10.23) Hi: 42 Lo: 27 QLo: 25 Hi: 60 3.30(0.90~4.10) 11250(3070~13980) 4.02(5.29~3.57) 13.72(18.06~12.16) Hi: 42 Lo: 27 QLo: 26 Hi: 60 1.5 2.6 9.00(250) 9.13(322) 11.6 (409) 28.9 (1020) Capillary Tube RB68A or Freol Alpha68M 0.78 (27.5) 280 (11-1/32) 540 (21-1/4) 799 (31-15/32) 780 (30-23/32) 183 (7-13/64) 289 (11-3/8) 8.5 (19) 28 (62) 9.52 (3/8) 6.35 (1/4) 3 (9.8) - 15(49.2) 5 (16.4) 20 (0.2) 7.5 (24.6) Rotary Induction (6-poles) 750 Cross-Flow Fan Propeller Fan AS PP Induction (8-poles) Induction (6-poles) Aluminium (Pre Coated) Aluminum ( Pre Coated) Slit Fin Slit Fin 2 x 15 x x 24 x x 315 x 25.x 504 x 18.2 P.P.HONEY COMB One-Touch Indoor Unit

Outdoor Unit

Remote Control

Transmitter
OFF/ON Operation mode Fan speed selection Airflow direction adjustment

Temperature setting

Timer setting
For normal operation, the ERROR RESET button is not in use. Press RESET button to restore the remote controls default setting.

5. Dimensions

5.1 Indoor Unit

Unit: mm

6. Refrigeration Cycle Diagram

7. Block Diagram

8. Wiring Diagram
CS/CU-RE9 HKE CS/CU-RE12 HKE

CN-GMD (Y)

CN-DISP (W)

CN-STM (W)

WIRELESS REMOTE CONTROL
ELECTRONIC CONTROLLER (DISPLAY,RECEIVER)

AUTO SW

SENSOR (AIR TEMPERATURE.)
ELECTRONIC CONTROLLER (MAIN)

FUSE T 3.15A L 250V

CN-TH (Y)

SENSOR (PIPING TEMP.)

PO WER SUPPLY CORD

AC4 RY-PWR ZNR

AC1 AC2 AC3

BL W B Y

CN-FM (W)

INDOOR UNIT

1L2N 3

TERMINAL TERMINAL

OUTDOOR UNIT

FAN MOTOR

CABINET
CABINET CONNECTOR BLUE FM1 FM2 Fm3 BROWN AC-L (BROWN) FUSE T20A L250V BLACK DATA ( BLACK)

FG2 FGI

AC-N (BLUE)

RY-PWR PTC2

FUSE2 T3.14A L250V

Resistance (k)

COMPRESSOR

REACTO R

Y Y R B B R

Temperature ()

Remark: :Pipe Temp. Sensor :Outdoor air sensor : Discharge Temp.Sensor

YELLOW

COMPRESSOR TERMINAL

BLUE TRADE MARK

9. Printed Circuit Board

Indoor Unit

Main Printed Circuit Board

TOP VIEW

BOTTOM VIEW

Indicator

10. Installation Instruction
10.1 Select the Best Location

10.1.1

11.1.3 Indoor/Outdoor Unit
There should not be any heat source or steam near the unit. There should not be any obstacles blocking the air circulation. A place where air circulation in the room is good. A place where drainage can be easily done. A place where noise prevention is taken into consideration. Do not install the unit near the door way. Ensure the spaces indicated by arrows from the wall, ceiling, fence or other obstacles. Recommended installation height for indoor unit shall be at least 2.5m.

10.1.2

If an awning is built over the unit to prevent direct sunlight or rain, be careful that heat radiation from the condenser is not obstructed. There should not be any animal or plant which could be affected by hot air discharged. Keep the spaces indicated by arrows from wall, ceiling, fence or other obstacles. Do not place any obstacles which may cause a short circuit of the discharged air. If piping length is over the rated length, additional refrigerant should be added as shown in the table below:

Additional Refrigerant (g/m) 20 20
Piping size Rated Max Min Piping Max Gas Liquid Length Elevation Length (m) Piping (m) (m) Length (m) RE9HKE 3/8 1/4" 7.RE12HKE 3/8 1/4 7.3 15
Example: If the unit is installed at a 10m distance, the quantity of additional refrigerant should be 50 g. (10-7.5) m x 20g/m = 50 g

10.2 Indoor Unit

10.2.1 How to Fix Installation Plate
The mounting wall is strong and solid enough to prevent if from the vibration. The centre of installation plate should be at more than 450 mm at right and left of the wall. The distance from installation plate edge to ceiling should more than 75mm. From installation plate left edge to units left side is 98mm. From installation plate right edge to units right side is 112mm. B : For left side piping, piping connection for gas should be about 45mm from this line. : For left side piping, piping connection cable should be about 800mm from this line. 1 Mount the installation plate on the wall with 5 screws or more. (If mounting the unit on the wall, consider using anchor bolts.) Always mount the installation plate horizontally by aligning the marking-off line with the thread and using a level gauge. 2 Drill the piping plate hole with 70mm hole-core drill. 2.1 Line according to the left and right side edge of the installation plate. The meeting point of the extended line is the centre of the hole. Another method is by putting measuring tape at position as shown in the diagram above. The hole centre is obtained by measuring the distance namely 150mm and 125mm for left and right hole respectively. 2.2 Drill the piping plate hole at either the right or left and the hole should be slightly slanted to the outdoor side.
Installation plate mm 150 mm Wall More than 450 mm Screw 2 More than 450 mm Wall
Measuring tape 125 mm 219 mm
10.2.2 To Drill a Hole in the Wall and Install a Sleeve of Piping
3 Insert the piping sleeve to the hole. Fix the busing to the sleeve. Cut the sleeve until it extrudes about 15mm from the wall Caution When the wall is hollow, please be sure to use the sleeve for tube assy to prevent dangers caused by mice biting the connecting cable. 4 Finish by sealing the sleeve with putty or caulking compound at the final stage.

70 through hole Wall Indoor Outdoor
15 mm Sleeve for tube assy Approx. 5 - 7 mm

Bushing for tube assy

Putty or caulking compound

10.2.3

Indoor Unit Installation

10.2.4

Connect the Cable to the Indoor Unit
The inside and outside connecting cable can be connected without removing the front grille. Connecting cable between indoor unit and outdoor unit shall be approved polychloroprene sheathed 4x 1.5mm2 flexible cord, type designation 245 IEC 57 or heavier cord. Ensure the color of wires of outdoor unit and the terminal numbers are the same to the indoors respectively. Earth lead wire shall be longer than the other lead wires as shown in the figure for the electrical safety in case of the slipping out of the cord from the anchorage.
Secure the cable onto the board with the holder (clamper).

10.3 Outdoor Unit

10.3.1

Install the Outdoor Unit

After selecting the best location, start installation according to indoor/outdoor unit installation diagram. 1 Fix the unit on concrete or rigid frame firmly and horizontally by bolt nut (10mm). A B 2 When installing at roof, please consider strong wind and earthquake. Please fasten the installation stand firmly with bolt or nails. A 570 B 104 C 20 D 320
10.3.2 Connecting the Piping 10.3.2.1 Connecting the piping to indoor unit
Please make flare after inserting flare nut (locate at joint portion, of tube assembly) onto the copper pipe. (In case of using long piping) Connect the piping Align the center of piping and sufficiently tighten the flare nut with fingers. Further tighten the flare nut with torque wrench in specified torque as stated in the table. Piping size (Torque) Gas Liquid 3/8 (42Nm) 1/4" (18Nm) 1/2" (55Nm) 1/4" (18Nm) Do not over tighten, over tightening cause gas leakage

Spanner or Wrench

Torque wrench
Connecting the piping to outdoor unit Decide piping length and then cut by using pipe cutter. Remove burrs from cut edge. Make flare after inserting the flare nut (locate at valve) onto the copper pipe. Align center of piping to valves and then tighten with torque wrench to the specified torque as stated in the table.

10.3.2.2

Cutting and flaring the piping
Please cut using pipe cutter and then remove the burrs. Remove the burrs by using reamer. If burrs are not removed, gas leakage may be caused. Turn the piping end down to avoid the metal powder entering the pipe. Please make flare after inserting the flare nut onto the copper pipes.

Improper flaring

P ip e R ea m e r B ar H a n d le Yo k e C o re B ar 0 0.5 m m
I n c l in e d S u r f a c e C ra c k e d U n e v e n dam aged t h ic k n e s s

P o in t d o w n

C la m p h a n d le

R e d a r ro w m a r k

C o p p e r p ip e

1. To cut

2. To remove burrs

3. To flare

When properly flared, the internal surface of the flare will evenly shine and be of even thickness. Since the flare part comes into contact with the connections, carefully check the flare finish.

10.3.3

Evacuation of the equipment
When installing an air conditioner, be sure to evacuate the air inside the indoor unit and pipes in the follwing procidure.
Outdoor Unit Control board cover

Terminal board

To indoor unit Liquid side Gas side 2-way valve (Open) Cap 3-way valve (Open) Hexagonal wrench Service port cap
Connect a charging hose with a push pin to the low side of a charging set and the service port at the 3-way valve. Be sure to connect the end of charging hose with the push pin to the service port. The size of charging hose fitting should be 1/2 UNF, 20 threads. Connect the center hose o the charging set to a vacuum pump with check valve, or vacuum pump and vacuum pump adaptor. Turn on the power switch of the vacuum pump and make sure that the needle in the gauge moves from 0 cmHg (0 Mpa) to 76 cmHg (-0.1 Mpa). Then evacuate the air approximately ten minutes. Close the Low side valve of the charging set and turn off the vacuum pump.Make sure that the needle in the gauge does not move after approximately five minutes. Note: BE SURE TO FOLLOW THIS PROCEDURE IN ORDER TO AVOID REFRIGEANT GAS LEAKAG Disconnect the charging horse from the vacuum pump and from the service port of the 3-way valve. Tighten the service port caps of the 3-way valve at a torque of 18 N.m with a torque wrench. Remove the valve caps of both of the 2-way valve and 3-way valve. Position both of the valves to OPEN using a hexagonal wrench (4mm). Mount valve caps onto the 2-way and the 3-way valve. Be sure to check for gas leakage.

CAUTION:

Over 5mm

10.3.4

Connect the cable to the Outdoor Unit
Remove the control board cover from the unit by loosening the screw. Connecting cable between indoor unit and outdoor unit shall be approved polychloroprene sheathed 4x 1.5mm2 flexible cord, type designation 245 IEC 57 or heavier cord.

Remote control A(STANDARD) B C D J02 SHORT OPEN SHORT OPEN J03 OPEN OPEN SHORT SHORT
11.3 Operate and Display of Remote Control

11.3.1 Original setting

11.3.2

Mode selecting button

AUTO, HEAT, COOL, DRY can be selected by pressing MODE button. Initial display of LCD is as follow
*Keeping the button depressed continuously, the operation mode will change in the following order in turn AUTOHEATCOOLDRY--AUTO
11.3.3 Temperature adjusting button
Temperature adjusting range is between 16~30

11.3.4 Fan speed button

There are 5 speed levels can be selected. The display on the remote controller changes as follows by pressing the AIR SWING button.

11.3.5

AIR SWING button
To adjust vertical airflow directions by pressing AIR SWING button (5 options)

11.3.6

QUIET/POWERFULL button
Press this button to switch among QUIET operation, POWERFUL operation and normal operation. Start Quiet operation: Press this button until QUIET displaying on remote control display and indoor QUIET indicator will light up to identify Quiet mode operating. Start POWERFUL operation: Press this button until POWERUL displays on remote control display and indoor POWERFUL indicator will light up to identify Quiet mode operating. Switch Quiet /Powerful operation to normal operation: Press this button until QUIET and POWERFUL on remote control display disappear. Indoor units QUIET and POWERFUL indicators will go out to identify the unit returns to normal operation. Note: QUIET and POWERFUL operation can not be active simultaneously. 26
11.3.7 Timer setting button
There are 4 types of timer setting by pressing Timer setting button: ON-TIMER, OFF-TIMER, ON-OFF TIMER, OFFON TIMER.
1) SELECT button When the air conditioner is ON, OFF-TIMER or OFF-ON TIMER can be selected by pressing SELECT button.
When the air conditioner is turned off, ON-TIMER or ON-OFF-TIMER can be selected.

2) Button A and B

Pressing button A can change the time for ON-TIMER and OFF-TIMER, off time for OFF-ON Timer, on time for ON-OFF TIMER; Pressing button B can change the on time for OFF-ONTimer and off time for ON-OFF Timer setting.

3) SET/CANCEL button.

Pressing the button to set or cancel the set timer during the timer setting or activate the previous timer setting. After the timer setting is determined, ON or OFF will stop flashing. If the timer setting is cancelled, ON or OFF will disappear on the remote control display. NOTE: OFF Timer and OFF- ON Timer can only be set during the operation; Timer setting can operate only once. If the OFF/ON button on the remote control or the AUTO Switch on the indoor unit is pressed, the timer setting Will be cancelled. If Auto Restart Control occurs, timer setting will be cancelled.

During the operation, if the ON Timer or ON-OFF Timer is set, the operation will be stopped.

11.3.8

About Cursor Key Which Points To OFF On Remote Control
When the ON/OFF button on the remote control is pressed, the cursor key which points to OFF will appear or Disappear to indicate the ON/OFF status of the air conditioner.
For some reason (Ex. The signal of the remote control does not reach the signal receiver of the indoor unit.), the display of the remote control will not correspond with the actual ON/OFF status of the indoor unit: 1. The air conditioner is running but the cursor key which points to OFF appears. The air conditioner can be stopped with any button (Except for ON/OFF, TIMER SET, TIMER ON) pressed. The air conditioner is on standby, but the cursor key which points to OFF disappears. The air conditioner can be started with any button (Except for ON/OFF, TIMER SET, TIMER OFF) pressed.

12. Operation Control

12.1 Basic Function
12.1.1 Internal Setting Temperature
Once the operation starts, remote control setting temperature will be taken as base value for temperature shifting processes. These shifting processes are depending on the air conditioner settings and the operation environment. The final shifted value will be used as internal setting temperature and it is updated continuously whenever the electrical power is supplied to the unit.
Remote Control Setting Temp. (16~30 Indoor Air Temperature Shifting Internal Setting Temperature Outdoor Air Temperature Shifting Powerful Temperature Limit Checking ( Min:16 ; Internal Setting Temperature
12.1.2 Cooling Operation 12.1.2.1 Thermostat control
Compressor is OFF when Intake Air Temperature - Internal Setting Temperature < -1.5 Compressor is ON after waiting for 3 minutes, if the Intake Air Temperature - Internal Setting Temperature > Compressor OFF point.
12.1.3 12.1.3.1 12.1.4 12.1.4.1
Soft Dry Operation Thermostat control (The same as Cooling mode) Heating operation Thermostat control
Compressor is OFF when Intake Air Temperature - Internal Setting Temperature > +2.0 Compressor is ON after waiting for 3 minutes, if the Intake Air Temperature - Internal Setting Temperature< Compressor OFF point.
12.1.5 Automatic Operation
1. Once AUTO mode is selected, operation mode is determined by set temperature of remote control, indoor intake temperature and outdoor temperature. 2.During operating mode judgment, indoor fan runs at minLo- fan speed and outdoor fan runs in the purpose of detecting the intake air temperature and outdoor air temperature (for 30 seconds)
12.2 Indoor Fan Motor Operation
Basic Rotation Speed i. Manual Fan speed Fan motors number of rotation is determined according to remote control setting. Model CS-RE9HKE

CS-RE12HKE

Remote control Tab COOLING(rpm) HEATING(rpm) COOLING(rpm) HEATING(rpm)

O Hi 1370 1440

O Me+ 1270 1340

O Me 1160 1260

O Me1050 1180

O Lo 940 1100

ii. Auto Fan Speed (Cooling, Soft Dry Mode) According to room temperature and setting temperature, indoor fan speed is determined automatically. The indoor fan will operate according to pattern below.
Fan speed Higher Medium Lower A b c d e f g h a b
B. Feedback control Immediately after the fan motor started, feedback control is performed once every second. During fan motor on, if fan motor feedback 2550 rpm or < 50 rpm continue for 10 seconds, then fan motor error counter increases, fan motor then stops and restarts. If the fan motor counter becomes 7 times, then H19 - fan motor error is detected. Operation stops and cannot on back.
12.3 Outdoor Fan Motor Operation
Outdoor fan motor is operated with one fan speed only. It starts when compressor starts operation and it stops 30 seconds after compressor stops operation.

ON Compressor OFF ON OFF

Outdoor Fan

Airflow Direction

12.3.1

Vertical Airflow

Operating Mode
Cooling Auto Normal Powerful

31o 10o ~50o

35o(Begining of POWERFUL mode) , 6o 10o 22o 31o 12

Soft dry

Normal Powerful
12o 8o 24o 37o 8o, 9o, 39o , 41o , 8 , 9 , 35 , 39 ,

o o o o

Heating
1. Automatic vertical airflow direction can be set using remote control; the vane swings up and down within the angles as stated
above. For heating mode operation, the angle of the vane depends on the indoor heat exchanger temperature. When the air conditioner is stopped using remote control, the vane will shift to close position. 2. Manual vertical airflow direction can be set using remote control. The angels of the vane are as stated above. When the air conditioner is stopped using remote control, the vane will shift to close position.

12.3.2 12.3.3

Horizontal Airflow Quiet operation
The horizontal airflow direction louvers can be adjusted manually by hand.
To provide quiet operation comparing to normal operation. The Quiet operation can be active or stop by pressing QUIET/POWERFUL buttons at remote control. Once Quiet mode is active ,the unit will continuously operate in QUIET Mode until cancel the mode by pressing QUIET/POWERFUL buttons at remote control.
12.3.4 Powerful operation
To cooling or heating the room faster comparing to normal operation. The POWERFUL operation can be active or stop by pressing QUIET/POWERFUL buttons at remote control. When powerful operation is active, the unit will continuously operate in POWERFUL mode until cancel the mode by pressing QUIET/POWERFUL buttons at remote control. Operation details are as the fig. below. 1. For cooling, soft Dry mode

Power Button pressed

Fast Cooling

PIPING TEMP. (COOLING)

Cooling, Soft Dry

D C B A

1130 (Max)

45 seconds

FAN SPEED ( rpm)

730 (Min.)

-0.25 -1.67 -1.00

Correction Factor()

ON OFF 2. For Heating mode:

Fast Heating1 Heating

D C B A Shi

1270 (Max)

940 (Min.)

+1.00 +2 +0.25

ON OFF Note: The value of A, B, C, D will change according to the indoor temperature.

12.3.5

Automative Restart Control
When the power supply is cut off during the operation of air conditioner, the compressor will re-operate within three to four minutes after power supply resumes.

12.3.6

Indication Panel
POWER Green Operation ON Operation OFF TIMER Orange Timer setting ON Timer setting OFF POWERFUL Red Powerful Mode ON Powerful Mode OFF QUIET Green Quiet mode ON Quiet mode OFF
LED Color Light ON Light OFF
Note: If POWER LED blinks, the possible operation of the unit is operation mode judgment, or ON timer sampling. If Timer LED blinks, there is an abnormal operation occurs.

12.3.7

Timer control
Delay ON Timer ca be set using remote controller, the unit with timer set will start operate earlier than the setting time. This is to provide a comfortable environment when reaching the set On time. Seventy minutes before the set time for ON Timer or ON-OFF Timer setting, indoor ( at fan speed of Lo-) and outdoor fan motor start operate for 30 seconds to determine the indoor intake air temperature and outdoor air temperature in order to judge the operation mode. From the above judgment, the decided operation will start operate earlier than the set time as shown below.
Timer Signal Receiving sound During Operation.
Timer Signal Receiving Sound When the Air Conditioner Stops.

13. Protection control

13.1 Protection Control For All Operations
13.1.1 Time Delay Safety Control
The Compressor will not turn on within 3 minutes from the moment operation stops, although the unit is turned on again by pressing OFF/ON button at remote control within this period. This control is not applicable if the power supply is cut off and on again. This phenomenon is to balance the pressure inside the refrigerant cycle.
13.1.Seconds Forced Control
Once the air conditioner is turned on, the compressor will not stop within 30 seconds in a normal operation although the intake air temperature has reached the thermo-off temperature. However, force stop by pressing the OFF/ON button at the remote control is permitted or the Auto OFF/ON button at indoor unit. The reason for the compressor to force operation for minimum 30 seconds is to allow the refrigerant oil run in a full cycle and return back to the outdoor unit.

13.1.3

Total running current control
1. If the outdoor unit total running current is detected exceeding I1(A), the frequency instructed for compressor operation will be decreased. 2. If the running current does not exceed I1(A) for 5 seconds, the frequency instructed will be increased. RE9HKE RE12HKE Operation mode I1(A) I1(A) Cooling/ Soft Dry /Fan A* 5.8 7.4 Cooling/ Soft Dry /Fan B 5.6 7.3 Heating 7.01 8.05 *The first 30 minutes of cooling operation, A will be applied.

13.1.4

IPM (Power transistor) Protection Control.
1. DC Peak Current Control When electric current to IPM exceeds set value of DC17.3 1A, the compressor will stop. It will restart after three minutes. If the set value is exceeded again within 30 seconds, the operation will restart after one minute. If this condition repeats continuously for seven times, all indoor and outdoor relays will be cut off. Error code [F99] will be displayed. 2. Overheating protection control When the IPM temperature rises to 90.0 , compressor will stop immediately. Compressor restarts after three minutes if the temperature decreases to 85

13.1.5

Compressor Overheating Prevention Control
Instructed frequency for compressor operation will be regulated compressor discharge temperature. The change of frequency is as below.
13.1.6 Low pressure Prevention control (Gas Leakage Detection)
1. When the conditions listed in the table occur, the compressor stops and restarts after three minutes. 2. If this continuously occurs for twice within 20 minutes, all indoor and outdoor relays will be cut off. 3. This control is not applicable for deice operation.

RE9HKE

RE12HK
13.1.7 Low Operation Frequency Protection Control
If one of the following conditions exists, the compressor will run with the frequency of 40 Hz

13.1.8

Compressor Tank Temperature Rise Protection Control
a. Control start conditions For 5 minutes, the compressor continuously operates and outdoor total current is between 0.65A and 1.65A. During Cooling and Soft Dry operations: Indoor suction temperature - indoor piping temperature is below 4. Indoor temperature and outdoor temperature is 305. Remote Control setting 16 and Hi Fan Speed. During Heating operations: Indoor piping temperature - indoor suction is under 5. Indoor temperature and outdoor temperature is 20 2. Remote control setting 30 and Hi Fan Speed. b. Control contents Compressor stops (and restart after 3 minutes) If the conditions above happen 2 times within 20 minutes, the unit will: - Stop operation - Timer LED blinks and F91 indicated

13.2 Protection Control For Cooling and Soft Dry Operation
13.2.1 Outdoor Air Temperature Control
The compressor operating frequency is regulated in accordance to the outdoor air temperature as shown in the diagram below. This control will begin 1 minute after the compressor starts. Compressor frequency will adjust base on outdoor air temperature.

13.2.2

Freeze Prevention Control
1.Frequency of the compressor For prevention of freezing of the indoor evaporator, the frequency of the compressor will be changed according to the indoor piping temperature.
2.Indoor Fan Control Indoor fan speed changes according to the indoor fan speed.
13.2.3 Dew Prevention Control
To prevent dew formation at indoor unit discharge area. This control starts if all conditions continue for 20 minutes: - Operated with Cooling or Soft Dry Mode. - Indoor intake temperature is between 255 and 295. - Outdoor air temperature is less than 305. - Quiet Lo fan speed. This control stopped then receive air swing change signal from Remote Control.

13.2.4

Overload Protection For Cooling Operation
The frequency for the compressor will change according to the outdoor piping temperature.
13.3 Outdoor Air Temperature Control
13.3.1 Indoor Fan Control
1. Indoor fan is controlled by the indoor piping temperature. Manual Fan Speed Piping Temperature()

Auto Fan Speed

2. During heating operation, the indoor fan will run at the following speed when the compressor stops.
3. Hot Start When the heating operation starts, the indoor fan stops and the compressor run with the frequency of 117Hz. This is to prevent the cold airflow from blowing. If the piping temperature rises to 19 , and the indoor fan speed and airflow direction varies with the indoor piping temperature, the hot start control is completed.

13.3.2

Overload Protection Control
The frequency for the compressor is determined by indoor piping temperature.

13.3.3

Outdoor Air Temp Control
One minute after the start-up of the compressor, outdoor air temperature control starts.
14. Troubleshooting Guide
14.1 Refrigeration cycle system
In order to diagnose malfunctions, make sure that there are no electrical problems before inspecting the refrigeration cycle. Such problems include insufficient insulation, problem with the power source, malfunction of a compressor and a fan. The normal outlet air temperature and pressure of the refrigeration cycle depends on various conditions, the standard values for them are shown in the table on the right.
Normal Pressure and Outlet Air Temperature (Standard) Outlet air Gas Pressure Temperature Mpa 2 (C) (kg/cm G) Cooling Mode 0.9~1.2 ( 9~12) 12~16 Heating Mode 2.3 ~2.9 (23~29) 36~45 Condition: Indoor fan speed = High Outdoor temperature = 35C at cooling mode and 7C at heating mode. Compressor operates at rated frequency

(Note) All parts are supplied from PHAAG, China. Printed in China