Panasonic CS-MZ5SKE Service Manual Download Page 93

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13.4.20 F11 (4-way Valve Switching Failure)

Malfunction Decision Conditions



When indoor heat exchanger is cold during heating (except deice) or when indoor heat exchanger is hot during

cooling and compressor operating, the 4-way valve is detected as malfunction.

Malfunction Caused



Indoor heat exchanger (pipe) thermistor



4-way valve malfunction

Troubleshooting

* Check gas side pipe – for hot gas flow in cooling mode

Summary of Contents for CS-MZ5SKE

Page 1: ...d frostbite be assured of no refrigerant leakage during the installation or repairing of refrigerant circuit 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...

Page 2: ...nt connecting methods Any mismatch connections will result in malfunctions The following illustration demonstrates the correct electrical works for both type A Single Connection B Multiple Connection Colour of wires connection cable Terminals on the indoor unit Terminals on the outdoor unit Power supply cord Terminals on the isolating devices Disconnecting means 1 2 3 2 3 L 1 N S1 Connection for m...

Page 3: ...sic Function 48 10 2 Indoor Fan Motor Operation 49 10 3 Airflow Direction 51 10 4 Quiet Operation Cooling Mode Cooling Area of Dry Mode 53 10 5 Quiet Operation Heating 53 10 6 Powerful Mode Operation 53 10 7 Timer Control 54 10 8 Sleep Mode Operation 54 10 9 Auto Restart Control 54 10 10 Indication Panel 55 10 11 nanoe Operation 55 10 12 ECONAVI Operation 57 11 Operation Control For Multi Split Co...

Page 4: ...x into refrigeration cycle piping Mixing of air etc will cause abnormal high pressure in refrigeration cycle and result in explosion injury etc 8 Do not add or replace refrigerant other than specified type It may cause product damage burst and injury etc 9 For R410A model use piping flare nut and tools which is specified for R410A refrigerant Using of existing R22 piping flare nut and tools may ca...

Page 5: ...igerant gas leakage during operation It may cause toxic gas when the refrigerant contacts with fire 23 This equipment must be properly earthed Earth line must not be connected to gas pipe water pipe earth of lightning rod and telephone Otherwise it may cause electrical shock in case of equipment breakdown or insulation breakdown CAUTION 1 Do not install the unit at place where leakage of flammable...

Page 6: ...e H L QLo dB A 39 27 21 39 27 21 Power Level dB 55 55 Indoor Fan Type Cross Flow Fan Cross Flow Fan Material ASG20K1 ASG20K1 Motor Type DC Transistor 8 poles DC Transistor 8 poles Input Power W 44 9 44 9 Output Power W 40 40 Speed QLo Cool rpm 610 600 Heat rpm 610 610 Lo Cool rpm 700 700 Heat rpm 800 800 Me Cool rpm 865 865 Heat rpm 955 955 Hi Cool rpm 1030 1030 Heat rpm 1110 1110 SHi Cool rpm 106...

Page 7: ... 16 11 Heating Maximum C 30 30 Minimum C 16 16 1 Cooling capacities are based on indoor temperature of 27 C Dry Bulb 80 6 F Dry Bulb 19 0 C Wet Bulb 66 2 F Wet Bulb and outdoor air temperature of 35 C DRY BULB 95 F Dry Bulb 24 C Wet Bulb 75 2 F Wet Bulb 2 Heating capacities are based on indoor temperature of 20 C Dry Bulb 68 F Dry Bulb and outdoor air temperature of 7 C Dry Bulb 44 6 F Dry Bulb 6 ...

Page 8: ...ength for maximum chargeless length m 20 20 20 30 Additional gas amount over chargeless length g m 15 15 15 20 Note Available Remarks for CU 2E12SBE CU 2E15SBE CU 2E18SBE 1 At least two indoor units must be connected 2 The total nominal cooling capacity of indoor unit that will be connected to outdoor unit must be within connectable capacity range of indoor unit as shown in the table above Example...

Page 9: ... CS E18SKEW M Capacity range of connectable units From 4 8kW to 11 0kW From 4 8kW to 13 6kW From 4 8kW to 17 5kW Pipe length 1 room maximum pipe length m 25 25 25 Allowable elevation m 15 15 15 Total allowable pipe length m 70 70 80 Total pipe length for maximum chargeless length m 40 45 45 Additional gas amount over chargeless length g m 20 20 20 Note Available Remarks for CU 4E23PBE CU 4E27PBE C...

Page 10: ...1 6 2 0 3 6 2 0 2 0 1 6 2 5 4 1 2 5 2 5 1 6 2 8 4 4 2 8 2 8 1 6 3 2 4 8 3 2 3 2 2 0 2 0 4 0 2 0 2 5 4 5 2 0 2 8 4 8 2 0 3 2 5 2 2 5 2 5 5 0 2 5 2 8 5 3 Indoor Unit CS MZ5SKE CS MZ5SKE M Outdoor Unit CU 2E18SBE 2Room 1Room Indoor Unit Capacity kW Total Indoor Capacity kW Indoor Unit Capacity kW Total Indoor Capacity kW 1 6 1 6 3 2 1 6 1 6 1 6 2 0 3 6 2 0 2 0 1 6 2 5 4 1 2 5 2 5 1 6 2 8 4 4 2 8 2 8 ...

Page 11: ...0 7 5 1 6 2 5 2 5 6 6 2 8 2 8 5 6 1 6 2 5 2 8 6 9 2 8 3 2 6 0 1 6 2 5 3 2 7 3 2 8 4 0 6 8 1 6 2 5 4 0 8 1 2 8 5 0 7 8 1 6 2 8 2 8 7 2 3 2 3 2 6 4 1 6 2 8 3 2 7 6 3 2 4 0 7 2 1 6 2 8 4 0 8 4 3 2 5 0 8 2 1 6 3 2 3 2 8 0 4 0 4 0 8 0 1 6 3 2 4 0 8 8 4 0 5 0 9 0 2 0 2 0 2 0 6 0 2 0 2 0 2 5 6 5 2 0 2 0 2 8 6 8 2 0 2 0 3 2 7 2 2 0 2 0 4 0 8 0 2 0 2 0 5 0 9 0 2 0 2 5 2 5 7 0 2 0 2 5 2 8 7 3 2 0 2 5 3 2 7 ...

Page 12: ... 1 6 2 5 4 0 8 1 2 8 4 0 6 8 1 6 2 5 5 0 9 1 2 8 5 0 7 8 1 6 2 5 6 0 10 1 2 8 6 0 8 8 1 6 2 8 2 8 7 2 3 2 3 2 6 4 1 6 2 8 3 2 7 6 3 2 4 0 7 2 1 6 2 8 4 0 8 4 3 2 5 0 8 2 1 6 2 8 5 0 9 4 3 2 6 0 9 2 1 6 2 8 6 0 10 4 4 0 4 0 8 0 1 6 3 2 3 2 8 0 4 0 5 0 9 0 1 6 3 2 4 0 8 8 4 0 6 0 10 0 1 6 3 2 5 0 9 8 5 0 5 0 10 0 1 6 3 2 6 0 10 8 5 0 6 0 11 0 1 6 4 0 4 0 9 6 1 6 4 0 5 0 10 6 2 0 2 0 2 0 6 0 2 0 2 0 ...

Page 13: ...W 2 8 2 8 3 2 8 8 2 8 2 8 4 0 9 6 2 8 2 8 5 0 10 6 2 8 3 2 3 2 9 2 2 8 3 2 4 0 10 0 2 8 3 2 5 0 11 0 2 8 4 0 4 0 10 8 3 2 3 2 3 2 9 6 3 2 3 2 4 0 10 4 Cooling capacities are based on indoor temperature of 27 C DRY BULB 19 C WET BULB and outdoor air temperature of 35 C DRY BULB 24 C WET BULB Specifications are subject to change without notice for further improvement ...

Page 14: ... louver Do not adjust by hand Aluminium fin Human activity sensor Sunlight Sensor and Remote Control Receiver Indicator TIMER ECONAVI nanoe POWER White White White White 3 2 Remote Control Timer setting Airflow direction selection Mild dry operation nanoe operation Fan speed selection Transmitter Operation mode Sleep mode operation Powerful Quiet operation ECONAVI operation Remote control display ...

Page 15: ...8 266 266 128 Right piping hole Left piping hole Installation plate Indoor unit external dimensions line 460 460 43 95 Top View Front View Bottom View Rear View Relative position between the indoor unit and the installation plate Front View Side View Side View Gas side Liquid side Left piping hole Air outlet direction Air intake direction Right piping hole 22 Remote Control 160 59 Remote Control H...

Page 16: ...BLK W 1 2 CN2 WHT 3 1 ELECTRONIC CONTROLLER ECO SENSOR CN SENS 2 YLW W W W 1 2 3 FAN MOTOR 7 4 1 CN FM WHT NOISE FILTER CIRCUIT RECTIFICATION CIRCUIT M COMMUNICATION CIRCUIT GR BR W G Y 5 1 CN CNT WHT 5 1 UP DOWN LOUVER MOTOR OUTER BR O R Y P 1 5 CN STM1 WHT 1 5 M UP DOWN LOUVER MOTOR INNER BR O R Y P 1 5 CN STM3 BLU 1 5 M LEFT RIGHT LOUVER MOTOR BR O R Y P 1 5 CN STM2 YLW 1 5 M 6 1 CN TH RED t t ...

Page 17: ...ENS1 CN SENS1 YELLOW CN SENS2 YELLOW CN SENS2 YELLOW ELECTRONIC CONTROLLER ECO SENSOR SENSOR 2 ELECTRONIC CONTROLLER ECO SENSOR SENSOR 1 1 2 3 1 2 3 1 2 3 4 G2 G2 G2 5V_3 5V_3 5V_3 5V_3 1 2 3 G2 CN MSENS BLUE CN MSENS BLUE CN RCV YELLOW CN RCV WHITE 5V_3 G2 4 3 2 1 1 2 3 4 5V_ GND A GND A 1 4 3 2 1 1 2 3 4 CN DISP WHITE 2 3 4 5 6 1 2 3 4 5 6 ELECTRONIC CONTROLLER DISPLAY 5V 13V LED201 White R201 1...

Page 18: ...Printed Circuit Board 7 1 Indoor Unit 7 1 1 Main Printed Circuit Board AC303 CN STM1 CN STM3 CN STM2 CN RCV CN DISP CN DATA2 CN RMT CN TH JP1 Random Auto Restart enable disable CN MSENS CN CNT CN DATA1 CN FM ...

Page 19: ...19 7 1 2 Indicator Printed Circuit Board LED201 LED203 LED206 LED204 LED202 LED205 CN DISP 7 1 3 Receiver Printed Circuit Board CN RCV 7 1 4 High Voltage Power Supply Printed Circuit Board CN2 ...

Page 20: ... 1 5 Sub Printed Circuit Board CN NANO CN DATA2 ACN502 ACN501 ACL501 AC306 AC302 CN DATA1 7 1 6 Human Activity Sensor Printed Circuit Board 7 1 7 Comparator Printed Circuit Board CN SENS2 CN SENS1 CN MSENS ...

Page 21: ...id more than 2 blockage directions For better ventilation multiple outdoor installation please consult authorized dealer specialist Installation plate 1 Sleeve Bushing Sleeve Bend the pipe as closely on the wall as possible but be careful that it doesn t break Saddle Power supply cord Putty Gum Type Sealer Installation parts you should purchase Piping direction Attention not to bend up drain hose ...

Page 22: ...plate on the wall with 5 screws or more at least 5 screws If mounting the unit on the concrete wall consider using anchor bolts o 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 ø70 mm hole core drill o Line according to the left and right side of the installation plate The meeting point of...

Page 23: ...ugh the control board hole until terminal board area Step 4 Secure the Indoor Unit 8 2 3 3 For the embedded piping Step 1 Replace the drain hose Step 2 Bend the embedded piping Step 3 Pull the connection cable into Indoor Unit Use a spring bender or equivalent to bend the piping so that the piping is not crushed Step 4 Cut and ﬂare the embedded piping The power supply cord and indoor unit and outd...

Page 24: ...g In case of the cover is cut keep the cover at the rear of chassis as shown in the illustration for future reinstallation Left right and 2 bottom covers for piping How to keep the cover Cover for the bottom piping Tape it with piping in a position as mentioned in Fig below Cover for the right piping Piping Drain hose Cover for the left piping Right and Right Bottom piping Guide surface Connection...

Page 25: ...cable PVC tube for drain hose VP 30 PVC tube for drain hose VP 20 More than 700 mm In case of left piping how to insert the connection cable and drain hose Drain hose from main unit Cable 45 Drain hose Piping For the right piping follow the same procedure Rear view for left piping installation Drain cap Drain hose Adjust the piping slightly downwards Drain hose Connection cable Sleeve for piping h...

Page 26: ... Connection cable Escapement Terminal Board Earth Wire longer than others AC wires for safety reason Outdoor unit Indoor outdoor connection cable Holder For other indoor models L N 1 2 3 L 1 N S1 2 3 Tape Connection cable Terminal Board Control Board Earth wire longer than others AC wires for safety reason Holder Indoor outdoor connection cable Outdoor unit WARNING This equipment must be properly ...

Page 27: ...f burrs are not removed gas leakage may be caused Turn the piping end down to avoid the metal powder entering the pipe 3 Please make flare after inserting the flare nut onto the copper pipes 1 To cut 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 Improper ﬂari...

Page 28: ...n 2010 the regulations of American Society of Heating Refrigerating and Air Conditioning Engineers in the United States ANSI ASHRAE34 was issued adopting the grades for refrigerants which are difficult to inflame due to their slow burning rates and as a result have smaller damages in cases of fire The burning rate of R32 is lower by 10cm per second and safety standardization for various usage is n...

Page 29: ...e of R410A it is necessary to do installation and service using high pressure tools and components Table 2 Saturated vapor pressure comparison table Unit MPa Temperature Refrigerant R32 R410A R22 20 0 30 0 30 0 14 0 0 71 0 70 0 40 20 1 37 1 35 0 81 40 2 38 2 32 1 43 60 3 84 3 73 2 33 65 4 29 4 17 2 60 Reference Thermal properties table of Japan Society of Refrigerating and Air Conditioning Enginee...

Page 30: ...ools such as screw drivers metal saws electric drills long nose pliers hole core drills ø70 or ø65 linen tape levels temperature gauges clamp meters electric knives nippers pipe cutters reamers or scrapers spring benders diameters 1 4 3 8 1 2 5 8 monkey wrenches fixing wrenches 17 or 12 mm feeler gauges hexagon wrenches 4 mm testers megohm testers etc Tools used for services Works R32 R410A R22 In...

Page 31: ...izes R32 common R410A R22 Port sizes 1 2 UNF20 7 16 UNF20 5 Charging hoses The pressure resistance of charge hoses is increased At the same time the material is changed to HFC resistant and the size of each manifold adopter is changed as the port size of manifold gauge itself Further some hoses are with anti gas pressure backflow valves placed near the adopters hoses with the valves recommended Ma...

Page 32: ...ame time the digital scale for refrigerant charging is strengthened by receiving the weight of the refrigerant cylinders with four pillars at the corners The connection ports of charging hoses have two separate ports for R22 7 16 UNF20 and R32 R410A 1 2 UNF20 therefore they can be used for the insertion of the existing refrigerants Digital scale for refrigerant charging 9 Refrigerant cylinders Ref...

Page 33: ...for each HCF type can be used Knowledge for the common usage of tools for R410A R32 R410A and R32 machines use different compressor oils If unregulated compressor oil gets mixed into it may cause damage to the machine function Careful pump down will ensure the recovery of compressor oil and it will minimize the remaining amount of the oil in the manifold gauge and charging hose If you only perform...

Page 34: ...ention of impurity Leakage checking Insertion of refrigerant Dismantling indoor outdoor units Repairing by brazing Evacuation Air purging new installation and relocation for at or more than 15 minutes re charging at or more than 60 minutes Indoor outdoor units and piping Displacing pipes and wires and displacing indoor outdoor units Indoor outdoor units installation and piping and wiring Removal ...

Page 35: ...f moisture and dirt do not get into the pipes and make sure of no refrigerant leakage The procedure of flaring and precautions a Cutting of pipes use pipe cutter and cut the pipe slowly not to de shape the pipe b Removal of burrs on the edge of pipe reamer or scraper If the condition of pipe edge after the deburring is no good or if burrs attaches on the flaring it may cause refrigerant leakage Tu...

Page 36: ...d leave it for 1 2 minutes Then remove the connection side of the charging hose of vacuum pump adopter after checking the needle of manifold gauge does not turn back 4 Open the stem of 2 way valve to 90 in anti clock wise and close the 2 way valve after 10 seconds and perform gas leakage test 5 Remove the charge hose from the service port of 3 way valve and open the stems of 2 way and 3 way valves...

Page 37: ...y loosen the charging hose in discharging side of recovery device and perform air purge the recovery cylinder needs slight inside pressure 7 Insert electric plug of recovery device into electrical outlet the fan operation starts 8 Turn the valve 1 and 2 of recovery device to pressure equalization point 9 After a few seconds turn back the valve 1 and 2 to the original position 10 Turn the switch of...

Page 38: ...ttach and tighten the caps of two way and three way valves with torque wrench 6 Remove the connecting pipes liquid side and gas side b Removal of indoor and outdoor units 1 Remove the connecting pipes and wires between the indoor and outdoor units 2 Attach capping flare nuts on the edges of the pipes connecting the indoor and outdoor units in order to prevent dust and moisture get into the pipes 3...

Page 39: ...res below 6 Remove the charging hose red of the manifold gauge from the vacuum pump adopter 7 After adjusting the digital scale to zero open the cylinder valve and the valve Lo of the manifold gauge and insert the refrigerant 8 If it is not possible to insert the refrigerant at regulated amount at once operate the cooling mode and gradually insert the refrigerant recommended amount approx 150 g 1 ...

Page 40: ...ide check and make sure no refrigerant is contained in the air be careful with vaporized refrigerant Furthermore protect the compressor terminal with metal plates and heat but use wet clothes to cool down releasing the heat the expansion valves and four way valves prevent destruction of parts In brazing it is important to pour the brazing material without melting the base metal based on capillary ...

Page 41: ...rm the provision of gas 1 Slightly open the propane valve of the torch and make sure the gas comes out from the torch crater and then close the propane valve 2 Slightly open the oxygen valve of the torch and make sure the gas comes out from the torch crater and then close the oxygen valve Check there is no gas leakage around the hose connection 9 7 4 Adjustment of flame 1 Slightly open the propane...

Page 42: ... flame Blue color Oxidizing Flame Oxygen is more compared to the neutral flame Although the flame size is small this has the highest flame heat However due to the excessive oxygen contained in the flame the brazing point gets oxidized This flame may cause holes due to the high heat The pipe may get melt White core flame Outer flame Blue orange color 9 7 6 Closing the flame In case of short break 1...

Page 43: ...resistance in stainless steel based brazing suitable for brazing tungsten carbide aluminum bronze and copper BCuP BCuP 2 remain 6 8 7 5 approx 710 approx 785 690 815 21 24 5 Cu Good liquidity suitable for brazing copper tube BCuP 3 4 8 5 2 remain 5 8 6 7 approx 645 approx 815 720 815 21 24 5 Cu Suitable for brazing when the joint spacing is not constant BCuP 5 14 5 15 5 remain 4 8 5 3 approx 645 a...

Page 44: ...n Further by bending the brazing portion of dryer side of the capillary tube at 15 mm from the tube top to the angle of about 120 you can prevent the damage of dryer inside and the clogging of brazing material caused by the excessive insertion of capillary tube Gap 0 025 0 05 mm Insert diameter 10 25 mm Inner diameter ø6 45 Outer diameter ø6 35 Brazing material Runny Brazing material Hard to flow ...

Page 45: ... capillary tube and dryer etc caution has to be taken to apply the flame to the dryer side thick pipe side in order to prevent burn out by the heat 4 When brazing the compressor connection pipes suction and discharge remove the sound insulation plate and the fan and place the compressor stand vertically to prevent the leakage of compressor refrigerating machine oil and apply the flame from the com...

Page 46: ...n obstructing heat suction 3 Is the setting temperature on the remote controller correct is the setting temperature set at lower higher than the room temperature 9 8 2 Understanding and verification of refrigerant cycle Heat exchanger Heat exchanger Compressor COMP 4 way valve Condenser COND Expansion valve Liquid side 2 way valve Gas side 3 way valve High temp High pressure Air Mid temp High pres...

Page 47: ...re Excess insertion of refrigerant Clogged capillary expansion valve malfunction Heat releasing obstruction Clog by moisture Dirty condenser attachment of impurity Lack of refrigerant gas Compressor malfunction Operation electric current Excess insertion of refrigerant Lack of refrigerant gas Heat releasing obstruction Compressor malfunction Dirty condenser impurity Mixture of air Insufficient eva...

Page 48: ...tting temperature and it is updated continuously whenever the electrical power is supplied to the unit 10 1 2 Cooling Operation 10 1 2 1 Thermostat control Compressor is OFF when Intake Air Temperature Internal Setting Temperature 1 5 C continue for 3 minutes When compressor is OFF Thermostat OFF and AUTO FAN is set the fan will stop periodically Compressor is ON after waiting for 3 minutes if the...

Page 49: ...e 3 C if previous operate in DRY mode then continue in DRY mode otherwise COOL mode is decided o If 2 C indoor intake temperature remote control setting temperature 3 C maintain with previous mode o If indoor intake temperature remote control setting temperature 2 C HEAT mode is decided 10 2 Indoor Fan Motor Operation 10 2 1 Basic Rotation Speed rpm A Basic Rotation Speed rpm i Manual Fan Speed Co...

Page 50: ...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 increase fan motor is then stop and restart If the fan motor counter becomes 7 times then H19 fan motor error is detected Operation stops and cannot on back ...

Page 51: ...tep 3 Step 4 Step 5 Cooling Auto Usual Ventilation 55 degrees 85 degrees Control with dew 55 degrees 85 degrees Manual Usual Ventilation 55 62 72 83 85 Control with dew 55 62 72 83 85 Dry Auto Usual 55 degrees 85 degrees Control with dew 55 degrees 85 degrees Manual Usual 55 55 55 55 55 Control with dew 55 55 55 55 55 Heating Manual 55 62 72 83 90 Auto A zone 55 B zone 83 C zone 62 1 Automatic ver...

Page 52: ...epends on the indoor heat exchanger temperature as Figure 1 below It does not swing during fan motor stop Operation Mode Vane Angle Heating with heat exchanger temperature A 65 115 B 90 Cooling and soft dry 65 115 Manual horizontal airflow direction can be set using remote control the angles of the vane are as stated below and the positions of the vane are as Figure 2 above Operation Left and Righ...

Page 53: ...eration compare to normal operation Control condition o Quiet operation start condition When POWERFUL QUIET button at remote control is pressed twice QUIET will be shown on remote control display o Quiet operation stop condition When one of the following conditions is satisfied quiet operation stops POWERFUL QUIET button is pressed again Stop by OFF ON switch Timer off activates ECONAVI button is ...

Page 54: ...e unit with timer set will stop operate at set time 10 8 Sleep Mode Operation SLEEP To maximise comfort while sleeping CANCEL This operation provides you with a comfortable environment while sleeping It will automatically adjust the sleep pattern temperature during the activation period The indoor unit indicator will dim when this operation is activated This is not applicable if the indicator brig...

Page 55: ...eration resume after indoor fan restarts o When indoor intake temperature 35 C and 5 C nanoe operation resume after indoor intake temperature 35 C or 5 C continuously for 6 minutes Indoor fan control o During any operation mode combines with nanoe operation fan speed follows respective operation mode However nanoe system enabled when fan speed 470 rpm to ensure proper negative ion distribution nan...

Page 56: ...when disconnection detected Timer LED blinks nanoe Abnormal Detection o Disconnection Abnormality Abnormal detection condition Start from 1 sec after nanoe power ON 6 secs has passed and in this 6 secs period abnormal signal is detected continuously for 5 9 secs Action after abnormal detection condition fulfilled Disconnection counters 1 nanoe power OFF for 5 minutes and then restart However accor...

Page 57: ...normal for 50 mins above or when operations stop 10 12 ECONAVI Operation Area of human availability activity level and absent is judged based on pulses by using 2 infrared sensors The internal setting temperature shift fan speed and horizontal airflow direction are adjusted in order to provide comfort environment while maintain the energy saving level ECONAVI start condition o When ECONAVI button ...

Page 58: ...y Level Judgment Setting Position Judgment 10 12 1 1 Signal Detection C B A 7m 120 7m 2m Human Activity sensor will turns on according to infrared sensors signal detection Signal detection Possible detected human position area Sensor 1 Sensor 2 1 0 C 0 1 A 1 1 B A C B C A C A B C 0 0 10 12 1 2 Information Log The signal from Infrared sensors will be log to human activity database for further analy...

Page 59: ...on position when there is only one activity area detected the horizontal airflow direction louver position is fixed according to chart below Target area Horizontal airflow direction louver position Left installation Center installation Right installation A 3 2 2 B 1 1 1 C 5 5 4 Louver position refer to horizontal airflow direction control When 2 activity areas have been detected according to Human...

Page 60: ...ndition o Unit is off or o ECONAVI is off or o Human activity sensor detects high activity level or absent or Control contents o When all start conditions complied set temperature will shift accordingly as following ECONAVI Detecting human presence and activity the unit controls room temperature to save energy Mode Human Low activity Normal activity High activity Absent COOL DRY Set temperature 1 ...

Page 61: ...r to next detection If no activity detection the last action will maintain for 30 seconds before changeover to human absence status 10 12 1 11 Human Activity Sensor Abnormality Abnormality detection Connector disconnection Wire cut abnormality o Sensor judge Hi level continuously for 25 seconds Circuit abnormality o 70 seconds after power ON if human activity sensor judge Lo level continuously for...

Page 62: ...The unit could operate without ECONAVI The ECONAVI indicator blinking could be cancelled by pressing ECONAVI button again If the human activity sensor has no abnormality the CHECK process will end and continue with normal operation 10 12 2 Sunlight Sensor During ECONAVI operation the sunlight sensor detects sunlight intensity coming through windows and differentiates between sunny and cloudy or ni...

Page 63: ...er than default Display last set data Transmit solar radiation level after 30 secs go back to normal mode Set to Level 4 Press Timer Set to Level 5 Set to Level 1 Set to Level 2 Remote control normal mode 10 12 2 3 Judge Ambient Condition According to sunlight intensity over a period of time the system will analyze the ambient condition is sunny cloudy or night 10 12 2 4 Temperature Shift Set temp...

Page 64: ...ator turns ON Else if sunlight sensor detected sunlight intensity value below minimum level the ECONAVI indicator is OFF To disable sunlight sensor check mode o After check mode is ended 5 minutes counter elapsed press AUTO OFF ON button at indoor unit o If the sunlight sensor detected sunlight intensity is at abnormal range the check mode will be ended Please check for error code 10 12 2 6 Sunlig...

Page 65: ...etting temperature Capability supply OFF point 11 3 Heating Operation 11 3 1 Thermostat control Capability supply to indoor unit is OFF Expansion valve closed when Intake Air Temperature Internal setting temperature 1 0 C During this condition the indoor fan is stopped if compressor is ON Capability resume supply to indoor unit after waiting for 3 minutes if the Intake Air Temperature Internal set...

Page 66: ...ft lower up to 4 C for Cooling Soft Dry or higher up to 6 C for heating than remote control setting temperature the powerful operation continue until user cancel the Powerful operation by pressing powerful button again 11 7 Auto Restart Control When the power supply is cut off during the operation of air conditioner the compressor will re operate between three to four minutes 10 patterns to be sel...

Page 67: ...3 REMOTE CONTROL NUMBER SWITCH MODE The Remote Control Number Switch Mode will be activated if the Auto OFF ON button is pressed continuously for more than 11 seconds 3 beep sounds will occur at 11th seconds to identify the Remote Control Number Switch Mode is in standby condition and press AC RESET button and then press any button at remote control to transmit and store the desired transmission c...

Page 68: ... counter for Remote Control Receiving Sound OFF ON Mode is restarted 12 2 Remote Control Button 12 2 1 SET Button To check remote control transmission code and store the transmission code to EEPROM o Press Set button by using pointer o Press Timer Set button until a beep sound is heard as confirmation of transmission code changed 12 2 2 RESET RC To clear and restore the remote control setting to f...

Page 69: ...during operation Normal Inefficient compressor Insufficient refrigerant Excessive amount of refrigerant Dusty condenser preventing heat radiation Measuring the air temperature difference Measuring electric current during operation Less than 8 C at the cooling mode Less than 14 C at the heating mode Higher than specified Gas side pressure Clogged strainer or capillary tube Measuring gas side pressu...

Page 70: ...e Electric current during operation Low Pressure High Pressure Electric current during operation Insufficient refrigerant gas leakage Clogged capillary tube or Strainer Short circuit in the indoor unit Heat radiation deficiency of the outdoor unit Inefficient compression Carry out the measurement of pressure electric current and temperature fifteen minutes after an operation is started ...

Page 71: ...lay Memorized Error Code Protective Operation 1 Turn power on 2 Press the CHECK button on the remote controller continuously for 5 seconds 3 will be displayed on the remote controller display Note Display only for No transmitting signal no receiving sound and no Power LED blinking 4 Press the TIMER or button on the remote controller The code H00 no abnormality will be displayed and signal will be ...

Page 72: ...ality Port is ON for 10s during ion device off ion device PCB H27 Outdoor air temperature sensor abnormality Continuous for 5s Outdoor air temperature sensor open or short circuit Outdoor air temperature sensor lead wire and connector H28 Outdoor heat exchanger temperature sensor 1 abnormality Continuous for 5s Outdoor heat exchanger temperature sensor 1 open or short circuit Outdoor heat exchange...

Page 73: ...d wire and connector F17 Indoor standby units freezing abnormality 3 times happen within 40 minutes Wrong wiring and connecting pipe expansion valve leakage indoor heat exchanger sensor open circuit Check indoor outdoor connection wire and pipe Indoor heat exchanger sensor lead wire and connector Expansion valve lead wire and connector F90 Power factor correction PFC circuit protection 4 times hap...

Page 74: ...ly abnormal fluctuation Defect in communication circuitry of outdoor unit PCB Replace the PCB Measure the DC voltage at terminal 2 3 communication Is the measured DC voltage fluctuate between 10 70V Measure the AC voltage at terminal 1 2 of indoor unit Is the measured voltage 230 240V YES Measure the DC voltage at terminal 2 3 of indoor unit Is the measured DC voltage fluctuate between 10 70V For ...

Page 75: ...are interconnected Malfunction Caused Wrong models interconnected Wrong indoor unit or outdoor unit PCBs mounted Indoor unit or outdoor unit PCBs defective Indoor outdoor unit signal transmission error due to wrong wiring Indoor outdoor unit signal transmission error due to breaking of wire 3 in the connection wires between the indoor and outdoor units Troubleshooting ...

Page 76: ...ction Decision Conditions During startup and operation of cooling and heating the temperatures detected by the indoor intake air temperature sensor are used to determine sensor errors Malfunction Caused Faulty connector connection Faulty sensor Faulty PCB Troubleshooting ...

Page 77: ...n Decision Conditions During startup and operation of cooling and heating the temperatures detected by the outdoor compressor temperature sensor are used to determine sensor errors Malfunction Caused Faulty connector connection Faulty sensor Faulty PCB Troubleshooting ...

Page 78: ...ion Conditions An input current detected by Current Transformer CT is below threshold value when the compressor is operating at certain frequency value for 3 minutes Malfunction Caused Lack of gas Broken CT current transformer Broken Outdoor PCB Troubleshooting ...

Page 79: ...termine abnormal fan motor feedback of rotation 2550 rpm or 50 rpm Malfunction Caused Operation stops due to short circuit inside the fan motor winding Operation stops due to breaking of wire inside the fan motor Operation stops due to breaking of fan motor lead wires Operation stops due to Hall IC malfunction Operation error due to faulty indoor unit PCB Troubleshooting ...

Page 80: ... Decision Conditions During startup and operation of cooling and heating the temperatures detected by the indoor heat exchanger temperature sensor are used to determine sensor errors Malfunction Caused Faulty connector connection Faulty sensor Faulty PCB Troubleshooting ...

Page 81: ...ction Decision Conditions During startup and operation of cooling and heating the temperatures detected by the outdoor air temperature sensor are used to determine sensor errors Malfunction Caused Faulty connector connection Faulty sensor Faulty PCB Troubleshooting ...

Page 82: ...ction Decision Conditions During startup and operation of cooling and heating the temperatures detected by the outdoor pipe temperature sensor are used to determine sensor errors Malfunction Caused Faulty connector connection Faulty sensor Faulty PCB Troubleshooting ...

Page 83: ...tion Decision Conditions During startup and operation of cooling and heating the temperatures detected by the outdoor discharge pipe temperature sensor are used to determine sensor errors Malfunction Caused Faulty connector connection Faulty sensor Faulty PCB Troubleshooting ...

Page 84: ...nction Decision Conditions During startup and operation of cooling and heating the temperatures detected by the outdoor heat exchanger temperature sensor are used to determine sensor errors Malfunction Caused Faulty connector connection Faulty sensor Faulty PCB Troubleshooting ...

Page 85: ...alfunction Decision Conditions The supply power is detected for its requirement by the indoor outdoor transmission Malfunction Caused Wrong models interconnected Wrong indoor unit and outdoor unit PCBs used Indoor unit or outdoor unit PCB defective Troubleshooting ...

Page 86: ...ction Decision Conditions During startup and operation of cooling and heating the temperatures detected by the outdoor heat sink temperature sensor are used to determine sensor errors Malfunction Caused Faulty connector connection Faulty sensor Faulty PCB Troubleshooting ...

Page 87: ...Decision Conditions During startup and operation of cooling and heating the temperatures detected by the outdoor gas pipe temperature sensor are used to determine sensor errors Malfunction Caused Faulty connector connection Faulty sensor Faulty PCB Troubleshooting ...

Page 88: ...ction Decision Conditions During startup and operation of cooling and heating the temperatures detected by the outdoor liquid pipe temperature sensor are used to determine sensor errors Malfunction Caused Faulty connector connection Faulty sensor Faulty PCB Troubleshooting ...

Page 89: ...CB Does it rotate Is the resistance normal Use an inverter check to check on the power transistor on board Connect it to PCB s CN MRT2 port Turn power ON and run the unit Do all 6 LED light turn ON and turn OFF periodically Does the voltage at each terminal becomes 5 and 0Vdc repeatedly U NO YES V W NO YES NO YES NO YES When abnormality indication starts again Turn off power supply and rotate fan ...

Page 90: ... operation is used to determine abnormal fan motor Malfunction Caused Operation stops due to short circuit inside the fan motor winding Operation stops due to breaking of wire inside the fan motor Operation stops due to breaking of fan motor lead wires Operation stops due to Hall IC malfunction Operation error due to faulty outdoor unit PCB Troubleshooting ...

Page 91: ...h pressure is detected when indoor heat exchanger is detecting very high temperature when the unit is operating in heating operation Phenomena unit is stopping and re starting very often in heating mode Malfunction Caused Indoor heat exchanger thermistor Clogged air filter or heat exchanger Over bent pipe liquid side Troubleshooting ...

Page 92: ...l takes place when indoor pipe temperature is lower than 2 C Malfunction Caused Air short circuit at indoor unit Clogged indoor unit air filter Dust accumulation on the indoor unit heat exchanger 2 3 way valve closed Faulty indoor unit fan motor Refrigerant shortage refrigerant leakage Clogged expansion valve or strainer Faulty indoor pipe temperature sensor Faulty indoor unit PCB Troubleshooting ...

Page 93: ...is cold during heating except deice or when indoor heat exchanger is hot during cooling and compressor operating the 4 way valve is detected as malfunction Malfunction Caused Indoor heat exchanger pipe thermistor 4 way valve malfunction Troubleshooting Check gas side pipe for hot gas flow in cooling mode ...

Page 94: ...rature and indoor pipe temperature is above 10 C or indoor pipe temperature is below 1 0 C Remark When the indoor standby unit is freezing the outdoor unit transfers F17 error code to the corresponding indoor unit and H39 to other indoor unit s Malfunction Caused Wrong wiring connection Faulty sensor Faulty expansion valve Troubleshooting ...

Page 95: ...startup and operation of cooling and heating when Power Factor Correction PFC protection circuitry at the outdoor unit main PCB senses abnormal DC voltage level for power transistors When DC voltage detected is LOW transistor switching will turn ON by controller to push up the DC level When DC voltage detected is HIGH 391Vdc 425Vdc active LOW signal will send by the controller to turn OFF relay RY...

Page 96: ...rigeration Cycle Abnormality Malfunction Decision Conditions The input current is low while the compressor is running at higher than the setting frequency Malfunction Caused Lack of gas 3 way valve close Troubleshooting ...

Page 97: ...ion Decision Conditions A compressor rotation failure is detected by checking the compressor running condition through the position detection circuit Malfunction Caused Compressor terminal disconnect Faulty Outdoor PCB Faulty compressor Troubleshooting ...

Page 98: ... the outdoor unit heat exchanger thermistor Malfunction Caused Outdoor heat exchanger temperature rise due to short circuit of hot discharge air flow Outdoor heat exchanger temperature rise due to defective of outdoor fan motor Outdoor heat exchange temperature rise due to defective outdoor heat exchanger thermistor Outdoor heat exchanger temperature rise due to defective of outdoor unit PCB Troub...

Page 99: ...ted o Heat Sink Overheating During operation of cooling and heating when heat sink temperature data 90 C is detected by the heat sink temperature sensor Malfunction Caused IPM overheats due to short circuit of hot discharge air flow IPM overheats due to defective of outdoor fan motor IPM overheats due to defective of internal circuitry of IPM IPM overheats due to defective IPM temperature sensor M...

Page 100: ...ling and heating when compressor tank temperature data 112 C is detected by the compressor tank temperature sensor Malfunction Caused Faulty compressor tank temperature sensor 2 3 way valve closed Refrigerant shortage refrigerant leakage Faulty outdoor unit PCB Faulty compressor Troubleshooting ...

Page 101: ...ion of cooling and heating when an input over current X value in Total Running Current Control is detected by checking the input current value being detected by current transformer CT with the compressor running Malfunction Caused Excessive refrigerant Faulty outdoor unit PCB Troubleshooting ...

Page 102: ...heating when inverter DC peak data is received by the outdoor internal DC Peak sensing circuitry Malfunction Caused DC current peak due to compressor failure DC current peak due to defective power transistor s DC current peak due to defective outdoor unit PCB DC current peak due to short circuit Troubleshooting ...

Page 103: ...edures 14 1 1 To Remove Front Grille 1 Remove 2 caps and 2 screws at the bottom of front grille 2 Remove 1 screw at the middle of front grille 3 Hold both sides of the front grille and gently remove it by pulling up and toward yourself Figure 1 14 1 1 1 Caps Removal Use long nose pliers to pull out the caps CAUTION a Use a manual screw driver with at least 150 mm shaft length Do not use a hand dri...

Page 104: ...connectors as labelled from the electronic controller Then pull out the electronic controller gently 7 Detach CN DISP and CN RCV connectors from indicator complete 5 Remove earth wires 8 Remove screw to remove terminal board complete 9 Pull out the electronic controller halfway CN FM CN TH AC303 WHT CN MSENS CN STM3 CN STM2 CN STM1 Figure 3 Figure 4 CN DATA1 CN DATA2 CN NANO During assembly of PCB...

Page 105: ...nit HVU unit Figure 6 13 Then pull the discharge grille downward gently to dismantle it 12 Pull out and remove the drain hose from the discharge grille Figure 7 14 1 4 To Remove Control Board 14 Remove the 4 screws holding the control board then pull out the control board Figure 8 ...

Page 106: ...106 14 1 5 To Remove Cross Flow Fan and Indoor Fan Motor Figure 9 17 Remove the bearing by pulling it gently 16 Remove the screw from the evaporator Figure 10 ...

Page 107: ...ator Cross flow fan 20 Fan motor can be removed after the removal of the cross flow fan Evaporator Reminder To reinstall the fan motor adjust the fan motor connector to 90 towards you before fixing control board Figure 11 Reminder To reinstall the cross flow fan ensure cross flow fan is in line as shown in figure 12 Cross Flow Fan Figure 12 ...

Page 108: ...e the Front Grille CAUTION Do not directly fix the front grille complete to avoid hitting the Receiver PCB Receiver PCB Figure 13 21 Gently assemble the right side of the front grille first then fix the left side Figure 14 ...

Page 109: ...Assemble the Intake Grille Hook Intake Grille 22 Align the intake grille hooks into the slot Hook 23 Place in the hook to the slot 24 Then slightly bend the intake grille and push in the hooks into the slot Figure 15 ...

Page 110: ...10 14 11 47 34 39 33 26 42 41 44 1 19 17 27 13 38 18 42 45 46 12 35 37 36 15 16 28 29 34 40 48 CWH55025J CWH55051J 8 7 24 25 21 23 22 20 45 9 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 ...

Page 111: ...LECTRONIC CONTROLLER ECO SENSOR2 1 CWA746206 O 23 ELECTRONIC CONTROLLER COMPARATOR 1 CWA747891 O 24 ELECTRONIC CONTROLLER HVU 1 N0GE1E000006 O 25 GENERATOR COMPLETE 1 CWH94C0056 O 26 DISCHARGE GRILLE COMPLETE 1 ACXE20C00220 ACXE20C00430 27 FULCRUM 8 CWE241457 28 VERTICAL VANE 1 CWE261314 33 VANE COMPLETE 1 ACXE24C00240 ACXE24C00400 34 VANE COMPLETE 1 CWE24C1531 35 FAN MOTOR ASSY 1 ACXA98K00020 O 3...

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Panasonic CS-MZ5SKE, Service Manual, Page: 93 / 111

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