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Panasonic CU-3E18LBE [58/103] Troubleshooting guide
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58
17 Troubleshooting Guide
17.1. Self Diagnosis Function (CU-3E18LBE and CU-4E23LBE)
Abnormality
judgement
Emergency
operation
Primary location to verify
Diagnosis
display
Abnormality or protection control
H11 Indoor/outdoor abnormal
communication
> 1 min after starting
operation
Indoor fan operation can
start by entering into force
cooling operation
• Internal/external cable
connections
• Indoor/outdoor PCB
H12 Indoor unit capacity unmatched — — • Indoor unit total capacity
H14 Intake air temperature unmatched — — • Intake air temperature sensor
(defective or disconnected)
H16 Outdoor current transformer — — • Decreased amount of refrigerant
• Outdoor PCB
H19 Indoor fan motor mechanism lock — — • Fan motor
• Indoor PCB
H23 Indoor heat exchanger temperature
sensor
Continue for 5 sec — • Heat exchanger temperature
sensor
(defective or disconnected)
H27 Outdoor air temperature sensor Continue for 5 sec — • Outdoor air temperature sensor
(defective or disconnected)
H28 Outdoor heat exchanger temperature
sensor 1
Continue for 5 sec — • Outdoor heat exchanger
temperature sensor
(defective or disconnected)
H30 Outdoor discharge pipe temperature
sensor
Continue for 5 sec — • Outdoor discharge pipe
temperature sensor
(defective or disconnected)
H32 Outdoor heat exchanger temperature
sensor 2 (discharge pipe temp)
Continue for 5 sec — • Outdoor heat exchanger
temperature sensor
(defective or disconnected)
H34 Outdoor heatsink temperature sensor at
Control Board
Continue for 2 sec — • Outdoor heatsink temperature
sensor at control board
(defective or disconnected)
H36 Outdoor gas pipe temperature sensor Continue for 2 sec — • Outdoor gas pipe temperature
sensor
(defective or disconnected)
H37 Outdoor liquid pipe temperature sensor Continue for 2 sec — • Outdoor liquid pipe temperature
sensor
(defective or disconnected)
H39 Abnormal indoor operating unit or
standby units
— — • Piping connection error
• Indoor/outdoor connection cable
connection error
H41 Abnormal wiring or piping connection — — • Wiring or piping connection
H97 Outdoor fan motor mechanism lock — — • Outdoor fan motor
H98 Indoor high pressure protection — — • Air filter dirty
• Air circulation short circuit
H99 Indoor heat exchanger freeze
protection
— — • Insufficient refrigerant
• Air filter dirty
F11 Cooling/heating cycle changeover
abnormality
4 times occurrences
within 30 minutes
—•4-way valve
•V-coil
F17 Indoor standby unit freezing — — • Outdoor expansion valve leakage
• Indoor unit pipe temperature
sensor
F90 PFC circuit protection — — • Outdoor PCB
• Outdoor fan motor
F91 Refrigeration cycle abnormality 2 times occurrences
within 20 minutes
— • No refrigerant (3-way valve is
closed)
Содержание
- Air conditioner 1
- Cu 2e15lbe cu 2e18lbe cu 3e18lbe cu 4e23lbe 1
- Outdoor unit 1
- Table of contents 1
- 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 3
- 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 3
- Safety precautions 3
- The items to be followed are classified by the symbols 3
- Cu 2e15lbe 5
- Specifications 5
- Note specifications are subject to change without notice for further improvement 6
- Cu 2e18lbe 7
- Note specifications are subject to change without notice for further improvement 7
- Cu 3e18lbe 8
- Note specifications are subject to change without notice for further improvement 8
- Cu 4e23lbe 9
- Note specifications are subject to change without notice for further improvement 9
- Dimensions 17
- Check points 33
- Cu 2e15lbe 33
- Installation information 33
- The shapes of the 3 way valve caps of the outdoor unit have been changed 33
- Check points 34
- Cu 2e18lbe 34
- The shapes of the 3 way valve caps of the outdoor unit have been changed 34
- After selecting the best location start installation to indoor outdoor unit installation diagram 1 fix the unit on concrete or rigid frame firmly and horizontally by bolt nut ø10 mm 2 when installing at roof please consider strong wind and earthquake please fasten the installation stand firmly with bolt or nails 37
- Cu 2e15lbe cu 2e18lbe 37
- Disposal of outdoor unit drain water 37
- If a drain elbow is used the unit should be placed on a stand which is taller than 3 cm if the unit is used in an area where temperature falls below 0 c for 2 or 3 days in succession it is recommended not to use a drain elbow for the drain water freezes and the fan will not rotate 37
- 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 common length additional refrigerant should be added as shown in the table 37
- Install the outdoor unit 37
- Installation instruction 37
- Select the best location 37
- Connecting the piping 38
- Evacuation of the equipment for europe and oceania destination 38
- Connect the cable to the outdoor unit 39
- Pipe insulation 39
- Cu 3e18lbe cu 4e23lbe 40
- 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 40
- If total piping length of all indoor units exceed the equivalent length listed above additional charge with 20g of refrigerant r410a for each additional meter of piping 40
- In case of indoor is cs e21 cs xe21 then ø 12 t0 gas pipe size must be used together with cz ma2p pipe size expander 40
- Select the best location 40
- After selecting the best location start installation to indoor outdoor unit installation diagram 1 fix the unit on concrete or rigid frame firmly and horizontally by bolt nut ø10 mm 2 when installing at roof please consider strong wind and earthquake please fasten the installation stand firmly with bolt or nails 41
- Connect the piping 41
- 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 41
- Install the outdoor unit 41
- Outdoor unit installation guidelines where a wall or other obstacle is in the path of outdoor unit s intake or exhaust airflow follow the installation guidelines below for any of the below installation patterns the wall height on the exhaust side should be 1200mm or less 41
- Remove the control board cover resin from the unit by loosening three screws 41
- Evacuation of the equipment 42
- Connect the cable to the outdoor unit 43
- Heat insulation 44
- Compressor operation frequency 45
- Deice operation 45
- Operation control cu 2e15lbe and cu 2e18lbe 45
- Annual cooling control 46
- Cooling operation 46
- Operation control cu 3e18lbe and cu 4e23lbe 46
- Outdoor fan control 46
- Heating operation 47
- Outdoor fan control 47
- Powerful operation 1 47
- Powerful operation 2 47
- Simultaneous operation control 48
- Compressor overheating prevention control 49
- Ipm power transistor prevention control 49
- Protection control cu 2e15lbe and cu 2e18lbe 49
- Time delay safety control 49
- Total running current control 49
- 4 way valve failure protection control 50
- Cooling overload control 50
- Low pressure prevention control gas leakage detection 50
- Protection control for cooling soft dry operation 50
- Abnormal wiring or piping connection checking control 51
- Intake air temperature control 51
- Outdoor air temperature control 51
- Overload protection control 51
- Protection control for heating operation 51
- Dew prevention control cool 52
- Electronic parts temperature rise protection 1 cool 52
- Electronic parts temperature rise protection 2 cool 52
- Freeze prevention control cool 52
- Protection control cu 3e18lbe and cu 4e23lbe 52
- Cooling overload control cool 53
- Extreme low temperature compressor low pressure protection control heat 53
- Heating overload control heat 53
- 30 seconds force operation 54
- Compressor protection control gas leak detection control 1 54
- Deice control 54
- Ipm power transistor protection control 54
- Time delay safety control restart control 54
- Total current control 54
- Compressor discharge high pressure protection control 55
- Compressor protection control gas leak detection control 2 55
- Valve close detection control 55
- Cu 3e18lbe cu 4e23lbe 56
- Pump down operation sw1 56
- Servicing mode 56
- Test run operation 56
- Cooling only function 57
- Mode priority function 57
- Power save mode 57
- Wiring error check 57
- Self diagnosis function cu 3e18lbe and cu 4e23lbe 58
- Troubleshooting guide 58
- Note frequency measured and fan speed fixed 59
- Self diagnosis function cu 2e15lbe and cu 2e18lbe 60
- The display screen of wireless remote control unit and the self diagnosis leds green on the outdoor printed circuit board in the outdoor unit can be used to identify the location of the problem refer to the table below to identify and solve the cause of the problem and then re start the air conditioner system if the problem is solved and operation returns to normal led 1 illuminates and others led are off 60
- Led 1 illuminate is indicated that outdoor unit is operating normally if the led 1 is switched off or flashing check the power supply and self diagnosis indication 62
- Disassembly and assembly instructions 63
- Outdoor unit removal procedure cu 2e15lbe cu 2e18lbe 63
- Removing the cabinet top plate and cabinet front plate 63
- Removing the control board 63
- Removing the control board cover 63
- Outdoor unit removal procedure cu 3e18lbe cu 4e23lbe 64
- Removing the cabinet top plate and cabinet front plate 64
- Removing the propeller fan and fan motor 64
- Remove the control board cover and particular plates 65
- Removing the control p c board 65
- Removing the propeller fan and fan motor 66
- Technical data 67
- Cu 2e15lbe cu 2e18lbe 99
- Exploded view and replacement parts list 99
- Note all parts are supplied from phaam malaysia vendor code 00029488 o marked parts are recommended to be kept in stock 100
- Cu 3e18lbe cu 4e23lbe 101
- Note all parts are supplied from phaam malaysia vendor code 00029488 o marked parts are recommended to be kept in stock 103
- Phaam printed in malaysia sfbz10 10 0 1 103
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