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EN - 48

Failure Diagnosis

Method of Checking the Resistance of Electronic Expansion Valve Coil

■

Electronic expansion valve coil:

(Split cycle electronic expansion valve MOV3 and Adjusting refrigerant amount electronic expansion valve MOV4)

Measure the resistance value by disconnecting the connector from the control PCB, and check if the resistance value
is normal.

Control PCB will fail when the refrigerator power is supplied while the coil resistance is 0

(shorted).

When a motion failure of an electronic expansion valve is questioned, always check the resistance
value of the electronic expansion valve before replacing the control PCB.

Measurement Position

Resistance Value

Between connector 1-6

185

± 18

Between connector 2-6

185

± 18

Between connector 3-6

185

± 18

Between connector 4-6

185

± 18

(Ambient temperature: 20 °C)

Caution

[Resistance measurement method]

Contact the tester lead
to the terminal.

< Electronic expansion valve wiring connector >
6P1: Split cycle electronic expansion valve (MOV3)
6P2: Adjusting refrigerant amount

electronic expansion valve (MOV4)

01̲OCU-CR200VF5.indd 48

2018/12/28 15:17:15

Содержание OCU-CR200VF5

Страница 1: ...before Operation 28 Setting and Indication 29 33 Control Functions 34 36 Adjustment during Operation 36 38 About Alarms 38 39 Maintenance and Inspection 40 Actions at the time of Failure 41 42 Failure Diagnosis 43 50 Model No OCU CR200VF5 OCU CR200VF5SL Thank you very much for purchasing Panasonic products this time Please read this instruction booklet and correctly comply with the explanations In...

Страница 2: ...rly skilled person Incorrect installation work may lead to malfunction such as abnormal vibration and generates refrigerant gas leak electrical shock or fire Do not use other than the designated refrigerant for charging adding or recharging Non designated refrigerant may cause equipment failure or burst or injury Appliances employing R744 refrigeration system System contains refrigerant under high...

Страница 3: ...s equipment failure and rupture of the refrigerant cycle Electrical Work Always use a dedicated circuit and install a ground fault protector Incorrect electrical work may lead to current leak and fire or electrical shock Wiring work should conform to the installation instructions Grounding Work Lack of grounding work may lead to electrical shock caused by current leak Securely carry out grounding ...

Страница 4: ...f controlling concentration of refrigerant gas install a leak detector and mechanical ventilation equipment in the refrigerant handling facility inside the room Refrigerant gas leak may cause suffocation Restriction on use of equipment The appliance is not to be used by persons including children with reduced physical sensory or mental capabilities or lack of experience and knowledge unless they h...

Страница 5: ... short circuit and may cause fire or electrical shock Specified components must be used for repair Use of non specified components may cause failure of the safety stop function and lead to burst or fire Consult with the distributor Stop the compressor before disconnecting the refrigerant piping Disconnecting the piping while the compressor is in operation would cause abnormally high pressure with ...

Страница 6: ...slipping on the floor Install in a place without air stagnation Leak of refrigerant gas may cause insufficient oxygen and harm human health Install in a place with good ventilation Request a specialty operator for moving the refrigeration unit Incorrect moving may cause falling or dropping of the refrigeration unit and cause injury Refrigeration unit is a heavy item Always consult with a specialty...

Страница 7: ...of the ground fault protector Failed interrupter does not operate safety stop function and may lead to fire or electrical shock When removing the fin guard of the gas cooler do not touch the fin Touching the fin and sliding along the fin may cause skin cut by the fin edge Do not ride on the refrigeration unit Riding on the refrigeration unit or placing an article on it may lead to falling or dropp...

Страница 8: ... used electrical and electronic products must not be mixed with general household waste For proper treatment recovery and recycling of old products please take them to applicable collection points in accordance with your national legislation By disposing of them correctly you will help to save valuable resources and prevent any potential negative effects on human health and the environment For mor...

Страница 9: ...valve MOV4 Compressor High pressure service valve Low pressure service valve Liquid line unit outlet Suction line unit inlet Balance pressure solenoid valve EV2 Electrical box Electrical box internal layout Top side Control terminal base Power source terminal base Terminal Base for showcase operation signal Terminal Base for liquid tube electromagnetic valve Reactor 01 OCU CR200VF5 indd 9 01 OCU C...

Страница 10: ...ture 10 K or above Ambient temperature 15 C to 43 C Gas cooler intake air temperature Power source 50 Hz 220 V 230 V 240 V Within 10 of Rate Voltage Installation inclination angle 1 or below ON OFF cycle period 10 minutes or longer for ON OFF cycle Oil return shall be ensured Installation Outdoor The foundation shall be rigid enough Climatic class 0 1 2 3 4 6 8 Please see below CLIMATIC CLASS Oper...

Страница 11: ...capacity P2 3 85 3 85 3 85 1 91 1 91 1 91 kW Power input D2 1 47 1 47 1 47 1 44 1 44 1 44 kW COP COP2 2 62 2 62 2 62 1 33 1 33 1 33 43 C Cooling capacity P3 3 10 3 10 3 10 1 54 1 54 1 54 kW Power input D3 2 04 2 03 2 03 2 01 2 01 2 01 kW COP COP3 1 52 1 53 1 53 0 77 0 77 0 77 Compressor rotational speed 65 s 1 Suction superheat 10K Sound pressure level The A weighted sound pressure level does not ...

Страница 12: ...ll the included filter dryer at the liquid line of the refrigeration unit 6 Gas leak detector used for airtight test should be foaming liquid or soap water Do not use kitchen detergent Kitchen detergent may corrode metals For Economically Using the Refrigeration Unit For the purpose of using the refrigeration unit economically consider the following Cooling capacity largely vary by the method of u...

Страница 13: ...sts of high precision components Use caution during piping work to avoid contamination of dust metal powder or oxide scale etc Initial Oil Quantity Model No Compressor OCU CR200VF5 SL 300 mL Oil type PZ 68S When adding oil or changing oil be sure to use our specified oil General Cautions Each unit of the equipment should be placed by selecting the most convenient location such as easy to install o...

Страница 14: ...efrigeration unit is often affected by rainwater and drain water from defrosting Apply drain water work as required Location not affected by snow accumulation Installation in a cold weather location should avoid snow accumulation and attachment of frost or freezing by furnishing a roof Direction for avoiding strong wind Install the refrigeration unit with its blow out side facing perpendicular to ...

Страница 15: ...olts 2 When using angles Secure angles on a firm concrete foundation by using anchor bolts 3 Anchor bolts Use M8 size anchor bolts and buried at least 100 mm on the concrete foundation Fix unit with double nut and plain washer 28 mm O D minimum External Dimensions Optional Accessories The following service piping optional is required for the installation and service work of the refrigeration unit ...

Страница 16: ...m or below 2000 mm or wider Stacked installation 150 mm or wider 100 mm or wider When installing next to a top blow refrigeration unit h 500 h mm or wider Partition plate Avoid direct entry of the blow out heat into the heat exchanger of the top blow refrigeration unit When installation cannot be avoided install a partition plate In the case of face to face installation 600 mm or wider 3500 mm or ...

Страница 17: ...ow speed and making sure no problem occurs in the cooling capacity and oil return As refrigeration unit using CO2 refrigerant incurs pressure higher than when using HFC refrigerant it is necessary to choose adequate materials Model No Suction line Unit inlet Liquid line Unit outlet OCU CR200VF5 SL Ø9 52 mm 3 8 Ø6 35 mm 1 4 Note Welding is inner diameter welding Piping material should be seamless p...

Страница 18: ...deburring copper pipe Airtight Test Pressure testing should only be carried out by personal companies who have necessary certification Consider carefully local regulations and EN378 Design pressure in Factory High pressure side Low pressure side 12MPa 8MPa Piping Direction The pipe can be connected from 3 directions front back or right side of the unit When connecting the refrigerant pipe remove t...

Страница 19: ...uld be covered with heat insulation material on both suction line and liquid line Since liquid line becomes approx 0 C during operation apply heat insulation of 20 mm or more in thickness Expansion valve Liquid trap Make the bent higher than the evaporator Suction line Liquid line Refrigeration unit Back up solenoid valve Downward slope 5 m or below Evaporator Refrigeration unit Downward slope Oil...

Страница 20: ...ssure sensor Gas cooler outlet temperature sensor Refrigerant amount adjustment tank Adjusting refrigerant amount solenoid valve EV1 Intermediate pressure sensor Gas cooler Inter cooler 2nd stage suction Compressor 2nd stage discharge 1st stage suction 1st stage discharge Balance pressure solenoid valve EV2 Check valve Low pressure sensor Suction filter Suction gas temperature sensor Low pressure ...

Страница 21: ...ck Operation Switch S1 is ON If yes the unit is confirmed to enter Vacuum Mode even though 7 segment LED is showing uAcU the unit is not in the Vacuum Mode if S1 is OFF In the Vacuum Mode all electronic expansion and solenoid valves open 3 Evacuation Connect the vacuum pressure gauge and vacuum pump to the low pressure and high pressure service ports and set both the Mid position Explanation of ea...

Страница 22: ...low can be referenced in addition to above In the case of a freezer reach in case 1 260 g 12 g m x piping length one way m In the case of a refrigeration showcase 825 g m x showcase length m 12 g m x piping length one way m Note 1 Do not absolutely charge liquid refrigerant from the low pressure side low pressure service port 2 To avoid overcharging charging rate should be around 20 g per 5 sec 3 ...

Страница 23: ...tal edge Selection of a Ground Fault Protector and Wiring Model No Ground fault protector Power line thickness for wiring length mm2 Grounding wire cross sectional area mm2 Control circuit cross sectional area mm2 Rated current Detected current 10 m 20 m 30 m 50 m OCU CR200VF5 SL 16 A 30 mA 2 5 2 5 2 5 2 5 2 5 1 0 Notes 1 Wiring and cabling quality need to follow local standards regulations and la...

Страница 24: ...unication Line Showcase Operation signal Liquid tube Electromagnetic Valve Power source Cabtyre cable 1 Ground fault protector 50 Hz 220 230 240 V Shielded cable 2 Coil for Liquid tube Electromagnetic Valve Showcase Operation signal Non Voltage Contact Shielded cable 2 Red White Green Black Gray No Use No Use STP cable Shielded Twisted Pair 3 STP cable Shielded Twisted Pair 3 User System User Syst...

Страница 25: ... of rainwater is possible Securely fasten the panels after work Caution Use a cable bundling tie to eliminate wire slack without touching the sheet metal Power line and communication line connect to Refrigeration Unit through conduit STP cable Shielded Twisted Pair Cable bundling tie Always thread wires through the rectangle hole furnished at the bottom of the electrical box 01 OCU CR200VF5 indd 2...

Страница 26: ...te External communication Inverter communication Reset Alarm Check Ambient temperature sensor Split cycle outlet temperature sensor Gas cooler outlet temperature sensor Unit outlet temperature sensor Suction gas temperature sensor Discharge gas temperature sensor Low pressure sensor Intermediate pressure sensor High pressure sensor Electrical circuit diagram Standard electrical wiring diagram Elec...

Страница 27: ... solenoid valve Adjusting refrigerant amount solenoid Valve Ground fault protector Liquid tube electromagnetic valve Compartment temperature adjustment thermostat High pressure switch Control terminal base Factory wiring Local wiring Compressor control X1 Operation protection X2 External alarm X3 to X5 Electromagnetic valve X6 Operation signal 2 Cautions 1 Connect the grounding wire at the indicat...

Страница 28: ...eater must be turned ON for 6 hours or longer before operating the compressor for avoiding oil forming at starting With the operation switch on the refrigeration unit side OFF and the ground fault protector ON wait for 6 hours or longer before turning ON the operation switch Turning the ground fault protector ON causes power to be applied to the crankcase heater Do not touch by hand Protection of ...

Страница 29: ...y occurs in the refrigeration unit an alarm LED Red lights up or blinks and the cause of abnormality is displayed digitally by an error code Switch and Indication CRD1 EN PCB Slide switch SW14 AUTO FORCED Slide switch SW15 CONTROL CHECK 8P DIP switch SW13 Rotary switch SW11 7 segment LED CHECK Yellow LED ALARM Red LED Lights up or blinks when abnormality alarm is activated UP and DOWN buttons 01 O...

Страница 30: ...etting is also required 3 8P DIP switch SW13 The following functions can be selected Change setting as required Switch setting at factory shipment is No 2 ON other No 1 No 3 No 8 OFF SW13 Function with ON Remarks No 1 Evacuation No 3 4 5 6 7 8 OFF SW15 CHECK 2 Always ON 3 Always OFF 4 5 6 7 Back mode 2 No 1 3 4 5 6 8 OFF 8 Back mode 1 No 1 3 4 5 6 7 OFF CONTROL CHECK AUTO FORCED ON 01 OCU CR200VF5...

Страница 31: ...0 to 4 15 2 34 2 26 0 90 1 36 4 Freezer ice 18 to 20 30 1 52 1 42 0 24 1 18 Lim value Lowest low pressure to cause the compressor to stop Lim value OFF value Diff value 4 Target Low Pressure confirm and adjustment Turn ON the 8P DIP switch SW13 No 8 Turn OFF the 8P DIP switch SW13 No 1 and No 3 No 7 Set the rotary switch SW11 to ON The 7 segment LED displays ON value To change the ON value press o...

Страница 32: ...ry 3 seconds Indicates Lo when the low pressure is below 0 00MPa Indicates H at the end to identify the high pressure 2 Alarm occurred Low pressure MPa high pressure MPa Error content is displayed repeatedly E g 3 Method of fixing indication of low pressure Pressing button during normal operation fixes the low pressure display for 10 minutes Pressing button again cancels the fixed display However ...

Страница 33: ...ture C ALM HISTORY Alarm history error code display E Error code Latest 50 items Older data erased pressing Older data pressing Newer data Back mode 1 ON OFF ON ON value setting 0 76 to 5 00 MPa pressing Up the set value pressing Down the set value OFF OFF value setting 0 68 to 4 92 MPa OPERATION MODE Diff value setting 0 08 to 1 84 MPa STANDARD SETTING Forced stopping time setting 30 sec to 180 s...

Страница 34: ... the low pressure becomes below OFF value and finally stops when the low pressure reaches below the Lim value Lim value OFF value Diff value For the setting of Diff value refer to Low Pressure Setting of Setting and Indication Short Cycle Prevention Control After the compressor has been stopped and even the pressure becomes higher than the ON value stopping continues for the forced stopping time 3...

Страница 35: ...ith an error indication For the method of resuming resetting compressor operation refer to the Explanation of Abnormality Alarm in About Alarms 2 Open condition of discharge gas temperature sensor gas cooler outlet temperature sensor split cycle outlet temperature sensor unit outlet temperature sensor and ambient temperature sensor Compressor stops with an error indication For the method of resumi...

Страница 36: ...F cycle to be 10 minutes or longer The main cause of short cycle operation is inappropriate pressure setting on CR1 EN PCB suction filter clogging and unbalance of cooling capacity and load When a cooling coil is used incorrect attachment position of the compartment temperature sensor cold air blow directly hit the sensor would become a problem in addition to the above Review the sensor position C...

Страница 37: ...and OFF value according to the purpose of operation Refer to the Low Pressure Setting shown in the Setting and Indication of the Control PCB When charging refrigerant while ambient temperature is 25 C or below check superheat during summer season The guideline of high pressure and intermediate pressure against ambient temperature is as shown in Table 3 and 4 Ambient temperature can be checked in t...

Страница 38: ...f an Alarm System This refrigeration unit has a variety of protection devices for securing safety When the ground fault protector or other protection device is activated and the alarm system or temperature control system is insufficient cooling operation is stopped for many hours thereby damaging the food items To enable prompt actions at such time an alarm system or temperature control system sho...

Страница 39: ...uto recovery Refrigerant flood back alarm E32 No Auto Recovery when the difference between evaporating temperature and suction gas temperature is 5 K or over Unit outlet temp sensor abnormal E57 Yes Stop Operate either ground fault protector operation switch or controller Gas cooler outlet temp sensor abnormal E59 Yes Stop Inverter abnormal 1st to 9th time E60 No Stop for 60 sec and then Auto Reco...

Страница 40: ...request full inspection particularly at 1 Commissioning 2 Scheduled inspection 3 System maintenance etc Inspection items Replacement parts Inspection content Replacement guideline System overall Each part temperature 1 Pressure condition should match the cooling temperature 2 Temperature of each part must be normal 3 No abnormality exists in the installed condition Compressor Abnormal sound abnorm...

Страница 41: ...l remaining in the refrigerant circuit At such time also remove the expansion valve electronic expansion valve 4 When replacing the compressor do not apply power to the crankcase heater while it is removed from the compressor Be sure to shut off the power It may lead to fire 5 To avoid current leak accident install the components cover electric parts etc removed during inspection and service and a...

Страница 42: ...htly contacting the compressor 4 Apply evacuation from both the high pressure and low pressure service valves Method of Clearing Alarm History Operate the rotary switch knob and DIP switch 1 Align the rotary switch knob with DIS Discharge gas temperature is displayed 2 Turn ON the DIP switch SW13 7 3 Press button Entire content of Alarm History is cleared 4 Turn OFF the DIP switch SW13 7 5 Align t...

Страница 43: ... abnormal open 1 Check the connection of 2P5U inlet connector of the control PCB 2 Check the resistance value of the suction gas temperature sensor E10 Discharge gas temperature abnormal 1st to 2nd time Discharge gas temperature exceeded 118 C and caused abnormality stop Or discharge temp sensor shorted Follow the procedure shown in Failure diagnosis of abnormal discharge gas temperature 1 Investi...

Страница 44: ...r abnormality occurred in the power supply 3 Replace the inverter PCB E72 Inverter Over Current 10th time Over Current Inverter Output Current 1 Check the cause of overload operation 2 Check the connection line between the inverter PCB and the compressor 3 Check whether abnormality occurred in the power supply 4 Replace the inverter PCB E74 Inverter Over Load 10th time Over Current Inverter Input ...

Страница 45: ...such a case check the problem position and apply appropriate actions in the sequence shown below Failure Diagnosis Checking the refrigeration cycle operation condition 1 Isn t the refrigerant quantity insufficient Refer to the Adjustment of Refrigerant Quantity of Refrigeration Unit in the Adjustment during Operation 2 Isn t the suction gas temperature exceeding the limit 3 Isn t the low pressure ...

Страница 46: ...noise Fan motor bearing failure is the cause Electronic expansion valve MOV3 Operation Check 1 Align the rotary switch knob with DIS and check the discharge gas temperature of the compressor 2 Set the DIP switch SW13 5 to ON and rotary switch knob to ON valve opening fixed mode and set the electronic expansion valve opening to 450 steps At this time check that discharge gas temperature slowly goes...

Страница 47: ...s temperature sensor Measure the resistance while the connector is disconnected from the control PCB and check if the temperature is normal by using the following table Relationship between sensor temperature and resistance value Temperature C 20 30 40 50 60 70 80 90 100 110 120 Resistance value kΩ 70 13 45 05 29 67 20 00 13 79 9 71 6 97 5 09 3 77 2 84 2 16 In the table above when the temperature ...

Страница 48: ...n failure of an electronic expansion valve is questioned always check the resistance value of the electronic expansion valve before replacing the control PCB Measurement Position Resistance Value Between connector 1 6 185 Ω 18 Ω Between connector 2 6 185 Ω 18 Ω Between connector 3 6 185 Ω 18 Ω Between connector 4 6 185 Ω 18 Ω Ambient temperature 20 C Caution Resistance measurement method Contact t...

Страница 49: ...compressor Check the winding resistance of the compressor 0 97 Ω to 1 01 Ω AT 25 C indicates no problem Replace the compressor Failure of an electric component other than compressor Check the insulation resistance between each terminal of the INV EN PCB and ground G terminal Less than 1 MΩ indicates insulation failure of the INV EN PCB Replace the INV EN PCB Be sure to eliminate the cause of the f...

Страница 50: ... the power supply facility Failure of the INV EN PCB When the supplied voltage to the refrigeration unit is in the range of 220V 22 V 230V 23 V 240 V 24 V check if any abnormality exists in the appearance or component chipping of the INV EN PCB Replace the INV EN PCB 1 Check if any difference exists between the motor current of the compressor and the current value displayed on the CRD1 EN PCB 2 No...

Страница 51: ...EN 51 NOTE 01 OCU CR200VF5 indd 51 01 OCU CR200VF5 indd 51 2018 12 28 15 17 16 2018 12 28 15 17 16 ...

Страница 52: ... panasonic europe com Printed in Japan D0517 21018 80264179396002 Sales company in EU Panasonic Appliances Air Conditioning Europe PAPAEU Panasonic Marketing Europe GmbH Hagenauer Str 43 65203 Wiesbaden Germany Authorized representative in EU Panasonic Testing Centre Panasonic Marketing Europe GmbH Winsbergring 15 22525 Hamburg Germany Sales company in Australia Hussmann Australia Pty Limited 66 G...

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