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Panasonic OCU-CR400VF8 Service Manual
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Panasonic OCU-CR400VF8 Service Manual

Panasonic OCU-CR400VF8 Service Manual

Outdoor type refrigeration unit
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Summary of Contents for Panasonic OCU-CR400VF8

  • Page 2 T able of Contents Service Piping (Optional Accessories) Service Valve Operation Method Service Pipe Connection/Disconnection Method Evacuation Mode Refrigerant Releasing Procedure Airtight T est Procedure Vacuum Pump Attachment and Evacuation Procedure Refrigerant Charging Procedure Gas Leak Repair Procedure Compressor Replacement Procedure Oil Re Procedure Filter Dryer...
  • Page 3 Service piping components are required when connecting the refrigeration unit and vacuum pump, cylinders, etc. during installation. Use these components to connect to locally procured components. Locally procured components SPK-TU125 has a bent part here. Service/Maintenance connection Joint valve (Swagelok, etc.) Joint (Swagelok, etc.) Packing (Service piping)
  • Page 4 1. Location of service valves and access ports Front of refrigeration unit Detail of access ports location 2. Method of operating service valves The service valves fall into two categories types as follows. High pressure and low pressure service valve Access port Packing Gland nut...
  • Page 5 1. Preparation for attachment of the service piping 1) To front seat service valves, turn the stem of the high pressure and low pressure service valves clockwise as far as possible. Access port is closed Front seated positon Turn the stem fully clockwise 2) Attach a packing to the service piping (2 places).
  • Page 6 3. Fastening the service piping Fasten the nuts by hand up to the condition shown below, and then fasten them with a tool. Fastening torque of 13 1 N•m is recommended for the nuts. Fastening the nut too tight may deform the packing. 4.
  • Page 7 1. Evacuation mode In the evacuation mode, fully open the electronic expansion valve and solenoid valve in the refrigeration unit. If the refrigeration unit is not set to the evacuation mode, the electronic expansion valve and solenoid valve in the unit do not open, thus leading to incomplete the evacuation. Evacuation mode procedure Turn OFF the ground fault interrupter.
  • Page 8 1. Preparation for refrigerant releasing 1) Check that the access ports of the high pressure and low pressure service valve have been closed. (The front seated position) 2) Attach the service piping with the joint valve in "Closed" condition. 3) Fasten the nuts by hand up to the condition shown below, and then fasten them with a tool. Fastening torque of 13 1N m is recommended for the nuts.
  • Page 9 1. Preparation for airtight test 1) Connect the joint valve of the service piping (SPK-TU125) and the manifold gauge set exclusively for CO refrigerant by using a CO charge hose or 1/4" pipe. 2) Connect a nitrogen cylinder and the manifold gauge set by using a CO charge hose or 1/4"...
  • Page 10 1. Vacuum pump attachment and piping connection 1) Connect the joint valve of the service piping (SPK-TU125) and the manifold gauge set exclusively for CO refrigerant by using a CO charge hose or 1/4" pipe. 2) Connect a vacuum pump, CO refrigerant cylinder, and the manifold gauge set by using a charge hose or 1/4"...
  • Page 11 1. Preparation for refrigerant charging 1) Connect the joint valve of the service piping (SPK-TU125) and the manifold gauge set exclusively for CO refrigerant by using a CO charge hose or 1/4" pipe. 2) Place a CO refrigerant cylinder on a platform scale, and connect the manifold gauge set by using a CO charge hose or 1/4"...
  • Page 12 2. CO refrigerant grade Charge CO refrigerant (R744) that is compatible with the following specifications. Purity > 99.9% (volume) Moisture < 0.005% (volume) Total sulfur < 0.03ppm (weight) Inert gas (H , Ar) < 0.01% (volume) 3. Refrigerant Charging 1) With the refrigeration unit being stopped, open the joint valve and gradually charge the refrigeration unit with refrigerant in the liquid state.
  • Page 13 1. Gas leak position identification 1) When using a liquid type leak detector Identify the position where oil is leaking. Find gas leaks by applying the liquid type leak detector and checking for foaming. 2) When using a leak detector Identify the position where oil is leaking.
  • Page 14 Preparation for compressor replacement Release refrigerant in accordance with “Refrigerant Releasing Procedure”. Remove the heat insulation material of the 1st stage suction pipe (cut out bundling ties). Remove the temperature sensor of the 2nd stage discharge pipe. Remove the compressor securing bolts (3 places). Turn OFF the ground fault interrupter, when the pressure indication on reaches zero and the refrigerant release sound is no longer heard.
  • Page 15 2. Compressor removal 1) After completing the preparation for compressor replacement, cut the compressor piping at five places (1st stage suction, 1st stage discharge, 2nd stage suction, 2nd stage discharge, and oil return) by using a pipe cutter or cable cutter. The cutting position should be on the compressor side of the welded part as follows.
  • Page 16 Compressor Replacement Procedure Caution For safety purposes, always wear protective gear during operations. 3. Service compressor installation 1) Place the service compressor in its original position, and install the securing bolt, spring washer, flat washer, and protection rubber washer, etc. (three places) Note:  1. Incorrect attachment may cause excessive vibration and lead to a piping breakage failure.
  • Page 17 fill Caution In principle, there is no need for adding oil to the refrigeration unit. However, if such an operation is required when moving the refrigeration unit or for other reasons, then comply with the following procedure. (Any failure of a refrigeration unit resulting from moving is not covered by the warranty.) 1.
  • Page 18 1. Filter dryer to be applied 1) The filter dryer (one is shipped with each refrigeration unit) is a standard component. 2) In the case of replacement, use the same filter dryer shown below as the standard component. Refrigeration Unit Filter dryer Connection Filter dryer Type...
  • Page 19 Suction filter 1. Suction filter to be applied 1) The Suction filter is optional accessory. 2) In the case of replacement, use the same suction filter shown below as the optional accessory. Refrigeration Unit Suction filter Connection Model No. Diameter Model No.
  • Page 20       vibration pad...
  • Page 21 Description of AbnormalityAlarm When the ground fault protector is activated, check insulation of the equipment and circuit, eliminate the cause, and then supply power again. Anomaly item When restarting When stopped Number Alarm indication Alarm indication of times External External Note Communica- Communica-...
  • Page 22 (1) When the rotary switch (knob) is at [OPERATION] position, the digital display on the CRD2-EN PCB alternately displays low pressure, high pressure and error code (E ***). < Error Code Table > Error Meaning Cause Correction ethod code Reverse phase, Loss Reversed phase or loss of phase (2) Check the connection of power source terminal base “L1, L2, L3, N”...
  • Page 23 Error Meaning Cause code (1) Investigate the cause of unit outlet pressure anomaly. Unit outlet pressure Increased unit outlet pressure caused a anomaly (1st to 6th (2) Check for the presence of any anomalies of the unit outlet pressure unit outlet pressure anomaly. sensor.
  • Page 34 Service Parts List Master Part Code Part Name Quantity drawing No. 80428380S COMPRESSOR 80225205116000 PRESSURE SENSOR 80203511377000 PRESSURE SWITCH 80225324310000 TERMINAL BASE 80223390156000 ADHENSIVE LABEL, PET 80225324291000 TERMINAL BASE 80225324306000 TERMINAL BASE 77742329696010 RELAY, AC 220/240 V 80105334439520 CR2-EN BOARD 80105334436520 INV4-MF-EN BOARD 80105334411520...
  • Page 38 If a product failure occurs by incorrect installation, the product becomes out of warranty. Sales company in EU Panasonic Corporation Panasonic AppliancesAir Conditioning Europe Website: www.panasonic-europe.com (PAPAEU) Panasonic Marketing Europe GmbH Hagenauer Str.

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