Panasonic CU-PC12JKF - User Manual

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Order No. PHAAM0810040C3

Air Conditioner

Indoor Unit Outdoor Unit

CS-PC12JKF CU-PC12JKF

TABLE OF CONTENTS

PAGE PAGE

1 Safety Precautions----------------------------------------------- 3

2 Specifications ----------------------------------------------------- 5

3Features------------------------------------------------------------- 7

4 Location of Controls and Components ------------------- 8

4.1. Indoor Unit--------------------------------------------------- 8

4.2. Outdoor Unit ------------------------------------------------ 8

4.3. Remote Control -------------------------------------------- 8

5Dimensions--------------------------------------------------------- 9

5.1. Indoor Unit & Remote Control -------------------------- 9

5.2. Outdoor Unit -----------------------------------------------10

6 Refrigeration Cycle Diagram --------------------------------11

7 Block Diagram----------------------------------------------------12

8 Wiring Connection Diagram ---------------------------------13

9 Electronic Circuit Diagram -----------------------------------14

10 Printed Circuit Board-------------------------------------------15

10.1. Indoor Unit--------------------------------------------------15

10.2. Indicator Printed Circuit Board ------------------------16

11 Installation Instruction-----------------------------------------17

11.1. Select The Best Location -------------------------------17

11.2. Indoor Unit ------------------------------------------------- 18

11.3. Outdoor Unit----------------------------------------------- 21

12 Operation and Control ---------------------------------------- 25

12.1. Cooling Operation---------------------------------------- 25

12.2. Soft Dry Operation --------------------------------------- 26

12.3. Automatic Operation ------------------------------------ 27

12.4. Indoor Fan Speed Control ----------------------------- 28

12.5. Outdoor Fan Speed Control --------------------------- 29

12.6. Vertical Airflow Direction Control--------------------- 29

12.7. Horizontal Airflow Direction Control ----------------- 30

12.8. Timer Control---------------------------------------------- 30

12.9. Random Auto Restart Control ------------------------ 30

12.10. Remote Control Signal Receiving Sound ---------- 30

13 Protection Control ---------------------------------------------- 31

13.1. Restart Control (Time Delay Safety Control)------ 31

13.2. 7 Minutes Time Save Control ------------------------- 31

13.3. 60 Seconds Forced Operation------------------------ 31

13.4. Starting current Control--------------------------------- 31

13.5. Freeze Preventive Control----------------------------- 31

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This document is a service manual for the Panasonic CS-PC12JKF (Indoor Unit) and CU-PC12JKF (Outdoor Unit) air conditioner. It provides comprehensive information for experienced repair technicians, including safety precautions, specifications, features, operation and control, servicing modes, troubleshooting, disassembly and assembly instructions, technical data, and an exploded view with a replacement parts list.

Function Description:

The Panasonic CS-PC12JKF/CU-PC12JKF is an air conditioning system designed for cooling and soft dry operations. It utilizes a refrigeration cycle to transfer heat, providing a comfortable indoor environment. The system includes an indoor unit (evaporator) and an outdoor unit (condenser), connected by refrigerant piping and electrical wiring. It features various control mechanisms for temperature, fan speed, airflow direction, and timer settings, along with several protection controls to ensure safe and reliable operation.

Important Technical Specifications:

General:

Model: Indoor Unit: CS-PC12JKF, Outdoor Unit: CU-PC12JKF
Performance Test Condition: NEW JIS
Power Supply: Single phase, 50 Hz, 220V or 240V
Capacity: 3.52 kW (220V) / 3.54 kW (240V), 12000 BTU/h (220V) / 12100 BTU/h (240V)
EER: 2.91 W/W (220V) / 2.85 W/W (240V), 9.9 BTU/hW (220V) / 9.7 BTU/hW (240V)
Power Factor: 96% (220V) / 94% (240V)
Noise Level: Indoor: High: 40 dB-A, Low: 30 dB-A; Outdoor: High: 51 dB-A (220V) / High: 52 dB-A (240V)
Max Current / Max Input Power: 7.5 A / 1.73 kW
Starting Current: 29.5 A
Refrigerant: R22, 870 g (30.7 oz)
Refrigerant Oil: ATMOS M60 or SUNISO 4GDID (410 cm³)
Power Supply Cord: 15 A
Indoor Operation Range: Dry Bulb: 16-32°C, Wet Bulb: 11-23°C
Outdoor Operation Range: Dry Bulb: 16-55°C, Wet Bulb: 11-31°C

Indoor Unit:

Dimensions (H x W x D): 290 x 870 x 204 mm (11-7/16" x 34-9/32" x 8-1/16")
Net Weight: 9 kg (20 lb)
Indoor Fan: Cross-flow Fan, Induction (4-poles) motor
- Input Power: 41.7 W (220V) / 44.4 W (240V)
- Output Power: 22 W
- Fan Speed (rpm): Lo: 800, Me: 940, Hi: 1080
- Airflow: Lo: 7.4 m³/min (262 ft³/m), Me: 8.7 m³/min (307 ft³/m), Hi: 10.0 m³/min (353 ft³/m)
Heat Exchanger: Aluminium (Pre Coat) Slit Fin, 2 rows x 15 stages x 21 FPI, 610 x 315 x 25.4 mm
Air Filter: Polypropylene, One-touch type
Drain Hose: Inner Diameter: 16 mm, Length: 550 mm

Outdoor Unit:

Dimensions (H x W x D): 540 x 780 x 289 mm (21-9/32" x 30-23/32" x 11-13/32")
Net Weight: 35 kg (77 lb)
Compressor: Rotary (1 cylinder) rolling piston type, Induction (2-poles) motor, 1.0 kW
Outdoor Fan: Propeller Fan, PP Resin, Induction (6-poles) motor
- Input Power: 78.5 W (220V) / 88.6 W (240V)
- Output Power: 52 W
- Fan Speed (rpm): Hi: 890 (220V) / 915 (240V)
- Airflow: Hi: 33.2 m³/min (1172 ft³/m) (220V) / 34.2 m³/min (1207 ft³/m) (240V)
Heat Exchanger: Aluminium (Blue Coat) Corrugated Fin, 1 row x 24 stages x 17 FPI, 22 x 508 x 708.4 mm
Piping:
- Pipe Diameter (Liquid/Gas): 6.35 mm (1/4") / 12.70 mm (1/2")
- Standard Length: 7.5 m (24.6 ft)
- Length Range (min-max): 3-15 m (9.8-49.2 ft)
- I/D & O/D Height Difference: 5 m (16.4 ft)
- Additional Gas Amount: 10 g/m (0.1 oz/ft) for lengths over 7.5 m

Usage Features:

Long Installation Piping: Supports piping up to 15 meters, offering flexibility in installation.
Easy to Use Remote Control: Allows for convenient adjustment of settings.
Cooling Operation: Standard cooling function with temperature settings from 16°C to 30°C.
Soft Dry Operation: Gentle dehumidification to prevent overcooling, with temperature settings from 16°C to 30°C.
Automatic Operation: Automatically determines the operation mode (Cooling or Soft Dry) based on intake air temperature. Setting temperatures can be adjusted by ±2°C from the standard.
Indoor Fan Speed Control: Offers Hi, Me, Lo fan speeds, and an Auto mode that adjusts speed between Hi and Me. Deodorizing control is activated in Auto mode.
Outdoor Fan Speed Control: Operates at a single speed, starting and stopping simultaneously with the compressor.
Vertical Airflow Direction Control: Louver swings up and down in Auto mode. Can be manually adjusted.
Horizontal Airflow Direction Control: Manually adjustable.
Timer Control: 24-hour timer setting for ON/OFF operations.
Random Auto Restart Control: Automatically restarts the unit after a power failure, with a random time delay (3 to 4 minutes) to prevent power surges.
Remote Control Signal Receiving Sound: Provides audible feedback for remote control signals.

Maintenance Features:

Safety Precautions: Detailed warnings and cautions for technicians, emphasizing the importance of proper earthing, correct wiring, and handling of refrigerant. High voltage areas are highlighted for safety.
Servicing Mode:
- Auto OFF/ON Button: Used for Auto operation (limited function), Test Run operation (for pump down/servicing), and Various Setting Mode (to toggle remote control receiving sound and change remote control transmission code).
- Remote Control Button Functions: Includes SET (to check/store transmission code), CLOCK (to change time format), RESET (to restore factory defaults), TIMER ▲ (to change LED intensity), and TIMER ▼ (to change display from °C to °F).
Troubleshooting Guide: Provides methods for diagnosing issues related to the refrigeration cycle system and compressor malfunctions, including symptoms for insufficient refrigerant, clogged capillary tube, short circuit, heat radiation deficiency, inefficient compression, and locked compressor.
Disassembly and Assembly Instructions: Step-by-step procedures with illustrations for removing and installing indoor electronic controllers, control boards, indoor fan motor, and cross-flow fan.
Pipe Insulation: Instructions for insulating pipe connections and increasing insulation thickness for drain hoses in rooms where dew may form.
Cutting and Flaring the Piping: Detailed steps for cutting pipes, removing burrs, and flaring, with warnings about improper flaring.
Wire Stripping and Connecting Requirement: Guidelines for proper wire stripping and connection to terminal boards, ensuring full conductor insertion and no loose strands.
Evacuation of the Equipment: Procedure for evacuating air from the indoor unit and pipes during installation to prevent refrigerant gas leakage.
Protection Control:
- Restart Control (Time Delay Safety Control): Delays compressor restart for 3 minutes after a stop to protect the compressor.
- 7 Minutes Time Save Control: Prevents compressor restart for 7 minutes if the intake air temperature falls between compressor ON and OFF temperatures.
- 60 Seconds Forced Operation: Forces compressor operation for 60 seconds to allow refrigerant oil to return to the compressor.
- Starting Current Control: Limits starting current.
- Freeze Preventive Control: Prevents indoor heat exchanger from freezing by increasing fan speed and stopping the compressor if the indoor heat exchanger temperature drops too low.
- Compressor Reverse Rotation Protection Control: Prevents compressor reverse rotation.
- Dew Prevention Control: Prevents dew formation at the indoor unit discharge area.
Indoor Fan Motor RPM Abnormal Control: Monitors fan motor RPM and stops/restarts the fan if abnormal speeds are detected. If errors persist, the unit stops operation.