Panasonic CZ-18BT1U + CU-KS18NKU - Manual

Page 2 - SAFETY PRECAUTIONS; Warning

• Before doing repair work, please read the " SAFETY PRECAUTIONS" carefully and fully understand them. • The precautionary items here are divided into " Warning" and " Caution" items. Items in particular which may cause death or serious injury to the service personnel if the ...

Page 4 - Table of Contents

Table of Contents SAFETY PRECAUTIONS TABLE OF CONTENTS 1. OPERATING RANGE 2. SPECIFICATIONS 2-1. Unit Specifications 2-2. Major Component Specifications 2-3. Other Component Specifications 3. DIMENSIONAL DATA 4. REFRIGERANT FLOW DIAGRAM 4-1. Refrigerant Flow Diagram 5. PERFORMANCE DATA 5-1. Temperat...

Page 5 - Page

10. CHECKING ELECTRICAL COMPONENTS 10-1. Measurement of Insulation Resistance10-2. Checking Continuity of Fuse on PCB Ass'y 11. REFRIGERANT R410A: SPECIAL PRECAUTIONS WHEN SERVICING UNIT 11-1. Characteristics of New Refrigerant R410A11-2. Checklist before Servicing11-3. Tools Specifically for R410A1...

Page 7 - Electrical Rating

< 230V > Indoor Unit CS-KS18NB4UW & CZ-18BT1U Outdoor Unit CU-KS18NKU 2-1-1. Vertical dB-AdB-A Indoor : Hi/Me/LoOutdoor : Hi Air FilterCompressorRefrigerant / Amount charged at shipment Ibs (g) Refrigerant Control 8.3 1,860 ( 1.2 to 8.3 )( 250 to 1,860 ) 17,500 5.15 ( 4,000 to 17,500 )( 1....

Page 8 - DATA SUBJECT TO CHANGE WITHOUT NOTICE.

Indoor Unit CS-KS18NB4UW & CZ-18BT1U Outdoor Unit CU-KS18NKU DATA SUBJECT TO CHANGE WITHOUT NOTICE. Remarks: Rating conditions are:Cooling: Indoor air temperature 80 °F DB / 67 °F WB Outdoor air temperature 95 °F DB / 75 °F WB Shipping Volume NetShipping Weight Ib. (kg)Ib. (kg) cu.ft (m 3 ) inch...

Page 19 - Outdoor Unit

Outdoor Unit CU-KS18NKU Control PCB Control Circuit Fuse Controls Part No. Microprocessor 250V 25A CB-CU-KS18NKU DATA SUBJECT TO CHANGE WITHOUT NOTICE. Pints (cc) WHT - BLU : BLU - RED : RED - WHT : 77.577.5 77.5 Micro F VAC External Finish Acrylic baked-on enamel finish FV50S ... 0.74 (350) -- Inte...

Page 22 - • Indoor air temp sensor

2-3. Other Component Specifications Indoor Unit CS-KS12NB41 & CZ-18BT1U CS-KS18NB4UW & CZ-18BT1U Outdoor Unit CU-KS18NKU CU-KS12NK1A CU-KS18NKUA 0 32 50 68 86 104 122 140 158 176 194 (0) (10) (20) (30) (40) (50) (60) (70) (80) (90) 40 60 80 100 120 140 160 180 200 20 50 1 0 2 3 4 5 6 7 8 9 1...

Page 23 - Indoor Unit; Center of; AA

3. DIMENSIONAL DATA Indoor Unit CS-KS12NB41 & CZ-18BT1U CS-KS18NB4UW & CZ-18BT1U 6-5/16 6-11/16 1-3/16 (30) 4-19/32 1-25/32 1-25/32 2-3/32 8-15/32 22-5/8 (575) 11-5/32 (283) 3 6 5 Less than 31/32 Less than 31/32 3-5/8 22-5/8 (575) 12-7/8 Suspension bolt pitch Suspension bolt pitch 21-1/32 (5...

Page 26 - Indoor unit; REFRIGERANT FLOW DIAGRAM; Outdoor unit

Wide tube Narrow tube Heat exchanger Indoor unit Strainer O.D.3/8"(9.52 mm) O.D.1/4"(6.35 mm) 4. REFRIGERANT FLOW DIAGRAM 4-1. Refrigerant Flow Diagram Indoor Unit CS-KS12NB41 & CZ-18BT1U Outdoor Unit CU-KS12NK1A Compressor Accumulator Wide tubeservicevalve Narrowtubeservicevalve Heat ex...

Page 28 - (3) Indoor discharge air performance chart; NOTE

Hi Fan Lo Fan Cooling Characteristics (RH : 46%, Indoor fan speed : High fan) (60Hz, 115V) (1) Low pressure performance chart (2) Operating current performance chart (3) Indoor discharge air performance chart Check each performance value in test-run mode. Electrical performance values represent a co...

Page 34 - Cooling

6. ELECTRICAL DATA 6-1. Electrical Characteristics Indoor Unit CS-KS12NB41 & CZ-18BT1U Outdoor Unit CU-KS12NK1A Indoor Unit Outdoor Unit Complete Unit Fan Motor Fan Motor + Compressor Performance at 115V Single-phase 60Hz Rating conditions Running amp. 0.21 Power input 18 12.39 1,242 Cooling 12....

Page 39 - Controller

ACL(Reset)button 1HR.TIMERbutton ON/OFFoperationbutton HIGH POWERbutton Test run mode Self-diagnostic mode Address setting mode Fig. 1 Fig. 2 Fig. 3 Tab ACL button 7. MAINTENANCE 7-1. Address Setting of the Remote Controller The address can be set in order to prevent interference between remote cont...

Page 41 - attempting to disassemble the unit.; WARNING

7-3. Disassembly Procedure 7-3-1. Remove the air intake grill. (1) Slide the 2 latches each to the corresponding arrow direction. (Fig. 1 and Fig. 2) Open downward the air intake grill located on the latch side. (2) Undo the air intake grill drop preventive hook. (Fig. 3) Undo the 2 hinges for the g...

Page 42 - There is no strap on the indicator cover.

NOTE 7-3-3. Remove the ceiling panel. (1) Open the clamp (4 locations) and remove the 2 lead wires from the clamps. (Fig. 6) (2) Remove the 4 screws fixing the corner cover (at 3 locations) and indicator cover (at 1 location). (Fig. 6) (3) Press the center 1 of the cover and remove the cover with th...

Page 50 - Compressor discharge temperature control

a. Area: Automatic capacity control b. When the temperature drops below Point A, the operation frequency is reduced by a certain proportion. c. Area: Frequency increase is prohibited. d. When the temperature reaches Point C or above, freezing prevention is ended and control is the same as in the a a...

Page 51 - -1. Precautions before Performing Inspection or Repair; : The failure mode is stored in memory even when the power is not ON.; PROCEDURE; Step 1: Press and hold the remote controller HIGH POWER button and 1

< Clock display > Test run mode Self-diagnostics mode 9. TROUBLESHOOTING (BEFORE CALLING FOR SERVICE) 9-1. Precautions before Performing Inspection or Repair NOTE After checking the self-diagnostics monitor, turn the power OFF before starting inspection or repair. High-capacity electrolytic ca...

Page 52 - INDOOR UNIT

Since the indications cover various units, the corresponding parts listed below may not be present in some models. (1) Self-diagnostics Lamps (1) DRAIN PUMP FAILURE (2) FS FAILURE (3) CHOKED DRAIN HOSE 8512-5261-99100-1 REMOTE CONTROL receiver OPERATION lamp TIMER lamp OPERATION button HIGH POWER la...

Page 53 - Normal; -3. Checking the Indoor and Outdoor Units; operation by 60 times faster than normal).; Control

(2) If the self-diagnostics function fails to operate Check the indoor unit. Is the fuse blown? Replace the controller. Replace the circuit board or the fuse. No indicators illuminate and the indoor fan does not rotate.Check the power voltage. • • Normal Blown 9-3. Checking the Indoor and Outdoor Un...

Page 54 - (3) Serial Communication Error Identification Procedure; < Check Items before Troubleshooting Serial Communication Start >

(3) Serial Communication Error Identification Procedure Refer to "Method of Self-Diagnostics" for the self-diagnostics procedure. (3-1) Condition: E01 < Before the Operation > If the lamps on the main body show the following conditions after the completion of self-diagnostics, a commun...

Page 57 - Measurement location

[Trouble symptom 3] Motor rotates for some time (several seconds), but then quickly stops, when the indoor unit operates. (There is trouble in the system that provides feedback of motor rotation speed from the motor to the indoor unit controller.) [Trouble symptom 4] Fan motor rotation speed does no...

Page 58 - DC 14V or more; Normal value

9-4-2. Outdoor Fan Motor This outdoor DC fan motor contains an internal control PCB. Therefore, it is not possible to measure the coil resistance, and the following procedure should be used to check the motor. Perform the trouble diagnosis by Test Run mode described on Installation Instructions. [Tr...

Page 59 - -5. Noise Malfunction and Electromagnetic Interference

9-5. Noise Malfunction and Electromagnetic Interference An inverter A/C operates using pulse signal control and high frequencies. Therefore, it is susceptible to the effects of external noise, and is likely to cause electromagnetic interference with nearby wireless devices. A noise filter is install...

Page 60 - CHECKING ELECTRICAL COMPONENTS; Resistance; Resistance for Electrical Parts

Insulation tester Probe Clip Ground wire Terminal plate Coppertube ormetallic part Clip Insulation tester Probe Fig. 1 Fig. 2 Fig. 3 Fig. 4 Coppertube ormetallic part Clip Insulation tester Probe Clip Insulation tester Probe Metallic part From fan motor,compressor and other parts 10. CHECKING ELECTR...

Page 61 - Remove the PCB Ass'y from the electrical

Fuse PCB Ass'y Fig. 5 Fig. 6 Fuse 10-2. Checking Continuity of Fuse on PCB Ass'y Remove the PCB Ass'y from the electrical component box. Then pull out the fuse from the PCB Ass'y. (Fig. 5) Check for continuity using a multimeter as shown in Fig. 6. 61

Page 62 - SPECIAL PRECAUTIONS WHEN SERVICING UNIT; 1-1. Characteristics of New Refrigerant R410A; Less toxic, more chemically stable refrigerant; Thus, always charge the refrigerant while it is in liquid phase.; CAUTION

11. REFRIGERANT R410A: SPECIAL PRECAUTIONS WHEN SERVICING UNIT 11-1. Characteristics of New Refrigerant R410A 11-1-1. What is New Refrigerant R410A? R410A is a new refrigerant that contains two types of pseudo-non-azeotropic refrigerant mixture. Its refrigeration capacity and energy efficiency are a...

Page 63 - Specification A

Tubing precautions Refrigerant R410A is more easily affected by dust or moisture compared with R22, thus be sure to temporarily cover the ends of the tubing with caps or tape prior to installation. Never use 0.0276" (0.7 mm)-thick copper tubing or tubing which is less than 0.0315" (0.8 mm) i...

Page 65 - 1-5. In Case of Compressor Malfunction; compressor as quickly as possible.; Length of tubing

11-5. In Case of Compressor Malfunction CAUTION Should the compressor malfunction, be sure to make the switch to a replacement compressor as quickly as possible. Use only the tools indicated exclusively for R410A. See "11-3. Tools Specifically for R410A." 11-5-1. Procedure for Replacing Comp...

Page 66 - Single valve

Valve Single valve Charge liquid refrigerant with cylinder in up-side-down position. Single valve (with siphon tube) Charge with cylinder in normal position. Liquid Valve Liquid Charging cylinder Open Refrigerant cylinder Liquid NO! CAUTION Never charge a large amount of liquid refrigerant at once t...

Page 67 - carry out repairs, then recharge the refrigerant.

Length of tubing Evacuation time Less than 33 ft. (10 m) More than 10 minutes More than 33 ft. (10 m) More than 15 minutes 11-6. In Case Refrigerant is Leaking CAUTION Never attempt to charge additional refrigerant when refrigerant has been leaking from the unit. Follow the procedure described below...

Page 68 - with the indoor unit.; Charge additional refrigerant in liquid state only.; This will cause the air conditioner to; do not use its existing tubing.; completely new tubing must be used.; out repairs. Only then should you recharge the refrigerant.

11-7. Charging Additional Refrigerant 11-7-1. When Tubes are Extended Observe the proper amount of refrigerant as stated in this service manual or the installation manual that came with the indoor unit. Charge additional refrigerant in liquid state only. 11-8. Retro-Fitting Existing Systems 11-8-1. ...

Panasonic CZ-18BT1U + CU-KS18NKU - Manual

Table of Contents:

Summary

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