Page 2 - Important; CAUTION
Please Read Before Starting This air conditioning system meets strict safety and operatingstandards. As the installer or service person, it is an importantpart of your job to install or service the system so it operatessafely and efficiently. For safe installation and trouble-free operation, you mus...
Page 5 - WHAT IS IN THIS MANUAL; diagnostic chapter to help you find the; HOW TO USE THIS MANUAL; You can use this manual both as a reference
– 5 – SM830076 WHAT IS IN THIS MANUAL Introduction: Read Me First! This manual will help you understand and service the air conditioner. To help you find the information you need,we have divided it into 5 main sections. Each section is divided into chapters with charts, tables and explana-tions to h...
Page 7 - Unit Specifications
1 2 3 4 – 7 – SM830076 1. Specifications 1-1 Unit Specifications MODEL No. Indoor Unit XHS2432 Outdoor Unit CH2432 POWER SOURCE 230 - 208 V / 1 Phase / 60 Hz PERFORMANCE Cooling Heating Capacity* BTU / h 24,000 23,400 25,000 24,300 (17 ° F)** 16,400 15,800 Moisture removal (High) Pints / h 8.6 8.4 —...
Page 19 - Dimensional Data
1 2 3 4 – 19 – SM830076 1. Specifications 1-4 Dimensional Data (A) Indoor Unit: XHS2432 33-27/32 3-15/16 29-29/32 19-11/16 19-11/16 11-23/32 1-3/16 8-1/16 6-1/2 1/2 1/2 1-7/8 33-27/32 32-9/32 (Ceiling opening) 32-9/32 (Ceiling opening) 28-3/4 (Suspention bolt pitch) Grille center 23-7/32 (Suspention...
Page 23 - Temperature
1 2 3 4 – 23 – SM830076 1. Specifications 1-5 Refrigerant Flow Diagram Outdoor Unit: CH2432 Indoor Unit: XHS2432 1-6 Operating Range Temperature Indoor Air Intake Outdoor Air Intake Cooling Maximum 95 ° F DB, 71 ° F WB 115 ° F DB Minimum 67 ° F DB, 57 ° F WB 23 ° F DB Heating Maximum 80 ° F DB, 67 °...
Page 25 - Section; Processes and functions; PROCESSES AND FUNCTIONS
1. Specifications 1 2 3 4 Section – 25 – SM830076 2. Processes and functions 2. PROCESSES AND FUNCTIONS 2-1 Room Temperature Control .......................................................................... 26(A) Cooling .................................................................................
Page 26 - Chart Summary and Explanations; Once the compressor starts, it keeps running for 5 minutes.; ON; OFF; Room Temperature Control
1 2 3 4 Section – 26 – SM830076 2. Processes and functions Fig. 1 Chart Summary and Explanations ❑ Once the compressor starts, it keeps running for 5 minutes. ❑ Once the compressor stops, it will not start running again for 3 minutes. ❑ If you change the operation mode (HEAT, COOL, or FAN) during th...
Page 27 - Thermo ON: When room temperature is –2°F below the set temperature T ̊.
1. Specifications 1 2 3 4 Section – 27 – SM830076 2. Processes and functions (B) Heating Chart Summary and Explanations ❑ Once the compressor starts, it keeps running for 5 minutes. ❑ Once the compressor stops, it will not start running again for 3 minutes. ❑ If you change the operation mode (HEAT, ...
Page 29 - Chart Explanations and notes; Chart Explanations and notes
1. Specifications 1 2 3 4 Section – 29 – SM830076 2. Processes and functions Fig. 4 2-3 Automatic Fan Speed (Indoor Unit) (A) Cooling By pressing the FAN SPEED button on the remote controller, the fan speed can be set atone of four steps: AUTO., HI., MED., or LO. When set at AUTO. the indoor unit fa...
Page 30 - Outdoor Fan Speed Control; Cooling; Outdoor unit coil; less than 77°F; Outdoor coil; less than 57°F; Heating
1 2 3 4 Section – 30 – SM830076 2. Processes and functions 2-4 Outdoor Fan Speed Control To optimize the performance of air conditioner, the outdoor fan speed is selectedautomatically according to the outdoor temperature. ❑ Note that in both Cooling and Heating modes, the fan comes on at first at hi...
Page 33 - This function prevents the air conditioner from overloading.
1. Specifications 1 2 3 4 Section – 33 – SM830076 2. Processes and functions Fig. 10 2-7 Overload Protection (Heating) This function prevents the air conditioner from overloading. Chart Explanations and notes ❑ This chart shows how the outdoor fan speed and the electronic refrigerant control valvere...
Page 34 - Discharge Temperature Control (Cooling and Heating); Chart Summary and Explanations; Discharge temperature is sensed by TH8 (discharge gas sensor).
1 2 3 4 Section – 34 – SM830076 2. Processes and functions 2-8 Discharge Temperature Control (Cooling and Heating) This function prevents the compressor motor from burnout by overheating. Fig. 11 Chart Summary and Explanations ❑ Discharge temperature is sensed by TH8 (discharge gas sensor). ❑ When t...
Page 35 - Auto. Mode for Automatic Heating/Cooling Switching; COOLING
1. Specifications 1 2 3 4 Section – 35 – SM830076 2. Processes and functions 2-9 Auto. Mode for Automatic Heating/Cooling Switching ❑ When the AUTO mode is selected, the microprocessor calculates the differencebetween the set temperature and the room temperature, and automatically switchesto the COO...
Page 36 - Chart summary and Explanations
1 2 3 4 Section – 36 – SM830076 2. Processes and functions Chart summary and Explanations ❑ This chart shows how the Operation Mode (COOLING or HEATING) is determined by themicroprocessor taking the room temperature into consideration. It also shows thetemperature points at which the cooling or heat...
Page 39 - Automatic Restart after Power Interruption; This air conditionner has a power failure recovery function.
1. Specifications 1 2 3 4 Section – 39 – SM830076 2. Processes and functions (B) AUTO Control Mode When the Compressor has stopped while in AUTO mode, the 4-way valve switches on(heating) or off (cooling) within 1 minute according to the following conditions: Fig. 16 2-12 Automatic Restart after Pow...
Page 40 - Electronic Expansion Valve; Model
1 2 3 4 Section – 40 – SM830076 2. Processes and functions 2-13 Electronic Expansion Valve ❑ This valve allows very precise and smooth control of the amount of refrigerant flow in thesystem. Since the valve is operated by a step motor, the control circuits can open orclose it in very exact amounts, ...
Page 41 - Compressor Current Detection Circuit; Overload Protection
1. Specifications 1 2 3 4 Section – 41 – SM830076 2. Processes and functions 2-15 Compressor Current Detection Circuit ❑ The Compressor Current Detection Circuit detects the compressor current and,depending on the current range, can stop the compressor motor so it will not bedamaged by overcurrent. ...
Page 42 - Electronic Expansion Valve Control; Contents and Order of control
1 2 3 4 Section – 42 – SM830076 2. Processes and functions 2-16 Electronic Expansion Valve Control The circulation volume of the refrigerant is controlled by a pulse type electronic control valve.When the power is switched ON, the opening degree of the electronic control valve iscontrolled between 9...
Page 43 - Voltage Detection Control
1. Specifications 1 2 3 4 Section – 43 – SM830076 2. Processes and functions 2-17 Voltage Detection Control When the power voltage falls below 160 V or rises above 260 V, operation lamp and stand-bylamp flash alternately to protect the compressor and electrical components.
Page 46 - Indoor Unit; MOV; • Electric Wiring Diagram; FMI
3. Electrical data 1 2 3 4 Section – 46 – SM830076 3-1 Indoor Unit 1 1 1 1 1 XHS2432, XHS3632 TH1 TH2 TH3 2 1 2 1 2 1 3 1 2 1 LM P S Connector 3P(WHT) Connector 9P(WHT) MOV 3 1 FS 45 3 3 1 21 2 1 3 1 3 1 3 1 3 1 4 3 5 71 3 23 1 23 1 123 4 5 6 7 8 9 1 S P 23 4 5 67 8 9 12 3 12 3 1 Power Line To Outdo...
Page 47 - • Schematic Diagram
3. Electrical data 1 2 3 4 Section – 47 – SM830076 3-1 Indoor Unit 1 1 1 1 1 XHS2432, XHS3632 • Schematic Diagram S 854-2-5268-772-00-0 (XHS) FMI 2 1 2 1 2 1 2 1 3 1 2 1 3 2 3 4 5 1 2 34 1 TR1 4P-U2 4P-U1 Indoor Coil Indoor Coil Room Thermistor E2 TH1 TH2 TH3 FS CR-THS2432 Controller E1 3 1 1 1 1 R ...
Page 48 - Outdoor Unit
3. Electrical data 1 2 3 4 Section – 48 – SM830076 3-2 Outdoor Unit 1 1 1 1 1 CH2432 1 3 5 2 4 6 • Electric Wiring Diagram TH6 TH7 TH8 2 1 2 1 2 1 3 1 63PH 3 1 3 1 3579 1 3 1 1 3 BLK BLK BLK BLK WHT WHT TR AC 14V FMO CM PNK BRN GRY GRY WHT VLT YEL CT B A UV W RS T 3 1 32 2 1 2 1S P 2 1 2 1 S P Conne...
Page 53 - Service procedures; SERVICE PROCEDURES
4. Service procedures 1 2 3 4 Section – 53 – SM830076 4. SERVICE PROCEDURES 4-1 Troubleshooting ............................................................................................. 54 (1) Check before and after Troubleshooting ................................................ 55 (2) General ...
Page 54 - Troubleshooting; This section explains:; What the LED codes mean
4. Service procedures 1 2 3 4 Section – 54 – SM830076 4-1 Troubleshooting This section explains: This unit is made to be trouble free, and not need much service. However, with time, movingparts wear out, electronic components break down, and sometimes misuse damages the unit.The purpose of this sect...
Page 55 - Check before and after Troubleshooting; . Check power supply wiring; Check power supply; Check that power is being supplied.; . Check the lead wires and connectors in indoor and outdoor units.; Check that the sheath of lead wires is not damaged.
4. Service procedures 1 2 3 4 Section – 55 – SM830076 (1) Check before and after Troubleshooting Many problems may happen because of wiring or power supply problems, so you shouldcheck these areas first. Problems here can cause false results in some of the other tests, andso should be corrected firs...
Page 56 - General Troubleshooting Flow Chart: Diagnosis and Remedy
4. Service procedures 1 2 3 4 Section – 56 – SM830076 (2) General Troubleshooting Flow Chart: Diagnosis and Remedy When you have found a major problem, such as refrigerant not flowing in the system orreduced air circulation, come to this section and find the box listing the problem. Connectedto the ...
Page 58 - Meanings of alarm messages
4. Service procedures 1 2 3 4 Section – 58 – SM830076 (3) Meanings of alarm messages If an error occurred in the air conditioner, the error condition is presented by indicating theerror code in the wired remote controller display or by the combination of lamp statuses foroperation, timer and heat st...
Page 60 - NOTE; * REFRIGERANT SHORTAGE
4. Service procedures 1 2 3 4 Section – 60 – SM830076 (4) LED Indication on the Outdoor Unit’s P.C.B. Ass’y If something goes wrong with the outdoor unit, LED lamps on the outdoor P.C.B. Ass’y lightup to show the cause of the trouble, in addition to the Alarm message on the remotecontroller. LED 2 o...
Page 61 - Symptoms and parts to inspect
4. Service procedures 1 2 3 4 Section – 61 – SM830076 (5) Symptoms and parts to inspect 1) Symptom: LCD on the remote controller does not display and remote controller does not operate. No No No No No No No No No No Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Start Replace the indoor unit PCB. Is there ...
Page 62 - LCD on the remote controller displays “CHECK E01”.
4. Service procedures 1 2 3 4 Section – 62 – SM830076 2) Symptom: LCD on the remote controller displays “CHECK E01”. (Unusual communication between remote controller and indoor unit.) 3) Symptom: LCD on the remote controller displays “CHECK E02”. (Unusual communication between remote controller and ...
Page 63 - Symptom: LCD on the remote controller is displaying “CHECK E04”.
4. Service procedures 1 2 3 4 Section – 63 – SM830076 4) Symptom: LCD on the remote controller is displaying “CHECK E04”. (Unusual communication between the indoor and outdoor units.) 5) Symptom: LCD on the remote controller is displaying “CHECK E05”. (Unusual communication between the indoor and ou...
Page 65 - Symptom: LCD on the remote controller displays “CHECK P01”.
4. Service procedures 1 2 3 4 Section – 65 – SM830076 9) Symptom: LCD on the remote controller displays “CHECK P01”. (Indoor fan protection thermostat operation warning) No No No Yes Yes Yes 1146_THS_I Start Is there 230-208 V AC between S4 and T20-3 on the indoor unit PCB? Is there 230-208 V AC bet...
Page 66 - 0) Symptom: LCD on the remote controller displays “CHECK P02”.
4. Service procedures 1 2 3 4 Section – 66 – SM830076 10) Symptom: LCD on the remote controller displays “CHECK P02”. (Compressor / outdoor fan protection thermostat operation warning / powersupply voltage abnormality) Yes Yes No Yes No No 1147_THS_I Start Is the outdoor fan wire winding protection ...
Page 67 - 1) Symptoms: LCD on the remote controller displays “CHECK P03”.
4. Service procedures 1 2 3 4 Section – 67 – SM830076 11) Symptoms: LCD on the remote controller displays “CHECK P03”. (Alarm for unusual discharge temp. of compressor) 12) Symptom: LCD on the remote controller displays “CHECK P04”. (High-pressure switch activation warning) 0343_M_I Start Unusual di...
Page 68 - 3) Symptom: LCD on the remote controller displays “CHECK P05”.
4. Service procedures 1 2 3 4 Section – 68 – SM830076 13) Symptom: LCD on the remote controller displays “CHECK P05”. (Negative phase detection operation warning) 14) Symptom: LCD on the remote controller displays “CHECK E15”. Yes No No No Yes Yes 0345_M_I Start Check the power breaker etc. and repa...
Page 69 - 5) Symptom: LCD on the remote controller displays “CHECK E16”.
4. Service procedures 1 2 3 4 Section – 69 – SM830076 15) Symptom: LCD on the remote controller displays “CHECK E16”. No No No Yes Yes 0647_M_S Start Repair the wiring. When the group of the units are installed, is there any mis-cross between inter unit control wiring and refrigerant tubing? Confirm...
Page 71 - Procedures When a Specific Component Does Not Work; Indoor fan does not operate.
4. Service procedures 1 2 3 4 Section – 71 – SM830076 (6) Procedures When a Specific Component Does Not Work 1) Indoor fan does not operate. No Yes Is fan motor capacitornormal ? Is there voltage outputof P.C.B. Ass'y for fanmotor ? • Check resistance of fan motor winding. Replace the fan motor. Rep...
Page 72 - Compressor motor does not operate.
4. Service procedures 1 2 3 4 Section – 72 – SM830076 3) Compressor motor does not operate. 4) Outdoor fan does not operate. No Yes Does compressor motor magnetic contactor (52C) actuate ? Replace the compressor motor magnetic contactor. Check resistance of compressor motor winding. Replace the comp...
Page 73 - (E) Check the remote controller itself for correct operation.
4. Service procedures 1 2 3 4 Section – 73 – SM830076 (7) Service Functions of Optional Wired Remote Controller(Temperature displayed on the screen is not °F but °C.) From the remote controller you can control both the operation and settings of the unit as wellas perform several useful service check...
Page 74 - Use the test run procedure
4. Service procedures 1 2 3 4 Section – 74 – SM830076 (B) Use the test run procedure ❏ The purpose of the test run function is to let you control the operation of the unitdirectly without turning the unit on or off by thermostat. As indicated in the followingprocedure, be sure to stop test run opera...
Page 75 - (C) Check the sensor temperature readings; Follow this procedure to display the temperature of each sensor:; Each time you press the
4. Service procedures 1 2 3 4 Section – 75 – SM830076 (C) Check the sensor temperature readings The air conditioner has thermo sensors which are used to control the unit. ❏ Each sensor has an address which is made up of the indoor unit address, and thesensor address. The indoor unit address is used ...
Page 76 - Resetting the remote controller display to previous mode.; Find out about past service problems; This function is usable even if the unit is not working.
4. Service procedures 1 2 3 4 Section – 76 – SM830076 NOTE Location of Sensor (Themistor) Relationship between the sensor address and the location of sensor Sensor Address(CODE No.) Indoor Unit 01 — 02 TH1 Indoor air suction Temp. 03 TH2 Indoor coil Temp. (E1) 04 TH3 Indoor coil Temp. (E2) 05 — 06 —...
Page 77 - MODE; NOTE Pressing CL (Clear) button will clear
4. Service procedures 1 2 3 4 Section – 77 – SM830076 This picture shows the service check display. SERVICE R.C. No. CHECK UNIT No. No. CODE 0358_M_I CODE No. No. UNIT No. 1–1 Alarm message RefrigerantCircuit No. c . A maximum of 4 alarm messages can be accessed by pressing either SET TEMP button or...
Page 78 - To erase accessed data, press the CL button.
4. Service procedures 1 2 3 4 Section – 78 – SM830076 Never press CL (clear) button unless you want to erase the accessed data in memory. Followthe procedure below only when erasing is necessary. ❏ To erase accessed data, press the CL button. ❏ When erasing is finished,“----” mark appears on the con...
Page 79 - Execute the auto. address operation; Set CODE No. A1 with
4. Service procedures 1 2 3 4 Section – 79 – SM830076 (F) Execute the auto. address operation ❏ Auto. address operation is executed by pressing the A. ADD (S1) button of outdoorunit’s PCB usually.For your convenience it can be executed by remote controller also. a Press the TEST / CHK and ( ) button...
Page 80 - Confirm and change the indoor unit address
4. Service procedures 1 2 3 4 Section – 80 – SM830076 (G) Confirm and change the indoor unit address ❏ The purpose of the above function is to let you confirm the indoor unit address afterthe auto. address operation, and change the indoor unit address if it is needed. a Press the TEST / CHK and ( ) ...
Page 81 - Set the required new indoor unit’s No. by pressing the; changes from flashing to ON state.; If you made a mistake, press the CL button.; to
4. Service procedures 1 2 3 4 Section – 81 – SM830076 e Set the required new indoor unit’s No. by pressing the , ( ) button. f Press the SET button.UNIT No, SET DATA (0008) and SETTING changes from flashing to ON state. g If you made a mistake, press the CL button. h Finally, press the TEST / CHK bu...
Page 82 - Change the shift temperature in heating mode; Select the CODE No. 06 with; change from flashing to ON state.
4. Service procedures 1 2 3 4 Section – 82 – SM830076 (H) Change the shift temperature in heating mode ❏ If the indoor unit is installed at high location (ex. ceiling level), the thermostat tends to turn off atheating mode because of the hot air temperature around ceiling level. In order to solve th...
Page 83 - Set the indoor unit address; with the indoor unit temporarily.
4. Service procedures 1 2 3 4 Section – 83 – SM830076 ( I ) Set the indoor unit address ❏ This function is usable if the auto. address operation is not available.Indoor unit address can be set one by one by remote controller in such case. 1) In case of group control, branch wiring for group control ...
Page 84 - Select the CODE No. 13 to set the indoor unit No. with the; and SET DATA (0004) change from flashing to ON
4. Service procedures 1 2 3 4 Section – 84 – SM830076 d Set the No. of R. C. which you want to set with , ( ) button. e Press the SET button.UNIT No., CODE No. 12, SETTING and SET DATA (0002) change from flashing to ON state. f Select the CODE No. 13 to set the indoor unit No. with the , (SET TEMP) ...
Page 86 - Change the period of the filter timer; Select the CODE No. 02 with
4. Service procedures 1 2 3 4 Section – 86 – SM830076 (J) Change the period of the filter timer ❏ If the period of filter timer is not suitable (for example in case of dirty environment), theperiod can be shortened to half as follows: a Press the TEST / CHK button for more than 4 seconds. SET CL MOD...
Page 87 - Power Supply Wires; Refer to Electrical Wiring Diagram.; Checking the Electrical Components
4. Service procedures 1 2 3 4 Section – 87 – SM830076 Fig. 21 Coppertube ormetallic part Clip Insulationtester Probe Terminal plate 0639_X_S Fig. 22 Coppertube ormetallic part Clip Insulationtester Probe 0640_X_S Fig. 23 From fan motor,compressor and otherparts. Clip Probe Insulationtester Metallicp...
Page 88 - Checking the Protective Devices; Disconnect the connector which leads to the indoor fan motor (FMI).
4. Service procedures 1 2 3 4 Section – 88 – SM830076 (2) Checking the Protective Devices • Disconnect the connector, which consists of P (plug) and S (socket) when you want tocheck the protective device. • Then check continuity among plug’s (and/or socket’s) terminal as in Fig. 25. • Normality of t...
Page 89 - Checking the Electrical Parts
4. Service procedures 1 2 3 4 Section – 89 – SM830076 (3) Checking the Electrical Parts 1 Power transformer (TR1) ..................... Indoor unit *Measure the coil resistance. • Primary 230-208V ; Measure the resistance between No.1 and No.3 (WHT lead wires) terminals of 3P (WHT) socket connected ...
Page 90 - Method Used to Replace Fuse on PCB Ass’y; Remove the PCB Ass’y from the electrical compo-
4. Service procedures 1 2 3 4 Section – 90 – SM830076 Fan motorcapacitor Compressor motorcapacitor 1041_X_S Multimeter Ω Fig. 26 6 6 6 6 6 Continuity of fuse on P.C.B. Ass’y • Check for continuity using a multimeter as shown in Fig. 27. Method Used to Replace Fuse on PCB Ass’y 1. Remove the PCB Ass’...
Page 91 - Solenoid coil of the electronic refrigerant; Refer to “1-2 Major component specifications”.; Compressor motor magnetic contactor (52C) ............ Outdoor unit; Refer to “1-3 Other component specifications”.
4. Service procedures 1 2 3 4 Section – 91 – SM830076 7 Solenoid coil of the electronic refrigerant *Measure the coil resistance. control valve (ERCV) ………… Indoor unit • Measure the resistance between No. 5 (GRY lead wire) and other terminals (another color oflead wires) of 5P (WHT) plug connected t...
Page 92 - Sensor and Solenoid Layout Diagram
4. Service procedures 1 2 3 4 Section – 92 – SM830076 Indoor Unit• XHS2432 (4) Sensor and Solenoid Layout Diagram Outdoor Unit• CH2432 1154_THS_I TH6 (C1), (BLK) 20S 63PH TH7 (C2), (RED) TH8(GRN) TH6, 7, 8 CM CH TH8 (GRN)( Discharge gas) 1153_THS_I TH2 (E1), (RED) TH3 (E2), (BLK) Electronic expansio...
Page 94 - coil sensor; Thermistor Characteristic Curve
4. Service procedures 1 2 3 4 Section – 94 – SM830076 (2) Indoor heat exch. coil sensor : TH2(E1), TH3(E2) Outdoor heatexch. coil sensor : TH6(C1), TH7(C2) ( PBC-41E) (5) Thermistor Characteristic Curve (1) Room temp. sensor : TH1 (KTEC-35) –4 5 14 23 32 41 50 59 68 0 5 10 15 20 25 30 35 40 Temperat...
Page 97 - ) buttons at the same; N O T E
4. Service procedures 1 2 3 4 Section – 97 – SM830076 (8) Automatic Address Setting Method — For group control and central control withmultiple outdoor units — Carry out automatic address setting withthe remote controller.1) All auto. address operation 1 Press the TEST / CHK and ( ) buttons at the s...
Page 98 - table below check it.
4. Service procedures 1 2 3 4 Section – 98 – SM830076 (10) Items to Check Prior to Test Run 1) Turn on the power supply switch morethan 5 hours before in order to chargethe crank case heater. 2) Fully open the outdoor service valve aftermaking the leak inspection of fieldconnected tubing, vacuuming,...
Page 99 - Before starting the air conditioner, check the
4. Service procedures 1 2 3 4 Section – 99 – SM830076 (11) Test Run (11)-1. Preparing for Test Run Before starting the air conditioner, check the followings: (1) Remove all loose matter from the cabinet espe- cially metal filings, bits of wire, and clips. (2) Connect the control wiring correctly and...
Page 101 - One of CN4 of all linked outdoor units shold be short.
4. Service procedures 1 2 3 4 Section – 101 – SM830076 (11)-3. Test Run Procedure 1) One of CN4 of all linked outdoor units shold be short. 2) In case of using system controller, zone registration is required after finishing Test run.Regarding the zone registration, please refer to Installation Inst...
