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Summary of Contents for Technibel Climatisation CAV254R5TA Series
- Page 1 TECHNICAL DATA & SERVICE MANUAL INDOOR UNIT: CAV254R5TA- CAV364R5TA- CAV484R5TA- SPLIT SYSTEM AIR CONDITIONER Model No. Product Code No. CAV254R5TA- 387106966 CAV364R5TA- 387106967 CAV484R5TA- 387106968 0.8180.366.0 10/2004...
- Page 2 IMPORTANT! • Ground the unit following local electrical codes. • The Yellow/Green wire cannot be used for any connection Please read before installation different from the ground connection. • Connect all wiring tightly. Loose wiring may cause overheating This air conditioning system meets strict safety and operating at connection points and a possible fire hazard.
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Page 3: Table Of Contents
Table of Contents Page 1. SPECIFICATIONS 1-1 Unit specifications 1-2 Major Component specifications 1-3 Other Component specifications 2. DIMENSIONAL DATA 3. ELECTRICAL DATA 3-1 Electric Wiring Diagram 3-1 Schematic Diagram 4. FUNCTION 4-1 Room Temperature Control 4-2 Cold Draft Prevention (Heating Cycle) 4-3 Automatic Fan Speed (Indoor Unit) 4-4 Freeze Prevention (Cooling) 4-5 Overload Protection (Heating) -
Page 4: Specifications
1. SPECIFICATIONS 1-1 Unit Specifications CAV254R5TA- 220 - 240V ~ 50Hz Power source 230V Voltage rating Cooling Heating Performance See catalogue with the requested matching Capacity 1140/1020/840 Air circulation (High/Med./Low) m³/h Features Controls/Temperature controls Microprocessor/ I.C. thermostat Wired: K70D026ZAA Wireless: K70D027ZAA Remote Controller (Option) Timer ON/OFF 72 hours... - Page 5 CAV364R5TA- 220 - 240V ~ 50Hz Power source 230V Voltage rating Cooling Heating Performance See catalogue with the requested matching Capacity Air circulation (High/Med./Low) m³/h 1920/1680/1320 Features Microprocessor/ I.C. thermostat Controls/Temperature controls Wired: K70D026ZAA Wireless: K70D027ZAA Remote Controller (Option) ON/OFF 72 hours Timer ON/OFF 24 hours &...
- Page 6 CAV484R5TA- 220 - 240V ~ 50Hz Power source 230V Voltage rating Cooling Heating Performance See catalogue with the requested matching Capacity Air circulation (High/Med./Low) m³/h 1920/1680/1320 Features Microprocessor/ I.C. thermostat Controls/Temperature controls Wired: K70D026ZAA Wireless: K70D027ZAA Remote Controller (Option) ON/OFF 72 hours Timer ON/OFF 24 hours &...
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Page 7: Major Component Specifications
1-2 Major Component Specifications CAV254R5TA- Controller PCB CR-X253GH Part No. Microprocessor Controls Fan & Fan Motor Centrifugal fan Type 1…. Ø 443 Q'ty ……. Dia. and lenght Fan motor model…Q'ty SFG6X-41D6P…1 6 … 470 No. Of poles…rpm (230 V, High) Running Amps 0,611 31,4... - Page 8 CAV364R5TA- Controller PCB CR-X253GH Part No. Microprocessor Controls Fan & Fan Motor Centrifugal fan Type 1…. Ø 443 Q'ty ……. Dia. and lenght Fan motor model…Q'ty SFG6X-81A6P…1 6 … 530 No. Of poles…rpm (230 V, High) Running Amps 0,765 Power input Coil resistance (Ambient temp.
- Page 9 CAV484R5TA- Controller PCB CR-X253GH Part No. Microprocessor Controls Fan & Fan Motor Centrifugal fan Type 1…. Ø 443 Q'ty ……. Dia. and lenght Fan motor model…Q'ty SFG6X-81A6P…1 6 … 530 No. Of poles…rpm (230 V, High) Running Amps 0,871 51,9 Power input Coil resistance (Ambient temp.
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Page 10: Other Component Specifications
1-3 Other Component Specifications ATR-II215TA Trasformer VAC 230V, 50Hz Rating Primary 10,2V - 1.4A Secondary 7 VA Capacity Ω (WHT-WHT): 84 Coil resistance (BRN-BRN): 0,7 (RED-RED): 2,7 145°C Thermal cut-off temp. PBC-41E-S14, PB3M-41E-S4, PBC-41E-S42-2 Thermistor ( Coil sensor TH2, 3. 4) Resistance ΚΩ... -
Page 11: Dimensional Data
2. DIMENSIONAL DATA CAV254R5TA- 820 (Ceiling opening) 757 (Suspention bolt pitch) Air intake grille Air outlet Refrigerant liquid line [D. 9.52 (In case of 25 type , use the tube connector.)] Refrigerant gas line D. 12.7: 9, 12 type Drain connection Power supply entry For discharge duct For fresh air intake... - Page 12 CAV364R5TA- CAV484R5TA- 820 (Ceiling opening) 757 (Suspention bolt pitch) Air intake grille Air outlet Refrigerant liquid line (D.9.52) Refrigerant gas line (D.19.05) Drain connection Power supply entry For discharge duct For fresh air intake Suspension bolt mounting...
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Page 13: Electrical Data
3. ELECTRICAL DATA 3-1 Electric Wiring Diagram... -
Page 14: Schematic Diagram
3-2 Schematic Diagram... -
Page 15: Function
4. FUNCTIONS 4-1 Room temperature control The unit adjusts room temperature by turning the outdoor unit’s compressor ON and OFF. This process is controlled by the thermostat located in the indoor unit. The figures on this and the next page show how each part of the system performs as the room temperature changes and the thermostat activates the compressor to start (thermo ON) or stop (thermo OFF). - Page 16 (B) Heating THERMO. ON THERMO. ON REMOTE CONTROL THERMO. OFF THERMO. OFF SENSOR (Only for wireless THERMO. ON remote controller) SET. +1 ° C SETTING TEMP . SET. -1 ° THERMO. OFF THERMO. OFF BODY SENSOR THERMO. ON THERMO. ON THERMO.
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Page 17: Cold Draft Prevention (Heating Cycle)
4-2 Cold Draft Prevention (Heating Cycle) The cold draft prevention function controls indoor fan speed so a strong draft of cold air will not blow out before the indoor heat exchange coils have warmed up. STANDBY shows on the remote controller when the indoor fan speed is LL (very low) or OFF. This condition occurs in the following 3 cases: •... -
Page 18: Automatic Fan Speed (Indoor Unit)
4-3 Automatic Fan Speed (Indoor Unit) By pressing the FAN SPEED button on the remote controller, the fan speed can be set at one of four steps: AUTO., HI., MED., or LO. When set at AUTO. the indoor unit fan speed will be automatically adjusted to the room temperature as the two charts shown below. -
Page 19: Freeze Prevention (Cooling)
4-4 Freeze Prevention (Cooling) Freeze Prevention keeps the indoor heat exchange coil from freezing. Freezing reduces the efficiency of the unit, and frost build up on the coil blocks cool air circulation from the indoor unit's fan. MIN. VALUE OF EITHER E1 OR E2 INDOOR UNIT COIL TEMP . -
Page 20: Overload Protection (Heating)
4-5 Overload Protection (Heating) This function prevents the air conditioner from overloading. ( ° C) INDOOR UNIT COIL TEMP . (E2) OVERLOAD PROTECTION OVERLOAD PROTECTION FUZZY CONTROL FUZZY CONTROL ELECTRONIC EXPANSION VALVE OPEN OPEN START OUTDOOR FM COMPENSATION H or M H or M 1565_M_S Fig. -
Page 21: Discharge Temperature Control (Cooling And Heating)
4-6 Discharge Temperature Control (Cooling and Heating) This function prevents the compressor motor from burn out by overheating. DISCHARGE GAS TEMP . ( ° OUTDOOR FAN SPEED H or M H or M COMPRESSOR ELECTRONIC EXPANSION VALVE OPEN OPEN (DISCHARGE TEMP .) TRIP IS OPERATED. - Page 22 4-7 Auto. Mode for Automatic Heating/Cooling Switching COOLING SELECTION TEMP . +2.5 deg SHIFT SET TEMP . +2 deg REMOTE CONTROLLED SET TEMP . SHIFT SET TEMP . -2 deg HEATING SELECTION TEMP . -3 deg HEATING COOLING HEATING 0440_M_S Fig.
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Page 23: Automatic Restart After Power Interruption
4-8 Automatic Restart after Power Interruption This air conditionner has a power failure recovery function. 4-9 Electronic Expansion Control Valve This valve allows very precise and smooth control of the amount of refrigerant flow in the system. Since the valve is operated by a step motor, the control circuits can open or close it in very exact amounts, so the degree of heating or cooling can be changed by just a little, or changed very quickly or slowly. -
Page 24: Auto-Flap Control (Indoor Unit: 4-Way Air Discharge)
ROOM TEMP AREA T+2°C (T+1°C) SET TEMP . T °C T-2°C (T-1°C) 5 MINUTES 3 MINUTES COMPRESSOR OUTDOOR FAN INDOOR FAN Body sensor 0449_M_S Fig. 20 The indoor fan speed is automatically set to L and cannot be adjusted to M or H. When the set temperature is either 18 or 19°C, the set temperature is considered the same as 20°C. -
Page 25: Electronic Expansion Valve
4-12 Electronic Expansion Valve 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 is controlled between 90 and 480 steps after setting the initial step at the time when the thermostat is ON. Contents and Order of control Cooling Heating... -
Page 26: Troubleshooting
5. TROUBLESHOOTING This section explains: What the LED codes mean What the remote control unit display screen messages mean How to use the flow charts to find and solve problems How to use the self-diagnostic tests to find parts that aren’t working right This unit is made to be trouble free, and not need much service. - Page 27 (1)-2 Check before and after Troubleshooting (GRV250R7, GRV360R7, GRV480R7) Many problems may happen because of wiring or power supply problems, so you should check these areas first. Problems here can cause false results in some of the other tests, and so should be corrected first. 1 .
- Page 28 (2) General Troubleshooting Flow Chart: Diagnosis and Remedy When you have found a major problem, such as refrigerant not flowing in the system or reduced air circulation, come to this section and find the box listing the problem. Connected to the box are the main causes of the problem and their remedies. To find out which malfunction is happening in your case, check the remote controller for an Alarm Message, and follow the steps in section 3).
- Page 29 Heating b. Heating Poor heating Is setting temp. Change the setting temp. suitable ? Is heating load Review heating load too large ? estimate. Refrigerant flow 4-way valve is Replace the valve. failure defective. Refrigerant Charge with shortage refrigerant. Electronic refrigerant Replace the valve.
- Page 30 (3) Meanings of alarm messages If an error occurred in the air conditioner, the error condition is presented by indicating the error code in the wired remote controller display or by the combination of lamp statuses for operation, timer and heat stand-by (OFF status and flashing status).
- Page 31 Possible causes of troubles Indoor thermistor is either Indoor coil temp. (E1 = TH2) cannot be detected. open or short. Indoor coil temp. (E2 = TH3) cannot be detected. Indoor room temperature cannot be detected. : Operation Outdoor thermistor is either lamp open or short.
- Page 32 (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 light up to show the cause of the trouble, in addition to the Alarm message on the remote controller. LED 2 on LED 1 on Remote...
- Page 33 (5) Symptoms and parts to inspect 1) Symptom: LCD on the remote controller does not display and remote controller does not operate. Start Is there 12 V DC Repair the between 2 and 3 remote of the remote controller controller? wiring.
- Page 34 2) Symptom: LCD on the remote controller displays “CHECK E01”. (Unusual communication between remote controller and indoor unit.) Start Remote controller judges itself Replace the remote controller. with self-diagnostic functions Is there an open or a contact defect in the No. 1 line of the Correct the wiring.
- Page 35 4) Symptom: LCD on the remote controller is displaying “CHECK E04”. (Unusual communication between the indoor and outdoor units.) TART Cut the breaker and remove the Is the contact good at the 2P Correct the connections. indoor/outdoor unit control lines connector for indoor serial connected to U1 and U2 of the communications on the outdoor...
- Page 36 6) Symptom: LCD on the remote controller is displaying “CHECK E06”. (Unusual communication between the indoor and outdoor units) TART Is there a cut line or contact Correct wiring. defect between an indoor and outdoor unitÕs control line? Influenced by external noise 1903_M_I * See the section of INSTALLATION INSTRUCTION concerning with flexible combination system.
- Page 37 9) Symptom: LCD on the remote controller displays “CHECK P01”. (Indoor fan protection thermostat operation warning) TART Is there 220-240 V AC between S4 and T20-3 on the indoor unit PCB? Is the indoor fan wire winding protection thermostat (49FI) off? Replace the indoor fan.
- Page 38 10) Symptom: LCD on the remote controller displays “CHECK P02”. (Compressor / outdoor fan protection thermostat operation warning / power supply voltage abnormality) TART Is the power supply to the outdoor Check the power breaker etc. unit normal? and repair. (Voltage / defective phase?) Is the fuse on the outdoor unit Replace the fuse.
- Page 39 11) Symptoms: LCD on the remote controller displays “CHECK P03”. (Alarm for unusual discharge temp. of compressor) Start 0343_M_I 12) Symptom: LCD on the remote controller displays “CHECK P04”. (High-pressure switch activation warning) Start Are there connection defects in Repair the wiring. the wiring? High-pressure switch defect High-pressure switch activation...
- Page 40 13) Symptom: LCD on the remote controller displays “CHECK P05”. (Negative phase detection operation warning) Start Is the power supply to the outdoor Check the power breaker etc. unit normal? and repair (Voltage defective phase?) No problem Is the fuse (F1, F2) on the indoor Replace the fuse.
- Page 41 15) Symptom: LCD on the remote controller displays “CHECK E16”. TART Repair the wiring. 0647_M_S 16) “Check P9” is displayed on the remote control unit. TART Is 15P connector socket (RED) Connect firmly. being attached to panel connected firmly with 15P plug? 0649_M_S...
- Page 42 17) Symptom: LCD on the remote controller displays “CHECK H01, H02, H03”. (PC compressor current detection) * Please check the related part described in the following chart after confirming the code setting (S4) of the outdoor unit’s capacity on the PCB in the outdoor unit. Start “CHECK H01”...
- Page 43 (6) Procedures When a Specific Component Does Not Work 1) Indoor fan does not operate. Is fan motor capacitor Replace the capacitor. normal ? Is there voltage output Replace the P .C.B. Ass'y of P .C.B. Ass'y for fan in the indoor unit. motor ? - Check resistance of fan motor winding.
- Page 44 4) Compressor motor does not operate. Replace the compressor Does compressor motor magnetic contactor (52C) actuate ? motor magnetic contactor. Check resistance of compressor motor winding. Replace the compressor. 0461_M_I 5) Outdoor fan does not operate. Are auxiliary relays (1Y, 2Y) Replace the relays.
- Page 45 (7) Service Functions of Remote Controller From the remote controller you can control both the operation and settings of the unit as well as perform several useful service checks. This section explains how to use the remote controller on the following items from (A) to (J).
- Page 46 (B) Use the test run procedure The purpose of the test run function is to let you control the operation of the unit directly without turning the unit on or off by thermostat. As indicated in the following procedure, be sure to stop test run operation when you finish the procedure, or the air conditioner may be damaged.
- Page 47 (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 the sensor address. The indoor unit address is used only when several units are hooked up to one remote controller (group control). If there is only one unit, made up of one indoor and one outdoor unit, then only the sensor address should be put in, as shown in the procedure below.
- Page 48 Refer to the table below for the relationship between the sensor address and the location of the sensor. Relationship between the sensor address and the location of sensor Sensor Address (CODE No.) Location of Sensor (Thermistor): °C Indoor Unit Indoor air suction Temp. Indoor coil Temp.(E1) Indoor coil Temp.(E2) Indoor coil Temp.(E3)
- Page 49 This picture shows the service check display. UNIT No. R.C. Refrigerant Circuit No. CODE No. CHECK Alarm message SER VICE c) . A maximum of 4 alarm messages can be accessed by pressing either SET TEMP button follows. MODE NOTE Pressing CL (Clear) button will clear all the service history.
- Page 50 Important Never press CL (clear) button unless you want to erase the accessed data in memory. Follow the procedure below only when erasing is necessary. To erase accessed data, press the CL button. When erasing is finished,“----” mark appears on the controller’s display. CAUTION After checking the alarm messages, be sure to press the TEST / CHK button.
- Page 51 (F) Execute the auto. address operation Auto. address operation is executed by pressing the A. ADD (S1) button of outdoor unit’s PCB usually. For your convenience it can be executed by remote controller also. ¿ a) Press the TEST / CHK and ) buttons at the same time for more than 4 seconds.
- Page 52 (G) Confirm and change the indoor unit address The purpose of the above function is to let you confirm the indoor unit address after the auto. address operation, and change the indoor unit address if it is needed. ¿ a) Press the TEST / CHK and ) buttons at the same time for more than 4 seconds.
- Page 53 ¿ e) Set the required new indoor unit’s No. by pressing the ) button. AIR FLOW UNIT MODE Ex: UNIT No. 3-6: currently registered indoor unit address R.C. FLAP Required new indoor No.8: SET DATA 0364_M_I f) Press the SET button. UNIT No, SET DATA (0008) and changes from flashing to ON state.
- Page 54 (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 at heating mode because of the hot air temperature around ceiling level. In order to solve the problem, the shift temp. (valid while heating only) is set when shipped from factory.
- Page 55 ( 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. NOTE 1) In case of group control, branch wiring for group control should be removed temporarily. 2) In case of remote controllerless system, remote controller should be connected with the indoor unit temporarily.
- Page 56 ¿ d) Set the No. of R. C. which you want to set with ) button. Ex. No. of R. C. will be set 2. AIR FLOW UNIT MODE R.C. FLAP 0369_M_I e) Press the SET button. UNIT No., CODE No. 12, and SET DATA (0002) change from flashing to ON state.
- Page 57 i) Select the code No. 14 to set group setting with the (SET TEMP) button. ¿ j) Set the No. of group setting as shown below with the ) button. AIR FLOW UNIT MODE R.C. FLAP 0371_M_I k) Press the SET button. UNIT No., CODE No.
- Page 58 (J) Change the period of the filter timer If the period of filter timer is not suitable (for example in case of dirty environment), the period can be shortened to half as follows: a) Press the TEST / CHK button for more than 4 seconds. AIR FLOW UNIT MODE...
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Page 59: Checking Electrical Components
6. CHECKING ELECTRICAL COMPONENTS 6-1 Measurement of Insulation power plug (Local supply) Resistance Ground The insulation is in good condition if the resistance exceeds 1MΩ probe Insulation tester NOTE 6-1-1. Power supply wires The shape of the power plug may differ from that of the air conditioner which you are servicing. -
Page 60: Checking Continuity Of Fuse On Pcb Ass'y
6-2 Checking Continuity of Fuse on PCB Ass'y Fuse Remove the PCB Ass'y from the electrical component box. Then pull out the fuse from the PCB Ass'y. (fig.5) PCB Ass’y Check for continuity using a multimeter as shown in fig.6 Fig. -
Page 61: Thermistor Characteristic Curve
6-4 Thermistor Characteristic Curve (1) Room temp. sensor : TH1 (KTEC-35) (2) Indoor heat exch. TH5 (KTEC-35) coil sensor : TH2(E1), TH3(E2), TH4(E3) Outdoor heat exch. coil sensor : TH6(C1), TH7(C2) ( PBC-41E) ( PB3M-41E) T emperature (°C) 0375_M_I T emperature (°C) 0374_M_I (3) Compressor discharge gas temp. - Page 62 7. P.C.B. CN79 (RED) : HU1 CN77 (GRN) : LM CN85 (BLU) : DPH CN74 (WHT) : RN2 CN76 (BLK) : OP1 CN73 (BLK) : RN1 CN78 (BLU) : DP CN84 (WHT) : RN3 F1 : Fuse 250V / 5A CN81 (GRY) : T20 CN80 (RED) : 26H D80 (RED)
- Page 63 R.D. 28 Reyrieux BP 131 - 01601 Trévoux CEDEX France Tél. 04.74.00.92.92 - Fax 04.74.00.42.00 R.C.S. Bourg-en-Bresse B 759 200 728...
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