Sanyo AHX0752 Service Manual
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Sanyo AHX0752 Service Manual

W-2way eco-i multi system
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See also: Instruction Manual , Instruction and Installation Manual
TEST RUN SERVICE MANUAL
R410A Models
Indoor Units
Class
X 4-Way Air Discharge Semi-Concealed
A 1-Way Air Discharge Semi-Concealed AHX0752 AHX0952 AHX1252
U Concealed-Duct
D Concealed-Duct High-Static Pressure
T Ceiling-Mounted
K Wall-Mounted
Outdooe Units
Class
C ECO-i W-2WAY
85464849257000
7
9
12
XHX1252 XHX1852 XHX2452 XHX3652
UHX0752
UHX1252 UHX1852 UHX2452 UHX3652
THX1252 THX1852 THX2452
KHX0752 KHX0952 KHX1252 KHX1852 KHX2452
90
140
CHDX09053 CHDX14053
18
24
36
DHX3652 DHX4852
REFERENCE NO.
48
SM830157

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  • Page 1 TEST RUN SERVICE MANUAL R410A Models Indoor Units Class X 4-Way Air Discharge Semi-Concealed A 1-Way Air Discharge Semi-Concealed AHX0752 AHX0952 AHX1252 U Concealed-Duct D Concealed-Duct High-Static Pressure T Ceiling-Mounted K Wall-Mounted Outdooe Units Class C ECO-i W-2WAY 85464849257000 XHX1252 XHX1852 XHX2452 XHX3652...
  • Page 3 If a single unit of the multi air conditioner system is to be installed in a small room, select a suitable model and installation pro- cedure so that if the refrigerant accidentally leaks out,...

  • Page 4: Table Of Contents

    Section 1: TEST RUN ...1-1 Test Run ...1-2 Setting of Unit Control PCB ...1-4 Auto Address Setting ...1-6 Remote Controller Test Run Settings ...1-12 Caution for Pump Down ...1-13 Meaning of Alarm Messages ...1-14 Section 2: REMOTE CONTROL FUNCTIONS ...2-1 Main Operating Functions ...2-2 Wireless Remote Controller ...2-4 Timer Remote Controller (RCS-TM80BG) ...2-15...

  • Page 5: Test Run

    Contents 1. Test Run ...1-2 1. Preparing for Test Run ...1-2 2. Test Run Procedure ...1-3 2. Setting of Unit Control PCB ...1-4 1. Main Outdoor Unit PCB Setting ...1-4 3. Auto Address Setting ...1-6 1. Auto Address Setting ...1-6 4.

  • Page 6: Test Run

    1. Test Run 1. Preparing for Test Run Before attempting to start the air conditioner, check the fol- lowing. (1) All loose matter is removed from the cabinet, especially steel fi lings, bits of wire, and clips. (2) The control wiring is correctly connected and all electrical connections are tight.

  • Page 7: Test Run Procedure

    1. Test Run 2. Test Run Procedure Recheck the items to check before the test run. Have the outdoor sub units been connected? <Outdoor unit control PCB> Set the unit address. Unit No. setting switch (S007) <Outdoor unit control PCB> Unit No.

  • Page 8: Setting Of Unit Control Pcb

    2. Setting of Unit Control PCB 1. Main Outdoor Unit PCB Setting CN100 CN101 CN003 S004 S002 S003 S005 S006 S007 Test Run...
  • Page 9 2. Setting of Unit Control PCB Examples of the No. of indoor units settings (S005, S004) Indoor unit setting (S005) No. of indoor units (3P DIP switch, blue) 1 unit (factory setting) All OFF 11 units 1 ON 21 units 2 ON 31 units 3 ON...

  • Page 10: Auto Address Setting

    3. Auto Address Setting 1. Auto Address Setting Basic wiring diagram: Example (1) • If link wiring is not used (The inter-unit control wires are not connected to multiple refrigerant systems.) Indoor unit addresses can be set without operating the compressors. No.
  • Page 11 3. Auto Address Setting Basic wiring diagram: Example (2) No. 1 (main outdoor unit) settings System address No. of indoor units (system 1 setting) (13 units setting) (S002) (S003) No. of Unit (S006) outdoor units number (3 units setting setting) (unit No.
  • Page 12 3. Auto Address Setting Case 2 Automatic Address Setting (no compressor operation) Indoor and outdoor unit power can be turned ON for each system separately. Indoor unit addresses can be set without operating the compressors. Automatic Address Setting from Outdoor Unit On the No.
  • Page 13 3. Auto Address Setting Case 3A Automatic Address Setting in Heating Mode Indoor and outdoor unit power cannot be turned ON for each system separately. In the following, automatic setting of indoor unit addresses is not possible if the compressors are not operating. Therefore perform this process only after completing all refrigerant tubing work.
  • Page 14 3. Auto Address Setting Case 3B Automatic Address Setting in Cooling Mode Indoor and outdoor unit power cannot be turned ON for each system separately. In the following, automatic setting of indoor unit addresses is not possible if the compressors are not operating. Therefore perform this process only after completing all refrigerant tubing work.
  • Page 15 3. Auto Address Setting Display during automatic address setting On outdoor main unit PCB Do not short-circuit the automatic address setting pin (CN100) again while automatic address setting is in progress. Doing so will cancel the setting operation and will cause LED 1 and 2 to turn OFF. Blink alternately When automatic address setting has been successfully completed, both LED 1 and 2 turn OFF.

  • Page 16: Remote Controller Test Run Settings

    3. Auto Address Setting 4. Remote Controller Test Run Settings Request concerning recording the indoor/outdoor unit combination Nos. After automatic address setting has been completed, be sure to record them for future reference. List the outdoor main unit system address and the addresses of the indoor units in that system in an easily visible location (next to the nameplate), using a permanent marking pen or similar means that cannot be abraded easily.

  • Page 17: Caution For Pump Down

    5. Caution for Pump Down 5. Caution for Pump Down Pump down means refrigerant gas in the system is returned to the outdoor unit. Pump down is used when the unit is to be moved, or before servicing the refrigerant circuit. This outdoor unit cannot collect more than the rated refrigerant amount as CAUTION...

  • Page 18: Meaning Of Alarm Messages

    6. Meaning of Alarm Messages 6. Meaning of Alarm Messages Table of Self-Diagnostics Functions and Description of Alarm Displays Alarm messages are indicated by the blinking of LED 1 and 2 (D72, D75) on the outdoor unit PCB. They are also displayed on the wired remote controller.
  • Page 19 6. Meaning of Alarm Messages Possible cause of malfunction Activation of Protective device in outdoor unit protective is activated. device Thermistor fault Indoor thermistor is either open or damaged. Outdoor thermistor is either open or damaged. EEP ROM on indoor unit PCB failure Protective Protective device for device for...
  • Page 20 6. Meaning of Alarm Messages Alarm messages displayed on system controller Serial Error in transmitting serial communication communication signal errors Mis-setting Error in receiving serial communication signal Activation of Protective device of sub indoor protective unit in group control is activated device NOTE Alarm messages in <<...

  • Page 21: Section 2: Remote Control Functions

    Contents 2. REMOTE CONTROL FUNCTIONS 1.Main Operating Functions ...2-2 1. Room Temperature Control ...2-2 2. Automatic Control for Heating and Cooling ...2-3 2.Wireless Remote Controller ...2-4 1. How to Use the Wireless Remote Controller ...2-4 2. Receiver ...2-7 3. Operation ...2-8 4.

  • Page 22: Main Operating Functions

    1. Main Operating Functions 1. Room Temperature Control The thermostat is turned ON/OFF according to When remote controller sensor is used When body sensor is used * Intake shift temperature (enabled only during heating) During heating, a difference in temperature occurs between the top and bottom of a room. This value is set in consideration for the difference between the temperature detected by the body sensor and the temperature at the bottom of the room.

  • Page 23: Automatic Control For Heating And Cooling

    1. Main Operating Functions 2. Automatic Control for Heating and Cooling Automatic Heating/Cooling Control (1) When operation starts, heating or cooling is selected according to the set temperature and the room temperature. Room temperature Set temperature + 2F Set temperature – 2F < Room temperature Room temperature <...

  • Page 24: Wireless Remote Controller

    This button is for turning the air conditioner on and off. When you press the buttons on the wireless remote control unit, the display to transmit the setting changes to the receiver in the air conditioner. Use this button to select one of the following five operating modes.
  • Page 25 The room temperature is detected by the sensor which is built into the indoor unit and the air conditioner is controlled accordingly. NOTE If the remote control is located near a heat source, such as a space heater or in direct sunlight, press the A/C SENSOR button to switch to the sensor on the indoor unit.
  • Page 26 This is used when a ventilation fan (available commercially) is connected. Pressing the VENTILATION button turns the fan on and off. The ventilation fan also turns on and off when the air conditioner unit is turned on and off. (The display of the remote control unit shows "...

  • Page 27: Receiver

    2. Wireless Remote Controller 2. Receiver The signal receivers with the exception of the separately installed signal receiver are mounted on the indoor units. X type K type A: Receiver This section picks up infrared signals from the wireless remote control unit (transmitter). Indication lamps One of these lamps will blink when trouble has occurred.

  • Page 28: Operation

    Press the operation button (ON/OFF button) again. The air conditioner automatically performs heating and cooling operation based on the difference between the temperature setting and room temperature. All indoor units in the same refrigerant system can be operated with a single group control.

  • Page 29: Using The Wireless Remote Control Unit

    • Avoid placing the wireless remote control unit where it will be exposed to direct sunlight or in the direct path of the air blown out from the air conditioner, near a heating appliance, etc. • Do not drop, throw or wash the wireless remote control unit.

  • Page 30: Address Settings

    2. Wireless Remote Controller When mounting the • Before mounting the wireless remote control unit on the wall, place the unit at the mounting wireless remote control position, press the ON/OFF operation button and check that the signals are received unit on a wall for use properly.
  • Page 31 2. Wireless Remote Controller Wireless remote control unit address displays X type * The address switch Position of in the operation area may be set to address switch on any position. signal receiver (inside indoor unit) T type * The address switch in the operation Position of area may be set to...

  • Page 32: Emergency Operation

    Shutdown Set the ON/OFF operation switch to “OFF.” • TEST is used to initiate a trial run when the air conditioner is first installed. It is not used under normal circumstances. • To restart the wireless remote control unit's operation, the ON/OFF operation switch must be set to ON without fail.
  • Page 33 Initiate operation using the Emergency operation button in the signal receiver. 1. Press the Emergency operation button. The air conditioner initiates a cooling operation when its operation is started up at a room temperature of 75°F (24°C) or above. Conversely, it initiates a heating operation when its operation is started up at a room temperature below 75°F (24°C).

  • Page 34: Troubleshooting

    Timer If the trouble persists even after performing the checks recommended above, shut down the air conditioner's operation, set the local power switch to OFF, and contact your dealer with the model number and trouble symptoms. You must NOT attempt to make repairs yourself due to the dangers involved.

  • Page 35: Timer Remote Controller (Rcs-Tm80Bg)

    3. Timer Remote Controller (RCS-TM80BG) 1. How to Use the Timer Remote Controller Operating buttons Display 29 26 2-15 Remote Control Functions 15 14...

  • Page 36: Names And Operations

    Start/Stop button Pushing this button starts, and pushing again stops the unit. Operation lamp The lamp is turned on when an air conditioner is in opera- tion. This lamp blinks when an error occurs or a protective device is activated.
  • Page 37 Appears when a fan available in the market is installed and is operating. Oil indication Appears when the engine oil needs to be changed. (Ap- pears when the gas heat pump air conditioner is used.) Sleeping Appears during the sleeping function. CAUTION Appears when the protective device is activated or when an abnormality occurs.

  • Page 38: Installation Manual For Timer Remote Controller

    3. Timer Remote Controller (RCS-TM80BG) 3. Installation Manual for Timer Remote Controller Accessories for remote controller switch Remote controller Wood screws (with 8 in. wire) 4. How to install the Remote Controller Do not supply power to the unit or try to operate it until the tubing and wiring to the outdoor unit is CAUTION completed.

  • Page 39: Group Control Using 2 Remote Controllers

    3. Timer Remote Controller (RCS-TM80BG) Use AWG#20 to AWG#16 wires. Remote controller wiring can be extended to a maximum of 1640 ft. (1) Strip the insulation to approximately 35/64" from the ends of the wires that will be connected. (2) Twist together the 2 wires and create a crimp connection at the wire joint.
  • Page 40 3. Timer Remote Controller (RCS-TM80BG) Fig. 2-4 Caution when installing the remote controller *1 Install the remote controller more than 3-3/8" apart from the wall surface. *2 To install the remote controllers side-by-side, keep the space between each for more than 4-59/64". *3 To install the remote controllers one above the other, keep the space between each for more than 1".

  • Page 41: Setting The Present Time

    3. Timer Remote Controller (RCS-TM80BG) 10. Setting the Present Time Press and hold for more than 2 seconds to enter in the present day and time setting mode. Once you enter in the setting mode, Set “ ” to today’s day of the week. Press to move “...

  • Page 42: Weekly Program Function

    3. Timer Remote Controller (RCS-TM80BG) 11. Weekly Program Function Checking Weekly Timer Set the weekly program assigning a given timer to each day of the week. Maximum of 6 programs a day and 42 programs a week can be set. Select the day and the TIMER number you want to program.
  • Page 43 3. Timer Remote Controller (RCS-TM80BG) Changing the Program Timer To set the weekly program, follow the steps below. Select the program you want to set in the program confi rmation mode, and press . The enters the setting mode of the program currently displayed. * In the program setting mode, “minute”...
  • Page 44 3. Timer Remote Controller (RCS-TM80BG) 4. Set the program pattern. (program step 3) There are 4 program patterns. Pressing repeats the following display patterns. Pattern 1 The indoor unit starts operation at the programmed time. Pattern 2 The indoor unit stops operation at the programmed time.
  • Page 45 3. Timer Remote Controller (RCS-TM80BG) Deleting the Program Timer To delete the program timer setting, follow the steps below. Press to enter the program confi rmation mode. Press to select the day of the program you want to de- lete. Press to select a TIMER No.
  • Page 46 3. Timer Remote Controller (RCS-TM80BG) Duplicating the Program Timer You can duplicate the preset program by day. Select the copy source. is pressed in program checking mode the copy mode (Selecting the copy source gram timer. While in the copy mode of the program timer, (day) of the copy source fl...

  • Page 47: Outing Function

    General Performance of the Outing Function COOL / DRY The air conditioner starts operation when the room temperature increases up to –1.8°F(1°C) of the upper limit. The air conditioner stops operation when the room temperature decreases up to –3.6°F(2°C) of the upper limit.
  • Page 48 A remote controller loses outing function operation information when it is cut for more than one hour during the outing function operation by electricity. It reverts from the blackout, and an air conditioner does not drive in outing function when operation is started.

  • Page 49: Sleeping Function

    3. Timer Remote Controller (RCS-TM80BG) 13. Sleeping Function This function leads you to a comfortable sleep and chang- es the room temperature during your sleep. You can set the off timer every one hour from 1 to 10 hours. Display of remote control unit Operating time (during the time setting) In case the present time...

  • Page 50: Wired Remote Controller Test Run Setting

    3. Timer Remote Controller (RCS-TM80BG) 14. Wired Remote Controller Test Run Settings 1. Press the remote controller 2. “TEST” appears on the LCD display while the test run is in progress. 3. Then press the ● The temperature cannot be adjusted when in Test Run mode. (This mode places a heavy load on the machines.

  • Page 51: Simple Settings Function

    3. Timer Remote Controller (RCS-TM80BG) 15. Simple Settings Function • This allows the filter lifetime, operating mode prior- ity change, central control address, and other set- tings to be made for an individual or group-control indoor unit to which the remote controller used for simple settings is connected.
  • Page 52 3. Timer Remote Controller (RCS-TM80BG) List of Simple Setting Items Filter sign ON time (filter lifetime) Degree of filter fouling Central control address Operating mode priority change Fan speed when heating thermostat is Heating intake temperature shift Electric heater installation midifying when heater thermostat is Change to remote...

  • Page 53: Detailed Settings Function

    3. Timer Remote Controller (RCS-TM80BG) 16. Detailed Settings Functions • This allows the system address, indoor unit address, and other settings to be made for the individual or group-control indoor unit to which the remote controller used for detailed settings is con- nected.
  • Page 54 3. Timer Remote Controller (RCS-TM80BG) List of Detailed Setting Items Item code Item 0000 Type 0006 0001 Indoor unit 0009 capacity 0017 0001 Unit No. 1 0002 Unit No. 2 0003 Unit No. 3 System address 0030 Unit No. 30 0099 Not set 0001 Unit No.
  • Page 55 3. Timer Remote Controller (RCS-TM80BG) Item Item code Forced thermostat ON (1B) time Cooling discharge temperature shift Heating discharge temperature shift Temperature shift for cooling/heating change in “Auto Heat/Cool” mode (Upper limit) (Lower limit) (Upper limit) Change to remote (Lower limit) control temperature setting range...
  • Page 56 3. Timer Remote Controller (RCS-TM80BG) Item Item code Automatic drain pump operation Ventilation fan operation Wired remote controller sensor “ Operation change control in progress ” display OFF reminder function for when weekly timer is used Discharge temperature control RAP valve Heat exchanger temperature for cold air discharge (Heat exchanger control point...
  • Page 57 3. Timer Remote Controller (RCS-TM80BG) Item Item code 0000 Standard 0001 For low Fan tap setting (Fan tap change in order to prevent drop in air discharge caused by filter installation) 0003 0006 0000 No humidifier output 0001 1 sec. Humidifier ON 0002 2 sec.
  • Page 58 3. Timer Remote Controller (RCS-TM80BG) Selecting the DC fan motor tap (when setting with the remote controller) <Procedure> Stop the system before performing these steps. Press and hold the for 4 seconds or longer. If group control is in effect, press the the address (unit No.) of the indoor unit to set.
  • Page 59 3. Timer Remote Controller (RCS-TM80BG) Selecting the DC fan motor tap (when setting from the PCB) ● 4-way Air Discharge Semi-Concealed type <Procedure> Stop the system before performing these steps. Open the electrical component box cover, then check the indoor unit control PCB. Connect the jumper connector (2P: yellow) which was supplied with the accessory to the correct connector pin on the indoor unit control PCB according to the setting number which was confirmed in Table 1 (Table of DC Fan Motor Tap Settings).

  • Page 60: Remote Controller Servicing Functions

    3. Timer Remote Controller (RCS-TM80BG) 17. Remote Controller Servicing Functions O p e r a t i o n w i t h T e s t r u n f o r c e d t h e r m o s t a t S e n s o r T e m p e r a t u r e t e m p e r a t u r e...
  • Page 61 3. Timer Remote Controller (RCS-TM80BG) Test Run Function Operates the unit with the thermostat forced ON. <Procedure> Press and hold the button for 4 seconds or longer. “Test” appears on the remote controller LCD display. Start operation. Press the button to return to normal remote controller display.
  • Page 62 3. Timer Remote Controller (RCS-TM80BG) ■ Sensor Temperature Display Function (displayed regardless of whether unit is operating or stopped) The procedure below displays the sensor tempera- tures from the remote controller, indoor unit, and out- door unit on the remote controller. <Procedure>...

  • Page 63: Section 3: Trouble Diagnosis

    Contents 1. Contents of Remote Controller Switch Alarm Display ...3-2 2. Outdoor Unit Control PCB LED Display ...3-4 3. W-2WAY ECO-i Alarm Codes ...3-5 4. Blinking (Inspection) Display on the Remote Controller ... 3-22 3. TROUBLE DIAGNOSIS Trouble Diagnosis...

  • Page 64: Contents Of Remote Controller Switch Alarm Display

    1. Contents of Remote Controller Switch Alarm Display Remote controller is Serial detecting error signal from communication indoor unit. errors Mis-setting Indoor unit is detecting error signal from remote controller and system controller. Indoor unit is detecting error signal from outdoor unit. Outdoor unit is detecting error signal from indoor unit.

  • Page 65: Trouble Diagnosis

    1. Contents of Remote Controller Switch Alarm Display Possible cause of malfunction Outdoor unit Thermistor fault Ceiling panel connection failure Indoor unit Protective device Outdoor unit Failure of nonvolatile memory IC (EEPROM) on indoor unit control PCB Failure of nonvolatile memory IC (EEPROM) on outdoor unit control PCB Overload current detected.

  • Page 66: Outdoor Unit Control Pcb Led Display

    2. Outdoor Unit Control PCB LED Display LED (RED) (Both OFF) (OFF) (ON) (Both OFF) (Blinking alternately) (Both blinking) (Blinking alternately) Display meaning After the power is turned ON (and automatic address setting is not in progress), no communication with the indoor units in that system is possible. After power is turned ON (and automatic address setting is not in progress), 1 or more indoor units are confirmed in that system;...

  • Page 67: W-2Way Eco-I Alarm Codes

    3. W-2WAY ECO-i Alarm Codes W-2WAY ECO-i Trouble Diagnosis Alarm code Outdoor unit failed to receive serial communication signals from indoor unit. Automatic address setting start is prohibited. Automatic address setting alarm (too few units) Automatic address setting alarm (too many units) No indoor units at automatic address setting.
  • Page 68 3. W-2WAY ECO-i Alarm Codes E06 alarm E06 Alarm Alarm code Alarm meaning Outdoor unit failed to receive serial communication signals from indoor unit. Alarm conditions Outdoor unit failed to receive serial communication signals from indoor unit. Probable cause (1) The indoor unit power was cut OFF after initial communications were completed. (2) An open circuit or short circuit occurred in the inter-unit control wiring after initial communications were completed.
  • Page 69 3. W-2WAY ECO-i Alarm Codes E16 Alarm Alarm code Alarm meaning Automatic address setting alarm (too many units) Alarm conditions • There were a number of indoor units was too many when Automatic address setting was performed at a number of indoor units. •...
  • Page 70 3. W-2WAY ECO-i Alarm Codes E25 Alarm Alarm code Alarm meaning Outdoor unit address setting failure (duplication) Alarm conditions Communication by the outdoor unit main/sub control wiring was received that contained the same address as that unit 5 times or more within 3 minutes. Probable cause The unit number is set incorrectly.
  • Page 71 3. W-2WAY ECO-i Alarm Codes F04, F05, F22 Alarm Alarm code F04, F05, F22 Alarm meaning Compressor 1 discharge temperature sensor (DISCH1) trouble, compressor 2 discharge temperature sensor (DISCH2) trouble, Compressor 3 discharge temperature sensor (DISCH3) trouble. Alarm conditions (1) Discharge temp. of 212°F (100°C) or higher was detected 20 minutes or more after that compressor stopped operating.
  • Page 72 3. W-2WAY ECO-i Alarm Codes (3) Leakage from the discharge tube check valve Trouble: Although the other compressor is operating and this compressor is stopped, the (4) The ambient temperature arou nd the outdoor unit when it is stopped is 109°F (43°C) or higher. Correction (1) Replace the sensor.
  • Page 73 3. W-2WAY ECO-i Alarm Codes Alarm meaning Outdoor air temperature sensor (AIR TEMP) trouble Alarm conditions (1) A/D step is 10 steps or less (short circuit). (2) A/D step is 1014 steps or more (open circuit) Probable cause (1) Sensor malfunction (including connector) (2) PCB malfunction Check (1) Measure the sensor resistance.
  • Page 74 3. W-2WAY ECO-i Alarm Codes F31 Alarm Alarm code Alarm meaning Outdoor unit non-volatile memory (EEPROM) trouble Alarm conditions (1) Non-volatile memory is not present when power initialization occurs. (2) Read values do not match after writing to non-volatile memory is complete. Probable cause (1) Memory was not inserted after the PCB was replaced.
  • Page 75 3. W-2WAY ECO-i Alarm Codes H06 Alarm Alarm code Alarm meaning Abnormal low-pressure drop Alarm conditions A pre-trip occurs during the unit’s operation when the low-pressure sensor installed at constant low-pressure parts detects a pressure of 7.25 psi or less continuously for 2 minutes, or an instantaneous pressure of 2.90 psi or less.
  • Page 76 3. W-2WAY ECO-i Alarm Codes H11, H12, H21, H22 Alarm Alarm code H11, H12, H21, H22 H11: Compressor 2 (constant speed) overcurrent alarm Alarm meaning H12: Compressor 2 (constant speed) lock current alarm H21: Compressor 3 (constant speed) overcurrent alarm H22: Compressor 3 (constant speed) lock current alarm Alarm conditions H11, H21: During operation, the compressor current value exceeded 12 A for 30 seconds or longer.
  • Page 77 3. W-2WAY ECO-i Alarm Codes H13, H23 Alarm Alarm code H13, H23 Alarm meaning Compressor 2 CT sensor (CT2) disconnected or short-circuit; Compressor 3 CT sensor (CT3) disconnected or short-circuit. Alarm conditions The current is still 1.5 A or less when 2 seconds or longer has elapsed after output from that compressor started.
  • Page 78 3. W-2WAY ECO-i Alarm Codes H31 Alarm Alarm code Alarm meaning HIC trouble alarm Alarm conditions This alarm occurs when the microcomputer identifies a trouble signal (indicating abnormal HIC temperature or other trouble) from the HIC. The HIC judges the current and temperature, and outputs the trouble signal. In general this indicates trouble with the HIC itself.

  • Page 79: Outdoor Unit Maintenance Remote Controller

    3. W-2WAY ECO-i Alarm Codes L06 Alarm Alarm code Alarm meaning Duplicated indoor unit priority (alarm at non-priority indoor units and outdoor unit) Alarm conditions Multiple indoor units set as the priority unit were detected in the system. Probable cause More than one indoor unit is set as the priority unit in the system.
  • Page 80 3. W-2WAY ECO-i Alarm Codes P03, P17, P18 Alarm Alarm code P03, P17, P18 Alarm meaning Compressor 1 discharge temperature trouble; Compressor 2 discharge temperature trouble; Compressor 3 discharge temperature trouble Alarm conditions Pre-trip stop at 222°F (106°C) or higher This alarm occurs when the pre-trip counter reaches 4.
  • Page 81 3. W-2WAY ECO-i Alarm Codes P04 Alarm Alarm code Alarm meaning High-pressure switch activated. Alarm conditions When the electrical circuit of the high-pressure switch is activated, then depending on the pressure, the terminals may be short-circuited. If the pressure is 464 psi or higher, the terminals will be short-circuited.
  • Page 82 3. W-2WAY ECO-i Alarm Codes P05 Alarm Alarm code Alarm meaning Reverse phase (or missing phase) detected Alarm conditions This alarm occurs when a reverse phase or missing phase is detected in the L1-L2-L3 phases. Probable cause Reverse phase or missing phase in the L1-L2-L3 phases Check Check the wiring at the power terminal plate.
  • Page 83 3. W-2WAY ECO-i Alarm Codes P22 Alarm Alarm code Alarm meaning Fan motor trouble Alarm conditions Fan motor start failure, fan motor Hall IC input failure Probable cause Possible causes are a Hall IC input circuit failure and a fan HIC failure. Check Check the fan motor wiring, the Hall IC wiring, and the connector connections.

  • Page 84: Blinking (Inspection) Display On The Remote Controller

    4. Blinking (Inspection) Display on the Remote Controller Currently the blinking inspection display can be displayed only on the wired remote CAUTION controller and system remote controller. Blinking inspection display (1) (Automatic backup) Alarm code (Blinking Alarm meaning Automatic backup is in progress. A/C units can be operated. Status: The compressor at one of the outdoor units where the outdoor unit fan is running Alarm conditions When alarm P16, P22, P26, P29, Hx1, Hx2, or H31 has occurred, correcting the control device...
  • Page 85 4. Blinking (Inspection) Display on the Remote Controller Blinking inspection display (2) (compressor magnet SW seizing detection) (Blinking inspection display) Alarm code Alarm meaning Compressor magnet SW seizing detected Status: The compressor and outdoor unit fan motor continue to run even though all indoor units within that refrigerant tubing system are stopped.

  • Page 87: Section 4: Pcb And Functions

    Contents 1. Outdoor Unit Control PCB ...4-2 1. Outdoor Unit Control PCB CR-CHDX14053 ...4-2 2. Functions (for CR-CHDX14053) ...4-3 2. Indoor Unit Control PCB ...4-6 1. Indoor Unit Control PCB Switches and Functions ...4-6 1. For AC Fan Motor (CR-UXRP71B-B) ...4-7 2.

  • Page 88: Outdoor Unit Control Pcb

    1. Outdoor Unit Control PCB 1. Outdoor Unit Control PCB CR-CHDX14053 A.ADD(CN100)pin OAC(CN105)pin MODE(CN101)pin AP(CN102)pin STOP(CN104)pin CHK(CN023)pin RUN(CN103)pin TEST(CN022)pin Terminal plug EMG(CN002)plug Control circuit fuse(F003) OC(CN001)plug RC(CN006)plug RC1(CN106)plug Low-pressure sensor Comp. discharge 3 temp. Outdoor air temp. Comp. discharge 2 temp. Gas temp.

  • Page 89: Functions (For Cr-Chdx14053)

    1. Outdoor Unit Control PCB 2. Functions (for CR-CHDX14053) Automatic address setting 2P plug (white): Automatic address setting pin (CN100) • Short-circuit this pin for 1 second or longer to automatically set the addresses at the indoor units that are connected to that outdoor unit and are within the same system. •...
  • Page 90 1. Outdoor Unit Control PCB Terminal plug LED1, 2 D72, D75 Power LED (CN103) Stop (CN104) (CN102) Mode (CN101) Test (CN022) 3P plug (black): For communications circuit impedance matching • A connecting socket (3P, black) is attached to the terminal plug at the time of shipment from the factory.
  • Page 91 1. Outdoor Unit Control PCB Table 1. Setting the System Address [S002: Rotary switch (black), S003: 2P DIP (blue)] Outdoor system address 1 refrigerant system only Link wiring Table 2. Setting the Number of Indoor Units [S004: Rotary switch (red), S005: 2P DIP (blue)] Number of S004 Setting Indoor Units...

  • Page 92: Indoor Unit Control Pcb

    2. Indoor Unit Control PCB 1. Indoor Unit Control PCB Switches and Functions Indoor unit control PCB T10: 6P plug (yellow): Used for remote control. (Refer to the remote control section.) (CN61) Control items: (1) Start/stop input (3) Start signal output EXCT: 2P plug (red): Can be used for demand control.

  • Page 93: For Ac Fan Motor (Cr-Uxrp71B-B)

    2. Indoor Unit Control PCB 1. For AC Fan Motor (CR-UXRP71B-B) EXCT (CN073) FAN DRIVE (CN032) 2. For DC Fan Motor (CR-SXRP56B-B) POWER LED (D002) OPTION FILTER (CN020) (CN060) (CN070) FAN DRIVE (CN032) (CN061) EEPROM (IC010) GRL (CN020) POWER LED (D002) FILTER (CN070) EEPROM (IC010) DISP...

  • Page 94: Cr1 (For Cr-Kr74Gxh56A/Khx0752~Khx1852) (Wall Mounted)

    2. Indoor Unit Control PCB 3. CR1 (for CR-KR74GXH56A/KHX0752~KHX1852) (Wall-Mounted) TRANS-S plug FAN DRIVE plug T10 plug OPTION plug CHK (test) pin DISP pin Room temperature EXCT plug (TA) sensor PCB and Functions If the fuse (F002) has blown, determine the cause and correct it.

  • Page 95: Cr1 (For Cr-Kr254Gxh56A/Khx2452) (Wall Mounted)

    2. Indoor Unit Control PCB 4. CR1 (for CR-KR254GXH56A/KHX2452) (Wall-Mounted) If the fuse (F002) has blown, determine the cause and correct it. Then change the socket from the OC plug to the EMG plug. Control circuit fuse (F002) EMG plug OC plug RC plug Microcomputer...

  • Page 96: Cr2 (For Pow-Kr74Gxh56/Khx0752~Khx2452) (Wall Mounted)

    2. Indoor Unit Control PCB 5. CR2 (for POW-KR74GXH56/KHX0752~KHX2452) (Wall-Mounted) TRANS-S plug OP1 plug Control circuit fuse (F201) 4-10 PCB and Functions T20 plug...

  • Page 97: Explanation Of Functions (Cr-Kxrp56An, Cr-Kxrp80An, Pow-Krp50A)

    2. Indoor Unit Control PCB 6. Explanation of Functions (CR-KXRP56AN, CR-KXRP80AN, POW-KRP50A) 6P fl ag (yellow): Used for remote control. (CN105) Control items: (for remote control) EXCT 2P plug (red): Can be used for demand control. When input is present, forces the unit to (CN009) operate with the thermostat OFF.
  • Page 98 2. Indoor Unit Control PCB OPTION (CN014) 6P (white): Outputs external signals as shown in the fi gure below. OPTION (white) DC 12V Indoor unit control PCB (CR1) Note: The relay must be installed at a distance of 6-9/16 ft. or less from the PCB. 4-12 PCB and Functions Relay (DC 12V, field supply) (Note)

  • Page 99: Section 5: Self-Diagnosis Function Table

    Contents 5. SELF-DIAGNOSIS FUNCTION TABLE 1. Self-Diagnosis Function Table ...5-2 Self-Diagnosis Function Table...
  • Page 100 1. Self-Diagnosis Function Table 1. Self-Diagnosis Function Table • Causes and corrections in instances when automatic address setting cannot be started The power LED (D53) on the outdoor unit control PCB does not turn ON. LED 1 and 2 on the outdoor unit control PCB do not turn OFF when the outdoor unit power is turned ON, and automatic address setting cannot be started.
  • Page 101 1. Self-Diagnosis Function Table Check that the indoor unit power is turned ON. Check that the inter-unit control wiring is connected correctly. (Check that there are no open circuits, short circuits, terminal plugs, incorrect wiring to the remote controller terminals, or similar problems.) Check that the remote controller wiring is connected correctly.
  • Page 102 1. Self-Diagnosis Function Table • The outdoor unit maintenance remote controller can be used to check the alarm display. The number of times that LED 1 and 2 blink on the outdoor unit control PCB can be used to check the alarm display. (Refer to “Checking the LED 1 and 2 Alarm Display on the Outdoor Unit Control PCB.”) Alarm code Outdoor unit failed to receive serial communication signals from indoor unit.

  • Page 103: Section 6: Service Checker

    Contents 1. Outdoor Unit Maintenance Remote Controller ...6-2 1. Over View ...6-2 2. Functions ...6-2 3. Ordinary Display Controls and Functions ...6-3 4. Monitoring Operations ...6-7 5. Outdoor Unit Alarm History Monitor ...6-8 6. Setting the Outdoor Unit EEPROM Data ...6-9 6.

  • Page 104: Outdoor Unit Maintenance Remote Controller

    1. Outdoor Unit Maintenance Remote Controller 1. Overview About the outdoor unit maintenance remote controller The outdoor unit utilizes non-volatile memory (EEPROM) on its PCB. This allows EEPROM data to replace the setting switches that were present on previous PCBs. The outdoor unit maintenance remote controller is used to set and change these EEPROM data.

  • Page 105: Ordinary Display Controls And Functions

    1. Outdoor Unit Maintenance Remote Controller ■ Temperature monitor Displays the temperature from each indoor/outdoor sensor. ■ Outdoor unit alarm history monitor Displays the outdoor unit alarm history. ■ Setting the outdoor unit EEPROM data Settings mode 1 and settings mode 2 can be used to make outdoor unit EEPROM data settings. 3.
  • Page 106 1. Outdoor Unit Maintenance Remote Controller Display (functions) The item codes can be changed with the Item code Outdoor unit alarm No. of connected indoor units Unit Nos. of connected indoor unit Operating status of indoor unit Thermostat ON status of indoor unit No.
  • Page 107 1. Outdoor Unit Maintenance Remote Controller XX-YY R.C. Displays the outdoor unit sub-bus address which is currently selected. XX = Outdoor unit system address (1 – 30) YY = Outdoor unit address (1 – 4) The locations where shown on Fig. 6-3. are displayed as Sample display (Fig.
  • Page 108 1. Outdoor Unit Maintenance Remote Controller Concerning the 7-segment 4-digit display of remote controller timer time The unit Nos. of connected units are indicated by four 7-segment digits Display of unit Nos. 1 Display of unit Nos. 21 The meaning of the colon changes in the same way to indicate unit Nos. up to 80. Sample displays of connected indoor unit Nos.

  • Page 109: Monitoring Operations

    1. Outdoor Unit Maintenance Remote Controller 4. Monitoring Operations Display the indoor unit and outdoor unit sensor temperatures. <Operating procedure> Press and hold the (CHECK) and 4 seconds or longer to engage temperature monitor mode. During temperature monitoring, (The display and operations are the same as for monitor mode using the indoor unit remote controller.) Press the (UNIT) button and select the indoor unit to monitor.

  • Page 110: Outdoor Unit Alarm History Monitor

    1. Outdoor Unit Maintenance Remote Controller 5. Outdoor Unit Alarm History Monitor Recalls and displays the outdoor unit alarm history. • This is for the outdoor unit only. Indoor unit alarms cannot be recalled. • The indoor unit alarm history can be viewed on the indoor unit remote controller or other controller.

  • Page 111: Setting The Outdoor Unit Eeprom Data

    1. Outdoor Unit Maintenance Remote Controller 6. Setting the Outdoor Unit EEPROM Data This function is used to make the outdoor unit EEPROM data settings. Setting mode 1 Press the (CHECK) button and the (VENTILATION) button simultaneously for 4 sec- onds or longer.
  • Page 112 1. Outdoor Unit Maintenance Remote Controller Setting mode 2 Press the (CHECK) button, button and the (CANCEL) button simultane- ously for 4 seconds or longer. Press the temperature setting buttons to change the item code. The item codes and setting data are shown in the table below. Press the timer time change the setting data.
  • Page 114 200706MDC...

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