5. TROUBLE DIAGNOSIS

Transcription

1 . TROBLE DIAGNOSIS -1. Contents of Remote Controller Switch Alarm Display Outdoor nit Control anel LED Display AC System Alarm Codes Inspection of arts (Outdoor nit) Symptom: Thermostat in OFF continues or cycles OFF & ON too frequently How to Clean Heat Exchanger How to Replace Fan Motor

2 -1. Contents of Remote Controller Switch Alarm Display ON: Blinking: OFF: ossible cause of malfunction ired remote control display ireless remote controller receiver display Operation Timer reparing Serial communication errors Missetting Remote controller is detecting error signal from indoor unit. Error in receiving serial communication signal (Signal from main indoor unit in case of group control) Ex: Auto address is not completed. Error in transmitting serial communication signal E01 E02 Operating lamp blinking Indoor unit is detecting error signal from remote controller (and system controller). E03 Indoor unit is detecting error signal from outdoor unit. Error in receiving serial communication signal hen turning on the power supply, the number of connected indoor units does not correspond to the number set. (Except R.C. address is 0. ) Outdoor unit failed to receive serial communication signals from indoor unit E04 E06 Heating ready lamp blinking Improper setting of indoor unit or remote controller. During auto address setting, number of connected units does not correspond to number set. Indoor unit communication error of group control wiring Indoor unit address setting is duplicated. Remote controller address connector (RC. ADR) is duplicated. (Duplication of main remote controller) Automatic address setting start is prohibited while auto-address setting in progress. Main unit duplication in simultaneous-operation multi control (detected outdoor unit) Error of main indoor unit in receiving serial communication signal from sub indoor units E08 E09 E12 E14 E18 Operating lamp blinking hen turning on the power supply, number of connected units does not correspond to number set. (Except R.C. address is 0. ) Automatic Address Alarm (The total capacity of indoor units is too low.) Automatic Address Alarm (The total capacity of indoor units is too high or the total number of indoor units is too many.) Connection problem of indoor/outdoor units. E1 E16 E20 Heating ready lamp blinking Main outdoor unit is detecting error signal from sub outdoor unit. E24 Improper setting Error of sub outdoor unit in receiving serial communication signal from main outdoor unit This alarm message shows when the indoor unit for multiple-use is not connected to the outdoor unit. Duplication of main indoor unit address setting in group control Group control wiring is connected to individual control indoor unit. Indoor unit address is not set. Capacity code of indoor unit is not set. 4-way valve operation failure Outdoor unit address duplication Outdoor unit capacity not set or invalid E29 L02 L03 L07 L08 L09 L18 L04 L10 Operating and heating ready lamps blinking simultaneously Operating and heating ready lamps blinking simultaneously Activation of protective device rotective device in indoor unit is activated. Indoor unit type setting error Thermal protector in indoor unit fan motor is activated. Improper wiring connections of ceiling panel Float switch is activated. Operation of protective function of fan inverter L Timer and heat ready lamp blinking altemately O2 sensor detect 14 Continued -2

3 ON: Blinking: OFF: ossible cause of malfunction ired remote control display ireless remote controller receiver display Operation Timer reparing Activation of protective device rotective device in outdoor unit is activated. Compressor discharge temperature trouble High pressure trouble AC power supply trouble Operating and heating ready lamp blinking altemately Insufficient gas level detected 1 Compressor overcurrent trouble 16 Outdoor unit fan motor trouble 22 Lack of IN compressor wiring, IN compressor actuation failure (including locked), DCCT failure 29 Group control error 31 Alarm valve open 13 Timer and heat ready lamp blinking altemately HIC trouble H31 Timer lamp blinking Thermistor fault Indoor thermistor is either open or damaged. Indoor coil temp. sensor (E1) Indoor coil temp. sensor (E3) Indoor suction air (room) temp. sensor (TA) F01 F03 F10 Operating and timer lamps blinking alternately Indoor discharge air temp. sensor (BL) F11 Outdoor thermistor is either open or damaged. Compressor discharge temperature sensor (TD) Inlet temperature sensor (C1) in heat exchanger Intermediate temperature sensor (C2) in heat exchanger F04 F06 F07 Operating and timer lamps blinking alternately Outdoor air temperature sensor (TO) F08 Compressor inlet suction temperature sensor (TS) F12 on indoor unit CB failure F29 Operating and timer lamp blinking simultaneously rotective device for compressor is activated rotective device for compressor is activated. Outdoor unit nonvolatile memory () trouble rimary (input) overcurrent detected F31 H01 Operating and timer lamp blinking simultaneously Timer lamp blinking AM trouble H02 rimary current CT sensor (current sensor) failure H03 Sensor failure, Compressor discharge temperature sensor (TD) disconnected H0-3

4 -2. Outdoor nit Control anel LED Display LED1 D302 LED2 D303 Display meaning ( : ON : Blinking : OFF ) 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. (Both ON) (OFF) (Both OFF) (ON) After power is turned ON (and automatic address setting is not in progress), 1 or more indoor units are confirmed in that system; however, the number of indoor units does not match the number that was set. Automatic address setting was completed successfully. (After the power is turned ON, the number of detected indoor units connected to that system matches the number that was set, and regular communications are occurring.) (Blinking alternately) Automatic address setting is in progress. (Blinking alternately) Alarm display LED 1 blinks M times, then LED 2 blinks N times. The cycle then repeats. M = 2: alarm 3: H alarm 4: E alarm : F alarm 6: L alarm N = Alarm. Example: LED 1 blinks 2 times, then LED 2 blinks 16 times. The cycle then repeats. Alarm is 16. LED 1 : Blinking LED 2 : ON M DON is in progress. (0.7 / 0.2) * LED 1 : Blinking LED 2 : OFF 04 (High pressure trouble) re-trip display (0. / 0.) LED 1 : Blinking LED 2 : OFF Other re-trip display * Blinking (0.7 / 0.2) indicates that the lamp illuminates for 0.7 seconds, and then is OFF 0.2 seconds. -4

5 -3. AC System Alarm Codes Alarms for outdoor units Alarm Code E01 E02 E03 E04 E0 E06 E08 E09 E12 E14 E1 E16 E18 E20 Alarm Meaning Remote Controller Reception Error Remote Controller Transmission Error Error in Indoor nit Receiving Signal from Remote Controller (central) Error in Indoor nit Receiving Signal from the Outdoor nit Error in Indoor nit Transmitting Signal to the Outdoor nit Outdoor nit Failed to Receive Serial Communication Signals from Indoor nit Duplicate Indoor nit Address Settings Error More Than One Remote Controller Set to Main Error Automatic Address Setting Start is rohibited while Auto-address Setting in rogress. Main nit duplication in Simultaneous-operation Multi Control (detected outdoor unit) Automatic Address Alarm (The total capacity of indoor units is too low.) Automatic Address Alarm (The total capacity of indoor units is too high or the total number of indoor units is too many.) Faulty Communication in Group Control iring Connection roblem of Indoor/Outdoor nits. F04 F06 F07 F08 F12 F31 Compressor Discharge Temperature Sensor (TD) Trouble Inlet Temperature Sensor (C1) in Heat Exchanger Trouble Intermediate Temperature Sensor (C2) in Heat Exchanger Trouble Outdoor Air Temperature Sensor (TO) Trouble Compressor Inlet Suction Temperature Sensor (TS) Trouble Outdoor nit nvolatile Memory () Trouble H01 H02 H03 H0 H31 rimary (input) Overcurrent Detected AM Trouble rimary Current CT Sensor (current sensor) Failure Sensor Failure, Compressor Discharge Temperature Sensor (TD) Disconnected HIC Trouble L04 L10 L13 L18 Outdoor nit Address Duplication Outdoor nit Capacity not Set or Invalid Indoor nit Type Setting Error 4-way alve Operation Failure Compressor Discharge Temperature Trouble High ressure Trouble AC ower Supply Trouble Alarm alve Open O2 Sensor Detect Insufficient Gas Level Detected Compressor Overcurrent Trouble Outdoor nit Fan Motor Trouble Lack of IN compressor wiring, IN compressor actuation failure (including locked), DCCT failure Group Control Error -

6 Symptoms and arts to Inspect Remote controller alarm display Alarm contents Judgement conditions Eliminating condition of alarm Judgement and correction 03 0 Abnormal discharge temperature error Discharge temp. detected at or above the specified value CT disconnected or AC power supply error Stops when temp. exceeds 106. Alarm output on pre-trips The current value transmitted from the microcomputer on the outdoor unit control substrate is low. hen no AC power input for more than 30 seconds to minutes : Single alarm Recovery at restart Recovery at restart 1. Check refrigerant cycle (gas leak). 2.Trouble with electronic expansion valve 3.Check discharge temperature sensor (TD). 1. Check outdoor unit control CB. 2. Lack of reactor wire 1 L18 Insufficient gas level detected. 4-way valve operation failure Judged after heating operating for minutes consecutively. Discharge temperature is 9 or higher. Electronic expansion valve is at Step 480. hen the above has continued for 1 minute. Indoor air sucking due to body thermostat max (E1 or E2) - TA < 4 The indoor unit heat exchanger temperature drops even though the compressor is switched on during the heating mode: To +20 < C1 re-trip 1 time Recovery at restart Recovery at restart 1.Check refrigerant cycle (gas leak). 2.Trouble with electronic expansion valve 3.Check outdoor unit valve opening. 1. Check 4-way valve. 2. Check 4-way valve wiring. 3. Check outdoor unit control CB. 04 High-pressure protection error High pressure switched ON OFF (Alarm is output when switch opened.) re-trip 4 times. Recovery at restart Overload operation of refrigerant cycle 22 Outdoor unit fan motor trouble Inverter protection circuit was activated, or lock was detected at outdoor unit fan motor. Inverter stops after alarm is detected. re-trip 10 times Recovery at restart 1.osition detection trouble. 2.Outdoor unit fan motor overcurrent rotection circuit is activated. Check outdoor unit control CB. Refer to outdoor unit fan judgement methods. 29 Lack of IN compressor wiring, IN compressor actuation failure, DCCT failure Inverter stops after alarm is detected. Alarm is output when inverter stops (pre-trip) consecutively 10 times. Recovery at restart 1.Stops immediately even when operations restarted. Layer short on the compressor 2.Check HIC circuit. iring trouble H31 HIC trouble re-trip consecutively 10 times Temperature dropped Heat sink and CB (HIC) Contact trouble -6

7 Check rior to Auto Address Setting If an outdoor unit displays an alarm, conduct this process after diagnosing the problem. 1 Auto Address 1-1 Is the power of the indoor unit(s) and outdoor unit(s) on? 2-1 ower on 2 Indoor/ outdoor control line 3 Installation or setting related Has the wiring of the indoor/outdoor control line been completed? Is it all connected? Has high voltage (over AC200) been applied to the control line circuit? Has the fuse on the control C board blown? (Check each board of the indoor unit(s) and outdoor unit(s).) Be sure that the indoor and outdoor units are connected with correct combination written in catalog. 2-2 Connect the wiring 2-3 The power line and indoor/outdoor control line are miswired. Turn off the power, check & correct the miswiring and then make connections of the indoor/outdoor control lines to the emergency side of all the control C boards and controllers Correct the connection 3-2 Is the indoor/outdoor control line connected to more than one outdoor unit? (Network wired?) Is the Terminal resistor select switch on the outdoor control C board set to just one unit? 3-4 Correct the setting Are other outdoor units using a duplicate setting? hen units are networked, first set the system address for each outdoor unit in the order and then run auto address setting. 3-6 Run the auto address setting. -7

8 E01 Remote Controller Reception Error (hen indoor unit(s) are connected) 1. Error Detection Method It is judged an error if no self-addressed communication is sent to the remote controller in a 3-minute period. hen a remote controller is set to sub remote controller. hen there are nine or more indoor units in a remote control group s wiring. hen the CHK (check pin) and/or TEST (test pin) on the indoor unit control C board are short circuited. The nonvolatile memory () is not installed or faulty when turning on the power. Indoor unit control C board error Remote controller check mode Malfunctions of the remote controller itself (reception circuit error) 2. Error Diagnosis 1 Auto Address 2 Group Control iring 3 Installation or setting related Is auto address setting complete? Is there an auto address setting error (Is the outdoor unit showing an alarm)? Conduct checks prior to auto address setting. Is that indoor unit under group control? Are there any indoor units with their power off in the remote control group s wiring? Are nine or more indoor units connected in one remote control group s wiring? as the remote control group s wiring changed after auto address setting was complete? Alternatively, were group settings changed in the remote control detailed settings mode? ower on 2-3 Correct the wiring main unit in the remote control group s wiring? Re-execute auto address setting. Are the CHK pin and TEST pin on the indoor unit control board Remove the short short-circuited? 3-2 Is the wireless remote controller connected to on the indoor unit s 3-3 control C board? 3- Disconnect the connector mentioned above on the C board of the indoor unit control C board, and see whether the E01 goes off after several minutes. (hen doing so, if two remote controllers are being used and the wireless remote controller is the main remote controller, set the other remote controller as the main.) Replace wireless remote control parts including wiring. 3- Is the LED blinking on the indoor unit s control C board? The nonvolatile memory () on the indoor unit s control C board is either not 3-6 installed, improperly installed or the nonvolatile memory is faulty. Correct this or after replacing the nonvolatile memory, write model data to it in the remote control detailed settings mode. 3-7 Correct the wiring Is there a short, miswiring, disconnection, wrong contact or grounding in the remote control s wiring? Replace the indoor unit s control board. Regarding the remote controller check, refer to the Reference Materials. For information on the procedures for replacing the nonvolatile memory () of the indoor unit and/or replacing the indoor unit s control board, refer to the manual that is packaged with the indoor unit service board

9 A : 4-way Cassette Type Indoor nit Control Board OTION TEST in CHK in RC A : Duct Type Indoor nit Control Board OTION TEST in CHK in RC A : Ceiling Type (T2 type) Indoor nit Control Board OTION TEST in CHK in RC -9 名称未設定-1 2 SM _AC-i.indb /08/06 10:41:24 21:42: /09/07

10 1. E02 Remote Controller Transmission Error Error Detection Method hen the remote controller itself cannot transmit. Or when it cannot receive the signal it transmitted itself, or when they are different and judged an error. Malfunction of the remote controller itself (transmit circuit error) 2. Error Diagnosis 1 Remote Control Group iring Is the indoor unit under group control? Are the wires 1 (white) & 2 (black) to the remote control group shorted or opened? 2 Group Is the wireless remote controller connected to on the indoor unit s 2-2 Control 2-1 control C board? 2-4 iring Disconnect the connector mentioned above on the board of the indoor unit control C board, and see whether the E02 goes off after several minutes. (hen doing so, if two remote controllers are being used and the wireless remote controller is the main remote controller, set the other remote controller as the main.) Replace wireless remote control parts including wiring. Is there a short, miswiring, open, wrong contact or grounding in the remote control s wiring? Correct the wiring Correct the wiring Replace the indoor unit s control C board Regarding the remote controller check, refer to the Reference Materials. For information on the procedures for replacing the nonvolatile memory () of the indoor unit and/or replacing the indoor unit s control board, refer to the manual that is packaged with the indoor unit service board. -10

11 E03 Error in Indoor nit Receiving Signal from Remote Controller (central) (hen indoor unit(s) are connected) 1. Error Detection Method It is judged an error when there is no communication from any remote controller (collectively) in a 3-minute period or if there is no communication from the central device in a 1-minute period. hen there was once communication, but during use the remote control wiring is opened or miswired. The line to the central control unit for indoor/outdoor operations is opened. Settings are made only for sub remote controller. The power to the central control unit is not on and remote controllers are not being used (or the indoor/outdoor operations line to the central control unit is opened). hen remote controller are not being used, only the sub remote controller is set up. 2. Error Diagnosis 1 Central control unit 2 Remote controller 3 Indoor unit control C board Is the central control unit connected? Is the central control unit s powered off? Are all the Main/Sub switches on the connected central control unit set to Sub? Disconnect the connector mentioned above on the control C board of the indoor unit control C board, and see whether the E03 goes off after several minutes. (hen doing so, if two remote controllers are being used and the wireless remote controller is the main remote controller, set the other remote controller as the main.) ower on Of the central control units that are connected, set only the uppermost central control unit to Main and the others to Sub. The order from top to bottom is communication adaptor system controller ON/OFF controller. Is the indoor/outdoor operations line connected to the central Correct the setting control unit opened? 2-1 Is the indoor unit under group control? Are the wires 1 (white) & 2 (black) to the remote control group Correct the setting opened, have wrong contact or grounded? 3-1 Is the wireless remote controller connected to on the indoor unit s 3-2 control C board? Replace wireless remote control parts including wiring. Is there a short, miswiring, open, wrong contact or grounding in the remote control s wiring? Correct the wiring Replace the indoor unit control board Regarding the remote controller check, refer to the Reference Materials. For information on the procedures for replacing the nonvolatile memory () of the indoor unit and/or replacing the indoor unit s control board, refer to the manual that is packaged with the indoor unit service board. ON Side ON S1 ON Side ON OFF Side OFF Side Central Control Main/Sub Switch Main: OFF Side Sub: ON Side System Controller Central Control Main/Sub Switch Main: OFF Side Sub: ON Side ON/OFF Controller -11

12 A : 4-way Cassette Type Indoor nit Control Board OTION TEST in CHK in RC CHK in RC A : Duct Type Indoor nit Control Board OTION TEST in A : Ceiling Type (T2 type) Indoor nit Control Board OTION TEST in CHK in RC -12 名称未設定-1 2 SM _AC-i.indb /08/06 10:41:32 21:42: /09/07

13 E04 Error in Indoor nit Receiving Signal from the Outdoor unit 1. Error Detection Method hen there is no communication within a 3-minute period from the outdoor unit. Or, judged an error when no reply comes from the outdoor unit. The outdoor unit is not turned on. hen the network of indoor/outdoor operation line was wired, the (SHORT) setting of the terminal resistor switch on the outdoor control C board was set on multiple units (four or more). hen the power was turned on after auto address setting was completed, the number of indoor units had been changed. Forgot to turn on the indoor unit. The CHK pin and/or TEST pin on the indoor unit s control C board are shorted. Forgot to install the nonvolatile memory () when replacing the indoor unit control C board. Mistakenly set the indoor unit address to t Set in the remote control s detailed setting mode. hen indoor unit addresses are duplicated. There is a short, open, wrong contact or grounding of the indoor/outdoor operation line. There is an error in the receiving circuit on the signal output C board (optional control C board). Malfunctions of the outdoor unit High voltage was applied (over AC200) in the indoor/outdoor operations line circuit. The thermistor inside the indoor unit is grounded. 2. Error Diagnosis 1 ower Source 2 Indoor/ outdoor control line 3. of Indoor nits 4 Indoor unit control C board Is/was the power to the outdoor unit cut off? Is the indoor unit powered off? Is the indoor/outdoor operation line shorted, opened, grounded or has a wrong contact? hen the network of indoor/outdoor operation line was wired, was the (SHORT) setting of the terminal resistor switch on the outdoor control C board set on multiple units (four or more)? as a high voltage (over AC200) applied in the indoor/outdoor operations line circuit? as the number of indoor units increased or decreased after auto address setting was complete? Conduct checks prior to auto address setting. Check the indoor unit addresses from the remote control s detailed settings mode. Is it t Set (99), or is the indoor unit s address duplicated? Are the CHK pin and/or TEST pin on the indoor unit control C board short-circuited? Is the wireless remote controller connected to on the indoor unit s control C board? Disconnect the connector mentioned above on the control C board of the indoor unit control C board, and see whether the E04 goes off after several minutes. (hen doing so, if two remote controllers are being used and the wireless remote controller is the main remote controller, set the other remote controller as the main.) Replace wireless remote control parts including wiring. Is the LED on the indoor unit control C board blinking? The nonvolatile memory () on the indoor unit s control C board is either not installed, improperly installed or the nonvolatile memory is faulty. Correct this or after replacing the nonvolatile memory, write model data to it in the remote control detailed settings mode. Are all the remote controllers of the other indoor units connected to that outdoor unit displaying E04? -13 After turning the power on, wait three minutes 1-2 ower on 2-1 Correct the wiring 2-2 rmally the (SHORT) setting is just one unit Remove the short Replace the outdoor unit control board Replace the indoor unit control board

14 Regarding the remote controller check, refer to the Reference Materials. For information on the procedures for replacing the nonvolatile memory () of the indoor unit and/or replacing the indoor unit s control board, refer to the manual that is packaged with the indoor unit service board. Outdoor nit Control CB CR-0E1E : p side (-0E1E) (for single-phase outdoor unit CB) A : (-60E1E, -71E1E) (for single-phase outdoor unit CB) TERMINAL TERMINAL A : (-100E1E) (for single-phase outdoor unit CB) A74684 : (-12E1E, -140E1E) (for single-phase outdoor unit CB) TERMINAL TERMINAL -14 SM _AC-i.indb /09/07 10:41:36

15 CR-60EY1E : p side (-60EY1E) (for single-phase outdoor unit CB) CR-71EY1E : p side (-71EY1E) (for single-phase outdoor unit CB) TERMINAL A : (-100EY1E) (for single-phase outdoor unit CB) TERMINAL TERMINAL A : (-12EY1E) (for single-phase outdoor unit CB) TERMINAL -1 SM _AC-i.indb /09/07 10:41:46

16 A : (-71E1E8) A : (-100E1E8, -12E1E8, -140E1E8) A74796 : (-140EY1E8) (for 3-phase outdoor unit CB) TERMINAL A : (-100EY1E8, -12EY1E8) (for 3-phase outdoor unit CB) TERMINAL Indoor nit Control CB A : 4-way Cassette Type A : Duct Type TEST pin RC OTION CHK pin TEST pin RC OTION CHK pin A : Ceiling Type (T2 type) TEST pin OTION RC CHK pin -16 名称未設定-1 3 SM _AC-i.indb /08/ /09/07 21:42:47 10:41:1

17 E0 Error in Indoor nit Transmitting Signal to the Outdoor nit 1. Error Detection Method It is judged an error when a unit itself cannot receive a signal that it has sent. Indoor unit control C board error The setting of the terminal resistor select switch on the outdoor unit main C board is set incorrectly. 2. Error Diagnosis 1 Indoor unit control C board Is the indoor/outdoor operation line connected to more than one 1-1 outdoor unit? (Network wired?) Is the SHORT on the terminal resistor select switch on the outdoor 1-2 main C board set to one unit, and the others are OEN? Is the terminal resistor select switch on the outdoor main C board 1-3 set to OEN? 1-4 Is the indoor/outdoor operation line opened or shorted? Set the SHORT to one unit only Make the SHORT setting 1-4 Correct the wiring 1-1- Replace the indoor unit control C board. For information on the procedures for replacing the indoor unit s control C board, refer to the manual that is packaged with the indoor unit service board. CR-0E1E : p side (-0E1E) (for single-phase outdoor unit CB) A : (-60E1E, -71E1E) (for single-phase outdoor unit CB) TERMINAL TERMINAL -17 SM _AC-i.indb /09/07 10:41:4

18 A : (-100E1E) (for single-phase outdoor unit CB) A74684 : (-12E1E, -140E1E) (for single-phase outdoor unit CB) TERMINAL TERMINAL CR-60EY1E : p side (-60EY1E) (for single-phase outdoor unit CB) CR-71EY1E : p side (-71EY1E) (for single-phase outdoor unit CB) TERMINAL TERMINAL -18 SM _AC-i.indb /09/07 10:41:6

19 A : (-100EY1E) (for single-phase outdoor unit CB) TERMINAL A : (-12EY1E) (for single-phase outdoor unit CB) TERMINAL A : (-71E1E8) A : (-100E1E8, -12E1E8, -140E1E8) A74796 : (-140EY1E8) (for 3-phase outdoor unit CB) TERMINAL A : (-100EY1E8, -12EY1E8) (for 3-phase outdoor unit CB) TERMINAL -19 SM _AC-i.indb /09/07 10:42:00

20 E06 Outdoor nit Failed to Receive Serial Communication Signals from Indoor nit (hen indoor unit(s) are connected) 1. Error Detection Method It is judged an error when there is no transmission (reply) from the indoor unit to the outdoor unit for a period of three minutes. The indoor unit is not turned on. The DIS pin of the indoor unit is shorted. There is a short, open, wrong contact or grounding of the indoor/outdoor operation line. The signal output control C board (optional control C board) inside the indoor unit has failed. The thermistor inside the indoor unit is grounded. 2. Error Diagnosis 1 Indoor unit power 2 Indoor/ outdoor operation line 3 Indoor units control C board ower on 1-1 Is the indoor unit powered off? Is the indoor/outdoor operation line shorted, opened, grounded or has a wrong contact? 3-1 Are the DIS pin and CHK pin on the indoor unit control C board short-circuited? 3-2 Is the wireless remote controller connected to on the indoor unit s control C board? Correct the wiring 3-1 Remove the short Disconnect the connector mentioned above on the control C board of the indoor unit control C board, and see whether the E06 goes off after several minutes. (hen doing so, if two remote controllers are being used and the wireless remote controller is the main remote 3- controller, set the other remote controller as the main.) 3-4 Replace wireless remote control parts including wiring. 3- Indoor unit control C board failure Replace board. For information on the procedures for replacing the indoor unit s control board, refer to the manual that is packaged with the indoor unit control CB. A : 4-way Cassette Type A : Duct Type TEST pin RC OTION CHK pin TEST pin RC OTION CHK pin A : Ceiling Type (T2 type) TEST pin OTION RC CHK pin -20 名称未設定-1 4 SM _AC-i.indb /08/06 10:42:03 21:42:0 2013/09/07

21 E08 Duplicate Indoor nit Address Settings Error 1. Error Detection Method It is judged an error if the addresses of indoor units are duplicated. The indoor unit address settings are duplicated in the remote control detailed settings mode. The multiple unit DIS pin is shorted across the indoor unit whose address is t Set. 2. Error Diagnosis 1 Indoor unit control C board 1-1 Is the DIS pin on the indoor unit control C board shorted? 1-2 Remove the short Conduct checks prior to auto address setting. Does E08 fail to go off even after running auto address setting again? 1-4 The nonvolatile memory () on the indoor unit board has failed. 1-3 Replace the. Do not make changes to indoor unit addresses with the detailed settings of the remote 1-4 controller. Make them in the remote control address change mode. For information on the procedures for replacing the nonvolatile memory () of the indoor unit, refer to the manual that is packaged with the indoor unit service board. A : 4-way Cassette Type A : Duct Type DIS pin DIS pin A : Ceiling Type (T2 type) DIS pin -21 名称未設定-1 SM _AC-i.indb /08/06 10:42:0 21:42:1 2013/09/07

22 E09 More Than One Remote Controller Set to Main Error 1. Error Detection Method It is judged an error when more than one remote controller in a remote control group is set as the main remote controller. Forgot to set one remote controller to sub in a 2-remote control group. hen using one wireless and one wired remote controller in a control group, forgot to set one of them to sub. 2. Error Diagnosis 1 Remote controller 1-1 Set one of the 2 remote controllers to sub. Method for setting a remote controller to sub (CZ-RTC2) 1. ress and hold both + buttons for 4 seconds or longer. 2. This will display, the item 01 and the setting data 0001 or the like on the remote controller s display. 3. ress Timer / buttons to switch the setting data to (0000:SB 0001:Main) 4. ress button (Once the display changes from flashing to steady, the setting is complete).. Once you press button, the remote controller returns to its normal display. ireless remote controller CZ-RS2 Screw Cable clamp ON S003 (#3) Sub: ON Main: OFF CZ-RST2 CZ-RST3 CB cover Receiver CB Adjustable Corner Cap S003 S003 (#3) Sub: ON Main: OFF CZ-RSC2 CZ-RSL2 DI Switch 3 S003 (#3) Sub: I Main: O Main/Sub Switch -22

23 1. E12Automatic Address Setting Start is rohibited while Auto-address Setting in rogress. Error Detection Method It is judged an error if a command to start auto address setting comes from another controller during auto address setting. This occurs in a system that has more than one outdoor unit and operating lines among the indoor/outdoor units (networked wiring), when an instruction to start auto address setting is given from another controller during the auto address setting process. 2. Error Diagnosis 1 Auto Address 1-1 hen one controller in a networked system is running auto address setting, it is not possible to start auto address setting from another controller. ait until the auto address setting in progress finishes. -23

24 E14 Main nit duplication in Simultaneous-operation Multi Control (detected outdoor unit) 1. Error Detection Method It is judged an error that the main units are duplicated in the indoor unit group. Main unit setting was made in the indoor unit group control setting of the remote control detailed settings mode. 2. Failure Diagnosis 1 Group Control Address 2 Installation & Setting Are multiple indoor units set up as the main unit? 2-1 Set up only one indoor unit as the main unit and other indoor units to the sub-unit. Carry out the auto address setting

25 E1 Automatic Address Alarm (The total capacity of indoor units is too low.) 1. Error Detection Method Connecting indoor unit It is judged an error the total capacity of indoor units replied by communication is lower than that of outdoor unit. The total capacity of indoor units is lower than that of outdoor unit. Some indoor unit(s) are connected but power is not turned on. The CHK pin (CN062/CN071) and/or TEST pin (CN064) of the indoor unit is shorted when its power is turned on. High voltage was applied (over AC200) in the indoor/outdoor operations line circuit. 2. Error Diagnosis 1 ower Source 1-1 Is the indoor unit powered off? 2 Indoor/ 2-1 Is the indoor/outdoor control line opened or shorted? outdoor control line as a high voltage (over AC200) applied in the indoor/outdoor 2-2 operations line circuit? 3. of Indoor nits 4 Indoor unit control C board 3-1 as the number of indoor units changed after auto address setting finished? ower on 2-1 Correct the wiring Conduct checks prior to auto address setting. 4-1 Are the CHK pin and TEST pin on the indoor unit control board short-circuited? 4-2 Is the wireless remote controller connected to on the indoor unit s control C board? Remove the short Disconnect the connector mentioned above on the control C board of the indoor unit control C board and see whether the E1 goes off after several minutes. (hen doing so, if two remote controllers are being used and the wireless remote controller is the main remote 4- controller, set the other remote controller as the main.) 4-4 Replace wireless remote control parts including wiring Is the LED blinking on the indoor unit s control C board? -1 The nonvolatile memory () on the indoor unit s control board is either not installed, 4-6 improperly installed or the nonvolatile memory is faulty. Correct this or after replacing the nonvolatile memory, write model data to it in the remote control detailed settings mode. Outdoor unit control -1 Check all items under the section Check rior to Auto Address Setting. C board For information on the procedures for replacing the nonvolatile memory () of the indoor unit, refer to the manual that is packaged with the indoor unit service board. For information on the remote control s detailed settings, refer to the Reference Materials. A : 4-way Cassette Type A : Duct Type TEST pin CHK pin TEST pin OTION OTION RC RC CHK pin A : Ceiling Type (T2 type) TEST pin CHK pin OTION RC -2 名称未設定-1 6 SM _AC-i.indb /08/06 10:42:07 21:42:3 2013/09/07

26 1. E16 Automatic Address Alarm (The total capacity of indoor units is too high.) Error Detection Method It is judged an error the total capacity of indoor units is too high or the total number of indoor units is too many. The total capacity of indoor units is too high. The total number of indoor units is too many. 2. Error Diagnosis 1 Auto Address 1-1 Check all items under the section Check rior to Auto Address Setting. -26

27 E18 Faulty Communication in Group Control iring 1. Error Detection Method hen the main remote controller cannot communicate with a sub remote controller in the remote control group. It is judged an error if a sub remote controller in a remote control group fails to communicate with the main remote controller for a period of three minutes. An indoor unit within the control group does not have its power on. The CHK pin and TEXT pin on the indoor unit in the control group are shorted. The DIS pin of an indoor unit sub remote controller in the control group is shorted. Remote control group wiring is opened. More than one indoor unit in the control group is set to Main. An indoor unit in the control group is set to Separate. 2. Error Diagnosis 1 Indoor nit ower on 1-1 Is the indoor unit powered off? 1-2 Are the CHK pin, TEST pin and DIS pin on the indoor unit control C board short-circuited? 2 Substitute Sub Remote Controller 2-1 Is the remote control group s wiring opened? 1-2 Remove the short 2-1 Correct the wiring 2-2 Check the group settings (Item Code 14) from the remote control s 2-2 detailed settings mode. Is the main remote controller (1) set to more than one remote controller or to separate (0)? 2-3 Is the wiring of the remote control group wired according to the wiring diagram? Indoor unit control CB Run the auto address setting again. 2- Run the auto address setting again after correcting the wiring of the remote control group. 3-2 Is the wireless remote controller connected to on the indoor unit s 3-1 control C board? 3-4 Disconnect the connector mentioned above on the control C board of the indoor unit control C board, and see whether the E18 goes off after several minutes. (hen doing so, if two remote controllers are being used and the wireless remote controller is the main remote 3-4 controller, set the other remote controller as the main.) 3-3 Replace wireless remote control parts including wiring. 3-4 Replace the indoor unit control C board. For information on the remote control s detailed settings, refer to the Reference Materials. For information on the procedures for replacing the Indoor unit control CB, refer to the manual that is packaged with the indoor unit service board. A : 4-way Cassette Type A : Duct Type TEST pin CHK pin TEST pin OTION OTION RC RC CHK pin A : Ceiling Type (T2 type) TEST pin CHK pin OTION RC -27 名称未設定-1 7 SM _AC-i.indb /08/06 10:42:07 21:42:3 2013/09/07

28 1. E20 Connection roblem of Indoor/Outdoor nits Error Detection Method The outdoor unit detects an error at following cases during auto address setting. Indoor unit is not turned On. Indoor/outdoor control line is disconnected and also detects an error in the following cases when the outdoor unit is turned On. Address(es) of indoor unit(s) are not assigned correctly. Capacity of indoor/outdoor units is mismatched. Total number of indoor units is too many. 2. Error Diagnosis 1 Indoor nit Are the address(es) of indoor unit(s) assigned correctly? 1-2 Set its address Are the indoor units turned on? 1-3 ower on Be sure that the indoor and outdoor units are connected with correct combination written in catalog. 1-4 Correct the connection The indoor/outdoor control line may be disconnected somewhere between the indoor unit(s) and the outdoor unit. Make sure the indoor/outdoor control line is connected. -28

29 F04 Compressor Discharge Temperature Sensor (TD) Trouble 1. Error Detection Method It is judged an error based on the criteria listed below. Open circuit or Short circuit 2. Error Diagnosis 1 Sensor 2 C board 3 Operating status Sensor connector is connected to C board properly. Sensor is correctly installed at holder side. Abnormal temperature exists even after replacing sensor. Resistance between connector pins on C board is less than 1 k ohm Abnormal temperature exists even after replacing C board. eripheral temperature of outdoor unit is over 46 C. Tends to have insufficient refrigerant charge in the system. 1-2 Reconnect and check Replace sensor Correct and see what happens See what happens. Replace C board See what happens. Correct 3-2 Adjust the amount of refrigerant Check noise. -29

30 F06 Inlet Temperature Sensor (C1) in Heat Exchanger Trouble 1. Error Detection Method In case of open or short 2. Error Diagnosis 1 Sensor Trouble Is the connector properly connected to CB? Is the resistor between the sockets infinity or 0Ω? 1-2 Reconnect & check Replace sensor Control CB Failure 2-1 Outdoor unit control CB failure Replace CB with a new one. -30

31 F07 Intermediate Temperature Sensor (C2) in Heat Exchanger Trouble 1. Error Detection Method It is judged an error when open circuit or short circuit. 2. Error Diagnosis 1 Sensor 1-1 Sensor connector is connected to C board properly. 1-2 Reconnect and check 1-2 Resistance between sockets is infinity or 0 ohm. Replace sensor C board 2-1 Replace C board because of outdoor control C board failure. -31

32 F08 Outdoor Air Temperature Sensor (TO) Trouble 1. Error Detection Method It is judged an error when open circuit or short circuit. 2. Error Diagnosis 1 Sensor 1-1 Sensor connector is connected to C board properly. 1-2 Reconnect and check 1-2 Resistance between sockets is infinity or 0 ohm. Replace sensor C board 2-1 Replace C board because of outdoor control C board failure. -32

33 F12 Compressor inlet Suction Temperature Sensor (TS) Trouble 1. Error Detection Method It is judged an error when open circuit or short circuit. 2. Error Diagnosis 1 Sensor 1-1 Sensor connector is connected to C board properly. 1-2 Reconnect and check 1-2 Resistance between sockets is infinity or 0 ohm. Replace sensor Outdoor control C board 2-1 Replace C board because of outdoor control C board failure. -33

34 1. F31 Outdoor nit nvolatile Memory () Trouble Error Detection Method It is judged an error based on the criteria listed below. hen power initially turned ON for the first time, nonvolatile memory () is not installed. Read values after writing onto nonvolatile memory () is inconsistent. 2. Error Diagnosis 1 C board 1-1 Does exist on the control C board? 1-2 Install 1-2 Is installed properly? (Check: Bent IC pin or incorrect installation, etc.) 1-3 Correct 1-3 Incorrect Replace with correct. -34

35 H01 rimary (input) Overcurrent Detected 1. Error Detection Method rimary current effective value detected overcurrent (trip current value). Trip current value hp = horse power Single-phase model 2. hp 3 hp 4 hp hp 6 hp Trip current value 3-phase model hp = horse power 4 hp hp 6 hp Heating 20.0A 20.0A 27.0A 29.0A 30.0A Heating 12.A 13.A 14.A Cooling 18.A 18.A 27.0A 29.0A 30.0A Cooling 12.0A 12.6A 13.0A 2. Error Diagnosis 1 ower supply* 1-1 t satisfied with +10% rated supply voltage 1-2 Extreme voltage fluctuations 1-3 Extreme distortion of voltage waveform 1-4 Instantaneous blackout may sometimes occur. 2 C board wiring 2-1 Has FSE 1/FSE 2 blown? Check the electrical conduction with tester. 2-2 Loose electrical wire connection Check power supply 1-2 Check power supply 1-3 Check power supply 1-4 Check power supply Correct wiring Replace CR board. * Check not only in the outdoor unit stop mode but in the drive mode. CR-0E1E : bottom (-0E1E) (for single-phase outdoor unit CB) A : (-60E1E, -71E1E) (for single-phase outdoor unit CB) FSE1 F001-3 SM _AC-i.indb /09/07 10:42:09

36 A : (-100E1E) (for single-phase outdoor unit CB) A74684 : (-12E1E, -140E1E) (for single-phase outdoor unit CB) FSE1 FSE1 CR-60EY1E : bottom (-60EY1E) (for single-phase outdoor unit CB) CR-71EY1E : bottom (-71EY1E) (for single-phase outdoor unit CB) F001 F SM _AC-i.indb /09/07 10:42:11

37 A : (-100EY1E) (for single-phase outdoor unit CB) A : (-12EY1E) (for single-phase outdoor unit CB) FSE1 FSE1 A : (-71E1E8) A : (-100E1E8, -12E1E8, -140E1E8) A74796 : (-140EY1E8) (for 3-phase outdoor unit CB) FSE1 A : (-100EY1E8, -12EY1E8) (for 3-phase outdoor unit CB) FSE1-37 SM _AC-i.indb /09/07 10:42:1

38 H02 AM Trouble (Single-phase only) 1. Error Detection Method Error is detected by over-voltage and overcurrent of DC side. 2. Error Diagnosis 1 ower supply* t satisfied with +10% rated supply voltage Extreme voltage fluctuations Check power supply 1-2 Check power supply Extreme distortion of voltage waveform Check power supply C board wiring 2-1 Loose electrical wire connection Correct connection Is HIC C board connector (CN-AM) poorly connected or opened with wire? Correct connection or wiring Replace HIC C board. * Check not only in the outdoor unit stop mode but in the drive mode. -38

39 H03 rimary Current CT Sensor (current sensor) Failure 1. Error Detection Method It is judged an error based on the criteria listed below. If 18A or greater is detected when the compressor is stopped (alarm triggered even if the connector is unplugged). If no current is detected even though a compressor is running. 2. Error Diagnosis 1 Check the control C board 1-1 Turn the power on again and run the outdoor unit. Is alarm occurred after operation? Replace CR board. See what happens. -39

40 H0 Sensor Failure, Compressor Discharge Temperature Sensor (TD) Disconnected 1. Error Detection Method (In case of outdoor temperature over C) For 10 minutes since started, variation of discharge temperature is always detected within 2 C comparing with the temperature just before starting. (In case of outdoor temperature less than C) For 30 minutes since started, variation of discharge temperature is always detected within 2 C comparing with the temperature just before starting. 1 Sensor Trouble Is the sensor properly installed at the holder side? Replace the sensor with a new one. 1-2 Reinstall correctly. -40

41 H31 HIC Trouble 1. Error Detection Method It is judged an error if the computer detects an error signal from the HIC. An error signal is issued by the HIC if abnormal heat occurs inside the HIC or if there is an overcurrent. However, it is judged an error in the same way if the signal line from the HIC is not connected properly or opened. HIC overcurrent due to HIC fault HIC abnormal heat caused by defective HIC or HIC radiation error Signal line is not connected properly or opened between the HIC and the outdoor CR board. 2. Error Diagnosis 1 iring between HIC & outdoor control C board 2 Check the outdoor unit CR C board 3 HIC poor radiation 4 HIC overcurrent The wiring (power cord and signal line) between the HIC and the outdoor CR board is connected properly. Everything is normal in the wiring (power cord & signal line) between the HIC and the outdoor CR board. Check the wiring one by one with a tester if there is opened and grounding. The connector CN-RY1 on the CR C board is connected properly (locked). (3-phase only) The heat dissipating surface on the back of the HIC is in good contact with the heat sink (heat dissipating fins) of the electrical box. Check for looseness in the fastening screws and the condition of the heat-conducting putty. A good flow of cooling air passes through the heat sink (heat dissipating fins) of the electrical box. Check for debris blocking the fins. The results of the pass/fail tests for the following HIC board IM show it to be outside the range of the resistance of a conforming part. 1-2 Correct wiring (connector) : Single-phase model 2-1 : 3-phase model Replace wiring Correct wiring (connector) Remove foreign matter Replace the HIC C board Tighten screw(s), add putty The inverter compressor was stopped/started more than 10 times and it triggered H31 at a high rate. If alarm code 16 occurs at times, refer to the alarm code 16. Replace the HIC C board Refer to alarm code 16 HIC board IM ass/fail Tests Measure with an analog tester. (Set to the k ohm range) Measure the board by itself. (Remove wires connected from other parts.) Measure using IM terminals. Conforming part resistance value (measure with an analog tester) Tester terminals + N - N Resistance value (ohm) 1 k to k 1 k to k 1 k to k k to 10 k 100 k to 100 k to 100 k to 100 k to Tester terminals - N + Resistance value (ohm) 100 k to 100 k to 100 k to 1 k to k 1 k to k 1 k to k Excepting the parts of 100 k to value is 0 = short-circuit., it is acceptable if a small resistance value appears as a reference value unless the -41

42 Tester terminals + HIC+ - Resistance value (ohm) H I C HIC- 1 k to 10 k 1 k to 10 k 1 k to 10 k k to 20 k 20 k to 20 k to 20 k to HIC+ 20 k to Tester terminals - H I C+ + Resistance value (ohm) 20 k to Excepting the parts of 20 k to 20 k to HIC 1 k to 10 k 1 k to 10 k 1 k to 10 k 20 k to, it is acceptable if a small resistance value appears as a reference value unless the value is 0 = short-circuit. Outdoor nit Control HIC CB Outdoor nit Control CB A74689 : (-60E1E, -71E1E) (for single-phase outdoor unit HIC CB) CR-0E1E : bottom (-0E1E) (for single-phase outdoor unit CB) N N -42 SM _AC-i.indb /09/07 10:42:20

43 Outdoor nit Control HIC CB A : (-12E1E, -140E1E) (for single-phase outdoor unit HIC CB) A : (-100E1E) (for single-phase outdoor unit HIC CB) N N Outdoor nit Control CB CR-60EY1E : bottom (-60EY1E) (for single-phase outdoor unit CB) N CR-71EY1E : bottom (-71EY1E) (for single-phase outdoor unit CB) N -43 SM _AC-i.indb /09/07 10:42:21

44 A : (-100EY1E) (for single-phase outdoor unit HIC CB) N A : (-12EY1E) (for single-phase outdoor unit HIC CB) N A : (-71E1E8) A : (-100E1E8, -12E1E8, -140E1E8, -140EY1E8) (for 3-phase outdoor unit HIC CB) A : (-100EY1E8, -12EY1E8) (for 3-phase outdoor unit HIC CB) N N Outdoor nit Control CB A : (-71E1E8) A : (-100E1E8, -12E1E8, -140E1E8) A74796 : (-140EY1E8) (for 3-phase outdoor unit CB) CN-RY1 A : (-100EY1E8, -12EY1E8) (for 3-phase outdoor unit CB) CN-RY1-44 SM _AC-i.indb /09/07 10:42:26

45 1. L04 Outdoor nit Address Duplication Error Detection Method It is judged an error when the identical self-address communication on the indoor and outdoor wirings is received over times within 3 minutes. 2. Error Diagnosis 1 System Are other outdoor units using a duplicate setting? address Installation hen units are networked, first set the system address for each outdoor unit in the order or setting and then run auto address setting. related 2-2 Run the auto address setting. -4

46 L10 Outdoor nit Capacity not Set or Invalid 1. Error Detection Method It is judged an error when outdoor unit capacity not yet setup or systematically unauthorized setting. 2. Error Diagnosis 1 Check the control C board 2 Installation or setting related as replaced when C board was replaced? 2-1 Replace Set an applicable capacity value on the item code 81 display of maintenance remote controller. Check : Connect the outdoor maintenance remote controller and check whether item code 81 outdoor capacity value shows 0 or unauthorized capacity is set on the detailed setting mode display of the outdoor. If the capacity value of the item code 81 with the outdoor maintenance remote controller is incorrect, recorrect and set it again. * After setting the capacity value, be sure to reset the power supply switches of both indoor and outdoor units. -46

47 L13 Indoor nit Type Setting Error 1. Error Detection method Discordance model(s) between outdoor and indoor units are detected. 1 Discordance nit 1-1 Are models for outdoor and indoor units matched respectively? (Ex: Are multiple indoor units connected to commercial outdoor units?) 2 Installation Check the indoor unit s motor valve with the remote control detailed Failure 2-1 settings mode (2C code) and commercial indoor unit is set to 2 and multiple indoor unit is 0. 3 Operating ires for Indoor & Outdoor nits Replace indoor units. 3-1 Change installation. Check whether or not indoor and outdoor unit operating wires are short circuit, disconnection, loose connection or earth fault. -47

48 1. L18 4-way alve Operation Failure Error Detection Method It is judged an error when during heating operation (Comp. ON), the highest detected temperature at an outdoor unit heat exchanger (C1) was 20 C or more above the outdoor air temperature (Air Temp.) continuously for minutes or longer. 2. Error Diagnosis 1 C board wiring 1-1 Is the connector wired from the 4-AY valve plugged in the CN-20S connector on the HIC C board properly? 1-2 Correct connector 1-2 Has the 4-way valve wiring become opened? Correct wiring Is the wire from the coil for controlling the 4-way valve firmly connected to the 4-way valve? 2-1 Correct connector 2 4-way valve 2-1 During heating mode (Comp. ON), insert and remove the connector wired from the 4-AY valve into or from CN-20S connector on the HIC C board. At the same time, does the ON & OFF sounds occur from the 4-way valve? 2-2 Replace HIC C board 2-2 During heating mode (Comp. ON), does the alarm code L18 reproduce for minutes or longer after insertion and removal of CN-20S connector wired from the 4-way valve connector on the HIC C board? 2-3 See what happens 2-3 The parts inside the 4-way valve might have fixed at the cooling side. Replace the 4-way valve -48

49 03 Compressor Discharge Temperature Trouble 1. Error Detection Method hen the discharge temperature is over 106 C. 2. Error Diagnosis 1 Adjustment to refrigerant charge 2 Blockage in refrigerant circuit t additional refrigerant charged Tends to have insufficient refrigerant charge in the system. Service valve inside the outdoor unit closed Are the tubes clogged? Additional refrigerant charge 2-2 Adjust the refrigerant amount Replace CR board Open service valve 2-2 Avoid clogging Is the outdoor unit s electronic control valve operating correctly? (Check for debris clogging the electronic control valve, a problem with the electronical coil and/or the control C board.) Is it observable difference in status of the dew or frost between the strainer s primary and secondary sides? 2-4 Replace the electronic control valve Replace the strainer Replace CR board -49

50 1. 04 High ressure Trouble Error Detection Method It is judged an error if the internal circuit of the high pressure switch is dead. The electronic circuitry of the high pressure switch is cut off if the pressure at the pressure sensor port of the high pressure switch reaches 3.80 Ma. Once it is cut off, it remains cut off until the pressure drops to 3.1 Ma. The high pressure switch is malfunctioning. Service valve inside the outdoor unit closed There is a short air circuit through the outdoor unit s heat exchanger. (when cooling) The outdoor unit s fan is broken. (when cooling) The outdoor unit s heat exchanger is clogged. (when cooling) There is a short air circuit at the indoor unit. (when heating) The filter of the indoor unit is clogged. (when heating) The fan of the indoor unit is broken or the fan motor is malfunctioning. (when heating) The refrigerant circuit is closed and the high pressure is increasing abnormally high. (solenoid valve or expansion valve not activated, a stuck check valve, etc.) Refrigerant overcharged. Nitrogen or air contaminated in the refrigerant system 2. Error Diagnosis 1 High pressure switch 2 Service valve 3 roblem around the heat exchanger The socket of the high pressure switch is securely inserted in the C board. The wiring is not opened. Even if parts near the high pressure switch are shaken quite a lot, the high pressure cutoff will be activated. Even if the covering is in good condition, in several cases vibration has caused wiring inside to open. Service valve inside the outdoor unit closed 1-2 Correct connection and/or wiring Replace the high pressure switch (wiring) 2-1 Open the service valve 2-2 There is an extreme difference in temperature in/out of the service 2-3 valve. 3-1 Check the flare connection, someone may have forgotten to remove the bonnet. If there is a problem within the service valve, replace the valve. hile cooling is operating an alarm is occurred. The intake temperature (ambient temperature) of the outdoor unit s heat exchanger is above 46 C. The outdoor unit s heat exchanger is clogged. Check whether the outdoor unit fan is normal or if the sockets are firmly pressed onto the plugs on the outdoor C board, as well as if any wiring is opened. Are these checking finished without fail? hile heating is operating an alarm is occurred revent air short circuit 3-3 Clean the heat exchanger Replace the outdoor unit fan. Correct connection and/or wiring

51 3 roblem around the heat exchanger The intake temperature (ambient temperature) of the indoor unit is above 36 C. The filter of the indoor unit is clogged. revent air short circuit 3-7 Clean the filter The fan of the indoor unit is broken or the fan motor is faulty. Replace the indoor fan (motor) Blockage in the refrigerant circuit 4-1 Is the outdoor unit s electronic control valve operating correctly? (Check for debris clogging the electronic control valve, a problem with the electronical coil and/or the control C board.) 4-3 Repair the electronic control valve of the outdoor unit 4-2 The indoor unit s expansion valve is operating correctly. (check for debris clogging the valve, a problem with the electronical coil and/or the control C board) 4-3 Repair the expansion valve of the indoor unit If an alarm is occurred with the high pressure below 3.80 Ma, with the pressure measured as displayed by the manifold gauge, check the check valve in the compressor discharge line. Are these checking finished without fail? The electronic control valve is faulty. In systems where the solenoid valve kits and the ice thermal storage tank are connected, check these solenoid valves. 4-4 Replace the check valve in the compressor discharge line Replace the electronic control valve and/or solenoid valve. -1 Overcharging -1 Error occurs when the system is operating in cooling mode Error occurs when the system is operating in heating mode An alarm is occurred with the high pressure at 3.80 Ma, with the pressure measured either as displayed by the monitoring software or with a manifold gauge, at which time the temperature of liquid in the outdoor unit s heat exchanger is detected to be at the temperature of the outside air. - Contact the service representative -4 An alarm is occurred with the high pressure at 3.80 Ma, with the pressure measured either as displayed by the monitoring software or with a manifold gauge, at which time the temperature of liquid in the indoor heat exchanger is detected to be at room temperature (intake temperature). - Contact the service representative - The system may be overcharged. Check how much refrigerant was added during installation. hen a system is inspected for airtightness, it is seldom that enough nitrogen has been expelled, so some remains in the circuit. In this case, it is necessary to collect the refrigerant and then recharge the system. -1

52 1. 0 AC ower Supply Trouble Error Detection Method Instantaneous blackout Zero-cross (waveform input of power supply) error DC voltage charge failure 2. Error Diagnosis te : The work involved in diagnosing each of the items is extremely dangerous, so turn the power off at the breaker before performing the tests. 1 Check the power supply & the wiring 2 Check the outdoor unit CR C board 3 Check the outdoor unit HIC C board : Single-phase model Is the voltage on each of the 1-2 : 3-phase model terminal boards within +10% of the rated voltage? Check for open circuit and the voltage at the breaker. if a problem is found, fix it and check again. ower wiring N-phase is connected. Correct wiring 1-3 ower wiring L2 and N are reverse connected. (3-phase only) Correct wiring 1-4 Turn the power back on and check again. Is the alarm triggered again? The connector CN-RY2 on the outdoor CR C board is connected properly (locked). (3-phase only) Are the wires (RE1, RE2) from the reactor firmly installed? Turn the power back on and check again. Is the alarm triggered again? 3-1 : Single-phase model 2-1 : 3-phase model Correct wiring (connector) 3-2 Correct wiring Replace the outdoor unit HIC C board Final check 4-1 There may be a instantaneous blackout failure. If there is nothing abnormal, see what happens. Single-phase outdoor unit HIC C board 3-phase outdoor unit HIC C board RE1* RE1 RE2* RE2 * Common in RE1 and RE2 4hp : lug-in type hp, 6hp : Fastening screw type (for 3-phase outdoor unit CR C board) CN-RY2-2

53 1. 13 Alarm alve Open Error Detection Method Detection is performed only in the test run. hen once detected or the test run finished without any error, the second detection will not be done. In case of forgetting to open a valve, 04 (high-pressure switch operational alarm) is occasionally preceded due to the following conditions. The status of small temperature change of the operating indoor unit continues for the first 7 minutes since the cooling test run has started. 2. Error Diagnosis 1 Service valve 2 Adjustment to refrigerant change Service valve inside the outdoor unit closed t additional refrigerant charged Open the service valve 2-1 Additional refrigerant charge Blockage in refrigerant circuit Are the tubes clogged? Is the outdoor unit s electronic control valve operating correctly? (Check for debris clogging the electronic control valve, a problem with the electronical coil and/or the control C board.) Avoid clogging Replace the electronic control valve 3-3 As the second detection is not done, restart and see what happens if there is no error. -3

54 14 O2 Sensor Detect 1. Error Detection Method It is judged an error whenever the outdoor unit receives the signal O2 Alarm Occurred from the indoor unit. ith the indoor unit s setting (item code 0B) set to 0001, the EXCT input was shorted. 2. Error Diagnosis 1 System configuration 2 Indoor unit s setting 3 Indoor EXCT wiring 4 Indoor unit s control C board Is an O2 sensor being used? Is the indoor setting, item code 0B, on the indoor unit s control C board set to 0001? Is the indoor EXCT socket (wire) shorted? Is the alarm triggered if the indoor EXCT socket (wire) is disconnected, and the power is reset? Since there is no error, see what happens After correcting the setting, Correct wiring Indoor unit control C board error replace C board. -4

55 1 Insufficient Gas Level Detected 1. Abnormal Detection Method Alarm occurs in the following cases: Compressor's current value shows lower than a certain value. Compressor's discharge temperature exceeds 9 C. Electronic expansion valve is fully opened. The difference between indoor unit heat exchanger temperature and intake temperature is less than 4K. 2. Error Diagnosis 1 Adjustment of refrigerant amount 1-1 Insufficient gas level (Check whether or not pressure level is normal.) 1-2 Check leakage of refrigeration (leak test) Recharge with additional refrigerant. 1-2 Replace leaking part with a new one. See what happens. -

56 16 Compressor Overcurrent Trouble 1. Meaning of Alarm Secondary current effective value detected the overcurrent (trip current value). Single-phase model (2.hp 3hp) : Trip current = 23.0 A 3-phase model (4hp 6hp) : Trip current = 17.0 A Single-phase model (4hp 6hp) : Trip current = 27.0 A Secondary current instantly detected overcurrent (trip current value). Single-phase model (2.hp 3hp) : Trip current = 28.0 Apeak 3-phase model (4hp 6hp) : Trip current = 27.0 Apeak Single-phase model (4hp 6hp) : Trip current = 4.0 Apeak 2. Check of content 0 Multiple factors 1 ower Source 2 Board wiring Replaced the compressor (added oil, if it was necessary) but it occurred again immediately. Replaced the board, but it occurred again immediately. ower cord connections are loose. Rated power voltage is not within ±10%. 1-3 Extreme fluctuations in voltage. 1-4 An open phase state is observed. 2-1 Disconnected parts, miswiring and/or poor connections (loose) are observed in the connections on the CR board and/or in the connections of components that are connected by wiring from the CR board Replace compressor along with adding oil, then recheck from Correct the wiring 1-2 Test the power supply 1-3 Test the power supply 1-4 Test the power supply 2-1 Correct Disconnected parts, miswiring and/or poor connections (loose) are observed in the connections of outdoor board(s) that are connected by wiring from the CR board. Correct Disconnected parts, miswiring and/or poor connections (loose) are observed in the connections of outdoor board(s) that are connected by wiring from the HIC board. Correct Disconnected parts, miswiring and/or poor connections (loose) are observed in the connections of HIC boards connected by wiring from the CR board. Correct 2-2- Disconnected parts, miswiring and/or poor connections (loose) are observed in the connections of HIC board(s) that are connected by wiring from the outdoor board. Correct Disconnected parts, miswiring and/or poor connections (loose) are observed in the connections of HIC board(s) that are connected by wiring to a compressor. Correct Compressor wiring Disconnections and/or miswiring are observed in the connecting location of the compressor terminals. Conditions such as burned terminal covers and/or discolored terminals are observed in the connecting location of the compressor terminals. Correct 3-2 Eliminate looseness by changing the terminals, or crimping the terminals again

57 4 Check the situation 4-1 Outdoor air intake temperature is high. Take measures May be caused by poor outdoor unit air flow (dirty or clogged heat exchanger, blocked discharge port, etc.) Air short circuit has occurred. This is a phenomenon when discharged air (exhaust heat) from the outdoor unit is drawn back into the suction vent. Indoor air intake temperature is high. Correct 4-3 revent air short circuit 4-4 Take measures 4- Check operation The filter of the indoor unit is clogged. Air short circuit has occurred. This is a phenomenon when discharged air (exhaust heat) from the indoor unit is drawn back into the suction vent. ossible to operate. Clean the filter 4-6 revent air short circuit Check history 7 Check the HIC boards 8 Check the compressor Operating pressure is affected by pressure overload. Tends to have an overcharge of refrigerant in the system. Tends to operate for a long time turning gas back into liquid. Tends to have insufficient refrigerant charge in the system. Even though the high pressure saturation temperature is 43 C or less, the secondary current of the inverter is high. (The frequency (Hz) ends up dropping due to the current.) Dividing the outdoor IN operation time by the number of times oil was supplied to the system yields 3 hours or less. There is a history of H31 in the pre-trip counter of the outdoor alarm history. The results of HIC board IM ass/fail Tests show the outside the range of the resistance of a conforming part listed in the next page. The compressor is causing a failure in the insulation. The winding resistance of the compressor is abnormal. Standard winding resistance hp: horse power Single-phase model (2.hp 3hp) - : ohm - : ohm - : ohm Single-phase model (4hp 6hp) - : ohm - : 0.49 ohm - : ohm 3-phase model - : ohm - : ohm - : 1.00 ohm -3-4 Adjust the amount of refrigerant -4 Check the operation of functional parts - Adjust the amount of refrigerant -6 Replace the compressor See what happens Replace the compressor and add oil. However if 6-1 was no, it is not necessary to add oil. 7-1 Replace HIC board 8-1 Replace the compressor 8-2 Replace the compressor

58 9 Check the HIC C boards 10 Check the outdoor unit main C board 9-1 Replace the HIC C board and operate the unit. (Apply putty and screws must not be loose) Does it operate normally? See what happens Replace the control C board and operate the unit. See what happens. (Check content of 7) The test check of the HIC board is only a check on the output level, so the input stage may not be working. ith the filter board broken, alarm 16 may not be triggered. HIC board IM ass/fail Tests Measure with an analog tester. (Set to the k ohm range.) Measure the board by itself. (Remove wires connected from other parts.) Measure using IM terminals. Conforming part resistance value (measure with an analog tester) Tester terminals N - N Resistance value (ohm) 1 k to k 1 k to k 1 k to k k to 10 k 100 k to 100 k to 100 k to 100 k to Tester terminals - + N Resistance value (ohm) 100 k to 100 k to 100 k to 1 k to k 1 k to k 1 k to k Excepting the parts of 100 k to value is 0 = short-circuit., it is acceptable if a small resistance value appears as a reference value unless the Tester terminals + HIC+ HIC- - HIC- HIC+ Resistance value (ohm) 1 k to 10 k 1 k to 10 k 1 k to 10 k k to 20 k 20 k to 20 k to 20 k to 20 k to Tester terminals - HIC+ HIC- + Resistance value (ohm) 20 k to 20 k to 20 k to 1 k to 10 k 1 k to 10 k 1 k to 10 k Excepting the parts of 20 k to value is 0 = short-circuit., it is acceptable if a small resistance value appears as a reference value unless the -8

59 Outdoor nit Control HIC CB Outdoor nit Control CB A74689 : (-60E1E, -71E1E) (for single-phase outdoor unit HIC CB) CR-0E1E : bottom (-0E1E) (for single-phase outdoor unit CB) N N Outdoor nit Control HIC CB A : (-100E1E) (for single-phase outdoor unit HIC CB) N A : (-12E1E, -140E1E) (for single-phase outdoor unit HIC CB) N -9 SM _AC-i.indb /09/07 10:42:32

60 Outdoor nit Control CB CR-71EY1E : bottom (-71EY1E) (for single-phase outdoor unit CB) CR-60EY1E : bottom (-60EY1E) (for single-phase outdoor unit CB) N N Outdoor nit Control HIC CB A : (-100EY1E) (for single-phase outdoor unit HIC CB) N A : (-12EY1E) (for single-phase outdoor unit HIC CB) N -60 SM _AC-i.indb /09/07 10:42:34

61 Outdoor nit Control HIC CB A : (-71E1E8) A : (-100E1E8, -12E1E8, -140E1E8, -140EY1E8) (for 3-phase outdoor unit HIC CB) N A : (-100EY1E8, -12EY1E8) (for 3-phase outdoor unit HIC CB) N -61 SM _AC-i.indb /09/07 10:42:41

62 22 Outdoor nit Fan Motor Trouble 1. Error Detection Method It is judged an error when the outdoor fan motor s rotating signal cannot be detected normally. 2. Error Diagnosis 1 iring 1-1 Are the connectors CN-FMA, CN-FMB, CN-FM1, and CN-FM2 firmly connected to the outdoor control C board (lock engaged)? 2 Outdoor Disconnect the connectors CN-FMA, CN-FMB, CN-FM1, fan motor and CN-FM2 from the outdoor control C board and rotate 2-1 the outdoor fan by hand; does it rotate freely? (Check the outdoor fan motor lock) 2-1 Correct the connector connections 3-1 Replace the outdoor fan motor 3 Outdoor Turn the power on and run the unit again; is 22 triggered 3-2 control 3-1 again? Or can you see or hear anything that is obviously C board wrong in its rotation? 3-3 Replace the outdoor control C board. (If it fails to operate normally even after replacing 3-2 the outdoor control C board, replace the outdoor fan motor.) 3-3 If there is nothing particularly out of the ordinary, see what happens. -62

63 29 Lack of IN compressor wiring, IN compressor actuation failure (including locked), DCCT failure 1. Error Detection Method Abnormal current is detected at DCCT before start-up. Start-up failed during overcurrent and/or step-out detected. Open-wire of compressor and/or backspin detected. Secondary current is not detected during IN compressor is running. 2. Error Diagnosis 1 iring Disconnected parts, miswiring and/or poor connections (loose) Correct wiring 1-1 are observed in the connections of HIC C board(s) that are connections connected by wiring to a compressor. *1 1-2 Disconnected parts, miswiring and/or poor connections (loose) Correct wiring 1-2 are observed in the connections of outdoor board(s) that are connections connected by wiring from the HIC C board. * Disconnections and/or miswiring is observed in the connections Correct 2-1 Compressor of the compressor terminals. *1 2-2 wiring Eliminate looseness Conditions such as burned terminal covers and/or discolored by changing the 2-2 terminals are observed at the connectors of the compressor terminals, or crimping terminals. *1 the terminals again Check the The results of the pass/fail tests for the following HIC C board Replace the HIC board HIC C 3-1 IM show it to be outside the range of the resistance of a boards conforming part Replace the HIC C board and operate the unit. (Apply putty See what happens. and screws must not be loose) Does it operate normally? Check the outdoor control C board 4-1 Replace the control C board and operate the unit. See what happens. *1 Checking for looseness of compressor terminals by wiggling them has the adverse effect of loosening them, so do not do it. Evaluate them by discoloration of wire insulation near the terminal. HIC board IM ass/fail Tests Measure with an analog tester. (Set to the k ohm range) Measure the board by itself. (Remove wires connected from other parts.) Measure using IM terminals. Conforming part resistance value (measure with an analog tester) Tester terminals + N - N Resistance value (ohm) 1 k to k 1 k to k 1 k to k k to 10 k 100 k to 100 k to 100 k to 100 k to Tester terminals - N + Resistance value (ohm) 100 k to 100 k to 100 k to 1 k to k 1 k to k 1 k to k Excepting the parts of 100 k to value is 0 = short-circuit., it is acceptable if a small resistance value appears as a reference value unless the Tester terminals + HIC+ HIC- - HIC- HIC+ Resistance value (ohm) 1 k to 10 k 1 k to 10 k 1 k to 10 k k to 20 k 20 k to 20 k to 20 k to 20 k to Tester terminals - HIC+ HIC- + Resistance value (ohm) 20 k to 20 k to 20 k to 1 k to 10 k 1 k to 10 k 1 k to 10 k Excepting the parts of 20 k to value is 0 = short-circuit., it is acceptable if a small resistance value appears as a reference value unless the -63

64 31 Group Control Error 1. Error Detection Method Other indoor unit alarms within the group. 1 Other indoor unit 1-1 Survey the indoor unit that alarms other than 31 in the indoor unit group and specify the causes of failure. -64

65 Outdoor nit Control HIC CB Outdoor nit Control CB A74689 : (-60E1E, -71E1E) (for single-phase outdoor unit HIC CB) CR-0E1E : bottom (-0E1E) (for single-phase outdoor unit CB) N N Outdoor nit Control HIC CB A : (-100E1E) (for single-phase outdoor unit HIC CB) N A : (-12E1E, -140E1E) (for single-phase outdoor unit HIC CB) N -6 SM _AC-i.indb /09/07 10:42:42

66 Outdoor nit Control CB CR-71EY1E : bottom (-71EY1E) (for single-phase outdoor unit CB) CR-60EY1E : bottom (-60EY1E) (for single-phase outdoor unit CB) N N Outdoor nit Control HIC CB A : (-100EY1E) (for single-phase outdoor unit HIC CB) N A : (-12EY1E) (for single-phase outdoor unit HIC CB) N -66 SM _AC-i.indb /09/07 10:42:4

67 Outdoor nit Control HIC CB A : (-71E1E8) A : (-100E1E8, -12E1E8, -140E1E8, -140EY1E8) (for 3-phase outdoor unit HIC CB) N A : (-100EY1E8, -12EY1E8) (for 3-phase outdoor unit HIC CB) N -67 SM _AC-i.indb /09/07 10:42:49

68 -4. Inspection of arts (Outdoor nit) (1) Electronic control valve (MO1) MO1: Measure the voltage between plug pin and pins 1 through 4 at the CN-MO1 connector (, white) on the outdoor unit control CB. (Because of the pulse output, a simplified measurement method is used. Set the tester to the 12 range; if the value displayed is approximately 4, then the voltage is normal.) If the voltage is normal, measure the resistance between connector pin and pins 1 through 4. Resistance between pin and pins 1 through 4 should be approximately 46 for all. (If the result is 0 or, then replace the coil.) -68

69 -. Symptom: Thermostat in OFF continues or cycles OFF & ON too frequently 1. How to detect abnormality Abnormality does not occur. rotective function can be checked when the outdoor maintenance remote controller is connected. 2. Error Diagnosis 1 Indoor control C board 2 Outdoor control C board 3 Control equipment 4 System Setting temperature reaches the level set ON thermostat. Setting temperature is too low in heating mode and too high in cooling and dry mode. Check if the sensors are connected correctly. Are all connection made properly? Room temp. (TA) in yellow, heat exchanger (E1) in red, heat exchanger (E2) in black, heat exchanger (E3) in brown, air outlet (BL) in green DIS (display mode) is applied. ith a thermostat OFF in heating mode, wind speed (item code 0) is out of range 0-6. (se Simple Setting Function on standard timer remote controller.) 1- DEMAND is applied Outdoor unit and protective function of a system are operating. (Connect outdoor maintenance remote controller to RC socket on outdoor unit main control C board and check alarm messages.) Discharge temperature is over 80 C in stop mode and does not decrease. (Connect outdoor maintenance remote controller to RC socket on outdoor unit main control C board and check alarm messages.) Demand value always stays low. (The value is lower than 70. Excluding -1 (unlimited))(connect outdoor maintenance remote controller to RC socket on outdoor unit main control C board and check alarm messages.) 2-4 DEMAND is applied Demand setting is made by control units (-AIMS, Seri-ara I/O unit for outdoor unit, Seri-ara I/O each indoor unit.) hen operating in cooling (including auto cooling & heating) and dry mode, lowest temp. of indoor E1, E2 and E3 sensor is less than 2 C (under anti-freeze control). 4-2 During defrosting operation 4-3 Outdoor unit C board failure Replacement Adjust setting temperature 1-2 Connect correctly 1-3 Turn OFF(OEN) 1-4 Choose one of 0 to 6 1- Turn OFF(OEN) 2-1 See operational status 2-2 Replace discharge temperature sensor 2-3 Increase values (over Turn OFF(OEN) 3-1 Turn OFF 4-1 ait until more than 2 C reaches 4-2 ait for a few minutes to 10 minutes or so 4-3 According to a type of model, the indoor sensors will not be supplied in some cases. According to a type of model, the outdoor DEMAND will not be supplied in some cases. hen LINE Checker is used, the temperature sensors can be observed (display, record) simultaneously. According to some areas, some of the models are unreleased. -69

70 -6. How to Clean Heat Exchanger 1. Turn off the power supply. ARNING ELECTRICAL SHOCK CAN CASE SEERE ERSONAL INJRY OR DEATH. lid Remove the lid (drain pump). (Fig. 1) Remove the drain plug and drain the water from the drain pan. (Fig. 1) Insert a high pressure cleaner from the opening (Fig. 2a) and clean the heat exchanger. (Fig. 2b) Drain plug Fig. 1 Opening Heat exchanger Fig. 2a Fig. 2b. hen finished cleaning, install the drain plug and lid (drain pump). -70

71 -7. How to Replace Fan Motor Removing Fan Motor 1. Turn off the power supply. Screws x locations ARNING ELECTRICAL SHOCK CAN CASE SEERE ERSONAL INJRY OR DEATH. Lid of electrical component box Fig Remove the lid of the electrical component box. (Screws x locations: Fig. 1) Make sure the C board should not be electrified. ower supply LED should be lit off on C board. (Fig. 2) ower LED Fig. 2 Connector 3. Disconnect the interconnector in the middle of the wiring to the fan motor. (Fig. 3) Fig Remove the bottom plate. (Fig. 4) Screw Bottom plate Fig. 4. Disconnect two (2) clutches (Fig. a) fixing the lower side of the fan casing and pull out the protrusion part (Fig. c) placed onto the side of the main unit (Fig. b). Then remove the fan casing. Clutches Fig. a Fan casing Fig. c rotrusion part Fig. b Main unit side -71

72 6. Remove the screws (M6 x2 locations: Fig. 6) fixing the fan motor. It is recommended that a nutdriver (8mm) be used. Bracket Screws (M6) Fig Remove the bracket (Fig. 6) and then remove the fan and fan motor (Fig. 7). Fan motor 8. Loosen the fixed screw with a hexagon wrench (3mm, over 100mm in length) and remove the fan. Fig. 7 Fixed screw Fan Hexagon wrench Fig Remove the rubber attached to the wiring of the fan motor (Fig. 9). Rubber Fig. 9 Installing Fan Motor 1. For installation, reverse the procedure above. 2. Fine tune so that the fan can be positioned in the center of the fan casing. -72