Related Manuals for Hitachi YUTAMPO Series
Summary of Contents for Hitachi YUTAMPO Series
- Page 1 YUTAMPO SERIES Service Manual Indoor unit YUTAMPO TAW-(190/270)RHC Outdoor unit RAW-35RHC...
- Page 3 Contents C o n t e n t s General information Preparation Control functions Electrical checks of main parts Servicing Troubleshooting Maintenance notes SMGB0135 rev.0 - 03/2020...
-
Page 5: Table Of Contents
General Index General Index General information ....................1 General information ..........................2 1.1.1 General notes ..............................2 1.1.2 Introduction ..............................2 Applied symbols ............................3 Norms and Regulations ........................... 3 Product guide ............................4 1.4.1 Classification of the units ..........................4 1.4.1.1 Outdoor unit ............................4 1.4.1.2 Indoor unit ............................ - Page 6 General Index Anti Legionella function ......................... 21 Boost function............................22 3.7 Emergency function..........................23 3.8 Night Shift Function ..........................24 Circuit Pump - DHW Recirculation function................... 25 3.10 Timers function ............................26 3.10.1 Setting of Simple timer ..........................26 3.10.2 Setting of Schedule timer ..........................26 3.11 Central Operation functions........................
- Page 7 General Index 4.2.1 Safety thermostat (water temperature safety device) ..................48 4.2.2 Electrical heater ............................49 4.2.3 DHW Thermistor ............................49 Servicing ........................51 Outdoor unit............................52 5.1.1 Procedure for disassembly and reassembly the outdoor unit ............... 52 Indoor unit ............................. 53 5.2.1 Removing the service cover .......................... 53 5.2.2 Replacement of the LCD Controller ......................53 5.2.3 Replacement the PCB ........................... 54 5.2.4 ...
-
Page 9: General Information
1 General information G e n e r a l i n f o r m a t i o n Index General information ..........................2 1.1.1 General notes ..............................2 1.1.2 Introduction ..............................2 Applied symbols ............................3 Norms and Regulations ........................... 3 Product guide ............................ -
Page 10: General Information
No type of modification must be made to the equipment without prior, written authorization from the manufacturer. N O T E This air to water heat pump has been designed for standard water heating for human beings. For use in other applications, please contact your Hitachi dealer or service contractor. 1.1.2 Introduction Hitachi proudly announces the newest R32 complete range of Heat Pump Water Heater in its award-winning YUTAMPO range. The YUTAMPO units produce domestic hot water like any electrical heater, oil or gas boiler, but they do so by ... -
Page 11: Applied Symbols
• Instructions regarding inspections to be made on unit parts or systems may also be included. 1.3 Norms and Regulations Following Regulation EU No. 517/2014 on Certain Fluorinated Greenhouse gases, it is mandatory to fill in the label attached to the unit with the total amount of refrigerant charged on the installation. Do not vent R32 into the atmosphere: R32 is fluorinated greenhouse gases covered by the Kyoto protocol global warming potential (GWP) R32 = 675. Tn of CO2 equivalent of fluorinated greenhouse gases contained is calculated by indicated GWP * Total Charge (in kg indicated in the product label and divided by 1000. Appropriate refrigerant The refrigerant used in each unit is identified on the specification label and manuals of the unit. Hitachi shall not be held liable for any failure, trouble, malfunction or accident caused by units illegally charged with refrigerants other than the specified one. Consequences of charging non-specified refrigerant It may cause mechanical failure, malfunction and other accidents. It may cause operational failure of protection and safety devices of air conditioners. It may also cause lubrication failure of the sliding part of the compressor due to deterioration of refrigerant oil. In particular, hydrocarbon refrigerants (such as propane, R441A, R443A, GF-08, etc.) are not allowed, since these are combustible and may cause major accidents such as fire and explosion in case of improper handling. Once a non-specified refrigerant has been charged, no further servicing (including draining of refrigerant) shall be ... -
Page 12: Product Guide
1 General information Product guide 1.4 Product guide 1.4.1 Classification of the units 1.4.1.1 Outdoor unit Unit type: Outdoor unit (Split air system) Position-separating hyphen (fixed) Compressor power R32 refrigerant Heat pump Series 1.4.1.2 Indoor unit Unit type: YUTAMPO Position-separating hyphen (fixed) Tank capacity: 190 / 270 R32 refrigerant Heat pump Series SMGB0135 rev.0 - 06/2020... -
Page 13: Product Guide
1 General information Product guide 1.4.2 Product guide 1.4.2.1 Outdoor unit 1~ 230V 50Hz Unit Code RAW-35RHC 60374825 1.4.2.2 Indoor unit ( ) 1~ 230V 50Hz Unit Code TAW-190RHC 70491001 TAW-270RHC 70491014 SMGB0135 rev.0 - 06/2020... -
Page 14: Accessory Code List
1 General information Product guide 1.4.3 Accessory code list Control accessories Accessory Name Code Figure H-LINK Adapter for Central Devices application 7E549943 ATW-HCD-01 (to work with ATW-(MBS/KNX/TAG)-02) ATW-MBS-02 MODBUS gateway for YUTAKI / YUTAMPO units 7E549924 ATW-KNX-02 KNX interface for YUTAKI / YUTAMPO units 7E549925 ATW-TAG-02 Home automation gateway 70549926 AHP-SMB-01 SmartBox (Hi-Box) 70549919 Optional Function Connector 7E549956 (Inputs and Outputs optional signals) ATW-OFC-02 Active Anode (Cathodic Protection) 7E549954 ATW-CP-05 SMGB0135 rev.0 - 06/2020... -
Page 15: Preparation
2 Preparation P r e p a r a t i o n Index Name of each part ........................... 8 2.1.1 Tank unit TAW-(190-270)RHC ......................... 8 2.1.2 Outdoor unit RAW-35RHC ..........................8 Name and function of control panel......................9 Preparing for operation.......................... 11 2.3.1 Filling up the tank ............................11 2.3.2 Turning on the power ............................11 Setting the language .......................... -
Page 16: Name Of Each Part
2 Preparation Name of each part 2.1 Name of each part 2.1.1 Tank unit TAW-(190-270)RHC Mg Anode (Factory Assembled) Active Anode (Optional) Hot water outlet (G 3/4” red) N O T E • • Mg-Anode should be changed yearly, it may loose its function for corrosive protection if exceeds the time frame. -
Page 17: Name And Function Of Control Panel
2 Preparation Name and function of control panel 2.2 Name and function of control panel LCD screen OK button It is used to select the parameters to adjust and to confirm the selected values. Arrow key ... - Page 18 2 Preparation Name and function of control panel Time and date State of DHW heating operation (OFF, Thermo ON/OFF) DHW control This part of the screen is used for the indication of the setting temperature for DHW and a throughput icon indicating the progress of DHW heating operation.
-
Page 19: Preparing For Operation
2 Preparation Preparing for operation 2.3 Preparing for operation 2.3.1 Filling up the tank Follow the steps below when starting up the unit for the first time or when it has not been used for an extended period of time 1 Open the outlet water taps of the DHW, to expel all the air from inside the tank. -
Page 20: Setting The Language
2 Preparation Setting the language 2.4 Setting the language After turning on the power, the LCD panel will show the controller settings screen. The YUTAMPO controller has 13 available languages. Available languages English Español Français Italiano Deutsch Slovensko Português Dansk Nederlands Swedish Suomi... -
Page 21: Setting Hot Water Temperature
2 Preparation Setting hot water temperature 2.6 Setting hot water temperature Hot water temperature can be set between 30 to 55°C (75 ºC when electric heater is enabled). Set the temperature depending on hot water volume that you require. The recommended temperature range is 45 to 55°C. (The factory default setting is 45ºC) The operation mode will automatically change depending on the hot water setting temperature. -
Page 23: Control Functions
3 Control functions C o n t r o l f u n c t i o n s Index System diagram ............................ 16 Basic operation............................17 3.2.1 Operating procedures ............................ 17 3.2.2 Stopping ................................ 17 Standard Operation without Electrical Heater ..................18 DHW Heater function .......................... -
Page 24: System Diagram
3 Control functions System diagram 3.1 System diagram Multiple signals Single signals Power Thermistor for DHW PC-ARFTE A+D conversion circuit LCD controller Transmission circuit Compressor drive Power circuit circuit YUTAMPO Control power circuit Outdoor DC fan motor drive circuit Relay drive circuit Inputs drive circuit Indoor/Outdoor Reset circuit... -
Page 25: Basic Operation
3 Control functions Basic operation 3.2 Basic operation The time required to reach the set water temperature depends on factors such as the temperature of water supply, the temperature inside the tank or the outdoor air temperature. If the electric heater is enabled, it is automatically set to auxiliary operation in case that heating up the water would take more than eight hours due to low water and outdoor air temperatures. -
Page 26: Standard Operation Without Electrical Heater
3 Control functions Standard Operation without Electrical Heater 3.3 Standard Operation without Electrical Heater DHW heating operation starts when the temperature of the water in the tank is low enough to start up the heat pump. DHW is always heated up with the heat pump. • High Efficiency: Compressor operation is adjusted to optimal efficiency for lower power consumption. -
Page 27: Dhw Heater Function
3 Control functions DHW Heater function 3.4 DHW Heater function The DHW tank is fitted with a backup electrical heater. This electrical heater is disabled by factory settings and setting cannot increase more than 55 ºC. In case of setting higher than 55ºC or anti-legionella function, electrical heater must be enabled. It is possible to define a waiting time for the activation of the electrical heater of the DHW tank. After this time, heater will be switched ON in order to support Heat Pump to heat the tank. Status of electrical heater operation (enabled/ disabled) Waiting time for the beginning of electrical heater... -
Page 28: Standard Mode
3 Control functions DHW Heater function 3.4.2 Standard mode DHW heating operation starts when the temperature of the water in the tank is low enough to start up the heat pump. DHW is heated up with the heat pump or the electrical heater (if the water setting temperature is up to 55ºC). -
Page 29: Anti Legionella Function
3 Control functions Anti Legionella function 3.5 Anti Legionella function When anti legionella mode is set, the unit will raise the selected temperature of the tank (between 50 to 75°C) once a week to sterilize the water. Anti legionella mode uses the electrical heater. icon appears on the main screen. -
Page 30: Boost Function
3 Control functions Boost function 3.6 Boost function It is possible to manually force a one-time heating of the DHW tank up to the temperature set as DHW Boost temperature. This feature is useful to cover exceptional demand of DHW. icon appears on the main screen. -
Page 31: Emergency Function
3 Control functions Emergency function 3.7 Emergency function It is possible to switch to emergency operation by means of the electrical heater, in case of malfunction of the outdoor unit. If emergency mode is set up as manual, the user shall switch ON the electrical heater on the emergency operation option. -
Page 32: Night Shift Function
3 Control functions Night Shift Function 3.8 Night Shift Function It is possible to reduce the compressor load with the intention of decrease the noise during the night time. When Night Shift function is active, the capacity of the YUTAMPO unit is reduced to the percentage defined in the menu and Night Shift icon is displayed in the general notifications zone of the LCD controller. Night shift is disabled by default. Timer enabled activates the function. Once timer is enabled the function is activated and it is possible to adjust the period of time that the function is operating at the lower capacity set. -
Page 33: Circuit Pump - Dhw Recirculation Function
3 Control functions Circuit Pump - DHW Recirculation function 3.9 Circuit Pump - DHW Recirculation function YUTAMPO has an output for a DHW water pump re-circulation option. By using this output, user can heat all the water inside DHW piping system. This output can also be used with Anti-Legionella and timer function. Status of activation of the water pump for the re- circulation of the hot water from the DHW tank by means of the heat pump. -
Page 34: Timers Function
3 Control functions Timers function 3.10 Timers function The LCD controller must be set to the correct date and time before using the timer function. The timer function allows the selection of simple and scheduled timers, as shown in the figures below: 3.10.1 Setting of Simple timer The following parameters can be adjusted: • Frequency (Never / Once / Everyday / Weekend / Work day) • Starting Time: From 00:00 to 24:00... -
Page 35: Central Operation Functions
3 Control functions Central Operation functions 3.11 Central Operation functions In case that the YUTAMPO unit is connected to a central operation device (KNX,Modbus, etc.) it is necessary to configure the control type (local or full) and the H-LINK Address for the refrigerant cycle and the indoor unit. In case that the YUTAMPO unit is connected a central operation device (KNX,Modbus, etc.) •... -
Page 36: Smart Function
3 Control functions Smart function 3.12 Smart function This function can be used to block or limit the heat pump or increase demand due to electricity availability. • HP Block: Heat Pump is forbidden in any condition. • SG Ready: Smart Grid Ready operation. Type of trigger for HP Block: • Closed: Action when input is closed. -
Page 37: Sg Ready Function
3 Control functions Smart function After selecting the Smart Function (HP Block or SG Ready) it is necessary to select the appropriate input on the I/O menu: Input for SG Ready or HP Block Input for SG Ready 3.12.1 SG Ready Function The SG Ready is awarded to the heat pump series, to control technology by integrating the individual heat pump. -
Page 38: Energy Configuration Function
3 Control functions Energy configuration function 3.13 Energy configuration function This optional function allows measuring the real power consumption. It can be done by outdoor unit estimation, or connecting an external power meter. The number of pulses of the power meter is a variable that must be set through the unit controller. Status of the power meter data control Number of pulses per kWh of the power meter. -
Page 39: Pump Down Procedure Function
3 Control functions Pump down procedure function 3.14 Pump down procedure function In case of replacing refrigerant parts, it is possible to collect the refrigerant to the outdoor unit by pump down procedure. Configured time for the pump down procedure C A U T I O N After collecting the refrigerant through the pump down procedure function it’s necessary to take the voltage out of the system so that the 4-way valve does not remain in cooling mode. -
Page 40: Quick Action Function
3 Control functions Quick action function 3.15 Quick action function The following quick actions are shown when pressing the OK button at the setting temperature: Timer: Menu for the selection and configuration of simple timer and schedule timer Status: Display of information related to current operation conditions DHW Boost: Activation of the auxiliary DHW heater and Heat Pump (if operation is possible, to speed up DHW heating operation 3.16 Inputs and outputs 3.16.1 Inputs... -
Page 41: Operation Information
3 Control functions Operation information 3.17 Operation information In operation information menu it is possible to find the most important setting parameters of the system besides the information of the operation conditions. Detailed information about DHW: • Operation • Current temperature • Setting Temperature • Electrical Heater Status • Electrical Heater Operation • Legionella Status • Legionella Operation Detailed information about Heat Pump: • Outdoor Ambient Temperature • Discharge Gas Temperature... -
Page 42: About
3 Control functions About 3.19 About In this section of the LCD controller it is possible to find the following information: Unit type, unit capacity, controller firmware, indoor PCB firmware and language package. It is possible and recommendable to fill this information providing a contact phone to the user. SMGB0135 rev.0 - 06/2020... -
Page 43: Electrical Checks Of Main Parts
4 Electrical checks of main parts E l e c t r i c a l c h e c k s o f m a i n p a r t s Index Outdoor unit............................36 4.1.1 Power circuit ..............................36 4.1.2 Power circuit (low voltage) .......................... -
Page 44: Outdoor Unit
4 Electrical checks of main parts Outdoor unit 4.1 Outdoor unit 4.1.1 Power circuit SMGB0135 rev.0 - 06/2020... - Page 45 4 Electrical checks of main parts Outdoor unit This circuit full-waves rectifies 230 VAC applied between terminals L and N and boosts it to a required voltage with the IPM to create a DC voltage. The voltage become 300-330 V when the compressor is operated. ...
-
Page 46: Power Circuit (Low Voltage)
4 Electrical checks of main parts Outdoor unit 4.1.2 Power circuit (low voltage) The 230V AC voltage is rectified to DC voltage (B-12V,16V,12V,5V) pass through switching control IC (ICI), switching transformer. • (1) B-12V Power supply for electrical expansion valve. •... -
Page 47: Pcb For Power Circuit
4 Electrical checks of main parts Outdoor unit 4.1.3 PCB for power circuit Voltage specification of power circuit as shown in below table. Output Spec Main load Measuring point Example of possible failure mode Tester + : L105 (JUMPER) Micon, 5 V 0/P Outdoor not operate, no blinking indication ±... -
Page 48: Temperature Detection Circuit
4 Electrical checks of main parts Outdoor unit 4.1.5 Temperature detection circuit OH thermistor HIC PCB DEF thermistor Micro computer Outside air temperature thermistor Outside air temperature • OH thermistor circuit detect the temperature at the surface of compressor head, DEF thermistor circuit detect the defrosting operation temperature (evaporation temperature). -
Page 49: Electric Expansion Valve Circuit
4 Electrical checks of main parts Outdoor unit 4.1.6 Electric expansion valve circuit Electric Microcomputer expansion valve The electric expansion valve is driven by DC12V. Power is supplied to 1 or 2 phases of 4-phase winding to switch magnetic pole of winding in order to control the opening degree. Relationship between power switching direction of phase and open/close direction is shown below. -
Page 50: Dc Fan Motor Control Circuit
4 Electrical checks of main parts Outdoor unit 4.1.7 DC fan motor control circuit This model is built with DC fan motor control circuit inside outdoor electrical unit. Outdoor electrical Smoothing capa 2A Fuse DC300 -330V Drive circuit Microcomputer DC current Id This DC fan motor is control by outdoor microcomputer that follow the operating instruction received from indoor microcomputer. -
Page 51: Fan Motor
4 Electrical checks of main parts Outdoor unit Checking Fan Motor procedure Shut down supply and wait for 10 minutes for voltage to go down. Confirm it by measuring the DC voltage (must be below 10 V). Then disconnect fan motor connector (CN24). Confirm the abnormality or lock by rotating the propeller fan manually. -
Page 52: Compressor Motor
4 Electrical checks of main parts Outdoor unit 4.1.10 Compressor motor ASD102SKQA6JK6 Compressor type Power source 220 - 350 V 840 W Output White (U) Connection Red (W) Yellow (V) Resistance value 2 M= 2.167 White (U) Yellow (V) Red (W) Compressor C A U T I O N When the refrigerating cycle has been operated for a long time with the capillary tubes clogged or crushed or with too little refrigerant,... -
Page 53: Thermistor For Outside Air Temperature (Ta)
4 Electrical checks of main parts Outdoor unit 4.1.11 Thermistor for outside air temperature (Ta) 28,36 16,31 9,78 6,09 3,92 2,60 1,78 1,24 0,89 0,65 0,48 0,36 0,28 0,21 Temperature (ºC) SMGB0135 rev.0 - 06/2020... -
Page 54: Thermistor For Overheat Temperature (Td)
4 Electrical checks of main parts Outdoor unit 4.1.12 Thermistor for overheat temperature (Td) 665,50 468,68 241,93 131,08 74,17 43,63 26,58 16,71 10,82 7,18 4,89 3,40 2,41 1,74 0,96 0,83 1,28 100 105 110 115 120 125 Temperature (ºC) SMGB0135 rev.0 - 06/2020... -
Page 55: Thermistor For Defrost (Hex) Temperature (Te)
4 Electrical checks of main parts Outdoor unit 4.1.13 Thermistor for defrost (HEX) temperature (Te) 27,45 15,79 9,47 5,90 3,80 2,52 1,72 1,20 0,86 0,63 0,47 0,35 0,27 0,21 0,17 0,13 0,12 100 105 110 115 120 125 Temperature (ºC) SMGB0135 rev.0 - 06/2020... -
Page 56: Indoor Unit
4 Electrical checks of main parts Indoor unit 4.2 Indoor unit 4.2.1 Safety thermostat (water temperature safety device) Reset button 12,50 6.30x0.8 EN60730 Threaded cap 55±1 NUT-S-1607/00 46,5±1 ELECTRIC DIAGRAM NC Ø6±0.5 Disconnection 90+/-5ºC temperature 20 A Rated current RESET button The appliance can not connect again until the bulb doesn’t fall 50ºC at least SMGB0135 rev.0 - 06/2020... -
Page 57: Electrical Heater
4 Electrical checks of main parts Indoor unit 4.2.2 Electrical heater Resistance value (Ω) 30~36 Ω Capacity 1.64 kW Power supply 1 ~ 230 V 50 Hz 4.2.3 DHW Thermistor 72,05 37,92 20,96 12,10 7,26 4,51 2,89 1,91 1,29 0,89 0,63 0,46 0,34... -
Page 59: Servicing
5 Servicing S e r v i c i n g Index Outdoor unit............................52 5.1.1 Procedure for disassembly and reassembly the outdoor unit ............... 52 Indoor unit ............................. 53 5.2.1 Removing the service cover .......................... 53 5.2.2 Replacement of the LCD Controller ......................53 5.2.3 Replacement the PCB ........................... -
Page 60: Outdoor Unit
5 Servicing Outdoor unit D A N G E R • Disconnect the units from the power supply before touching any of the parts. Do not touch the electrical box before discon- necting it in order to avoid an electrical shock. • Wait minimum 10 minutes or more from all power supplies have been turned OFF. • When handling the electrical box, take care of components. Do not apply excessive force to them, in order to avoid damaging the electrical components. • In case of replacing Hydraulic parts, drain water from the unit its needed. Close Shutdown valves and open the drain valves (both field-supplied). C A U T I O N • In case of replacing refrigerant parts, collect refrigerant to the outdoor unit by pump down procedure. • Do not expose the refrigerant cycle to the atmosphere for a long period in order to avoid mixing the water and foreign parti- cles into the refrigerant cycle. After removing refrigerant parts, replace it quickly. If exposed for a long period, seal the liquid pipe and gas pipe. • All refrigerant parts are connected by brazing. Check to ensure whether there are flammable things around or not when using a burner for pipe connections, if not, oil existing pipe inside may ignite. •... -
Page 61: Indoor Unit
5 Servicing Indoor unit 5.2 Indoor unit 5.2.1 Removing the service cover 1 Unscrew the 2 screws which are fixed to the lower front C A U T I O N cover and remove it. 2 Unscrew the 2 screws on the bottom of the upper front •... -
Page 62: Replacement The Pcb
5 Servicing Indoor unit 5.2.3 Replacement the PCB 1 Pull backwards to remove the ebox cover. 3 Clamp the middle part of the spacers (x3) -1- with long- nose pliers and remove the PCB toward front side. 2 Unplug the following cables: Description CN15 Relay-AR CN4 Thermistor... -
Page 63: Replacement Of The Thermistor
5 Servicing Indoor unit 5.2.5 Replacement of the thermistor 1 Remove the screws (x4) of the heater cover and the 4 Install new one thermistor. heater cover. a. Insert the thermistor -2- through the hole of the 2 Disconnect the thermistor from the PCB (CN4 heater cover. -
Page 64: Replacing The Mg Anode Rod
5 Servicing Indoor unit 6 Install new one thermostat. c. Assembly the thermostat and fix it with the external nut. a. Insert the thermostat bulb and capillary through the hole of the heater cover. d. Connect all the terminals to the thermostat in the same position as it was originally and close the a. -
Page 65: Troubleshooting
6 Troubleshooting T r o u b l e s h o o t i n g Index Outdoor unit............................58 6.1.1 Discharge procedure and power shut off method for power circuit ............... 58 6.1.2 Troubleshooting support ..........................60 6.1.3 Self-diagnosis lighting mode ......................... 61 6.1.4 Checking the electrical parts of the outdoor unit ................... 64 6.1.5 Checking the refrigerant cycle ........................67 6.1.6 How to run the indoor unit with the outdoor unit test switch ................ -
Page 66: Outdoor Unit
6 Troubleshooting Outdoor unit 6.1 Outdoor unit 6.1.1 Discharge procedure and power shut off method for power circuit D A N G E R Voltage of about 350 V is charged between the terminal of smoothing capacitors. During continuity check for each circuit part of the outdoor unit, be sure to discharge the smoothing capacitors. ... - Page 67 6 Troubleshooting Outdoor unit Disconnection of tab terminal receptor All receptors used to connect with tab terminal are built with lock mechanism. Please take note that by using a force to pull out the receptor without releasing the lock, can cause a damage. Furthermore, during connecting the receptor back make sure to securely insert until end. Receptor type and procedure to releasing the lock Insulation sleeve Release button Horizontal (with a insulation sleeve) Vertical (with plastic casing) Pull out from top of insulation sleeve while pushing the release Pull out by holding the plastic casing.
-
Page 68: Troubleshooting Support
6 Troubleshooting Outdoor unit 6.1.2 Troubleshooting support Nº Function Description • The failure mode detected on the outdoor unit side is displayed by blinking the “LD301”. Detecting a failure will stop the outdoor unit and Display on the outdoor unit side keep blinking the LD301 until it is restarted. (The communication error will persist until the communication is reestablished.) • The failure modes detected on the indoor and outdoor unit sides are stored in the nonvolatile memory of the indoor unit and can be read later on. (The memory will remain even after power-off.) • Moreover, the normal self-diagnosis display function which rarely occurs will store and display failure modes that do not end up displaying the indoor unit lamp. (Any such mode may be unable to be stored if indoor or outdoor communications is in a failure.) Self-diagnosis memory • The product stores 5 last-stored failure modes. • There is a function for deleting memory. Once you clear the memory and run the product for several days, you can read the failure modes and check them, thereby detecting the less frequent failure phenomena. • Failure modes can be checked by both the blinking of the lamp of the outdoor unit and the display of the remote control liquid crystal display. N O T E • The “self-diagnosis function of the communication circuit”... -
Page 69: Self-Diagnosis Lighting Mode
6 Troubleshooting Outdoor unit 6.1.3 Self-diagnosis lighting mode D A N G E R • DC350V • CUT THE POWER SOURCE AND WAIT MORE THAN 10 MINUTES BEFORE SERVICE WORK. Confirm the DC Voltage at the measuring point shown in below figure must be less than 10V. Outdoor fan connector (CN24) LD301 P (DC V+) Test / Service switch N (DC V-) Self check (JW001) Self check (JW002) Compressor connector... - Page 70 6 Troubleshooting Outdoor unit Outdoor fan motor check diagnosis method 1 Put the power off. 2 Remove the outdoor fan motor’s connector from CN24. 3 Rotate the fan motor by hand and check whether the fan motor is locked or not. 4 Measure the resistance between each terminal of the fan motor connector. Normal resistance between each terminal: 60 ~ 100 Ω 5 Insert the fan motor’s connector. SMGB0135 rev.0 - 06/2020...
- Page 71 6 Troubleshooting Outdoor unit During stop: Self-diagnosis blinking mode LD301 (red) Self-diagnosis contents Main check point How to repair Blinking times Normal stop (Stopped by the indoor 1. No need to check 1. No malfunction thermostat or due to main operation OFF) ONCE Reset stop 1. Microprocessor was rebooted 1. Replace the outdoor unit controller. 1. Failure of the outdoor unit controller 1.
-
Page 72: Checking The Electrical Parts Of The Outdoor Unit
6 Troubleshooting Outdoor unit 6.1.4 Checking the electrical parts of the outdoor unit Turn power ON Is there a voltage of 230V AC Is LD301 turned on? Ensure the power supply. between terminal boards L and N? Normal Check for electrical leakage. After Has the breaker been activated? that, turn on the breaker and make a double check. Check the electrical parts of the indoor unit. (Possibility of failure such as power relay abnormality or communication error) If the 15/25 A fuse is blown out, it Abnormal may have caused another part to go out of order. Please take care. (The Replace the electrical parts of the ... - Page 73 6 Troubleshooting Outdoor unit AC voltage lower than 187 V or greater than 253 V LD301 blinks 10 times. Is there a voltage of AC 220-230 V Check the power supply. between terminal boards L and N? Power supply voltage error AC voltage between 187 and 253 V Check the connection of the Abnormal Is DC voltage between 264 and 358 V? Refer to reactor wire. If it is OK, please Check for the label on the cover of the electrical parts for the replace the reactor. loose or poorly measuring points. inserted reactor. Replace the outdoor electrical parts (due to circuit abnormality). Normal Replace the outdoor electrical parts (due to abnormality in the voltage detection circuit). Abnormal LD301 blinks 7 times. Fix the connection of the Check for loose or poorly inserted thermistors. thermistors.
- Page 74 6 Troubleshooting Outdoor unit Abnormal LD301 blinks 14 times Replace the compressor and then Is the insulation of the Is a leakage breaker installed? Abnormality of DC voltage check the outdoor electrical parts. compressor normal? Normal Replace the outdoor electrical parts. Replace the outdoor electrical parts (Due to Q601 failure). Change the outdoor ele. unit. Failure of Q601 Q601 abnormal Abnormal Operation stopped due to the detection of abnormality Check whether foreign objects are ...
-
Page 75: Checking The Refrigerant Cycle
6 Troubleshooting Outdoor unit 6.1.5 Checking the refrigerant cycle Lighting mode Blinks Blinks Blinks Blinks Blinks Blinks Connect U, V, W phase leads to the 4 times 5 times 6 times 8 times 2 times 3 times Selfdiagnosis power module again and operate the lamp DHW tank. LD301 Within Time until the Approx. Approx. Approx. Approx. 10 seconds lamp lights seconds seconds seconds Possible ... -
Page 76: How To Run The Indoor Unit With The Outdoor Unit Test Switch
6 Troubleshooting Outdoor unit 6.1.6 How to run the indoor unit with the outdoor unit test switch If the indoor electrical parts is out of order and if you wish to run the outdoor unit. 1 Turn on the outdoor terminal boards L and N (220-230 V AC). 2 Confirm that the “LD301” blinks once from the terminal side of the outdoor unit. Afterwards (when about 30 sec elapses after the power turns on), confirm that the “LD301” changes to blinking 9 times (communication error). 3 When the “LD301” is blinks 9 times, if you press the test switch, the “LD301” lights up. 4 When you press the test switch again for 1 sec or longer, the unit stops the operation. N O T E • If you press the test switch for 5 or longer, the self-check diagnosis starts. In this case, turn the power off and start the procedure from 1 again. -
Page 77: Service Call Q&A
6 Troubleshooting Outdoor unit 6.1.7 Service Call Q&A HEATING MODE Water comes out of the outdoor unit The outdoor unit discharges water during defrosting. DEFROST After the ON/OFF button is pressed to stop Defrost is carried out: the system checks heating, the outdoor unit is still working and the outdoor heat exchanger and defrosts defrost icon will appear at the controller it as necessary before stopping operation. main screen OTHERS Loud noise from the outdoor unit is heard when When operation is started, the compressor operation is started rotation speed goes to increase the heating capability, so noise becomes slightly louder. ... -
Page 78: Indoor Unit
6 Troubleshooting Indoor unit 6.2 Indoor unit Alarms through PC-ARFTE Outdoor Alarm Protection unit LED301 Category Type of abnormality Main cause code code Blinking times Transmission Alarm (Not Loose, disconnected, broken or short- Indoor outdoor unit detected) circuited connector. DHW tank thermistor Loose, disconnected, broken or short- Indoor abnormally (THM circuited connector. DHWT Tank over-temperature limit Indoor Failure of control relay. -
Page 79: Operation
6 Troubleshooting Indoor unit 6.2.1 Operation Condition Check the following Check whether a power outage has occurred, a fuse is blown or the breaker has tripped. Unit is not operating Check whether the timer has been set and if it has been correctly set. Check whether the water temperature is correctly set. The water does not become hot or it takes Check whether the air outlet of the outdoor unit has been blocked. a time for it to heat up Check whether the unit is leaking water. Check that the heater has power. The water tank does not exceed 55 °C but is set to a higher temperature. Push the safety thermostat reset switch and check that the heater has power. (*) The outdoor unit discharges water during defrosting. In a cold area, this water could ... -
Page 80: Troubleshooting By Alarm Code (Related To Tank)
6 Troubleshooting Indoor unit 6.2.2 Troubleshooting by alarm code (related to tank) Alarm code Abnormal transmission between the indoor unit and the outdoor unit • This alarm is displayed when an Outdoor unit is not detected for three minutes after the normal transmission between the indoor units and the outdoor units. Also an abnormal transmission is maintained for 30 seconds after the micro- computer is Power ON. The alarm is displayed when the abnormal transmission is maintained for 30 seconds from the starting of the outdoor unit. Alarm code DHW tank thermistor abnormally (THM DHWT • This alarm code is displayed when the thermistor is short-circuited (greater than 100ºC) or cut (less than -10ºC) when DHW is enabled. • This alarm forces all operations to stop (Outdoor & Indoor Units). • The unit should be stopped to release the alarm. Is THM connected to Connect it DHWT CN4 (pin 3 and pin 4)? Is resistance of Faulty thermistor between 0.25 DHWT (Change it) - Page 81 6 Troubleshooting Indoor unit Alarm code Tank over-temperature limit protection • The alarm code is displayed on the LCD controller when the temperature of the water is higher than 86 °C. • This alarm forces the heat pump and the heater to stop. • The unit should be stopped to release the alarm. Is the Is the Check and restart Disconnect Is there Faulty heater heater the thermostat heater wires and check continuity? (Change it) working? working? reset switch heater continuity Disconnect CN15 Relay-AR from the PCB Is there Is the continuity to ...
-
Page 82: Troubleshooting By Protection Code (Outdoor Unit)
6 Troubleshooting Troubleshooting by protection code (Outdoor unit) Alarm code Indoor unit stops answering to Master PC-ARFTE • This alarm is displayed when an indoor unit stops answering to Master PC-ARFTE for more than 3 minutes. • Alarm recovery: When the communication is established again the alarm is recovered. Alarm code Central Alarm, no Central message • This alarm is displayed there is no messages from the central for more than 30 seconds. • Alarm recovery: When the communication is established again the alarm is recovered. 6.3 Troubleshooting by protection code (Outdoor unit) Protection P102 LCD controller has no power code • Outdoor unit LED301 blinks 2 times • This protection code is displayed 3 times before alarm 102 appears at the LCD controller. Abnormal LD301 blinks twice Operation stopped due to the detection of Check the compressor Fix the point of ... - Page 83 6 Troubleshooting Troubleshooting by protection code (Outdoor unit) P104 Protection Compressor changeover failure (switching failure) code • Outdoor unit LED301 blinks 4 times • This protection code is displayed 3 times before alarm 104 appears at the LCD controller. LD301 blinks 4 times This is a failure in starting up the Is the service valve open? compressor. Check the compressor Open the service valve connectors for looseness and continuity. Switchover failure Abnormal Check the compressor Fix the point of for loose connectors and abnormality. continuity of the cord. Normal Is a leakage breaker installed? Abnormal Replace the compressor and Is the insulation of the compressor inspect the outdoor electrical normal? Check it with a megger.
- Page 84 6 Troubleshooting Troubleshooting by protection code (Outdoor unit) Protection P106 Stoppage by OH Thermistor High Temperature code • Outdoor unit LED301 blinks 6 times. • This protection code is displayed continuously until the abnormal situation ends, without leading to an alarm. Abnormal Fix the connection of the An increase of compressor Check whether the OH thermistor is loose or poorly inserted. LD301 blinks 6 times. OH thermistor. temperature has been Increase of compressor detected by the OH Normal thermistor. temperature Abnormal Replace the OH thermistor. Check the OH thermistor for wire breaks and short-circuits. Normal In case that inspecting the refrigerating cycle Inspect the refrigerating cycle. does not help to solve the problem, replace (It may be due to a cause such the outdoor electrical parts (due to abnormality as refrigerant leakage) in the thermistor detection circuit). Protection P107 Thermistor failure code • Outdoor unit LED301 blinks 7 times. • ...
- Page 85 6 Troubleshooting Troubleshooting by protection code (Outdoor unit) P111 Protection Fan abnormality 1 code • Outdoor unit LED301 blinks 11 times. • This protection code is displayed continuously until the abnormal situation ends, without leading to an alarm. Is the wind strong? Check LD301 blinks 11 times This is not a sign of a failure in Momentary interruption due to strong wind. whether restart is possible. the outdoor fan motor or outdoor Operation is resumed when the wind weakens. (It may take several minutes Fan stopped due to strong wind electrical parts. before restarting) It stops Fan motor Check the outdoor fan motor (For abnormal details, see the page on the outdoor ...
- Page 86 6 Troubleshooting Troubleshooting by protection code (Outdoor unit) Protection P114 Overvoltage abnormality code • Outdoor unit LED301 blinks 14 times. • This protection code is displayed 3 times before alarm 114 appears at the LCD controller. Abnormal LD301 blinks 14 times. Replace the compressor and then Is the insulation of the Is a leakage breaker installed? Abnormality of DC voltage check the outdoor electrical parts. compressor normal? Normal Replace the outdoor electrical parts. Replace the outdoor electrical parts (Due to Q601 failure). Change the outdoor ele. unit. Failure of Q601 Q601 abnormal.
- Page 87 6 Troubleshooting Troubleshooting by protection code (Outdoor unit) P116 Protection Software Ip cut stop code • Outdoor unit LED301 blinks 16 times. • This protection code is displayed continuously until the abnormal situation ends, without leading to an alarm. * This is not a failure in case that operation continues after restarting. LD301 blinks 16 times. Compressor stopped since current exceeded the threshold value due to high load. It High load stop restarts after a fixed time (3 minutes).* Is the heat exchanger of the outdoor unit clogged or are its surroundings blocked by something? Remove the cause of the problem. Fix the point of abnormality. Is there any abnormality in the refrigerating cycle? Is the service valve open? Open the service valve. Abnormal Check the compressor ...
-
Page 89: Maintenance Notes
7 Maintenance notes M a i n t e n a n c e n o t e s Index Maintenance work ..........................82 7.1.1 Outdoor unit ..............................82 7.1.2 Indoor unit ..............................83 SMGB0135 rev.0 - 06/2020... -
Page 90: Maintenance Work
7 Maintenance notes Maintenance work 7.1 Maintenance work C A U T I O N • All inspections and checks of the outdoor unit and indoor unit have to be carried out by a licensed technician and never by the user itself. • Before any inspection and check the unit main power supply has to be switched OFF. • Wait minimum 10 minutes or more from all power supply have been turned OFF. • Take care with the crankcase heater. It could operate even when compressor is OFF. • Take care with the electrical box components. Some of them could remain hot after switch OFF the unit. N O T E All these maintenance operations must be done with appropriate materials and following this manual. 7.1.1 Outdoor unit 1 Fan and fan motor • Lubrication: All the fan motors are pre-lubricated and sealed at the factory. Therefore no lubrication maintenance is required. -
Page 91: Indoor Unit
7 Maintenance notes Maintenance work 7.1.2 Indoor unit General procedure To ensure good operation and reliability of the indoor unit its main parts and field wiring have to be checked periodically. The following checks have to be done by qualified technicians at least once a year: 1 Cabinet • Stain: Check for any stain and remove it cleaning if it is the case. • Fixing screw: Check for any loosened screw or any lost screw. Tighten the loosened screws and replace the lost screws. - Page 92 7 Maintenance notes Maintenance work Filling the DWH tank with water Follow the steps below when starting up the unit for the first time or when it has not been used for an extended period of time. 1 Open the outlet water taps of the DHW, to expel all the air from inside the tank. 2 Turn on all the connected mixer taps (hot water side). 3 Open the inlet valve of the DHW tank in order to fill the tank. If there is a shut-down valve installed in the DHW tank outlet, open it to allow circulation through the DHW installation.
- Page 94 Johnson Controls-Hitachi Air Conditioning Spain, S.A.U. Ronda Shimizu, 1 - Políg. Ind. Can Torrella 08233 Vacarisses (Barcelona) Spain Hitachi certifies that our products have met EU consumer safety, health and environmental requirements. Johnson Controls-Hitachi Air Conditioning Spain, S.A.U. is certified with:...