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Panasonic WH-MXC16G9E8 Service Manual
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Panasonic WH-MXC16G9E8 Service Manual

Air-to-water heatpump system mono bloc unit
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This service information is designed for experienced repair technicians only and is not designed for use by the general public.
It does not contain warnings or cautions to advise non-technical individuals of potential dangers in attempting to service a product.
Products powered by electricity should be serviced or repaired only by experienced professional technicians. Any attempt to
service or repair the product or products dealt with in this service information by anyone else could result in serious injury or death.
In order to avoid frostbite, be assured of no refrigerant leakage during the installation or repairing of refrigerant circuit.
WARNING
PRECAUTION OF LOW TEMPERATURE
Order No: PAPAMY1506106CE
Mono bloc Unit
WH-MXC16G9E8
Destination
Europe
Turkey
© Panasonic Corporation 2015.

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Summary of Contents for Panasonic WH-MXC16G9E8

  • Page 1 PRECAUTION OF LOW TEMPERATURE In order to avoid frostbite, be assured of no refrigerant leakage during the installation or repairing of refrigerant circuit. © Panasonic Corporation 2015.

  • Page 2: Table Of Contents

    TABLE OF CONTENTS 14.3 Test Run .............83 1. Safety Precautions ..........3 14.4 Proper Pump Down Procedure ....84 14.5 How To Adjust Water Flow Rate ....84 2. Specifications ............. 5 14.6 Expansion Vessel Pre Pressure Checking .84 3. Features ............... 7 14.7 How to Unlock Cool Mode ......85 14.8...

  • Page 3: Safety Precautions

    1. Safety Precautions  Read the following “SAFETY PRECAUTIONS” carefully before installation of (Mono bloc) Air-to-Water Heatpump system (hereafter referred to as “Mono bloc unit”).  Electrical works and water installation works must be done by licensed electrician and licensed water system installer respectively.
  • Page 4 WARNING This equipment is strongly recommended to be installed with Residual Current Device (RCD) on-site according to the respective national wiring rules or country-specific safety measures in terms of residual current. The unit is only for use in a closed water system. Utilization in an open water system may lead to excessive corrosion of the water piping and risk of incubating bacteria colonies, particularly Legionella, in water.

  • Page 5: Specifications

    2. Specifications Item Unit Refrigerant System Performance Test Condition EN14511 Cooling Condition (Ambient/Water) A35W7 Cooling Capacity 12.20 BTU/h 41600 kcal/h 10490 2.56 kcal/hW 2.20 Heating Condition (Ambient/Water) A7W35 A2W35 Heating Capacity 16.00 16.00 BTU/h 54600 54600 kcal/h 13760 13760 4.28 3.10 kcal/hW 3.68...
  • Page 6 Item Unit Mono bloc Unit Cooling: 4.76 Cooling: - Input Power Heating: 3.74 Heating: 5.16 Maximum Input Power For Mono bloc Unit 10.27 Power Supply 1: Phase (ø) / Max. Current (A) / Max. Input Power (W) Three / 15.5 / 10.27k Power Supply 2: Phase (ø) / Max.

  • Page 7: Features

    3. Features  Inverter Technology Energy saving  High Efficiency  Compact Design  Environment Protection Non-ozone depletion substances refrigerant (R410A)  Easy to use remote control  Weekly Timer setting  Quality Improvement Random auto restart after power failure for safety restart operation Gas leakage protection Prevent compressor reverse cycle Inner protector to protect compressor...

  • Page 8: Location Of Controls And Components

    4. Location of Controls and Components Mono Bloc Unit Air inlet (rear) Top Plate Air inlet (side) Cabinet Front Plate Air outlet Handle (2 pieces front and 2 pieces behind)

  • Page 9: Main Components

    4.1.1 Main Components (VIEW WITHOUT COVER) DETAIL A (WITHOUT OLP COVER) View without cabinet top plate Optional cord / cable :- • Power Supply 1 2-way valve cable (3 × min 0.5mm²) • Power Supply 2 3-way Valve cable (3 × min 0.5mm²) Type •...

  • Page 10: Remote Control

    4.1.2 Location of Control 4.1.2.1 Remote Control The user interface allows the installer and user to setup, use and maintain the unit. 　 OFF/ON Button This button starts or stops the mode operation function of the unit. 11 12 Operation LED This LED indicates the unit is in operation.
  • Page 11 4.1.3 To adjust initial settings Dealer Select menus and determine settings according to the system available in the household. It is recommended that all alterations of settings are done by an authorised dealer or specialist. Operation LED Display • After initial installation, you may manually adjust the settings. The initial setting remains active until the user changes it.

  • Page 12: Remote Control Preparation

    Operation/settings to be done only by the authorised dealer/specialist. Dealer Operation/settings to be done by the authorised dealer/specialist or user. User Booster Heater To activate or deactivate the water tank’s booster heater. Note: If NO is selected, menu 11 is skipped. Booster Heater Delay Timer 20 minutes ~ 1 hour...
  • Page 13 4.1.4 How to use User The system is turned off by an external switch. Turn on or off the system Press When the system is ON, the operation LED is lit and the actual water outlet temperature and outdoor ambient temperature are shown on the display.
  • Page 14 Operation/settings to be done only by the authorised dealer/specialist. Dealer Operation/settings to be done by the authorised dealer/specialist or user. User Display Temperature setting Dealer System temperature setting The system controls the temperature for each menu based on the outdoor ambient temperature. •...

  • Page 15: Holiday Mode

    User Desired temperature setting Shifting the water temperature This easily shifts the water outlet temperature if the setting is undesirable. 1 Press to enter the water temperature shifting mode. 2 Press to change setting. 3 Press to set the desired temperature. (temperature range: -5 °C ~ 5 °C) Temperature setting <Water outlet...

  • Page 16: Weekly Timer Setting

    Operation/settings to be done only by the authorised dealer/specialist. Dealer Operation/settings to be done by the authorised dealer/specialist or user. User User Weekly timer setting Promotes energy saving by allowing you to set up to 6 programmes in any given day. Lights up if Timer operation is selected Indicates the next timer operation programme...
  • Page 17 Dry Concrete Function • During construction to dry the concrete under a preset temperature. 1 Press simultaneously and hold for 5 seconds until the display shows “ ”. 2 Press (The display shows “ ”.) 3 Press to select day. Press to set the desired temperature.

  • Page 18: Dimensions

    5. Dimensions Mono Bloc Unit <Top View> (579) <Front View> <Side View> <Side View> 1283 (30) 318.5 <Back View> Unit: mm 83.5...

  • Page 19: Refrigeration And Water Cycle Diagram

    6. Refrigeration And Water Cycle Diagram Outdoor Side Mono bloc Unit Water Pressure Gauge Expansion Vessel Water Capillary Flow Expansion Liquid Side Tube Switch Valve Strainer Strainer (3-Way Valve) Subcooler Water Inlet (Connect Receiver Water Pump Sanitary Refrigerant Tank) Temp. Expansion Strainer Water Inlet...
  • Page 20 Indoor Side Room Thermo (Optional) Fan Coil Unit (Heating / Cooling) Connect to Mono bloc Unit Terminal Board (Water System) Panel Heater Unit (Heating) 3-Way Valve 2-Way Valve To Water Inlet Mono bloc Unit From Water Outlet Mono bloc Unit Floor Heating Panel (Heating) Heater 1 (3kW)

  • Page 21: Block Diagram

    7. Block Diagram...

  • Page 22: Wiring Connection Diagram

    8. Wiring Connection Diagram...

  • Page 24: Electronic Circuit Diagram

    9. Electronic Circuit Diagram...

  • Page 26: Printed Circuit Board

    10. Printed Circuit Board 10.1 Water System 10.1.1 Main Printed Circuit Board CN-SOLAR CN-TH1 CN-TH2 CN-TH3 CN-FLOW CN-T1 CN-OLP2 CN-REMOTE2 CN-THERMO CN-PUMP2 CN-OLP1 CN-RCV2 AC1-L1 CN-V3 DATA AC1-L2 CN-PWR CN-V2 AC1-L3 CN-HT AC1-N...
  • Page 27 10.1.2 Solar Printed Circuit Board (Optional)

  • Page 28: Refrigerant System

    10.2 Refrigerant System 10.2.1 Main Printed Circuit Board CN-FM1 CN-FM2 CN-V1 CN-HOT CN-RY2 CN-HT1 CN-TH2 CN-HT2 CN-PSW1 CN-RY1 CN-TH3 CN-TH1 CN-HPS CN-DIS CN-EV1 CN-EV2...
  • Page 29 10.2.2 Noise Filter Printed Circuit Board L1-IN FG201 L2-IN FG203 L1-OUT FG202 L2-OUT L3-OUT N-OUT N-IN L3-IN...

  • Page 30: Installation Instruction

    11. Installation Instruction Mono Bloc Unit Dimension Diagram 1283 Front view Rear view Bottom view Drain hose connector Water Outlet Pipe Water Inlet Pipe...
  • Page 31 Main Components (VIEW WITHOUT COVER) DETAIL A (WITHOUT OLP COVER) View without cabinet top plate Optional cord / cable :- • Power Supply 1 2-way valve cable (3 × min 0.5mm²) • Power Supply 2 3-way Valve cable (3 × min 0.5mm²) Type •...

  • Page 32: Select The Best Location

    11.1 Select The Best Location 11.2 Mono Bloc Unit Installation  Mono bloc unit will become heavy when filled with Install the Mono bloc unit in outdoor locations only.  water. Please install the unit on a strong concrete floor Avoid installations in areas where the ambient and consider the weight of the unit and water.

  • Page 33: Piping Installation

    11.3 Piping Installation WARNING This section is for authorized and licensed electrician / water system installer only. Work behind the front plate secured by screws must only be carried out under supervision of qualified contractor, installation engineer or service person. Please engage a licensed water circuit installer to install this water circuit.

  • Page 34: Connect The Cord And Cable To Mono Bloc Unit

    Drainage piping installation  Use a drain hose with inner diameter of 15 mm.  The hose must be installed in a continuously downward direction and left open to the frost-free atmosphere.  If drain hose is long, use a metal support fixture along the way to eliminate the wavy pattern of drain tube. ...
  • Page 35 Bind all power supply cords to the U-Shaped Tube (Covered with foam) with band strap (field supply) Bind all optional cables and cords with this bands. Bind all power supply cords to the Tube (Covered with foam) with band strap (field supply) Apply cut Guide all the Bushing 7...
  • Page 36 8. Tank Sensor shall be resistance type, please refer to Graph 4.1 for the characteristic and details of sensor. Its cable shall be (2 × min 0.3 mm ), double insulation layer (with insulation strength of min 30V) of PVC-sheathed or polychloroprene sheathed cable.

  • Page 37: Wired Remote Control Installation

    11.4.2 Connecting Requirement  The equipment’s power supply 1 complies with IEC/EN 61000-3-2.  The equipment’s power supply 1 complies with IEC/EN 61000-3-3 and can be connected to current supply network.  The equipment’s power supply 2 complies with IEC/EN 61000-3-2. ...

  • Page 38: Selecting The Installation Location

    Embed an outlet box (JIS C 8336) into the wall. Outlet box may be purchased separately. Medium-sized square outlet box (obtain locally) Part No. DS3744 (Panasonic Co., Ltd.) or equivalent. Secure the remote control lower case to the outlet box with the two accessory screws (3).
  • Page 39 B. If Remote Control Cable Is Exposed Use nipper to cut a notch at the upper case. Install the remote control lower case to the (Select the intended feeding-out position) wall with the two accessory screws (4). Route the remote control cable (2) inside the Fasten the screws properly until screw head is lower case in accordance with the intended lower than the rib and reach the base of...

  • Page 40: Checking And Test Run Procedures

    11.5 Checking and Test Run Procedures WARNING Be sure to switch off all the power supply before performing each of the below action. Remove The Cabinet Front Plate (1) Remove the 5 mounting screws as shown in the illustration. (2) Slide the cabinet front plate downward to release the pawls.

  • Page 41: Operation And Control

    12. Operation and Control 12.1 Basic Function Inverter control, which equipped with a microcomputer in determining the most suitable operating mode as time passes, automatically adjusts output power for maximum comfort always. In order to achieve the suitable operating mode, the microcomputer maintains the set temperature by measuring the temperature of the environment and performing temperature shifting.
  • Page 42 Heat Mode Operation Time Chart 3 ways valve 2 ways valve Open Close Heat Pump Backup Heater ID Water Pump Solar Request Solar 3 way valve Timer for backup Backup Heater Backup Heater heater to on back Startup Timer Startup Timer from previous off Mode On Heater On...

  • Page 43: Cooling Operation

    12.1.3 Cooling Operation 12.1.3.1 Thermostat control  Compressor is OFF when Water Outlet Temperature – Internal Water Setting Temperature > -1.5°C for continuously 3 minutes.  Compressor is ON after waiting for 3 minutes, if the Water Outlet Temperature – Water Inlet Temperature (temperature at thermostat OFF is triggered) >3°C.

  • Page 44: Auto Mode Operation

    12.1.4 Auto Mode Operation COOL MODE Heat To Cool Setting Temp. Cool To Heat Setting Temp. HEAT MODE Outdoor Ambient  Control details: To enable the unit to operate either heat or cool mode automatically, heat to cool set temperature and cool to heat set temperature can be set by control panel.
  • Page 45 12.1.5 Tank Mode Operation Control contents:  3 ways valve direction 3 ways valve switch to tank side during Tank Thermo ON condition. Switch 3 ways valve to room side when tank achieve Tank Thermo OFF temperature and SOLAR turn ON condition. ...
  • Page 46 Tank Mode Tank set Temp. = 65°C 3 ways valve Tank side Tank Thermo Off Heat Pump Booster Heater ID Water Pump Booster Heater Delay Time Tank Mode (Solar Priority is not set) 3 ways valve HeatPump Thermo Off Heat Pump Tank Thermo Off Tank Thermo On Booster Heater...
  • Page 47 12.1.6 Heat + Tank Mode Operation Setting 1: When Heating priority is set by control panel: 1. 3 ways valve control: o 3 ways valve switch to room side during External Room Thermo ON OR Solar 3 ways valve ON OR Tank Thermo OFF time, and switch to tank side at External Room Thermo OFF AND Solar 3 ways valve OFF.
  • Page 48 Characteristic of heat pump thermo ON/OFF under tank side condition Water Outlet Thermo condition Heat pump THERMO OFF TEMP: 1. Heat pump THERMO OFF TEMP = 53°C + [+4°C]. 2. Water outlet temperature > Heat pump THERMO OFF TEMP for continuous 90 seconds, heat pump OFF and water pump continue ON.
  • Page 49 Heat + Tank Mode (Heating priority set) Under Solar Priority Set Condition: Under Solar Priority Not Set Condition:...
  • Page 50 Setting 2: When heating priority is not set by control panel:  When Solar Priority is set/not set by control panel: 1. 3 ways valve control: 3 ways valve switch to room side during heating heat-up interval, and switch to tank side during tank heat-up interval.
  • Page 51 Characteristic of heat pump thermo ON/OFF under tank side condition Water Outlet Thermo condition Heat pump THERMO OFF TEMP: 1. Heat pump THERMO OFF TEMP = 53°C + [+4°C] 2. Water outlet temperature > Heat pump THERMO OFF TEMP for continuous 90 seconds, heat pump OFF but water pump continue ON.
  • Page 52 Heat + Tank Mode (Heating priority not set) Tank set Temp. = 60°C Interval Timer Interval Timer 3 ways valve Room side Tank side Tank side Heat Pump Booster Heater ID Water Pump Switch to tank side even the heating Turn to room heating interval compulsory interval timer not yet completed when and heat up room for the heating...
  • Page 53 Room thermo Room Thermo Start with tank Go in tank interval mode first only after solar OFF 3 ways valve 2 ways valve Switch to tank heat-up when room thermo OFF Tank thermo Heat pump OFF (End) thermo OFF Heat Pump Heat pump OFF at room side when room thermo Water Pump...
  • Page 54 Heat + Tank Mode (Heating priority not set) Under Solar Priority Not Set Condition: Room thermo Room Thermo Start with tank Go in room interval mode first only after solar OFF 3 ways valve 2 ways valve Switch to tank heat-up when room thermo OFF Tank thermo Heat pump...
  • Page 55 12.1.7 Cool + Tank Mode Operation 12.1.7.1 Cooling Priority SET 1. 3 ways valve control:  3 ways valve switch to room side during External Room Thermo ON OR Tank Thermo OFF time, and switch to tank side at External Room Thermo OFF AND Solar 3 ways valve OFF. 2.
  • Page 56 Characteristic of heat pump thermo ON/OFF under tank side condition a) Water Outlet Thermo Condition Heat pump THERMO OFF TEMP: 1. Heat pump THERMO OFF TEMP = [53°C] + [+4°C]. 2. Water outlet temperature > Heat pump THERMO OFF TEMP for continuous 3 minutes, heat pump OFF. Next THERMO ON TEMP: 1.
  • Page 57 12.1.7.2 Cooling Priority NOT SET 1. 3 ways valve control:  3 ways valve switch to room side during room cooling interval and switch to tank side during tank heat-up interval. Both modes will switch alternately. Tank mode is the initial running mode of this cool + tank mode. 2.
  • Page 58 Water Inlet Thermo Condition Heat pump THERMO OFF TEMP: Water inlet temperature > [55°C] for continuous 60 seconds, heat pump OFF. THERMO ON TEMP: THERMO ON TEMP = Water inlet temperature > [55°C]. c) Solar Operation Condition (Only under Solar Priority Set Condition) ...
  • Page 59 12.1.8 Setting Water Outlet Temperature for Heat Mode  The set temperature defines the parameters for the outdoor ambient temperature dependent operation of the unit. Where by the internal water setting temperature is determined automatically depending on the outdoor temperature. The colder outdoor temperatures will result in warmer water and vice versa. The user has the possibility to shift up or down the target water temperature by control panel setting.

  • Page 60: Outdoor Fan Motor Operation

    12.1.9 Water Temperature Thermo Shift Setting  Switchs are ignored during “PUMPDW” = ON.  Switchs are ignored during “STATUS” = ON. ▲ ▼  “ ”, “ ”, ”SELECT” switch are ignored if “SETTING” = OFF.  “CANCEL” switch is ignored if “SETTING” = OFF & “STATUS” = OFF. ...

  • Page 61: Water Pump

    12.2 Water Pump 12.2.1 Water Pump Control  Once the indoor unit is ON, the water pump will be ON immediately and no error judgement for 9 minutes. However, during this 9 minutes operation, if there is any abnormality cause at outdoor or malfunction, the compressor should be OFF immediately and restart delay after 3 minutes.
  • Page 62 12.2.2 A-class Pump Specification Power for drive DC280-373V Pump Power for control DC15±10% Control Signal DC0V-DC6V Feedback Speed (puls signal) 4puls/rotation Control signal is analog voltage (DC0V-6V) generated by microcomputer PWM port. Microcomputer can change analog voltage by changing PWM duty. 12.2.3 Water Flow Rate Setting ...

  • Page 63: Pump Down Operation [Service Mode: 01]

    12.2.4 Water Pump Speed Feedback Error  Basically pump speed feedback is control by micon.  When pump speed is below low limit or over high limit for a few seconds, micon detect pump error and system is stopped.  Error detection conditions: ...

  • Page 64: Indoor Unit Safety

    12.5 Indoor Unit Safety 12.5.1 Indoor Unit Safety Control When water pump is ON, the system will start checking flow switch status (ON/OFF). If the flow switch ON for 10 seconds, the system will check on the water inlet temperature for 10 seconds. If the water inlet temperature not exceeds 80°C, the water pump shall be continuously running with normal mode.

  • Page 65: Indoor Back-Up Heater Control

    12.8 Indoor Back-Up Heater Control 12.8.1 Indoor Electric Heater Control Normal Heating Mode Heater On condition: a. Heater switch is ON b. After Heatpump thermo ON for [30] mins c. After water pump operate [9] mins d. Outdoor air temperature < Outdoor set temperature for heater e.

  • Page 66: Tank Booster Heater Control

    12.9 Tank Booster Heater Control 12.9.1 Tank Booster Heater Control Heating operation condition: Heater OFF Tank set temperature + Tank set temperature + [-7°C] [+2°C] Heater ON Booster heater Turn On condition: After BOOSTER HEATER DELAY TIMER fulfill during heatpump startup time in tank mode, or during switching from heating heat-up interval to tank heat-up interval in heat + tank mode (heating priority not set).

  • Page 67: Sterilization Mode

    12.11 Sterilization Mode  Purpose: To sterilize water tank by setting the required boiling temperature.  Control start condition: Tank connection menu is set to YES by control panel. Sterilization menu is set to YES by control panel. Sterilization signal received from control panel by timer. ...

  • Page 68: Anti Freeze Control

    12.13 Anti Freeze Control  Anti freeze protection control menu can be set YES or NO by control panel.  In heatpump system, there are 3 types of anti freeze control: 1. Expansion tank anti-freeze control  Expansion tank anti freeze heater ON condition: Outdoor ambient temp.

  • Page 69: Solar Operation (Optional)

    12.14 Solar Operation (Optional) 12.14.1 Solar Operation: External solar heat source signal can be connect to unit for proper control of heat source switching during tank boiling time. Control according to preset whether solar priority is set or not. When tank connection is NOT set at SETTING mode, solar operation is disabled. When Pump A (from solar pump station) is detected On through connection Y3 and Y4, then the Solar pump 3 Way Valve is requested ON (Refer to figure below).
  • Page 70 Solar Operation Chart in different mode and condition Tank Mode (Solar Priority SET condition) Tank Mode (Solar Priority NOT SET condition)
  • Page 71 Heat + Tank Mode (Heating Priority NOT SET) (Solar Priority SET condition) When solar 3 way valve turn on during Tank interval, cancel Tank interval immediately and switch 3-way valve to the After heating/cooling interval, stand by to go in tank side after solar 3 way room side and start a heating/cooling interval.
  • Page 72 Heat + Tank Mode (Heating Priority SET) & Cool + Tank Mode 3 way valve Room Side Heatpump Booster heater Off due to solar 3 way valve on Booster heater Thermo Off Solar priority set Booster heater Solar priority not Solar request Solar off due to upper limit...

  • Page 73: External Room Thermostat Control (Optional)

    12.15 External Room Thermostat Control (Optional) Purpose: Better room temperature control to fulfill different temperature request by external room thermostat. Recommended external room thermostat: Maker Characteristic Siemen (REV200) Touch panel Siemen (RAA20) Analog Connection of external room thermostat: Wire Connection and thermo characteristic of Siemen REV200: Setting L/L1 (H) Heat Thermo...

  • Page 74: Three Ways Valve Control

    12.16 Three Ways Valve Control Purpose: - 3 ways valve is used to change flow direction of hot water from heat pump between heating side and tank side. Control contents: 3 ways valve switch Off: During 3 ways valve switch Off time, the hot water will provide heat capacity to heating side. 3 ways valve switch On: During 3 ways valve switch On time, the hot water will provide heat capacity to tank side.

  • Page 75: External Off/On Control

    12.18 External OFF/ON Control  Communication circuit between indoor unit and external controller is as per below. Panasonic 12V_4 External Controller 0.01µ G2 G2 CN-THERMO  Maximum length of communication cable is 20 meter.  Control content: External Control Switch...

  • Page 76: Holiday Mode

    12.19 Holiday Mode  Purpose: Promotes energy saving by allowing the user to stop the system during holiday and enables the system to resume at the preset temperature after holiday.  Control details: Range of days can be set in holiday mode is from 1 to 999 days. After days of holiday have been set, heat pump will stop and only resume operation at 12.00am at the end of holiday countdown.

  • Page 77: Protection Control

    13. Protection Control 13.1 Protection Control for All Operations 13.1.1 Time Delay Safety Control The compressor will not start for three minutes after stop of operation. 13.1.2 30 Seconds Forced Operation Once the compressor starts operation, it will not stop its operation for 30 seconds. However, it can be stopped using control panel at indoor unit.
  • Page 78 13.1.6 Low Frequency Protection Control 2  When all the below conditions comply, the minimum compressor frequency will change to lower frequency. Temperature, T, for: Heating Cooling Outlet water (°C) T < 14 or T ≥ 48 T < 14 or T ≥ 30 Outdoor air (°C) T <...

  • Page 79: Heat Exchanger (Hex) Protection Control

    13.2 Heat Exchanger (HEX) Protection Control Water Inlet Free Zone (Compressor ON, Heater OFF) 12° 10°C Deice (Compressor OFF, Heater ON)  Start Condition: - When outdoor ambient temperature is less than 10°C.  Control Details: - Heater will turn ON and heat pump turn OFF when water inlet temperature below 10°C. - Heater will turn OFF and heat pump turn ON when water inlet temperature increase more than 12°C.

  • Page 80: Protection Control For Heating Operation

    13.3 Protection Control for Heating Operation 13.3.1 Outdoor Air Temperature Control The maximum current value is regulated when the outdoor air temperature rises above 14°C in order to avoid compressor overloading. 13.3.2 Deice Operation When outdoor pipe temperature and outdoor air temperature is low, deice operation start where outdoor fan motor stop.
  • Page 81  Deice operation time diagram a. Deice mode 1 control: Free Free Compressor Four way valve ID pump OD fan Free Free Expansion valve Free max 9 minutes 30 seconds deice 1 b. Deice mode 2 control: Deice mode 2 Normal Heating Deice...

  • Page 82: Protection Control For Cooling Operation

    13.4 Protection Control for Cooling Operation 13.4.1 Outdoor Air Temperature Control  The Compressor operating frequency is regulated in accordance to the outdoor air temperature as shown in the diagram below.  This control will begin 1 minute after the compressor starts. ...

  • Page 83: Servicing Mode

    14. Servicing Mode 14.1 Remove The Cabinet Front Plate 1. Remove the 5 mounting screws as shown in the illustration. 2. Slide the cabinet front plate downward to release the pawls. Then, pull it toward front to remove it. Cabinet Front Plate Mounting screws Mounting screws...

  • Page 84: Proper Pump Down Procedure

    Before adjust the water flow rate, make sure that the total water volume in the installation is 50 litres minimum for heating side. The default setting is SPEED 6 for WH-MXC16G9E8. Please ensure the minimum flow rate is not less than 13 l/min and not more than 50 l/min.

  • Page 85: How To Unlock Cool Mode

    14.7 How to Unlock Cool Mode Press buttons SET and SERVICE for 5 seconds. Press SELECT button. Unlock COOL mode with ▲/▼. Press SET button. 14.8 Dry Concrete [SERVICE MODE: 03]  If Dry Concrete has been set, Dry Concrete status can be activated and monitored by following procedure. Press SERVICE button for 5 seconds.

  • Page 86: Maintenance Guide

    15. Maintenance Guide In order to ensure optimal performance of the unit, seasonal inspections on the unit, external filter and field wiring have to be carried out at regular intervals. This maintenance should be carried out by authorized dealer. 1. Water pressure Water pressure should not lower than 0.05 MPa (with inspects the pressure gauge).
  • Page 87 WARNING Be careful not to touch parts other than RCCB/ELCB test button when the power is supplied to Indoor Unit. Else, electrical shock may happen. Push the “TEST” button on the RCCB/ELCB. The lever would turn down and indicate “0” and indicate green colour if it functions normal.

  • Page 88: Troubleshooting Guide

    16. Troubleshooting Guide 16.1 Refrigeration Cycle System In order to diagnose malfunctions, make sure that there are no electrical problems before inspecting the refrigeration cycle. Such problems include insufficient insulation, problem with the power source, malfunction of a compressor and a fan. The normal pressure of the refrigeration cycle depends on various conditions, the standard values for them are shown in the table on the right.

  • Page 89: Relationship Between The Condition Of The Mono Bloc Unit And Pressure And Electric Current

    16.2 Relationship Between The Condition Of The Mono Bloc Unit And Pressure And Electric Current Heating Mode Cooling Mode Condition of the Electric current Electric current Mono bloc Unit Low Pressure High Pressure during Low Pressure High Pressure during operation operation Water leakage or ...

  • Page 90: Breakdown Self Diagnosis Function

    16.3 Breakdown Self Diagnosis Function 16.3.1 Self Diagnosis Function (Three Digits Alphanumeric Code)  When abnormality occur during operation, the system will stop operation, and OFF/ON remote control LED will blink and error code will display on the remote control Timer display LCD. ...

  • Page 91: Error Codes Table

    16.4 Error Codes Table Diagnosis display Abnormality/Protection control Abnormality Judgement Primary location to verify No abnormality detected — —  Indoor/outdoor connection wire  Indoor/outdoor PCB Indoor/Outdoor capacity unmatched 90s after power supply  Specification and combination table in catalogue Outdoor compressor temperature sensor ...
  • Page 92 Diagnosis display Abnormality/Protection control Abnormality Judgement Primary location to verify  Water inlet temperature sensor Indoor water inlet temperature sensor Continue for 5 sec. abnormality (defective or disconnected)  Outdoor discharge pipe temperature Outdoor discharge pipe temperature Continue for 5 sec. sensor abnormality sensor (defective or disconnected) 4 times occurrence within 10...

  • Page 93: Self-Diagnosis Method

    16.5 Self-diagnosis Method 16.5.1 Connection Capability Rank Abnormality (H12) Malfunction Decision Conditions: During startup operation of cooling and heating, the capability rank of indoor checked by the outdoor is used to determine connection capability rank abnormality. Malfunction Caused: 1. Wrong model interconnected. 2.
  • Page 94 16.5.2 Compressor Tank Temperature Sensor Abnormality (H15) Malfunction Decision Conditions: During startup and operation of cooling and heating, the temperatures detected by the compressor tank temperature sensor are used to determine sensor error. Malfunction Caused: 1. Faulty connector connection. 2. Faulty sensor. 3.
  • Page 95 16.5.3 Water Pump Abnormality (H20) Malfunction Decision Conditions: During startup and operation of cooling and heating, the rotation speed detected by the IPM of water pump motor during water pump operation is used to determine abnormal water pump (feedback of rotation > 6,000rpm or < 1,000rpm).
  • Page 96 16.5.4 Indoor Refrigerant Liquid Temperature Sensor Abnormality (H23) Malfunction Decision Conditions: During startup and operation of cooling and heating, the temperatures detected by the indoor refrigerant liquid temperature sensor are used to determine sensor error. Malfunction Caused: 1. Faulty connector connection. 2.
  • Page 97 16.5.5 Service Valve Error (H27) Malfunction Decision Conditions: During cooling operation, when:- [a] Indoor refrigerant pipe temperature at compressor startup - present indoor refrigerant pipe temperature < 2°C [b] Present high pressure - high pressure at compressor startup < 5kg/cm² **Judgment only for first time cooling operation and not during pump down operation.
  • Page 98 16.5.6 Compressor Low Pressure Protection (H42) Malfunction Decision Conditions: During operation of heating and after 5 minutes compressor ON, when outdoor pipe temperature below -29°C or above 26°C is detected by the outdoor pipe temperature sensor. Malfunction Caused: 1. Dust accumulation on the outdoor unit heat exchanger. 2.
  • Page 99 16.5.7 Water Flow Switch Abnormality (H62) Malfunction Decision Conditions: During operation of cooling and heating, the water flow detected by the indoor water flow switch is used to determine water flow error. Malfunction Caused: 1. Faulty water pump. 2. Water leak in system. 3.
  • Page 100 16.5.8 Outdoor High Pressure Abnormality (H64) Malfunction Decision Conditions: During operation of cooling and heating, when the outdoor high pressure sensor output signal is 0Vdc or 5Vdc. Malfunction Caused: 1. Faulty connector connection. 2. Faulty sensor. 3. Faulty outdoor unit PCB (main). Abnormality Judgment: Continue 4 times in 20 minutes.
  • Page 101 16.5.9 Deice Circulation Error (H65) Malfunction Decision Conditions: During deice operation, flow switch detects water flow for 10 seconds during deice. Malfunction Caused: 4. Secondary pump. 5. Flow switch faulty. 6. Water pump faulty. 7. Indoor PCB. Abnormality Judgment: Continue 10 seconds. Troubleshooting: For safety reason and to prevent component breakdown, Caution...
  • Page 102 16.5.10 Indoor Backup Heater OLP Abnormality (H70) Malfunction Decision Conditions: During operation of indoor backup heater, when no power supplies to indoor backup heater or OLP open circuit. Malfunction Caused: 1. Faulty power supply connector connection. 2. Faulty connector connection. 3.
  • Page 103 16.5.11 Tank Temperature Sensor Abnormality (H72) Malfunction Decision Conditions: When tank connection is set to ON, the temperatures detected by the tank temperature sensor are used to determine sensor error. Malfunction Caused: 1. Faulty connector connection. 2. Faulty sensor. 3. Faulty indoor unit PCB (main). Abnormality Judgment: Continue for 5 seconds.
  • Page 104 16.5.12 Indoor-Control Panel Communication Abnormality (H76) Malfunction Decision Conditions: During standby and operation of cooling and heating, indoor-remote control error occur. Malfunction Caused: 1. Faulty connector connection. 2. Faulty remote control 3. Faulty indoor unit PCB (main).
  • Page 105 16.5.13 Indoor/Outdoor Abnormal Communication (H90) Malfunction Decision Conditions: During operation of cooling and heating, the data received from outdoor unit in indoor unit signal transmission is checked whether it is normal. Malfunction Caused: 1. Faulty outdoor unit PCB (main). 2. Faulty indoor unit PCB (main). 3.
  • Page 106 16.5.14 Tank Booster Heater OLP Abnormality (H91) Malfunction Decision Conditions: During operation of tank booster heater, and tank booster heater OLP open circuit. Malfunction Caused: 1. Faulty connector connection. 2. Faulty tank booster heater overload protector (OLP). 3. Faulty indoor unit PCB (main). Abnormality Judgment: Continue for 60 seconds.
  • Page 107 16.5.15 Unspecified Voltage between Indoor and Outdoor (H95) Malfunction Decision Conditions: The supply power is detected for its requirement by the indoor/outdoor transmission. Malfunction Caused: 1. Insufficient power supply. 2. Faulty outdoor unit PCB (noise filter/main).
  • Page 108 16.5.16 Outdoor High Pressure Protection (H98) Malfunction Decision Conditions: During operation of heating, when pressure 4.0 MPa and above is detected by outdoor high pressure sensor. Malfunction Caused: 1. Faulty water pump. 2. Insufficient water flow rate in system. 3. Water leak in system. 4.
  • Page 109 16.5.17 Indoor Freeze-up Protection (H99) Malfunction Decision Conditions: During anti-freezing control in cooling operation, when the indoor refrigerant liquid temperature < 0°C. Malfunction Caused: 1. Faulty water pump. 2. Insufficient water flow rate in system. 3. Water leak in system. 4.
  • Page 110 16.5.18 Outdoor High Pressure Switch Activate (F12) Malfunction Decision Conditions: During operation of cooling and heating, when pressure 4.5MPa and above is detected by outdoor high pressure switch. Malfunction Caused: 1. Dust accumulation on the outdoor unit heat exchanger. 2. Air short circuit at outdoor unit. 3.
  • Page 111 16.5.19 Compressor Rotation Failure (F14) Malfunction Decision Conditions: A compressor rotation failure is detected by checking the compressor running condition through the position detection circuit. Malfunction Caused: 1. Compressor terminal disconnect. 2. Faulty outdoor unit PCB (main). 3. Faulty compressor. Abnormality Judgment: Continue 4 times in 20 minutes.
  • Page 112 16.5.20 Outdoor Fan Motor (DC Motor) Mechanism Locked (F15) Malfunction Decision Conditions: The rotation speed detected by the Hall IC of the fan motor during fan motor operation is used to determine abnormal fan motor (feedback of rotation > 2550rpm or < 50rpm). Malfunction Caused: 1.
  • Page 113 16.5.21 Input Over Current Detection (F16) Malfunction Decision Conditions: During operation of cooling and heating, when outdoor current above 27.9A is detected by the current transformer (CT) in the outdoor unit PCB. Malfunction Caused: 1. Excessive refrigerant. 2. Faulty outdoor unit PCB (main). Abnormality Judgment: Continue 3 times in 20 minutes.
  • Page 114 16.5.22 Compressor Overheating (F20) Malfunction Decision Conditions: During operation of cooling and heating, when temperature above 107°C is detected by the compressor tank temperature sensor. Malfunction Caused: 1. Faulty compressor tank temperature sensor. 2. 2/3 way valve closed. 3. Refrigerant shortage (refrigerant leakage). 4.
  • Page 115 16.5.23 IPM Overheating (F22) Malfunction Decision Conditions: During operation of cooling and heating, when temperature 95°C is detected by the outdoor IPM temperature sensor. Malfunction Caused: 1. Faulty outdoor unit fan motor. 2. Faulty outdoor unit PCB (main). Abnormality Judgment: Continue 3 times in 30 minutes.
  • Page 116 16.5.24 Output Over Current Detection (F23) Malfunction Decision Conditions: During operation of cooling and heating, when outdoor DC current is above 54.0A ± 4.0A (for: UD12~16CE) is detected by the IPM DC Peak sensing circuitry in the outdoor unit PCB (main). Malfunction Caused: 1.
  • Page 117 16.5.25 Refrigeration Cycle Abnormality (F24) Malfunction Decision Conditions: 1. During operation of cooling and heating, compressor frequency > Frated. 2. During operation of cooling and heating, running current: 0.65A < I < 1.65A. 3. During operation of cooling, water inlet temperature - indoor refrigerant liquid temperature < 5°C. 4.
  • Page 118 16.5.26 Four Way Valve Abnormality (F25) Malfunction Decision Conditions: 1. During heating operation, when the indoor pipe temperature of thermostat ON indoor unit < 0°C. 2. During cooling operation, when the indoor pipe temperature of thermostat ON indoor unit > 45°C. Malfunction Caused: 1.
  • Page 119 16.5.27 Outdoor High Pressure Switch Abnormal (F27) Malfunction Decision Conditions: During compressor stop, and outdoor high pressure switch is remain opened. Malfunction Caused: 1. Faulty connector connection. 2. Faulty switch. 3. Faulty outdoor unit PCB (main). Abnormality Judgment: Continue for 1 minute.
  • Page 120 16.5.28 Indoor Water Outlet Temperature Sensor 2 Abnormality (F30) Malfunction Decision Conditions: During startup and operation of cooling and heating, the temperatures detected by the indoor water outlet temperature sensor 2 are used to determine sensor error. Malfunction Caused: 1. Faulty connector connection. 2.
  • Page 121 16.5.29 Outdoor Air Temperature Sensor Abnormality (F36) Malfunction Decision Conditions: During startup and operation of cooling and heating, the temperatures detected by the outdoor air temperature sensor are used to determine sensor error. Malfunction Caused: 1. Faulty connector connection. 2. Faulty sensor. 3.
  • Page 122 16.5.30 Indoor Water Inlet Temperature Sensor Abnormality (F37) Malfunction Decision Conditions: During startup and operation of cooling and heating, the temperatures detected by the indoor water inlet temperature sensor are used to determine sensor error. Malfunction Caused: 1. Faulty connector connection. 2.
  • Page 123 16.5.31 Outdoor Discharge Pipe Temperature Sensor Abnormality (F40) Malfunction Decision Conditions: During startup and operation of cooling and heating, the temperatures detected by the outdoor discharge pipe temperature sensor are used to determine sensor error. Malfunction Caused: 1. Faulty connector connection. 2.
  • Page 124 16.5.32 Power Factor Correction (PFC) Abnormality (F41) Malfunction Decision Conditions: During operation of cooling and heating, when the PFC protection circuitry in the outdoor unit PCB (main) senses abnormal high DC voltage level. Malfunction Caused: 1. Power supply surge. 2. Compressor windings not uniform. 3.
  • Page 125 16.5.33 Outdoor Pipe Temperature Sensor Abnormality (F42) Malfunction Decision Conditions: During startup and operation of cooling and heating, the temperatures detected by the outdoor pipe temperature sensor are used to determine sensor error. Malfunction Caused: 1. Faulty connector connection. 2. Faulty sensor. 3.
  • Page 126 16.5.34 Outdoor Defrost Temperature Sensor Abnormality (F43) Malfunction Decision Conditions: During startup and operation of cooling and heating, the temperatures detected by the outdoor defrost temperature sensor are used to determine sensor error. Malfunction Caused: 1. Faulty connector connection. 2. Faulty sensor. 3.
  • Page 127 16.5.35 Indoor Water Outlet Temperature Sensor Abnormality (F45) Malfunction Decision Conditions: During startup and operation of cooling and heating, the temperatures detected by the indoor water outlet temperature sensor are used to determine sensor errors. Malfunction Caused: 1. Faulty connector connection. 2.
  • Page 128 16.5.36 Outdoor Current Transformer Open Circuit (F46) Malfunction Decision Conditions: A current transformer (CT) open circuit is detected by checking the compressor running frequency (≥ rated frequency) and CT detected input current (< 0.65A) for continuously 20 seconds. Malfunction Caused: 1.
  • Page 129 16.5.37 Cooling High Pressure Overload Protection (F95) Malfunction Decision Conditions: During operation of cooling, when pressure 4.0MPa and above is detected by outdoor high pressure sensor. Malfunction Caused: 1. Dust accumulation in the outdoor unit heat exchanger. 2. Air short circuit at outdoor unit. 3.

  • Page 130: Disassembly And Assembly Instructions

    17. Disassembly and Assembly Instructions WARNING High Voltage are generated in the electrical parts area by the capacitor. Ensure that the capacitor has discharged sufficiently before proceeding with repair work. Failure to heed this caution may result in electric shocks. WARNING Be sure to switch off all the power supply before performing each of the below action.

  • Page 131: To Remove The Cabinet Rear Plate

    17.3 To Remove The Cabinet Rear Plate 17.4 To Remove Pressure Gauge 17.5 To Remove RCCB...

  • Page 132: To Remove Transformer And Electronic Controller Board

    17.6 To Remove Transformer and Electronic Controller Board Electronic Controller Board Using screw driver remove screw to remove Electronic Controller Board. Disconnect all connectors of CN-HT(WHT), CN-V2(WHT), CN-V3(GRN), CN-RCV2(WHT), CN-OLP2(WHT), CN-TH2(WHT), CN-THERMO(WHT), CN-TH3(WHT), CN-TH1(WHT), CN-FLOW(YLW), CN-REMOTE2(WHT), CN-OLP1(WHT), CN-PUMP2(WHT), CN-SOLAR(WHT), CN-T1(WHT), lead wire T2(BLK) and T1(BLK) from the Electronic Controller Board.

  • Page 133: To Remove Pressure Relief Valve, Flow Switch And Air Purge Valve

    17.7 To Remove Pressure Relief Valve, Flow Switch and Air Purge Valve Pressure relief valve 3. Pull outward to remove Air Purge Valve 5. Turn the Air Purge Valve Pressure Relief Valve. anti-clockwise then remove. 1. Remove 2 retaining rings. Flow Switch 2.

  • Page 134: To Remove Water Pump

    17.8 To Remove Water Pump Water Pump 3. Loosen the nut. 2. Remove the screw from the particular plate. 1. Disconnect CN-PUMP2 connector 4. Remove 2 retaining rings, then pull out the Water Pump. When reinstall the water pipe, use grease or water at the joining.

  • Page 135: To Remove Bottle Complete

    17.9 To Remove Bottle Complete 2. Remove the retaining ring. 4. Remove 4 screws to remove the Bottle Complete. 3. Loosen 2 nuts. 1. Remove the OLP teminal cover, then detached lead wire HT1-L2 (orange) and AC2-L3 (black) from the OLP terminal. Bottle Complete When reinstall the water pipe, use grease or water at the joining.

  • Page 136: Technical Data

    18. Technical Data 18.1 Operation Characteristics Heating Characteristics at Different Outdoor Air Temperature Condition Outdoor air temperature : 7°C (DBT), 6°C (WBT) Indoor water inlet temperature : 30°C Indoor water outlet temperature : 35°C Piping length : 7 m 18.000 17.000 16.000 15.000...
  • Page 137 Cooling Characteristics at Different Outdoor Air Temperature Condition Outdoor air temperature : 35°C (DBT), -°C (WBT) Indoor water inlet temperature : 12°C Indoor water outlet temperature : 7°C Piping length : 7 m 14.500 13.000 11.500 10.000 8.500 7.000 Outdoor Temperature (°C) 5.000 4.300 3.600...
  • Page 138 Cooling Characteristics at Different Outdoor Air Temperature Condition Outdoor air temperature : 35°C (DBT), -°C (WBT) Indoor water inlet temperature : 12°C Indoor water outlet temperature : 18°C Piping length : 7 m 15.500 14.000 12.500 11.000 9.500 8.000 Outdoor Temperature (°C) 4.500 3.800 3.100...

  • Page 139: Heating Capacity Table

    18.2 Heating Capacity Table Water Out (°C) Input Input Input Input Input Input Capacity Capacity Capacity Capacity Capacity Capacity Outdoor Air (°C) Power Power Power Power Power Power 16000 6300 16000 6890 16000 7450 16000 8100 16000 8480 15200 8960 16000 5850 16000...

  • Page 140: Exploded View And Replacement Parts List

    19. Exploded View and Replacement Parts List 19.1 (Refrigerant System)
  • Page 141 × 8...
  • Page 142 Note The above exploded view is for the purpose of parts disassembly and replacement. The non-numbered parts are not kept as standard service parts.
  • Page 143 <Model: Refrigerant System> SAFETY REF. NO. DESCRIPTION & NAME QTY. WH-MXC16G9E8 REMARK BASE PAN ASS’Y CWD52K1276 COMPRESSOR 5JD650XBA22 BUSHING - COMPRESSOR MOUNT CWH50055 NUT - COMPRESSOR MOUNT CWH561049 CRANKCASE HEATER CWA341053 CONDENSER COMPLETE ACXB32C0001 HIGH PRESSURE SENSOR CN-HPS CWA501463 DISCHARGE MUFFLER...
  • Page 144 SAFETY REF. NO. DESCRIPTION & NAME QTY. WH-MXC16G9E8 REMARK SENSOR - COMP. (BYPASS & EVA EXIT TEMP) CN-TH3 CWA50C3165 SOUND PROOF MATERIAL CWG302598 SOUND PROOF MATERIAL CWG302975 MAGNET RELAYS (RY1) K6C2AGA00002 MAGNET RELAYS (RY2) K6C4E8A00001 REACTOR G0C353J00001 PTC THERMISTORS D4DDG1010001 CAPACITOR - (3.5MF/440V)

  • Page 145: Water System)

    19.2 (Water System)
  • Page 146 Note The above exploded view is for the purpose of parts disassembly and replacement. The non-numbered parts are not kept as standard service parts.
  • Page 147 <Model: Water System> SAFETY REF. NO. DESCRIPTION & NAME QTY. WH-MXC16G9E8 REMARK BASE PAN ASS’Y CWD52K1381 HOT WATER COIL - COMPLETE CWB90C1142 RECEIVER CWB141073 FLOW SWITCH CN-FLOW CWB621128 PUMP CWB532116 BOTTLE COMP. CWH90C0056 HEATER ASS'Y CWA34K1049 SOUND PROOF MATERIAL CWG302599...

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