Panasonic WH-MDF12C6E5 Service Manual Download Page 67 | Manualshive

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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.

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Summary of Contents for WH-MDF12C6E5

Page 1: ... repairing of refrigerant circuit WARNING 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 te...

Page 2: ... Optional 60 13 Protection Control 61 13 1 Protection Control For All Operations 61 13 2 Protection Control for Heating Operation 63 14 Servicing Mode 64 14 1 Test Run 64 14 2 Proper Pump Down Procedure 64 14 3 How To Adjust Water Flow Rate 64 14 4 Expansion Vessel Pre Pressure Checking 64 15 Maintenance Guide 65 16 Troubleshooting Guide 67 16 1 Refrigeration Cycle System 67 16 2 Relationship Betw...

Page 3: ...current will cause electrical shock or fire 6 Do not tie up the power supply cord into a bundle by band Abnormal temperature rise on power supply cord may happen 7 Do not insert your fingers or other objects into the unit high speed rotating fan may cause injury 8 Do not sit or step on the unit you may fall down accidentally 9 Keep plastic bag packaging material away from small children it may cli...

Page 4: ...lation re installation and during repairing a refrigeration parts Take care of the liquid refrigerant it may cause frostbite 3 Make sure the power supply cord does not contact with hot part i e water piping High temperature may cause insulator of power supply cord damage hence electrical shock or fire 4 Do not touch the sharp aluminum fins or edges of metal parts If you are required to handle shar...

Page 5: ...an Speed rpm 510 Top Fan 550 Bottom Fan Fin material Aluminium Pre Coat Fin Type Corrugated Fin Row Stage FPI 2 51 18 Heat Exchanger Size W H L mm 881 5 1295 4 44 Item Unit Mono bloc Unit Height mm inch 1410 55 5 Width mm inch 1283 50 5 Dimension Depth mm inch 320 12 6 Net Weight kg lbs 153 337 dB A 50 Noise Level Power Level dB 67 ø Single V 230 Power Source Phase Voltage Cycle Hz 50 Input Power ...

Page 6: ...16 Water Drain Hose Inner Diameter mm inch 15 00 19 32 Motor Type Capacitor Run Induction Motor 5 μF No of Speed 3 Pump Input Power W 180 Type Brazed Plate No of Plates 60 Size W x H x L mm 100 x 93 x 325 Hot Water Coil Water Flow Rate l min m 3 h 34 4 2 1 Pressure Relief Valve Water Circuit kPa Open 300 Close 265 and below Flow Switch Magnetic Lead Switch Protection Device A Residual Current Circ...

Page 7: ...material Aluminium Pre Coat Fin Type Corrugated Fin Row Stage FPI 2 51 18 Heat Exchanger Size W H L mm 881 5 1295 4 44 Item Unit Mono bloc Unit Height mm inch 1410 55 5 Width mm inch 1283 50 5 Dimension Depth mm inch 320 12 6 Net Weight kg lbs 153 337 dB A 51 Noise Level Power Level dB 68 ø Single V 230 Power Source Phase Voltage Cycle Hz 50 Input Power kW 3 11 3 73 Maximum Input Power For Mono bl...

Page 8: ...m inch 15 00 19 32 Motor Type Capacitor Run Induction Motor 5 μF No of Speed 3 Pump Input Power W 180 Type Brazed Plate No of Plates 60 Size W x H x L mm 100 x 93 x 325 Hot Water Coil Water Flow Rate l min m 3 h 40 1 2 4 Pressure Relief Valve Water Circuit kPa Open 300 Close 265 and below Flow Switch Magnetic Lead Switch Protection Device A Residual Current Circuit Breaker 40 Volume I 10 Expansion...

Page 9: ...material Aluminium Pre Coat Fin Type Corrugated Fin Row Stage FPI 2 51 18 Heat Exchanger Size W H L mm 881 5 1295 4 44 Item Unit Mono bloc Unit Height mm inch 1410 55 5 Width mm inch 1283 50 5 Dimension Depth mm inch 320 12 6 Net Weight kg lbs 153 337 dB A 53 Noise Level Power Level dB 70 ø Single V 230 Power Source Phase Voltage Cycle Hz 50 Input Power kW 3 78 4 00 Maximum Input Power For Mono bl...

Page 10: ...mm inch 15 00 19 32 Motor Type Capacitor Run Induction Motor 5 μF No of Speed 3 Pump Input Power W 180 Type Brazed Plate No of Plates 60 Size W x H x L mm 100 x 93 x 325 Hot Water Coil Water Flow Rate l min m 3 h 45 9 2 8 Pressure Relief Valve Water Circuit kPa Open 300 Close 265 and below Flow Switch Magnetic Lead Switch Protection Device A Residual Current Circuit Breaker 40 Volume I 10 Expansio...

Page 11: ...reverse cycle Inner protector to protect compressor Serviceability Improvement Breakdown Self Diagnosis function System Status Check Buttons for servicing purpose System Service Mode Button for servicing purpose Front maintenance design for mono bloc unit Operation Condition Water outlet temperature C Ambient temperature C Maximum 55 35 HEATING Minimum 25 20 NOTICE When the outdoor temperature is ...

Page 12: ...12 4 Location of Controls and Components 4 1 Mono bloc Unit ...

Page 13: ...13 4 1 1 Main Components ...

Page 14: ...14 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 ...

Page 15: ...15 ...

Page 16: ...16 ...

Page 17: ...17 4 1 3 Weekly Timer Setting ...

Page 18: ...18 4 1 4 Setting Up The Special Functions ...

Page 19: ...19 5 Dimensions 5 1 Mono bloc Unit ...

Page 20: ...20 6 Refrigeration and Water Cycle Diagram ...

Page 21: ...21 ...

Page 22: ...22 7 Block Diagram ...

Page 23: ...23 8 Wiring Connection Diagram ...

Page 24: ...24 ...

Page 25: ...25 9 Electronic Circuit Diagram ...

Page 26: ...26 ...

Page 27: ...27 10 Printed Circuit Board 10 1 Water System 10 1 1 Main Printed Circuit Board ...

Page 28: ...28 10 1 2 Solar Printed Circuit Board Optional ...

Page 29: ...29 10 2 Refrigerant System 10 2 1 Main Printed Circuit Board ...

Page 30: ...30 10 2 2 Capacitor Printed Circuit Board 10 2 3 Noise Filter Printed Circuit Board ...

Page 31: ...31 11 Installation Instruction Mono Bloc Unit Dimension Diagram ...

Page 32: ...32 Main Components ...

Page 33: ...f the discharged air Avoid installing the Mono bloc unit at a location where suction side may be exposed directly to wind If Mono bloc unit installed near sea region with high content of sulphur or oily location e g machinery oil etc it lifespan maybe shorten When installing the product in a place where it will be affected by typhoon or strong wind such as wind blowing between buildings including ...

Page 34: ...cause the unit malfunction Choose proper sealer which can withstand the pressures and temperatures of the system Make sure to use two spanners to tighten the connection Tighten the nuts with torque wrench 117 6 N m If non brass metallic piping is used for installation make sure to insulate the piping to prevent galvanic corrosion Do not use pipes that are crushed or deformed If these inferior pipe...

Page 35: ... and power supply 2 cord 3 x 4 0 mm2 and power supply 3 cord 3 x 1 5 mm2 type designation 60245 IEC 57 or heavier cord to the RCCB and to the other end of the cord to isolating device Disconnecting means 2 To avoid the cable and cord being damaged by sharp edges the cable and cord must be passed through a bushing located at the right hand side of the mono bloc unit before being connected to the te...

Page 36: ...2 double insulation layer of PVC sheathed or polychloroprene sheathed cable note if such connection deemed NO necessary for tank OLP please connect jumper between terminal no 13 and 14 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 x min 0 3 mm2 double insulation layer with insulation strength of min 30V of PVC she...

Page 37: ...o ensure that the service current capacity at the interface point is sufficient for the installation of the equipment The equipment s power supply 2 complies with IEC EN 61000 3 12 The equipment s power supply 2 shall be connected to a suitable supply network with the following maximum permissible system impedance Zmax 0 236Ω at the interface Please liaise with supply authority to ensure that the ...

Page 38: ...e Control Unit To The Wall 1 Remove the remote control 1 lower case Insert a flat tipped screw driver or similar tool 2 to 3 mm into one of the gaps at the bottom of the case and twist to open Refer to the illustration at right Be careful not to damage the lower case 2 Do not remove the protective tape which is affixed to the upper case circuit board when removing the remote control lower case 3 S...

Page 39: ...nector CON1 in the upper case circuit board Refer to the illustration at below 7 Secure the remote control upper case to the lower case with the tabs provided 11 4 3 3 Connecting The Remote Control Cable To Mono Bloc Unit CAUTION Be sure to turn off the main power before installing and connecting the remote control Otherwise it will cause the electrical shock 1 Remove the cabinet front plate 2 Con...

Page 40: ...tlet Temperature Internal Water Setting Temperature 2 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 12 1 3 Tank Mode Operation Control contents 3 ways valve direction 3 ways valve switch and fix to tank side Heat pump Thermostat characteristic Water set temperature Tan...

Page 41: ...after DELAY TIMER 2 When tank temperature lower than HEATER ON TEMP 3 20 minutes from previous heater off Booster heater turn OFF condition 1 When tank temperature higher than tank set temperature for continuous 15 secs Solar 3 way valve Solar pump operates follow solar operation specification 2 way valve closes Others Indoor backup heater cannot be ON during tank mode only ...

Page 42: ...42 ...

Page 43: ...Room Thermo OFF AND Solar 3 ways valve OFF 2 Heat pump operation control o During External Room Thermo ON time When room thermo ON heat pump must operate to room side Heat pump operate follow normal operation at room side o During External Room Thermo OFF time Switch 3 ways valve to tank side IF Under Solar Priority Set condition o Tank temperature Tank THERMO ON TEMP AND Solar Valve OFF Under Sol...

Page 44: ... 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 o Next THERMO ON TEMP 1 THERMO ON TEMP Water inlet when heat pump THERMO OFF 3 C 2 If water outlet temperature THERMO ON TEMP AND External Room Thermo OFF heat pump ON Case 3 o Heat pump THERMO OFF TEMP 1 Water inlet temperature 55 C for contin...

Page 45: ...operation specification Under solar priority is set condition when solar 3WV turn ON booster heater will turn OFF and 3 ways valve switch to room side Under solar priority is not set condition solar 3WV will OFF when heat pump operate to tank side o 2 way valve opens ...

Page 46: ...temperature or 50 C whichever lower Heat pump Water Outlet set temperature is set to Maximum 55 C during tank interval Initial Tank THERMO ON TEMP heat pump tank target temperature 1 C Case 1 THERMO OFF TEMP 1 THERMO OFF TEMP Heat pump tank target temperature 1 C 2 Tank temperature THERMO OFF TEMP for continuous 10 seconds after heat pump off due to water thermo switch 3 ways valve to room side En...

Page 47: ...eat up interval Booster heater ON OFF according to booster heater operation control o During tank heat up interval Once switch from heating heat up interval to tank heat up interval turn off the booster heater and start counting the BOOSTER HEATER DELAY TIMER Booster heater turn ON after BOOSTER HEATER DELAY TIMER fulfill and tank temperature lower than tank set temperature BOOSTER HEATER DELAY TI...

Page 48: ...48 ...

Page 49: ...49 ...

Page 50: ...t pump provide heating capacity to room side by hot water through heating panel floor or fan coil 1 3 ways valve control o 3 ways valve switch and fix to heating side 2 Heat pump operate follow normal heating operation 3 Backup heater operate follow normal operation 4 Solar 3 way valve operates follow solar operation specification 5 2 way valve opens 12 1 6 Water Temperature Thermo Shift Setting S...

Page 51: ...er flow level is detected low continuously for 10 secs the water pump and compressor will be OFF permanently and OFF ON remote control LED will blink H62 error occurs When error happen the power has to be reset to clear the error If there is no error indication the water pump shall be continuously running The water pump will remain ON when compressor OFF due to thermostat OFF setting is reached 12...

Page 52: ...to room side 5 Press the ON OFF button to stop the unit 12 4 Flow Switch 12 4 1 Flow Switch Control 1 The water flow switch serve as an overload protector that shuts down the unit when the water level is detected to be low 2 Detection is Lo 0V when there is no water flow and detection is Hi 5V when there is water flow 12 5 Force Heater Mode Operation The backup heater also serves as backup in case...

Page 53: ...ode If the water inlet temperature exceeds 80 C for continuously 10 seconds the water pump will be OFF immediately 3 After water pump OFF for more than 10 minutes it will be ON back and the indoor unit safety control checking is restarted 12 7 Auto Restart Control When the power supply is cut off during the operation of Mono Bloc unit the compressor will re operate after power supply resumes 12 8 ...

Page 54: ...itch is Off OR d Heat pump thermo off or OFF condition 2 Force Heater Mode o Heater On Condition a After water pump operate 9 mins b When water outlet temperature water set temperature 8 C c 20 minutes since previous Backup heater Off o Heater Stop condition a Force mode off OR b When water outlet temperature water set temperature 2 C for continuous 15 secs Do not operate heater at the following s...

Page 55: ... heater will continue ON for 10 minutes after deice operation ends Base pan heater OFF condition o When outdoor ambient temperature 3 C OR o When operation is not heating OR o Base pan heater ON timer count completed 12 12 Three Way 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 1 3 ways valve swit...

Page 56: ...ration by reduces mono bloc unit noise Starting condition 1 When quiet button is presses 2 When quiet request ON time by weekly timer Refer to remote control When any of above mentioned condition is achieved this control is activated New target FM speed Present target FM speed 80 rpm Minimum target FM speed 200 rpm Cancellation condition 1 Cancel by press quiet button 2 Stop by OFF ON button 3 Whe...

Page 57: ... the Solar pump 3 Way Valve is requested ON Refer to figure below 12 16 2 Solar Operation Control When solar priority is SET 1 Operation condition a 3 way valve operates if all of the following conditions are fulfilled Power On regardless operation ON or OFF There is operation request from solar pump station Tank hot water temp is below solar on upper limit temp 72 C 2 Stop condition a 3 way valve...

Page 58: ...rating when No power supply to unit OR There is NO operation request from solar pump station OR Tank hot water temp is above solar off upper limit temp 80 C Heat pump thermo ON and operate to tank side during operation ON and tank mode selected ...

Page 59: ...59 ...

Page 60: ...t OFF Short Circuit ON Set Temp Actual Temp Short Circuit ON Open Circuit OFF Wire Connection and thermo characteristic of Siemen RAA20 Setting L Y1 H Heat Thermo L Y2 C Cool Thermo Set Temp Actual Temp Open Circuit OFF Short Circuit ON Set Temp Actual Temp Short Circuit ON Open Circuit OFF Control Content External room thermostat control activate only when remote thermostat connection select YES ...

Page 61: ...M temperature rises to 95 C compressor will stop immediately 2 Compressor will restart delay 3 minutes when the IPM temperature decreases to 90 C If this condition repeats continuously 3 times within 30 minutes system will stop operation and OFF ON remote control LED will blink F22 error occurs B DC Peak Current Control 1 When the current to IPM exceeds set value of 40 1 5 0 A MDF09C 44 7 5 0 A MD...

Page 62: ...etection conditions o When abnormal high voltage detection 5V or when open circuit detection 0V for 5 seconds continuously After detection o When abnormality is detected continue 5 seconds unit stop operation o OFF ON remote control LED will blink H64 error occurs 13 1 8 Outside Temperature Current Control 13 1 9 Extreme Low Temperature Control Purpose To improve the compressor reliability during ...

Page 63: ... 13 2 Protection Control for Heating Operation 13 2 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 2 2 Deice Operation When outdoor pipe temperature and outdoor air temperature is low deice operation start where outdoor fan motor stop 13 2 3 Heat exchanger hot water coil protecti...

Page 64: ...fter 10 15 minutes after 1 or 2 minutes in case very low ambient temperatures 10 C fully close 2 way valve 3 After 3 minutes fully close 3 way valve 4 Press the OFF ON switch on remote control to stop pump down operation 5 Remove the refrigerant piping 14 3 How To Adjust Water Flow Rate Before adjust the water flow rate make sure that the total water volume in the installation is 50 litres minimum...

Page 65: ...nd then contact your local authorized dealer o Reinstall the cover with tighten the mounting screws properly if the pressure relief valve is functioning normal 3 Air purge valve Air purge valve must be installed at all high points in a closed water circuit system An automatic air purge valve is provided inside the indoor unit To automatically purge the air from the system turn the plug on the air ...

Page 66: ...nal water filter field supply Clean the external water filter in regularly basic o External water filter is located inside the tube connector which is before water inlet connector of mono bloc unit indicated with WATER IN Refer to figure below o Use spanner to detach the tube connector nut o Take out the filter carefully so that not deforms it shape o Use tap water only to wash the residue on the ...

Page 67: ...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 68: ...ent during operation Water leakage or insufficient water flow rate in the system Excessive amount of refrigerant Inefficient compression Insufficient refrigerant gas leakage Mono bloc unit refrigerant system heat exchange deficiency Clogged expansion valve or Strainer Carry out the measurements of pressure electric current and temperature fifteen minutes after an operation is started ...

Page 69: ...IC memory To check the error code 1 When an abnormality occurs system will stop operation and OFF ON remote control LED will blink 2 Error code of the abnormality will display on the remote control Timer display LCD 3 To determine the abnormality description the Error Code Table needs to be referred To display past last error code 1 Turn ON power supply 2 Press and hold the CHECK button for more t...

Page 70: ...e overload protection Outdoor high pressure sensor Water pump or water leakage Clogged expansion valve or strainer Excess refrigerant Outdoor PCB H99 Indoor heat exchanger freeze prevention Indoor heat exchanger Refrigerant shortage F12 Pressure switch activate 4 times occurrence within 20 minutes Pressure switch F14 Outdoor compressor abnormal revolution 4 times occurrence within 20 minutes Outdo...

Page 71: ...e for 5 sec Water outlet temperature sensor defective or disconnected F46 Outdoor Current Transformer open circuit Insufficient refrigerant Outdoor PCB Compressor low F48 Outdoor EVA outlet temperature sensor abnormality Continue for 5 sec Outdoor EVA outlet temperature sensor defective or disconnected F49 Outdoor bypass outlet temperature sensor abnormality Continue for 5 sec Outdoor bypass outle...

Page 72: ...up operation of 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 Wrong indoor unit or outdoor unit PCB main used 3 Faulty indoor unit or outdoor unit PCB main Abnormality Judgment Continue for 90 seconds ...

Page 73: ...tions During startup and operation of 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 Faulty outdoor unit PCB main Abnormality Judgment Continue for 5 seconds ...

Page 74: ...itions During startup and operation of heating the temperatures detected by the indoor refrigerant liquid 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 75: ...ove 26 C is detected by the outdoor pipe temperature sensor Malfunction Caused 1 Dust accumulation on the outdoor unit heat exchanger 2 Air short circuit at outdoor unit 3 2 way valve partially closed 4 Faulty outdoor unit fan motor 5 Refrigerant shortage refrigerant leakage 6 Clogged expansion valve or strainer 7 Faulty outdoor pipe temperature sensor 8 Faulty outdoor unit main PCB main ...

Page 76: ...d 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 Faulty connector connection 4 Faulty water flow switch 5 Faulty indoor unit PCB main Abnormality Judgment Continue for 10 seconds but no judgment for 9 minutes after compressor startup restart ...

Page 77: ...ecision Conditions During operation of heating when the outdoor low 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 78: ...ecision Conditions During operation of 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 79: ...ndoor 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 Faulty indoor backup heater overload protector OLP 4 Faulty indoor unit PCB main Abnormality Judgment Continue for 60 seconds ...

Page 80: ...onditions 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 81: ...mmunication Abnormality H76 Malfunction Decision Conditions During standby and operation of heating indoor remote control error occur Malfunction Caused 1 Faulty connector connection 2 Faulty remote control 3 Faulty indoor unit PCB main ...

Page 82: ...al Malfunction Caused 1 Faulty outdoor unit PCB main 2 Faulty indoor unit PCB main 3 Indoor outdoor signal transmission error due to wrong wiring 4 Indoor outdoor signal transmission error due to breaking of wire in the connection wires between the indoor and outdoor units 5 Indoor outdoor signal transmission error due to disturbed power supply waveform Abnormality Judgment Continue for 1 minute a...

Page 83: ...on 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 84: ...tween 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 85: ...ssure 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 2 3 way closed 5 Clogged expansion valve or strainer 6 Excessive refrigerant 7 Faulty outdoor high pressure sensor 8 Faulty outdoor unit PCB main ...

Page 86: ...door refrigerant liquid temperature 0 C Malfunction Caused 1 Faulty water pump 2 Insufficient water flow rate in system 3 Water leak in system 4 2 way valve partially closed 5 Clogged expansion valve or strainer 6 Refrigerant shortage refrigerant leakage 7 Faulty indoor refrigerant liquid temperature sensor 8 Faulty indoor unit PCB main ...

Page 87: ...ion Caused 1 Dust accumulation on the outdoor unit heat exchanger 2 Air short circuit at outdoor unit 3 Faulty water pump 4 Insufficient water flow rate in system 5 Water leak in system 6 2 3 way valve closed 7 Clogged expansion valve or strainer 8 Excessive refrigerant 9 Faulty outdoor high pressure sensor and switch 10 Faulty outdoor unit PCB Abnormality Judgment Continue 4 times in 20 minutes ...

Page 88: ...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 89: ... fan motor feedback of rotation 2550rpm or 50rpm Malfunction Caused 1 Operation stop due to short circuit inside the fan motor winding 2 Operation stop due to breaking of wire inside the fan motor 3 Operation stop due to breaking of fan motor lead wires 4 Operation stop due to fan motor Hall IC malfunction 5 Operation error due to faulty outdoor unit PCB Abnormality Judgment Continue 2 times in 30...

Page 90: ...n Conditions During operation of 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 91: ... 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 Clogged expansion valve or strainer 5 Faulty outdoor unit PCB main 6 Faulty compressor Abnormality Judgment Continue 4 times in 30 minutes ...

Page 92: ...sion Conditions During operation of 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 93: ...ation of heating when outdoor DC current is above 40 1 5 0A for UD07 09CE OR 44 7 5 0A for UD12 16CE is detected by the IPM DC Peak sensing circuitry in the outdoor unit PCB main Malfunction Caused 1 Faulty outdoor unit PCB main 2 Faulty compressor Abnormality Judgment Continue for 7 times ...

Page 94: ...uring operation of heating indoor refrigerant liquid temperature water inlet temperature 5 C Malfunction Caused 1 Faulty water inlet or indoor refrigerant liquid temperature sensors 2 2 3 way valve closed 3 Refrigerant shortage refrigerant leakage 4 Clogged expansion valve or strainer 5 Faulty outdoor unit PCB main 6 Poor compression of compressor Abnormality Judgment Continue 2 times in 20 minute...

Page 95: ...During heating operation when the indoor pipe temperature of thermostat ON indoor unit 0 C Malfunction Caused 1 Faulty sensor 2 Faulty connector connection 3 Faulty outdoor unit PCB noise filter main 4 Faulty four way valve Abnormality Judgment Continue 4 times in 30 minutes ...

Page 96: ...l 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 97: ...itions During startup and operation of 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 Faulty outdoor unit PCB main Abnormality Judgment Continue for 5 seconds ...

Page 98: ...itions During startup and operation of heating the temperatures detected by the indoor water inlet 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 99: ...itions During startup and operation of heating the temperatures detected by the outdoor discharge pipe temperature sensor are used to determine sensor error Malfunction Caused 1 Faulty connector connection 2 Faulty sensor 3 Faulty outdoor unit PCB main Abnormality Judgment Continue for 5 seconds ...

Page 100: ...s During operation of 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 Faulty outdoor unit PCB main Abnormality Judgment Continue 4 times in 10 minutes ...

Page 101: ...itions During startup and operation of 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 Faulty outdoor unit PCB main Abnormality Judgment Continue for 5 seconds ...

Page 102: ...itions During startup and operation of 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 Faulty outdoor unit PCB main Abnormality Judgment Continue for 5 seconds ...

Page 103: ...itions During startup and operation of heating the temperatures detected by the indoor water outlet temperature sensor are used to determine sensor errors Malfunction Caused 1 Faulty connector connection 2 Faulty sensor 3 Faulty indoor unit PCB main Abnormality Judgment Continue for 5 seconds ...

Page 104: ...rmer 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 CT defective 2 Faulty outdoor unit PCB 3 Compressor defective low compression Abnormality Judgment Continue 3 times in 20 seconds ...

Page 105: ... 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 2 way valve closed 4 Faulty outdoor unit fan motor 5 Clogged expansion valve or strainer 6 Excessive refrigerant 7 Faulty outdoor high pressure sensor 8 Faulty outdoor unit PCB main ...

Page 106: ...he capacitor Ensure that the capacitor has discharged sufficiently before proceeding with repair work Failure to heed this caution may result in electric shocks Be sure to switch off all the power supply before performing each of the below action 17 1 To Remove The Cabinet Front Plate 17 2 To Remove The Cabinet Top Plate ...

Page 107: ...107 17 3 To Remove The Cabinet Rear Plate 17 4 To Remove Pressure Gauge 17 5 To Remove RCCB ...

Page 108: ...108 17 6 To Remove Transformer and Electronic Controller Board 17 7 To Remove Pressure Relief Valve and Air Purge Valve When reinstall the water pipe use grease or water at the joining ...

Page 109: ...tall the water pipe use grease or water at the joining 17 9 To Remove Water Pump When reinstall the water pipe use grease or water at the joining 17 10 To Remove Bottle Complete When reinstall the water pipe use grease or water at the joining ...

Page 110: ...teristics 18 1 1 WH MDF12C6E5 WH MDF12C6E5 1 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 7m ...

Page 111: ...C6E5 WH MDF14C6E5 1 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 7m ...

Page 112: ...C6E5 WH MDF16C6E5 1 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 7m ...

Page 113: ...Input Power Capacity Input Power 15 9900 3910 9500 4050 9000 4190 8600 4330 7900 4450 7300 4560 7 11100 3730 10700 4000 10200 4200 9800 4400 9100 4570 8500 4740 2 12900 3510 12400 3730 11900 3950 11400 4170 10400 4290 9500 4400 7 14000 2600 14000 3110 14000 3630 14000 4140 13600 4610 13300 5080 25 14000 1750 14000 2100 14000 2450 14000 2800 14000 3050 14000 3440 18 2 3 WH MDF16C6E5 WH MDF16C6E5 1 ...

Page 114: ...114 19 Exploded View and Replacement Parts List 19 1 WH MDF12C6E5 WH MDF14C6E5 WH MDF16C6E5 WH MDF12C6E5 1 WH MDF14C6E5 1 WH MDF16C6E5 1 Refrigerant System ...

Page 115: ...115 ...

Page 116: ...116 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 117: ...6 27 SENSOR COMP TOP 1 CWA50C2629 27a SENSOR COMP DEF 1 CWA50C2577 28 CABINET REAR PLATE 1 CWE02K1019A 29 CONTROL BOARD CASING 1 CWH10K1049 31 TERMINAL BOARD ASS Y 1 CWA28K1213 36 ELECTRONIC CONTROLLER CAPACITOR 1 CWA746169 O 38 ELECTRONIC CONTROLLER NOISE FILTER 1 CWA745446 O 44 ELECTRONIC CONTROLLER MAIN 1 CWA73C4882R CWA73C4884R CWA73C4886R O 46 REACTOR 2 G0C592J00005 48 TERMINAL COVER 1 CWH171...

Page 118: ...4C6E5 1 WH MDF16C6E5 WH MDF16C6E5 1 REMARKS 75 ACCESSORY CO DRAIN ELBOW 1 CWG87C2030 79 CRANKCASE HEATER BASE PAN 1 CWA341071 81 SOUND PROOF MATERIAL 1 CWG302599 Note All parts are supplied from PAPAMY Malaysia Vendor Code 00029488 O marked parts are recommended to be kept in stock ...

Page 119: ...119 19 2 WH MDF12C6E5 WH MDF14C6E5 WH MDF16C6E5 WH MDF12C6E5 1 WH MDF14C6E5 1 WH MDF16C6E5 1 Water System ...

Page 120: ...120 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 121: ...ARD ASS Y 1 CWA28K1222 29 RESIDUAL CURRENT CIRCUIT BREAKER 2 3 CWA181005 O 30 TRANSFORMER COMPLETE 1 CWA40C1096 O 31 SENSOR COMPLETE 1 CWA50C2749 O 32 REMOTE CONTROL COMPLETE 1 CWA75C4024 O 33 PRESSURE GAUGE 1 CWB070001 O 34 PRESSURE RELIEF VALVE 1 CWB621092 O 35 PRESSURE RELIEF VALVE 1 CWB621094 36 TERMINAL BOARD ASS Y 1 CWA28K1232 38 OPERATING INSTRUCTION 1 CWF568650 39 OPERATING INSTRUCTION 1 C...

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