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Panasonic WH-MDC05F3E5 Service Manual

Summary of WH-MDC05F3E5

  • Page 1

    © panasonic corporation 2013. Order no. Papamy1311029ce mono bloc unit wh-mdc05f3e5 destination europe precaution of low temperature in order to avoid frostbite, be assured of no refrigerant leakage during the installation or repairing of refrigerant circuit. Warning this service information is desi...

  • Page 2: Table of Contents

    2 table of contents page page 1. Safety precautions .............................................3 2. Specifications .....................................................5 2.1 wh-mdc05f3e5 ...........................................5 3. Features..........................................................

  • Page 3: 1. Safety Precautions

    3 caution warning warning 1. Safety precautions read the following “safety precautions” carefully before perform any servicing. Electrical work and water installation work must be installed or serviced by a licensed electrician and licensed water system installer respectively. Be sure to use the cor...

  • Page 4

    4 caution 19. 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. 20. The unit is only for use in a closed water system. Utilization in an...

  • Page 5: 2. Specifications

    5 2. Specifications 2.1 wh-mdc05f3e5 item unit refrigerant system performance test condition en 14511 condition (ambient/water) a35w7 - kw 4.50 - btu/h 15300 - cooling capacity kcal/h 3870 - w/w 3.33 - eer kcal/hw 2.87 - condition (ambient/water) a7w35 a2w35 kw 5.00 4.80 btu/h 17100 16400 heating ca...

  • Page 6

    6 item unit mono bloc unit power supply 1: phase (ø) / max. Current (a) / max. Input power (w) single / 19.5 / 4.26k power supply 2: phase (ø) / max. Current (a) / max. Input power (w) single / 13.0 / 3.00k power supply 3: phase (ø) / max. Current (a) / max. Input power (w) - / - / - starting curren...

  • Page 7: 3. Features

    7 3. Features inverter technology - energy saving high efficiency compact design environment protection - non-ozone depletion substances refrigerant (r410a) easy to use control panel - auto mode - holiday mode - dry concrete function - weekly timer setting a-class energy efficiency pump - water pump...

  • Page 8

    8 4. Location of controls and components 4.1 mono bloc unit top plate air inlet (rear) air inlet (side) air outlet cabinet front plate handle (2 pieces front and 2 pieces behind).

  • Page 9

    9 4.1.1 main components component name pcb pressure relief valve flow switch pressure gauge water pump rccb cable cover cabinet front plate connector name water inlet water outlet cabinet top plate overload protector heater assembly expansion vessel cover air purge valve plug (view without cover) de...

  • Page 10

    10 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. Operation actual heater booster quiet setting status service auto heat cool tank heater force °c °c on off mon tue wed thu fri sat sun hr hr kwh off/on button thi...

  • Page 11

    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. • after initial installation, you may manually adjust the settings. Th...

  • Page 12

    12 10 booster heater to activate or deactivate the water tank’s booster heater. Note: if no is selected, menu 11 is skipped. Yes no no no b 11 booster heater delay timer to delay time for the booster heater to activate while the system is heating up the water tank. 20 minutes ~ 1 hour 35 minutes • d...

  • Page 13

    13 4.1.4 how to use user enjoy quiet operation press . • this operation reduces the noise of mono bloc unit. The operation may cause heating/ * 1 cooling ability to decrease. User system status check mode 1 s s e r p . (the display shows status.) 2 s s e r p or to check the selected mode. • dry conc...

  • Page 14

    14 dealer operation/settings to be done only by the authorised dealer/specialist. User operation/settings to be done by the authorised dealer/specialist or user. Dealer system temperature setting temperature setting display the system controls the temperature for each menu based on the outdoor ambie...

  • Page 15

    15 user shifting the water temperature desired temperature setting this easily shifts the water outlet temperature if the setting is undesirable. 1 s s e r p to enter the water temperature shifting mode. 2 s s e r p to change setting. 3 s s e r p or to set the desired temperature. (temperature range...

  • Page 16

    16 user weekly timer setting promotes energy saving by allowing you to set up to 6 programmes in any given day. Indicates the next timer operation programme day to be selected indicates the next timer operation day programme number in a day off timer on timer lights up if timer operation is selected...

  • Page 17

    17 dry concrete function • during construction to dry the concrete under a preset temperature. 1 s s e r p and simultaneously and hold for 5 seconds until the display shows “ ”. 2 s s e r p . (the display shows “ ”). 3 s s e r p to select day. Press or to set the desired temperature. 4 s s e r p to ...

  • Page 18: 5. Dimensions

    18 5. Dimensions 5.1 mono bloc unit unit: mm (579) 152 980 1283 303 319 266 94 86 5 48 0 70 17 2 (1 0) (1 0) (20) 152 40 0 35 5 32 0 (10).

  • Page 19

    19 6. Refrigeration and water cycle diagram mono bloc unit pipe temp. Sensor pipe temp. Sensor hex water outlet temp. Sensor pipe temp. Sensor pipe temp. Sensor air temp. Sensor backup heater outdoor side expansion vessel pressure relief valve water flow switch water pump water inlet (connect to san...

  • Page 20

    20 to water inlet mono bloc unit from water outlet mono bloc unit connect to mono bloc unit main electronic controller (water system) remote control room thermo (optional) fan coil unit (heating / cooling) panel heater unit (heating) floor heating panel (heating) cold water supply connect to mono bl...

  • Page 21: 7. Block Diagram

    21 7. Block diagram (w a t er system) (re frig erant system) el cb l n el c b l1 n1 po w e r s u pp ly 1 3- phas e ac 400 v 50h z po w e r s u pp ly 2 1- phas e ac 230 v 50h z fu se1 r y -v 201 so la r 3- w a y s va lv e so l a r m 1~ m 1~ m 1~ ms 3 ~ ry -v 3 3- w a y s va lv e ry -v 2 2- w a y s va...

  • Page 22

    22 8. Wiring connection diagram rccb po w er su pp ly 1 si ng le phas e ac 230v 50h z 230v 4 0a l ∆ n= 30 m a gr ound in g (wat er syste m ) (l ) (n) bl w sw 1 sw 2 re ac to r sur g e pro tecti on ci rcui t surg e pro tec ti on ci rc ui t no is e fi lter ci rcui t no is e fi lt er ci rcui t no ise f...

  • Page 23

    23 (ref ri g eran t syst em ) rem arks: w : w hi te r : re d b : b lu e p : pi nk bl : bl ac k y : yel lo w br : b ro w n o : or an ge g : g re en gr : g ra y y/ g : yell o w /gr ee n to wat er sys tem 1 2 3 te rm in al bo ar d cn -a cl (b la ck ) cn -b lk (b la ck ) ac -b lk (b la ck ) ac -b lk 01 ...

  • Page 24

    24 9. Electronic circuit diagram rc cb po w er su ppl y 1 si ngl e p has e ac 230v 50h z 230v 40a l ∆ n= 30m a gr ou ndi ng (wat er sys tem ) (l ) (n) bl w sw 1 sw 2 reac to r sur g e pro te ct ion ci rcui t surge protecti on ci rcui t noi se fi lt er ci rcui t nois e fi lt er ci rcui t no ise fi lt...

  • Page 25

    25 (r ef ri g er an t syst em ) to wat er system 1 2 3 te rm in al bo ar d cn -a cl (b la ck ) cn -b lk (b la ck ) ac -b lk (b la ck ) ac -b lk 01 (b la ck ) ac -l (g ra y) dc p (r ed ) dc n2 (b la ck ) cn -f m 1 (w hi te ) fg 1 (g re en ) dc n- ou t (b la ck ) ac -c (b lu e) dc n- in (b la ck ) dc ...

  • Page 26: 10.  Printed Circuit Board

    26 10. Printed circuit board 10.1 water system 10.1.1 main printed circuit board cn-th1 cn-solar cn-flow cn-thermo g05 ac1-l3 g02 g02 data g04 cn-t1 cn-olp1 cn-th2 cn-th3 cn-olp2 cn-remote2 cn-pump2 g08 cn-rcv2 cn-v3 cn-pwr cn-v2 cn-ht g01 ac1-n g07.

  • Page 27

    27 10.1.2 solar printed circuit board (optional).

  • Page 28

    28 10.2 refrigerant system 10.2.1 main printed circuit board cn-fm1 ac-l cn-th1 cn-ev com3 ac-wht02 ac-blk02 cn-ht1 cn-ht2 cn-hot cn-hps cn-dis cn-tank cn-psw1.

  • Page 29

    29 10.2.2 capacitor printed circuit board dcn-in dcn-out dcp-in dcp-out 10.2.3 noise filter printed circuit board cn-acl cn-acn.

  • Page 30: Mono Bloc Unit

    30 11. Installation instruction mono bloc unit dimension diagram optional cord / cable :- • 2-way valve cable (3 × min 0.5mm 2 ) *cooling model only • 3-way valve cable (3 × min 0.5mm 2 ) • booster heater cord (3 × min 1.5mm 2 ) • room thermostat cable (4 or 3 × min 0.5mm 2 ) • tank olp cable (2 × m...

  • Page 31

    31 main components component name pcb pressure relief valve flow switch pressure gauge water pump rccb cable cover cabinet front plate connector name water inlet water outlet cabinet top plate overload protector heater assembly expansion vessel cover air purge valve plug (view without cover) detail ...

  • Page 32

    32 11.1 select the best location install mono bloc unit at outdoor only. Avoid location where ambient temperature is below -20°c. The mono bloc unit must be installed on a flat, solid surface. A place removed from any heat source or steam which may effect the operation of the mono bloc unit. A place...

  • Page 33

    33 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 licens...

  • Page 34

    34 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. Wat...

  • Page 35

    35 how to guide cable / cord to bushing bind all power supply cords to the u- shaped tube (cover with foam) with band strap ( fi eld supply) bind all power supply cords to the tube with band strap ( fi eld supply). Make sure these cords do not touch any portion of pump body mounting screws reinstall...

  • Page 36

    36 terminals on the mono bloc unit 1 2 3 4 5 6 three-way valve cable two-way valve cable solar pump station cable external controller cable 7 8 9 10 11 12 13 14 15 16 17 18 booster heater cord room thermostat cable tank olp cable solar three- way valve cable tank sensor cable lead wire cord clo s e ...

  • Page 37

    37 11.4.3.1 selecting the installation location upper case lower case remote control 30mm or more 30mm or more 30mm or more 120mm or more remote control lower case allow sufficient space around the remote control (1) as shown in the illustration above. Install in a place which is away from direct su...

  • Page 38

    38 6 insert firmly the connector of remote control cable (2) to connector (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. Left feeding- out position lower case top feeding-out position remot...

  • Page 39: 12.  Operation and Control

    39 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 mai...

  • Page 40

    40 heat mode operation time chart on off on off 3 ways valve mode on heatpump thermo off heatpump thermo on on off id w ater pump backup heater on off backup heater startup timer heater on heater off heater off heater on timer for backup heater to on back from previous off w ater outlet temp 45 o c ...

  • Page 41

    41 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 th...

  • Page 42

    42 12.1.4 auto mode operation outdoor ambient cool to heat setting temp. Cool mode heat mode heat to cool setting temp. Control details: o 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 43

    43 12.1.5 tank mode operation control contents: 3 ways valve direction o 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. Heat pump thermostat characteristic o water set tempe...

  • Page 44

    44 57°c 57°c 57°c 57°c.

  • Page 45

    45.

  • Page 46

    46 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 ...

  • Page 47

    47 characteristic of heat pump thermo on/off under tank side condition water outlet thermo condition o 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 48

    48 heat + tank mode (heating priority set) under solar priority set condition: under solar priority not set condition:.

  • Page 49

    49 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: o 3 ways valve switch to room side during heating heat-up interval, and switch to tank side during tank heat-up interval. Both modes will switch alternativel...

  • Page 50

    50 characteristic of heat pump thermo on/off under tank side condition water outlet thermo condition o 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 51

    51.

  • Page 52

    52.

  • Page 53

    53 57°c 57°c 50°c 50°c.

  • Page 54

    54 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. Heat pump operation control:- during...

  • Page 55

    55 characteristic of heat pump thermo on/off under tank side condition a) water outlet thermo condition o 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:...

  • Page 56

    56 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. Heat pump operation...

  • Page 57

    57 water inlet thermo condition o heat pump thermo off temp: 1) water inlet temperature > [55°c] for continuous 60 seconds, heat pump off. O thermo on temp: 1) thermo on temp = water inlet temperature > [55°c]. C) solar operation condition (only under solar priority set condition) when solar pump on...

  • Page 58

    58 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 outdoo...

  • Page 59

    59 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. If “set” switch pressed for less than 5se...

  • Page 60

    60 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 res...

  • Page 61

    61 12.2.2 a-class pump specification + power for drive dc280-373v - + power for control dc15±10% control signal dc0v-dc6v feedback speed (puls signal) 4puls/rotation - pump 66 4 5 3 1 2 vdd gnd vcc fg vsp control signal is analog voltage (dc0v-6v) generated by microcomputer pwm port. Microcomputer c...

  • Page 62

    62 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: current pump speed current pump speed > 6000rpm for 10 seco...

  • Page 63

    63 12.5 indoor unit safety 12.5.1 indoor unit safety control 1 when water pump is on, the system will start checking flow switch status (on/off). 2 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...

  • Page 64

    64 12.8 indoor back-up heater control 12.8.1 indoor electric heater control 1 normal heating mode o 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 e. When water outlet temperature [-8 ° c] f. [20] ...

  • Page 65

    65 12.9 tank booster heater control 12.9.1 tank booster heater control heating operation condition: tank set temperature + [-5°c] tank set temperature + [+2°c] heater off heater on 1 booster heater turn on condition: o after booster heater delay timer fulfill during heatpump startup time in tank mod...

  • Page 66

    66 12.11 sterilization mode purpose: o to sterilize water tank by setting the required boiling temperature. Control start condition: o tank connection menu is set to yes by control panel. O sterilization menu is set to yes by control panel. O sterilization signal received from control panel by timer...

  • Page 67

    67 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: o outdoor ambient temp. Expansion tank anti free...

  • Page 68

    68 12.14 solar operation (optional) 12.14.1 solar operation: 1 external solar heat source signal can be connect to unit for proper control of heat source switching during tank boiling time. 2 control according to preset whether solar priority is set or not. 3 when tank connection is not set at setti...

  • Page 69

    69 solar operation chart in different mode and condition tank mode (solar priority set condition) tank mode (solar priority not set condition).

  • Page 70

    70 heat + tank mode (heating priority not set) (solar priority set condition) tank side 3 way valve room side heatpump on off t1 t2 t2 t3 booster heater solar request solar 3 way valve on off on off on off when solar 3 way valve turn on during tank interval, cancel tank interval immediately and swit...

  • Page 71

    71 heat + tank mode (heating priority set) & cool + tank mode 3 way valve heatpump on off booster heater solar request solar 3 way valve on off on off on off room side on off on off booster heater thermo off booster heater off due to solar 3 way valve on solar priority set solar priority not set sol...

  • Page 72

    72 12.15 external room thermostat control (optional) purpose: 1 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 ro...

  • Page 73

    73 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: 1 3 ways valve switch off: o during 3 ways valve switch off time, the hot water will provide heat capacity to heating side. 2 3...

  • Page 74

    74 12.18 external off/on control communication circuit between indoor unit and external controller is as per below. External controller panasonic pcb cn-thermo 5v 12v 1 2 mico maximum length of communication cable is 20 meter. Control content: external control switch control panel off/on control pan...

  • Page 75

    75 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: o range of days can be set in holiday mode is from 1 to 999 days. O after days of holiday have been ...

  • Page 76: 13. Protection

    76 13. Protection control 13.1 protection control for all operations 13.1.1 time delay safety control 1 the compressor will not start for three minutes after stop of operation. 13.1.2 30 seconds forced operation 1 once the compressor starts operation, it will not stop its operation for 30 seconds. 2...

  • Page 77

    77 13.1.6 low pressure protection control purpose: o to protect the system operation. Detection period: o after compressor on for 5 minutes. Detection conditions: o when detection of tem above 30°c. O calculation of average evaporation temperature (tem). O use outdoor low pressure sensor. O tem use ...

  • Page 78

    78 13.1.10 crank case heater control purpose: - for compressor protection during low outdoor ambient operation (during heating low temperature operation). Control content: a. Trigger heater start condition o when the outdoor air temperature is 4°c or below, and discharge temperature is 12°c or below...

  • Page 79

    79 13.3 protection control for cooling operation 13.3.1 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. Compressor frequency will ...

  • Page 80: 14. Servicing

    80 14. Servicing mode 14.1 test run 1 fill up the tank unit with water. For details refer to tank unit installation instruction and operation instruction. 2 antifreeze agent must be added into water circuit to prevent freezing of water when outdoor ambient temperatures is low. Recommended antifreeze...

  • Page 81: 15. Maintenance

    81 15. Maintenance guide in order to ensure optimal performance of the unit, checks and inspections on the unit and the field wiring must be carried out regularly. Please request a licensed technician for carry out maintenance job. Before carried out any maintenance or repair work, and removing the ...

  • Page 82

    82 6 external 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 con...

  • Page 83

    83 10 maintenance o 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. Warning do not add or replace other than r410a type. It...

  • Page 84: 16. Troubleshooting

    84 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 f...

  • Page 85

    85 16.2 relationship between the condition of the air-to-water heatpump indoor and outdoor units and pressure and electric current heating mode cooling mode condition of the air-to-water heatpump indoor and outdoor units low pressure high pressure electric current during operation low pressure high ...

  • Page 86

    86 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 control panel led will blink and error code will display on the control panel timer display lcd. Even error co...

  • Page 87

    87 16.4 error codes table diagnosis display abnormality/protection control abnormality judgement primary location to verify h00 no abnormality detected — — h12 indoor/outdoor capacity unmatched 90s after power supply indoor/outdoor connection wire indoor/outdoor pcb specification and combination tab...

  • Page 88

    88 diagnosis display abnormality/protection control abnormality judgement primary location to verify f36 outdoor air temperature sensor abnormality continue for 5 sec. Outdoor air temperature sensor (defective or disconnected) f37 indoor water inlet temperature sensor abnormality continue for 5 sec....

  • Page 89

    89 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 ...

  • Page 90

    90 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 connecti...

  • Page 91

    91 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 92

    92 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: 6 fault...

  • Page 93

    93 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 [b] present high pressure - high pressure at compressor startup 2 **judgment only for firs...

  • Page 94

    94 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 th...

  • Page 95

    95 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 faulty connector c...

  • Page 96

    96 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 0 vdc or 5 vdc. Malfunction caused: 1 faulty connector connection. 2 faulty sensor. 3 faulty outdoor unit pcb (main). Abn...

  • Page 97

    97 16.5.9 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 faulty ...

  • Page 98

    98 16.5.10 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 un...

  • Page 99

    99 16.5.11 indoor-control panel communication abnormality (h76) malfunction decision conditions: during standby and operation of cooling and heating, indoor-control panel error occur. Malfunction caused: 1 faulty connector connection. 2 faulty control panel. 3 faulty indoor unit pcb (main)..

  • Page 100

    100 16.5.12 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 ind...

  • Page 101

    101 16.5.13 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...

  • Page 102

    102 16.5.14 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 103

    103 16.5.15 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 2...

  • Page 104

    104 16.5.16 indoor freeze-up protection (h99) malfunction decision conditions: during anti-freezing control in cooling operation, when the indoor refrigerant liquid temperature malfunction caused: 1 faulty water pump. 2 insufficient water flow rate in system. 3 water leak in system. 4 2 way valve pa...

  • Page 105

    105 16.5.17 outdoor high pressure switch activate (f12) malfunction decision conditions: during operation of cooling and heating, when pressure 4.5 mpa and above is detected by outdoor high pressure switch. Malfunction caused: 1 dust accumulation on the outdoor unit heat exchanger. 2 air short circu...

  • Page 106

    106 16.5.18 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 faul...

  • Page 107

    107 16.5.19 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 > 2550 rpm or malfunction caused: 1 operation stop due...

  • Page 108

    108 16.5.20 input over current detection (f16) malfunction decision conditions: during operation of cooling and heating, when outdoor current above 15.5 a (heating) and 7.7 a (cooling) is detected by the current transformer (ct) in the outdoor unit pcb. Malfunction caused: 1 excessive refrigerant. 2...

  • Page 109

    109 16.5.21 compressor overheating (f20) malfunction decision conditions: during operation of cooling and heating, when temperature above 112°c is detected by the compressor tank temperature sensor. Malfunction caused: 1 faulty compressor tank temperature sensor. 2 2/3 way valve closed. 3 refrigeran...

  • Page 110

    110 16.5.22 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...

  • Page 111

    111 16.5.23 output over current detection (f23) malfunction decision conditions: during operation of cooling and heating, when outdoor dc current is above 39.0 ± 5.0 a is detected by the ipm dc peak sensing circuitry in the outdoor unit pcb (main). Malfunction caused: 1 faulty outdoor unit pcb (main...

  • Page 112

    112 16.5.24 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: 0.65 a 3 during operation of cooling, water inlet temperature - indoor refrigerant ...

  • Page 113

    113 16.5.25 four way valve abnormality (f25) malfunction decision conditions: 1 during heating operation, when the indoor pipe temperature of thermostat on indoor unit 2 during cooling operation, when the indoor pipe temperature of thermostat on indoor unit > 45°c. Malfunction caused: 1 faulty senso...

  • Page 114

    114 16.5.26 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...

  • Page 115

    115 16.5.27 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 ...

  • Page 116

    116 16.5.28 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 ...

  • Page 117

    117 16.5.29 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 co...

  • Page 118

    118 16.5.30 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 winding...

  • Page 119

    119 16.5.31 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. ...

  • Page 120

    120 16.5.32 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 connec...

  • Page 121

    121 16.5.33 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 connect...

  • Page 122

    122 16.5.34 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 ( malfunction caused: 1 ct defective. 2 faulty outdoor unit ...

  • Page 123

    123 16.5.35 cooling high pressure overload protection (f95) malfunction decision conditions: during operation of cooling, when pressure 4.0 mpa 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 ou...

  • Page 124

    124 warning warning 17. Disassembly and assembly instructions 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. Be sure to swi...

  • Page 125

    125 17.3 to remove the cabinet rear plate 4. Slide the cabinet rear plate downward to release the pawls. Then pull it out to remove it. 2. Remove 5 mounting screws. 3. Remove 6 mounting screws. 1. Remove 2 mounting screws. 17.4 to remove pressure gauge pressure gauge 1. Remove 4 screws. 2. Use spann...

  • Page 126

    126 17.5 to remove rccb 1. Disconnect 2 lead wires (black and white) rccb 3. Remove screws to remove rccb. 2. Disconnect 2 lead wires (black and white) 17.6 to remove transformer transformer 1. Disconnect 2 lead wire t1, t2 (black) from the electronic controller board. 2. Disconnect connector cn-t1 ...

  • Page 127

    127 17.7 to remove water system electronic controller board 4. Remove screw to remove electronic controller board. 2. Remove earth wires g01, g02, g05, g07 and g08. 1. Disconnect all lead wires of ac1-l3 (black), ac1-n (white), data (red), ht1-l3 (red),ac2-l3 (black), ac2-n2 (white), acl3 (black), a...

  • Page 128

    128 17.8 to remove refrigerant side control board complete cn-fm1 ac-l cn-th1 cn-ev com3 ac-wht02 ac-blk02 cn-ht1 cn-ht2 cn-hot cn-hps cn-dis cn-tank cn-psw1 cn-acl cn-acn 2. Remove earth wire fg1 and fg2 (green). 3. Disconnect all the connectors from the electronic control board. 4. Remove 4 screws...

  • Page 129

    129 17.9 to remove pressure relief valve and air purge valve air purge valve make sure plug is fully close in clockwise direction. Apply some water based grease on packing surface before fix with shut off valve. During reinstall air purge valve. Packing pressure relief valve 1. Turn the air purge va...

  • Page 130

    130 17.11 to remove water pump 3. Remove 2 retaining ring, then pull out the water pump. 1. Disconnect cn-pump2 connector from electronic controller board. 2. Loosen the nut. When reinstall the water pipe, use grease or water at the joining..

  • Page 131: 18. Technical

    131 18. Technical data 18.1 operation characteristics 18.1.1 wh-mdc05f3e5 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 outdoor temperature (°c) outdoo...

  • Page 132

    132 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 outdoor temperature (°c) c a pac ity (kw ) outdoor temperature (°c) inpu t p o w e r( kw ) 0.000 1.00...

  • Page 133

    133 cooling characteristics at different outdoor air temperature condition outdoor air temperature : 35°c (dbt), -°c (wbt) indoor water inlet temperature : 19°c indoor water outlet temperature : 14°c outdoor temperature (°c) c a pac ity (kw ) outdoor temperature (°c) inpu t p o w e r( kw ) 0.000 1.0...

  • Page 134

    134 cooling characteristics at different outdoor air temperature condition outdoor air temperature : 35°c (dbt), -°c (wbt) indoor water inlet temperature : 23°c indoor water outlet temperature : 18°c outdoor temperature (°c) c a pac ity (kw ) outdoor temperature (°c) inpu t p o w e r( kw ) 0.000 1.0...

  • Page 135

    135 18.2 heating capacity table water out (°c) 30 35 40 45 50 55 outdoor air (°c) capacity (w) input power (w) capacity (w) input power (w) capacity (w) input power (w) capacity (w) input power (w) capacity (w) input power (w) capacity (w) input power (w) -15 5000 1820 5000 1950 5000 2200 5000 2450 ...

  • Page 136

    136 19. Exploded view and replacement parts list 19.1 wh-mdc05f3e5 (refrigerant system) 46 61 50a 56 55 54a 57 58 59 67 67 66 53 50 1 60 28 22.

  • Page 137

    137 21 26 23 11 9 7 20 5 1 6 24 68 25 70 73 13 12 10 4 4 27 2 3 4a 4a 8 62 75 49 48.

  • Page 138

    138 29 44 36 31 72 38 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 139

    139 model: refrigerant system > safety ref. No. Description & name qty. Wh-mdc05f3e5 remark 1 base pan ass’y 1 cwd52k1282 2 compressor 1 5kd240xaa21 o 3 bushing - compressor mount 3 cwh50055 4 nut - compressor mount 3 cwh561049 4a gasket for terminal cover 3 cwb811017 5 crankcase heater 1 cwa341043 ...

  • Page 140

    140 19.2 wh-mdc05f3e5 (water system) 18a 3 45 44 46 2 4 33 19 16 5 17 1 47 45 48 18 49 50 34 9 43 42.

  • Page 141

    141 i/i o/i 40 39 24 20 31 30 27 21 25 26 29 o/i 38 54 55 56 52 51 52 53 53 32 32a 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 142

    142 safety ref. No. Description & name qty. Wh-mdc05f3e5 remark 1 base pan ass’y 1 cwd52k1360 2 hot water coil - complete 1 cwb90c1067 o 3 receiver 1 cwb141066 4 flow switch 1 cwb621034 5 air purge valve 1 cwb621094 o 9 pump 1 cwb532116 16 bottle comp. 1 cwh90c0035 17 heater ass'y 1 cwa34k1026 18 so...