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8.0 Troubleshooting

8.1 Safety caution

WARNING

Be sure to turn off all power supplies or disconnect all wires to avoid electric shock.
While checking indoor/outdoor PCB, please equip yourself with antistatic gloves or wrist
strap to avoid damage to the board.

WARNING

Electricity remains in capacitors even when the power supply is off. Ensure the capaci-
tors are fully discharged before troubleshooting.

Test the voltage between P and N on back of the main PCB with multimeter. If the voltage is 36V, the
capacitors are fully discharged.

Note: This picture is for reference only. Actual appearance may vary.

8.2 General troubleshooting

8.2.1 Error Display (Indoor Unit)

When the Indoor Unit encounters a recognized error, the Operation Lamp will flash in a corresponding
series, the Timer Lamp may turn ON or begin flashing, and an error code will be displayed. These error
codes are described in the following table:

Operation Lamp

Timer Lamp

Display Error information

1 time

OFF

E0

Indoor unit EEPROM parameter error.

2 times

OFF

E1

Indoor / outdoor unit communication error.

3 times

OFF

E2

Zero-crossing signal detection error (for some models).

4 times

OFF

E3

The indoor fan speed is operating outside of the normal range.

5 times

OFF

E4

Indoor room temperature sensor T1 is in open circuit or has short circuit.

6 times

OFF

E5

Evaporator coil temperature sensor T2 is in open circuit or has short circuit.

9 times

OFF

E7

Indoor PCB / Display board communication error (for some models).

7 times

OFF

EC

Refrigerant leak detected.

1 time

ON

F0

Current overload protection.

2 times

ON

F1

Outdoor temperature sensor T4 is in open circuit or has short circuit.

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Содержание HCNI 533

Страница 1: ...MARK HEAT PUMP SPLIT UNIT 0662680 Technical manual EN...

Страница 2: ...2...

Страница 3: ...dhere to all precautionary measures listed in this section may result in personal injury damage to the unit or to property or in extreme cases death WARNING indicates a potentially hazardous situation...

Страница 4: ...exposed to battery damage or bat tery leakage CAUTION Clean and ventilate the unit at regular intervals when operating it near a stove or near simi lar devices Do not use the unit during severe weathe...

Страница 5: ...or in an environment directly exposing it to sea wind or salt spray Do not install the unit on a defective or damaged installation stand or in an unsecu re location Ensure the unit is installed at a l...

Страница 6: ...k taking place the area around the equipment is to be surveyed to make sure that there are no flammable hazards or ignition risks NO SMOKING signs shall be displayed Ventilated area Ensure that the ar...

Страница 7: ...e that apparatus is mounted securely Ensure that seals or sealing materials have not degraded such that they no longer serve the purpose of preventing the ingress of flammable atmospheres Replacement...

Страница 8: ...nders The system shall be flushed with OFN to render the unit safe This process may need to be repeated several times Compressed air or oxygen shall not be used for this task Flushing shall be achieve...

Страница 9: ...ing that it has been de commissioned and emptied of refrigerant The label shall be dated and signed Ensure that there are labels on the equipment stating the equipment contains flammable refrigerant R...

Страница 10: ...automatically regulates the temperature and moisture in the room This function allows the operating speed of the outdoor unit s compres sor and indoor unit s motor fan to be reduced to their minimum s...

Страница 11: ...5 x 1 5 mm2 5 x 1 5 mm2 Refrigerant circuit Refrigerant GWP R32 675 R32 675 Diameter of refrigerant piping on liquid gas mm inches 6 35 1 4 9 52 3 8 6 35 1 4 12 74 1 2 Max splitting length m 25 30 Ma...

Страница 12: ...unit If indoor unit is installed higher than outdoor unit oil trap should be set every 10m of vertical distance If the outdoor unit is installed higher than the indoor unit proper oil should return t...

Страница 13: ...t To Outdoor Unit White Red Blue Black Yellow Yellow Green Applicable for Multi and Mono Unit without 1W standby control feature OPTIONAL OPTIONAL Applicable to AC motor only Indoor Fan OPTIONAL Magne...

Страница 14: ...Yellow Green OPTIONAL Power supply 1 Ph 220 240V AC 50 60Hz Yellow Green CN60 Blue CN17 Red CN15 White OPTIONAL OPTIONAL OPTIONAL 4 Way Crankcase heater Pan heater CN25 Yellow Green CN31 CN7 CN21 OPTI...

Страница 15: ...Unit T1 Indoor Room Temperature T2 Coil Temperature of Indoor Heat Exchanger 4 WAY Gas Valve Assembly 4 WAY VALVE AC FAN Alternating Current AC FAN DC FAN Direct Current DC FAN CT1 AC Current Detecto...

Страница 16: ...16 3 4 Outdoor Units Printed Circuit Board Diagram HCNMX 353 HCNI 533...

Страница 17: ...compressor heater 208 230V AC when is ON 4 4 WAY CN60 Connect to 4 way valve 208 230V AC when it is ON 5 HEAT2 CN15 Connect to chassis heater 208 230V AC when it is ON 6 AC FAN CN25 Connect to AC fan...

Страница 18: ...ble on selected units only Heating in room temperature under 8 C set temperature gradually illuminates to in 1 second intervals ECO function available on selected units only Note Please select the dis...

Страница 19: ...When more than one temperature sensor is malfunctioning the air conditioner ceases operation Refrigerant leakage detection This function is active only when cooling mode is selected It will detect if...

Страница 20: ...TE1 TEL0 13 TE1 TEL0 18 TE1 TEL0 16 TE1 TEL0 14 TE1 TEL0 12 TE1 TEL0 10 TE1 The auto fan acts as below rules Outdoor Fan Control The outdoor unit will be run at different fan speed according to T4 an...

Страница 21: ...perature T1 reaches the setting temperature the compressor will stop the indoor fan motor runs at the minimum speed or setting speed The anti cold air function is valid The indoor fan is controlled as...

Страница 22: ...ating In auto mode cooling only models run the fan Indoor fan will run at auto fan speed The louver operates same as in relevant mode If the machine switches mode between heating and cooling the compr...

Страница 23: ...nutes after power returns If the unit was in forced cooling mode it will run in this mode for 30 minutes and turn to auto mode with temperature set to 24 C If there is a power failure while the unit i...

Страница 24: ...lower level than F2 The indoor unit will run at faint breeze which reduces noise to the lowest possible level When indoor unit is matched with multi outdoor unit this function is disabled 5 0 Maintena...

Страница 25: ...und meter indicates 0 1 MPa 14 5 Psi If the meter does not indicate 0 1 MPa 14 5 Psi after 30 minutes continue evacuating for an additional 20 minutes If the pressure does not achieve 0 1 MPa 14 5 Psi...

Страница 26: ...o purge the air in the charge hose then fully tighten the charge hose with push pin Handle Lo to the service port of 3 way valve 6 Place the charging cylinder onto an electronic scale and record the s...

Страница 27: ...s gas service port 3 Open the Handle Lo manifold valve to purge air from the charge hose for 5 seconds and then close it quickly 4 Close the 2 way valve 5 Operate the air conditioner in cooling mode...

Страница 28: ...nd meter indicates 0 1 MPa 14 5 Psi If the meter does not indicate 0 1 MPa 14 5 Psi after 30 minutes continue evacuating for an additional 20 minutes If the pressure does not achieve 0 1 MPa 14 5 Psi...

Страница 29: ...system for approximately 1 hour Confirm that the compound meter indicates 0 1 MPa 14 5Psi 4 Close the valve Low side on the charge set and turn off the vacuum pump 5 Wait for 5 minutes then check whet...

Страница 30: ...g cylinder onto an electronic scale and record the starting weight 7 Fully open the Handle Lo manifold valve 2 way and 3 way valves 8 Operate the air conditioner in cooling mode to charge the system w...

Страница 31: ...2 Disassembling the indoor unit 6 2 1Front Panel Procedure Illustration 1 Hold the front panel by the tabs on the both sides and lift it Front Panel Tab 2 Push up the bottom of an air filter and then...

Страница 32: ...al louver lightly by both hands to loosen the hooks then remove the horizontal louver Hook 5 Remove 1 screw and then re move the electrical cover 6 Disconnect the connector for the display board 7 Rem...

Страница 33: ...2 and then remove the screws 9 Release the 4 hooks 10 Release the seven hooks in the back Hooks 11 Pull out the panel frame while pushing the hook through a cle arance between the panel frame and the...

Страница 34: ...cover of electro nic box and the terminal cover Fixing Screw Electronic Cover 2 Pull out the room temperature sensor T1 and the coil tempera ture sensor T2 T1 Sensor Ground Screws T2 Sensor 3 Remove t...

Страница 35: ...move the electronic main board Indoor Fan Motor Applicable to AC Motor Only Swing Motor Display Board Pipe Temperature Sensor Room Temperature Sensor 7 Remove the fixing screw then remove the capacito...

Страница 36: ...or Procedure Illustration 1 Disassemble the pipe holder located at the rear of the unit Pipe Holder 2 Remove the screws on the evaporator located at the fixed plate Screws 3 Remove the two screws on t...

Страница 37: ...crews and remove the fixing board of the fan motor Screws 2 Remove the Bearing sleeve 3 Remove the fixing screw Fixing Screw 4 Pull out the fan motor and fan assembly from the side 6 2 5 Step motor No...

Страница 38: ...00 333 554 12 0 815 514 70 85 5 60 365 311 62 340 20 61 6 106 7 2 Disassembling the outdoor unit 7 2 1Panel Plate Model 353 Procedure Illustration 1 Turn off the air conditioner and the power breaker...

Страница 39: ...located underneath the big handle Top Cover 4 Remove the screws of the front panel and then remove the front panel 6 screws Front Panel 5 Remove the screws of water collecting cover 2 screws Water Col...

Страница 40: ...Procedure Illustration 1 Turn off the air conditioner and the power breaker Big Handle 2 Remove the screws of the big handle and then remove the big handle 1 screws 3 Remove the screws of the top cove...

Страница 41: ...Remove the screws of water collecting cover and then remove the water collecting cover 2 screws Water Collecting Cover 6 Remove the screws of the rear net and then remove the rear net 2 screws for som...

Страница 42: ...trol box cover 4 hooks 3 Disconnect the connector for fan motor from the electronic con trol board Compressor T3 T4 TP Electronic Expansion Valve 4 Way Valve DC Fan AC Fan 4 Remove the connector for t...

Страница 43: ...r Note Remove the panel plate and the connection of fan motor on PCB before disassembling fan motor Procedure Illustration 1 Remove the fixing screws of the fan motor 4 screws 2 Remove the fan motor 7...

Страница 44: ...Illustration 1 Heat up the brazed parts and then detach the the four way valve and the pipe 2 Remove the four way valve as sembly with pliers 7 2 6 Compressor WARNING Evacuate the system and confirm...

Страница 45: ...hex nuts and was hers securing the compressor located on the bottom plate 4 Heat up the brazed parts and then remove the discharge pipe and the suction pipe Discharge Pipe Suction Pipe 5 Lift the com...

Страница 46: ...Operation Lamp will flash in a corresponding series the Timer Lamp may turn ON or begin flashing and an error code will be displayed These error codes are described in the following table Operation L...

Страница 47: ...lay Error information 1 time OFF EH 00 Indoor unit EEPROM parameter error 2 times OFF EL 01 Indoor outdoor unit communication error 3 times OFF EH 02 Zero crossing signal detection error for some mode...

Страница 48: ...in C regardless of remote used 3 T1 T2 T3 T4 and T2B display ranges from 25 C to 70 C TP display ranges from 20 C to 130 C 4 The frequency display ranges from 0 to 159Hz 5 If the actual values exceed...

Страница 49: ...WARNING Be sure to turn off unit before any maintenance to prevent damage or injury 8 4 1 Remote maintenance SUGGESTION When troubles occur please check the following points with customers before fiel...

Страница 50: ...uncon Frosng and defrosng frequently Unit will not start The power switch is on but fans will not start The temperature on the display board cannot be set Unit is on but the wind is not cold hot Unit...

Страница 51: ...nit is noisy Test method remedy Check heat load Tighten bolts or screws Close all the windows and doors Remove the obstacles Reconnect the power or press ON OFF buon on remote control to restart opera...

Страница 52: ...will not start Condenser Outdoor fan will not start Unit runs but shortly stops Compressor short cycles due to overload High discharge pressure Low discharge pressure High sucon pressure Low sucon pr...

Страница 53: ...installaon of feeler bulb Heavy load condion Loosen hold down bolts and or screws Shipping plates remain aached Poor choices of capacity Contact of piping with other piping or external plate Replace t...

Страница 54: ...sor x x x x x x x x P Additional refrigerant x x x x x x x P x Part requiring replacement Error code F1 F2 F3 F4 F5 P0 P1 P2 P6 P4 EC 53 EC 52 EC 54 EC 51 EC 07 PC 00 PC 01 PC 02 PC 03 PC 04 Indoor PC...

Страница 55: ...EEPROM is a read only memory whose contents can be erased and reprogrammed using a pulsed voltage The location of the EEPROM chip on the indoor and outdoor PCB is shown in the following two images 6...

Страница 56: ...s Measure the DC voltage between N L2 and S Black pin to N L2 Red pin to S For units without W wire Replace indoor PCB Check the wiring connection from indoor terminal to indoor PCB are they good Turn...

Страница 57: ...est the resistance of the reactor which does not connect with capacitor e normal value should be around 0 Otherwise the reactor must have malfunction e The picture and the value are only for reference...

Страница 58: ...R32 Refrigerant AC 6 Troubleshooting 6 20 NO YES 6 7 3 E2 EH 02 Zero crossing detection error diagnosis and solution Description When PCB does not receive zero crossing signal feedback for 4 minutes o...

Страница 59: ...5 EC 07 Fan speed is operating outside of the normal range diagnosis and solution Description When the indoor outdoor fan speed keeps too low or too high for a certain time the LED displays the failur...

Страница 60: ...s and needs to be replaced DC motor voltage input and output voltage 220 240V AC 2 Outdoor DC Fan Motor control chip is in outdoor PCB Release the UVW connector Measure the resistance of U V U W V W I...

Страница 61: ...must have problems and needs to be replaced Wall Type Active Line R32 Refrigerant AC 6 Troubleshooting 6 23 3 Indoor AC Fan Motor Power on and set the unit running in fan mode at high fan speed After...

Страница 62: ...within acceptable parameters Replace indoor PCB E4 EH 60 E5 EH 61 or outdoor PCB F1 EC 53 F2 EC 52 F3 EC 54 Note For certain models outdoor PCB could not be removed separately In this case the outdoor...

Страница 63: ...g and repair YES NO NO YES 6 7 6 E7 EH 0b Indoor PCB Display board communication error diagnosis and solution Description Indoor PCB does not receive feedback from the display board Recommended parts...

Страница 64: ...ion diagnosis and solution Description Define the evaporator coil temp T2 of the compressor when it just starts running as Tcool In the beginning 8 minutes after the compressor starts up if T2 Tcool 1...

Страница 65: ...nt protection diagnosis and solution Description An abnormal current rise is detected by checking the specified current detection circuit Recommended parts to check or to prepare Outdoor PCB Connectio...

Страница 66: ...nction or IGBT over strong current protection diagnosis and solution Description When the voltage signal which the IPM sends to the compressor drive chip is abnormal the LED displays the failure code...

Страница 67: ...ltage are detected by checking the specified voltage detection circuit Recommended parts to prepare Power supply wires IPM module board Outdoor PCB Reactor Check the power supply Is it in working orde...

Страница 68: ...uld be replaced as a whole Wall Type Active Line R32 Refrigerant AC 6 Troubleshooting 6 30 leshooting and repair NO YES P2 PC 02 temperature protection of IPM module or High pressure protection diagno...

Страница 69: ...NO Method Disconnect the plug Measure the resistance of the high pressure protector if the protector is normal the value is 0 Does a problem still exist Is the outdoor ambient tempera ture higher tha...

Страница 70: ...mal inverter compressor drive is detected by a special detection circuit including communi cation signal detection voltage detection compressor rotation speed signal detection and so on Recommended pa...

Страница 71: ...ow pressure pro tector and main control board Is the low pressure protector broken NO NO Method Disconnect the plug Measure the resistance of the low pressure protector if the protector is normal the...

Страница 72: ...re the resistance value of the sensor using a multi meter 3 Check corresponding temperature sensor resistance value table refer to Chapter 7 Note The picture and the value are only for reference actua...

Страница 73: ...are only for reference actual condition and specific value may vary 6 36 KSK89D53UEZ 2 35 Terminals Blue Black Terminals Red Black Note The picture and the value are only for reference actual conditi...

Страница 74: ...outdoor unit and disconnect power supply 2 Discharge electrolytic capacitors and ensure all energy storage unit has been discharged 3 Disassemble outdoor PCB or disassemble IPM board 4 Measure the res...

Страница 75: ...3 4 38L 4 YKFG 15 4 28 1 YKFG 20 4 10L YKFG 20 4 5 11 Brand Welling Welling Welling Welling Black Red Main 345 75 269 388 Blue Black AUX 348 150 224 360 Fan Motor Model YKFG 20 4 5 19 YKFG 25 4 6 14 Y...

Страница 76: ...44 36 97 6 13059 76 169 1 34105 116 241 0 4006 3 27 41 5878 37 99 5 87359 77 171 1 29078 117 243 0 38991 2 28 39 8239 38 100 5 62961 78 172 1 25423 118 244 0 37956 1 30 37 1988 39 102 5 39689 79 174 1...

Страница 77: ...4 115 239 2 422 4 25 222 8 36 97 34 32 76 169 7 82 116 241 2 357 3 27 211 4 37 99 32 94 77 171 7 566 117 243 2 294 2 28 200 7 38 100 31 62 78 172 7 321 118 244 2 233 1 30 190 5 39 102 30 36 79 174 7 0...

Страница 78: ...50 157 Psi 99 101 117 128 126 122 129 135 158 165 Psi 105 106 125 141 138 132 135 143 165 176 Psi Temp C Outdoor DB Indoor DB WB 21 11 15 23 89 17 22 26 67 19 44 32 22 22 78 114 115 142 155 152 141 14...

Страница 79: ...369 318 296 3 09 2 91 2 58 2 33 2 12 1 89 1 68 3 32 3 06 2 71 2 59 2 38 2 09 1 94 Temp C Outdoor DB WB Indoor DB 12 78 18 33 23 89 3 45 3 21 2 84 2 68 2 54 2 19 2 04 0 0 5 1 1 5 2 2 5 3 3 5 4 Temp C O...

Страница 80: ...173 106 111 850 8 5 123 25 1 393 34 507 2600 26 377 41 977 107 559 900 9 130 5 3 209 37 777 2650 26 5 384 25 42 769 108 984 950 9 5 137 75 4 951 40 911 2700 27 391 5 43 55 110 39 1000 10 145 6 624 43...

Страница 81: ...81 EN...

Страница 82: ...82...

Страница 83: ...83 EN...

Страница 84: ...belgium be MARK DEUTSCHLAND GmbH MAX PLANCK STRASSE 16 46446 EMMERICH AM RHEIN DEUTSCHLAND TELEFON 49 0 2822 97728 0 TELEFAX 49 0 2822 97728 10 info mark de www mark de MARK POLSKA Sp z o o UL JASNOG...

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