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TGM MRFOT12DS, Service Manual

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TGM MRFOT12DS Service Manual Download Page 62

Tr

oubleshooting

Page 60 

5.3  E1 (Indoor and outdoor unit communication error)

(only for 

MWFOT24S

)

Description

: The indoor unit has not received feedback from the outdoor unit for 120 seconds.

Recommended parts to prepare:

• Indoor PCB
• Outdoor PCB
• Reactor

Troubleshooting and repair:

Power off, then restart the unit after 2 minutes.

Does a problem remain?

The unit is operating normally

NO

Measure Vs. (Vs is the voltage between S and N of 

outdoor unit. Red pan-S, Black pan-N)

YES

    Is the voltage moving 

alternately between Positive and 

negative?

 Check the outdoor wiring connection.

Is it normal?

NO

Replace the outdoor PCB.

Power on.

Is the error 

resolved?

Replace  the indoor  PCB.

NO

Check the indoor wiring 

connections

Is it normal?

Replace the indoor PCB.

Power on.

YES

Is the error resolved?

Replace  the outdoor  PCB.

NO

The voltage moves alternately with 

positive value.

NO

The voltage is a 

certain value

NO

Summary of Contents for MRFOT12DS

Page 1: ...FIXED SPEED SERIES 50 HERTZ 2017 SERVICE MANUAL ...

Page 2: ... Wiring Diagrams 3 Product Features 9 1 Operation Modes and Functions 4 Maintenance and Disassembly 13 1 Maintenance 2 Disassembly 5 Troubleshooting 48 1 Safety Caution 2 General Troubleshooting 3 Error Diagnosis and Troubleshooting Without Error Code 4 Quick Maintenance by Error Code 5 Troubleshooting by Error Code Appendix 67 i Temperature Sensor Resistance Value Table for T1 T2 T3 and T4 C K ...

Page 3: ...Contents 1 In Case of Accidents or Emergency 2 2 Pre Installation 2 3 Operation and Maintenance 2 Safety Precautions ...

Page 4: ...rm electri cal work For more information contact your dealer seller or an authorized TGM service center CAUTION While unpacking be careful of sharp edges around the unit as well as the edges of the fins on the con denser and evaporator 3 Operation and Maintenance WARNING Do not use defective or under rated circuit breakers Ensure the unit is properly grounded and that a dedicated circuit and break...

Page 5: ...Contents 1 Model Reference 4 2 Electrical Wiring Diagrams 5 2 1 Indoor Unit 5 2 2 Outdoor Unit 7 Specifications ...

Page 6: ...llowing table to determine the specific indoor and outdoor unit model number of your purchased equipment Indoor Unit Model Outdoor Unit Model Capacity Btu Power Supply MWFOT12S MRFOT12DS 12k MWFOT18S MRFOT18DS 18k 220 240V 50Hz 1Phase MWFOT24S MRFOT24DS 24k ...

Page 7: ...ector to CCM Comm Bus Central Controller for CAC X Y E 485 Communication Line L LIVE N NEUTRAL Heater The Electric Heating Belt of Indoor Unit T1 Indoor Room Temperature T2 Coil Temperature of Indoor Heat Exchanger Middle T3 Coil Temperature of Condenser T4 Outdoor Ambient Temperature TH Compressor Suction Temperature EEV Electirc Expansive Valve T2B Coil Temperature of Indoor Heat Exchanger Outle...

Page 8: ...t is optional the actual shape shall prevail 2 OPTIONAL CN701 SWITCH BOARD 2 OPTIONAL CAP 16022000025311 OPTIONAL MWFOT24S INDOOR WIRING DIAGRAM M P1 P2 M M 5 3 or 2 2 ION OPTIONAL Y G HEATER OPTIONAL OPTIONAL X Y E 12V 5V HA HB To CCM Comm Bus or 485 Wire controller To Randomly Connected Wire controller To Remote Switch To Remote Alarm CN701 SWITCH BOARD 2 4 3 3 Applicable to AC motor only OPTION...

Page 9: ... Current Detector COMP Compressor L PRO Low Pressure Switch H PRO High Pressure Switch MRFOT12DS MRFOT18DS 1 N O TE 1 The w i r i ng di agr am i s f or expl anat i on pur pose onl y The act ual shape of t he com ponent s m ay be di f f er ent 2 Sym bol 1 i ndi cat es com pr essor i nt er nal or ext er nal com ponent s 3 i ndi cat es opt i onal com ponent s COMP 1 ...

Page 10: ...Specifications Page 8 MRFOT24DS S 1 3 2 4 A1 A2 2 Symbol 1 indicates compressor internal or external components 3 Y G ...

Page 11: ... Digital Display 10 1 4 Fan Mode 11 1 5 Cooling Mode 11 1 6 Auto mode 11 1 7 Drying Mode 11 1 8 Forced Operation Function 11 1 9 Auto Restart Function 11 1 10 Refrigerant Leakage Detection 12 1 11 Self Clean Optional 12 1 12 Follow Me Optional 12 1 13 Information Inquiry 12 Product Features ...

Page 12: ...door unit Current protection The current exceeds setting value for certain time the compressor and outdoor fan will shut off Indoor fan delayed operation When the unit starts the louver is automatically activated and the indoor fan will operate after a period of 4 seconds If the unit is in heating mode the indoor fan is regulated by the anti cold wind function Sensor redundancy and automatic shuto...

Page 13: ... T 2 Cooling 3 T 2 Fan only T 3 Heating Heating In auto mode cooling only models run the fan AC will run in auto mode in the below cases Pressing the forced auto button If AC is off it will run in auto mode when the timer on function is active After setting the mode AC will run in auto mode if the compressor keeps not running for certain time 1 7 Drying mode The compressor is cycled running with 1...

Page 14: ...no beeps The unit automatically sets the temperature according to the measurements from the remote control The unit will only change modes if the information from the remote control makes it necessary not from the unit s temperature setting If the unit does not receive a signal for 7 minutes or you press Follow Me the function turns off The unit regulates temperature based on its own sensor and se...

Page 15: ...nce 14 1 1 First Time Installation Check 14 1 2 Refrigerant Recharge 16 1 3 Re Installation 17 1 3 1 Indoor Unit 17 1 3 2 Outdoor Unit 19 2 Disassembly 21 2 1 Indoor Unit 21 2 2 Outdoor Unit 33 Maintenance and Disassembly ...

Page 16: ...revent air and moisture from affecting the air conditioner s performance the indoor unit as well as the pipes between the indoor and outdoor unit must be be leak tested and evacuated Leak test soap water method Use a soft brush to apply soapy water or a neutral liquid detergent onto the indoor unit connections and outdoor unit connections If there is gas leakage bubbles will form on the connection...

Page 17: ...ndicate 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 after 50 minutes check for leakage If the pressure successfully reaches 0 1 MPa 14 5 Psi fully close the Handle Lo valve and cease vacuum pump operations b Wait for 5 minutes then check whether the gauge needle moves after turning off the vacuum pump 6 Loosen...

Page 18: ...to the valve at the bottom of the cylinder 3 If the refrigerant is R410A invert the cylinder to ensure a complete liquid charge 4 Open the valve at the bottom of the cylinder and close the check valve on the charge set to purge the air 5 Place the charging cylinder onto an electronic scale and record the starting weight 6 Operate the air conditioner in cooling mode 7 Open the valves Low side on th...

Page 19: ...harge hose with the push pin of Handle Lo to the 3 way valve s gas service port 4 Open the Handle Lo valve of the manifold valve to purge air from the charge hose for 5 seconds and then close it quickly 5 Close the 2 way valve 6 Operate the air conditioner in cooling mode Cease operations when the gauge reaches 0 1 MPa 14 5 Psi 7 Close the 3 way valve so that the gauge rests between 0 3 MPa 43 5 P...

Page 20: ...system for 30 minutes a Check whether the compound 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 after 50 minutes check for leakage If the pressure successfully reaches 0 1 MPa 14 5 Psi fully close the Handle Lo valve and cease vacuum pump operation...

Page 21: ...3 way valves are opened 2 Connect the vacuum pump to the 3 way valve s service port 3 Evacuate the system for approximately one 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 a period of five minutes then check whether the gauge needle moves after turning off the vacuum pump 6 Disconnect the charge hos...

Page 22: ... and record the starting weight 6 Operate the air conditioner in cooling mode 7 Open the valves Low side on the charge set and charge the system with liquid refrigerant 8 When the electronic scale displays the correct weight refer to the gauge and the pressure of the low side to confirm disconnect the charge hose from the 3 way valve s service port immediately and turn off the air conditioner befo...

Page 23: ... Illustration 1 Hold the front panel by the tabs on the both sides and lift it see CJ_ AF_001 2 Push up the bottom of an air filter and then pull it out downwards see CJ_AF_002 CJ_AF_001 CJ_AF_002 Note This section is for reference only Actual unit appearance may vary Front Panel Tab Filter ...

Page 24: ...d push the hook towards left to open it see CJ_AF_003 4 Bend the horizontal louver lightly by both hands to loosen the hooks then remove the horizontal louver see CJ_AF_004 CJ_AF_003 CJ_AF_004 Note This section is for reference only Actual unit appearance may vary Hook Horizontal Louver Hook ...

Page 25: ...ve the electrical cover see CJ_AF_005 1 and CJ_AF_005 2 6 Disconnect the connector for display board see CJ_AF_005 3 7 Remove the display board see CJ_ AF_005 4 CJ_AF_005 Note This section is for reference only Actual unit appearance may vary CJ_AF_005 1 CJ_AF_005 2 CJ_AF_005 3 CJ_AF_005 4 ...

Page 26: ...llustration 8 Open the screw caps 2 and the remove the screws see CJ_AF_006 9 Release the 4 hooks 10 Release the seven hooks in the back see CJ_AF_007 CJ_AF_006 CJ_AF_007 Note This section is for reference only Actual unit appearance may vary Hooks ...

Page 27: ...dure Illustration 11 Pull out the panel frame while pushing the hook through a clearance between the panel frame and the heat exchanger see CJ_AF_008 CJ_AF_008 Note This section is for reference only Actual unit appearance may vary Panel Frame ...

Page 28: ...nd then remove the cover of electronic box and the terminal cover see CJ_AF_009 2 Pull out the room temperature sensor T1 and the coil temperature sensor T2 see CJ_AF_010 3 Remove the two screws used for the ground connection see CJ_AF_010 CJ_AF_009 CJ_AF_010 Note This section is for reference only Actual unit appearance may vary T1 Sensor Ground Screws T2 Sensor Fixing Screw Electronic Cover ...

Page 29: ...in right image to remove it see CJ_AF_011 2 6 Disconnect the wires Then remove the electronic main board see CJ_ AF_012 CJ_AF_011 2 CJ_AF_012 Note This section is for reference only Actual unit appearance may vary Fixing Screw Electronic Box Indoor Fan Motor Applicable to AC Motor Only Swing Motor Display Board Pipe Temperature Sensor Room Temperature Sensor CJ_AF_011 1 ...

Page 30: ...sembly Page 28 Procedure Illustration 7 Remove the fixing screw then remove the capacitor of fan motor see CJ_ AF_013 CJ_AF_013 Note This section is for reference only Actual unit appearance may vary Capacitor of Fan Motor ...

Page 31: ...lustration 1 Disassemble the pipe holder located at the rear of the unit see CJ_AF_014 2 Remove the screws on the evaporator located at the fixed plate see CJ_AF_015 3 Remove the two screws on the evaporator located at the base of the bearing side see CJ_AF_016 CJ_AF_014 CJ_AF_015 CJ_AF_016 Note This section is for reference only Actual unit appearance may vary Pipe Holder Screws Screws ...

Page 32: ...Maintenance and Disassembly Page 30 Procedure Illustration 4 Pull out the evaporator see CJ_AF_017 CJ_AF_017 Note This section is for reference only Actual unit appearance may vary Evaporator ...

Page 33: ...ing fan motor and fan Procedure Illustration 1 Remove the two screws and remove the fixing board of the fan motor see CJ_ AF_018 2 Remove the Bearing sleeve see CJ_ AF_019 3 Remove the fixing screw see Fig CJ_ AF_020 4 Pull out the fan motor and fan assembly from the side CJ_AF_018 CJ_AF_019 CJ_AF_020 Note This section is for reference only Actual unit appearance may vary Fixing Screw Screws ...

Page 34: ...d electrical parts refer to 1 Front panel 2 Electrical parts before disassembling step motor Procedure Illustration 1 Remove the two screws then remove the stepping motor see CJ_AF_021 CJ_AF_021 Note This section is for reference only Actual unit appearance may vary Stepping Motor ...

Page 35: ...er 2 Remove the screws of the big handle and then remove the big handle 1 screws see CJ_BA30_001 3 Remove the screws of the top cover and then remove the top cover 3 screws One of the screws is located underneath the big handle see CJ_ BA30_002 CJ_BA30_001 CJ_BA30_002 Note This section is for reference only Actual unit appearance may vary Big Handle Top Cover ...

Page 36: ...s of the front panel and then remove the front panel 7 screws see CJ_BA30_003 5 Remove the screws of water collecting cover 1 screw see CJ_BA30_004 CJ_BA30_003 CJ_BA30_004 Note This section is for reference only Actual unit appearance may vary Front Panel Water Collecting Cover ...

Page 37: ...ews of the rear net and then remove the rear net 2 screws see CJ_BA30_005 7 Remove the screws of the right panel and then remove the right panel 5 screws see CJ_BA30_006 CJ_BA30_005 CJ_BA30_006 Note This section is for reference only Actual unit appearance may vary Right Panel ...

Page 38: ...ws of the big handle and then remove the big handle 1 screws see CJ_CA30_001 3 Remove the screws of the top cover and then remove the top cover 3 screws One of the screws is located underneath the big handle see CJ_ CA30_002 CJ_CA30_001 CJ_CA30_002 Note This section is for reference only Actual unit appearance may vary Big Handle Top Cover ...

Page 39: ...nd then remove the front panel 6 screws see CJ_CA30_003 5 Remove the screws of water collecting cover and then remove the water collecting cover 1 screw see CJ_ CA30_004 CJ_CA30_003 CJ_CA30_004 Note This section is for reference only Actual unit appearance may vary Front Panel Water Collecting Cover ...

Page 40: ...bly Page 38 Procedure Illustration 6 Remove the screws of the right panel and then remove the right panel 6 screws see CJ_CA30_005 CJ_CA30_005 Note This section is for reference only Actual unit appearance may vary Right Panel ...

Page 41: ...ing the fan with a spanner see CJ_ODU_001 2 Remove the fan 3 Disconnect the connectors for fan motor Blue wire yellow wire red wire brown wire and black wire The blue wire and red wire are on the capacitor The black wire connects with terminal 4 see CJ_ODU_002 CJ_ODU_001 CJ_ODU_002 Note This section is for reference only Actual unit appearance may vary D cut Connectors for fan motor Terminal 1 to ...

Page 42: ...ssembly Page 40 Procedure Illustration 4 Remove the fixing screws of the fan motor 4 screws see CJ_ODU_003 5 Remove the fan motor CJ_ODU_003 Note This section is for reference only Actual unit appearance may vary Fan Motor ...

Page 43: ...fan 3 Disconnect the connectors for fan motor Blue wire red wire brown wire and black wire The blue wire and brown wire are on the capacitor The black wire connects with a terminal And the red wire is on the borad see CJ_ODU_005 CJ_ODU_004 CJ_ODU_005 Note This section is for reference only Actual unit appearance may vary D cut Fan Motor Fan Motor ...

Page 44: ...ssembly Page 42 Procedure Illustration 4 Remove the fixing screws of the fan motor 4 screws see CJ_ODU_006 5 Remove the fan motor CJ_ODU_006 Note This section is for reference only Actual unit appearance may vary Fan Motor ...

Page 45: ...e connects with terminal 1 blue wire and red wire connect with the compressor capacitor see CJ_ODU_007 3 Disconnect the wires connected to 4 way valve Blue wires on terminal 2 3 see CJ_ODU_007 4 Remove the electrical parts see CJ_ ODU_007 5 Remove the fixing screw of the compressor capacitor then pull it out see CJ_ODU_007 6 Disconnect the wires connected to the fan motor see CJ_ODU_007 CJ_ODU_007...

Page 46: ... way valve see CJ_ODU_008 3 Disconnect the wires connected to the transformer see CJ_ODU_008 4 Disconnect the other wires connected to terminals see CJ_ODU_008 5 Remove the PCB board see CJ_ ODU_008 6 Remove the screws of the capacitors see CJ_ODU_009 CJ_ODU_008 CJ_ODU_009 Note This section is for reference only Actual unit appearance may vary Fan Motor 4 Way Valve Compressor Transformer Capacitor...

Page 47: ...ove the panel plate electrical parts and fan assembly refer to 1 Panel plate 2 Electrical parts and 3 Fan assembly before disassembling sound blanket Procedure Illustration 1 Remove the sound blanket side and top see CJ_ODU_010 CJ_ODU_010 Note This section is for reference only Actual unit appearance may vary Sound Blanket side Sound Blanket top ...

Page 48: ...rts and fan assembly refer to 1 Panel plate 2 Electrical parts and 3 Fan assembly before disassembling compressor Procedure Illustration 1 Remove the flange nut of terminal cover and remove the termianal cover see CJ_ ODU_011 2 Disconnect the connectors see CJ_ ODU_012 CJ_ODU_011 CJ_ODU_012 Note This section is for reference only Actual unit appearance may vary Terminal Cover ...

Page 49: ...ted on the bottom plate see CJ_ODU_013 4 Heat up the brazed parts and then remove the the discharge pipe and the suction pipe see CJ_ODU_014 5 Lift the compressor from the base pan assembly with pliers CJ_ODU_013 CJ_ODU_014 Note This section is for reference only Actual unit appearance may vary Discharge Pipe Suction Pipe ...

Page 50: ...8 5 2 E0 EEPROM parameter error 59 5 3 E1 Indoor and outdoor unit communication error For MSAFD 21CRN1 QB6W MWFOT24S 60 5 4 E2 Zero crossing detection error diagnosis and solution 61 5 5 E3 Fan speed has been out of control diagnosis and solution 62 5 6 E4 E5 Open circuit or short circuit of temperature sensor diagnosis and solution 64 5 7 E7 Indoor PCB Display board communication error 65 5 8 EC ...

Page 51: ...ischarged before troubleshooting For other models connect discharge resistance approx 100Ω 40W or a soldering iron plug between the positive and negative terminals of the electrolytic capacitor The terminals are located on the bottom surface of the outdoor PCB Note This picture is for reference only Actual appearances may vary Electrolytic Capacitors ...

Page 52: ...ossing signal detection error Page 61 4 OFF E3 The indoor fan speed is operating outside of the normal range Page 62 5 OFF E4 Indoor room temperature sensor T1 is in open circuit or has short circuited Page 64 6 OFF E5 Evaporator coil temperature sensor T2 is in open circuit or has short circuited Page 64 9 OFF E7 Indoor PCB Display board communication error Page 65 7 OFF EC Refrigerant leak detec...

Page 53: ...ore field maintenance Problem Solution 1 Unit will not start Page 54 55 2 The power switch is on but fans will not start Page 54 55 3 The tempreture on the playboard cannot be setted Page 54 55 4 Unit is on but the wind is not cold hot Page 54 55 5 Unit runs but shortly stops Page 54 55 6 The unit startup and stop frequently Page 54 55 7 Unit runs continuously but insuffiient cooling heating Page ...

Page 54: ...56 57 5 Condenser Outdoor fan will not start Page 56 57 6 Unit runs but shortly stops Page 56 57 7 Compressor short cycles due to overload Page 56 57 8 High discharge pressure Page 56 57 9 Low discharge pressure Page 56 57 10 High suction pressure Page 56 57 11 Low suction pressure Page 56 57 12 Unit runs continuously but insuffiient cooling Page 56 57 13 Too cool Page 56 57 14 Compressor is noisy...

Page 55: ...rding the error code You can find the parts to replace by error code in the following table Part requiring replacement Error Code E0 E1 E2 E3 E4 E5 e7 EC Indoor PCB x Outdoor PCB x x x x x x x Indoor fan motor x x x x x x x Outdoor fan motor x x x x x x x x Temperature sensor x x x x x x T2 Sensor x x x x x x x Additional refrigerant x x x x x x x Display board x x x x x x x ...

Page 56: ...t will not start Operation is erratic unpredictable or unit is unresponsive The tempreture on the playboard cannot be setted Unit is on but the wind is not cold hot Unit runs but shortly stops The unit startup and stop frequently Unit runs continuously but insufficient cooling heating Cool can not change to heat Unit is noisy The unit emits a bad odor Test method remedy Test voltage Close the powe...

Page 57: ...t or outlet of either unit is blocked Interference from cell phone towers and remote boosters Shipping plates remain attached Check heat load Tighten bolts or screws Close all the windows and doors Remove the obstacles Reconnect the power or press ON OFF button on remote control to restart Remove them Others ...

Page 58: ...t Condenser Outdoor fan will not start Unit runs but shortly stops Compressor short cycles due to overload High discharge pressure Low discharge pressure High suction pressure Low suction pressure Unit runs continuously but insufficient cooling Too cool Compressor is noisy Horizontal louver can not revolve Test method remedy Test voltage Inspect fuse type size Inspect connections tighten Test circ...

Page 59: ...ulb Heavy load condition Loosen hold down bolts and or screws Shipping plates remain attached Poor choices of capacity Contact of piping with other piping or external plate Replace the compressor Leak test Replace restricted part Clean or replace Clean coil Check fan Change charged refrigerant volume Clean condenser or remove obstacle Purge evacuate and recharge Remove obstruction to air folow Rem...

Page 60: ...ture Sensor Check Disconnect the temperature sensor from PCB measure the resistance value with a tester Temperature Sensors Room temp T1 sensor Indoor coil temp T2 sensor Outdoor coil temp T3 sensor Outdoor ambient temp T4 sensor Measure the resistance value of each winding by using the multi meter ...

Page 61: ...it on 2 minutes later Is it still displaying the error code The unit is operating normally NO If the EEPROM chip is welded on main PCB replace the main PCB directly Otherwise check if the EEPROM chip plugged in main PCB well YES Is it plugged well Correct the connection NO Replace the indoor outdoor main PCB Remarks The location of the EEPROM chip on the indoor and outdoor PCB is shown in the foll...

Page 62: ...in The unit is operating normally NO Measure Vs Vs is the voltage between S and N of outdoor unit Red pan S Black pan N YES Is the voltage moving alternately between Positive and negative Check the outdoor wiring connection Is it normal NO Replace the outdoor PCB Power on Is the error resolved Replace the indoor PCB NO Check the indoor wiring connections Is it normal Replace the indoor PCB Power o...

Page 63: ...feedback for 4 minutes or the zero crossing signal time interval is abnormal Recommended parts to prepare Connection mistake PCB faulty Troubleshooting and repair Check the connections and power supply Correct the connections Turn on the unit when the power supply is good NO Indoor main PCB is defective Replace indoor main PCB YES Is it normal ...

Page 64: ...y fan motor Faulty PCB Troubleshooting and repair YES Power off then restart the unit after 2 minutes Is it within normal parameters Replace the fan motor Does a problem remain The unit is operating normally NO Shut off the power supply Rotate the fan by hand YES Does it turn easily Find the cause of the problem and resolve it NO Check the wiring of fan motor YES Is it improperly wired Ensure prop...

Page 65: ...and set the unit running in fan mode at high fan speed After running for 15 seconds measure the voltage of pin1 and pin2 If the value of the voltage is less than 100V 208 240V power supply or 50V 115V power supply the PCB must has problems and need to be replaced ...

Page 66: ...n 4 94V the LED will display the failure Recommended parts to prepare Wiring mistake Faulty sensor Faulty PCB Troubleshooting and repair Check the connection between temperature sensor and PCB Replace indoor or outdoor PCB Is it within acceptable parameters Is it properly wired Ensure proper connections NO Measure the resistance value of the sensor YES Replace the Sensor NO YES ...

Page 67: ...e Faulty PCB Display board malfunction Troubleshooting and repair Power off then restart the unit 2 minutes later Is it still displaying the error code Check the wirings and connection YES The unit is operating normally NO Are all the connections good Correct the connection or replace the Wirings NO Replace the indoor main PCB YES Is the error extinguished Replace the Display board NO ...

Page 68: ...turn off Recommended parts to prepare Faulty T2 sensor Faulty iIndoor PCB System problems such as leakage or blockages Troubleshooting and repair Power off then restart the unit 2 minutes later Are any leakages present Check System for blockages and clear blockages if present Does a problem remain Put your hands in front of the indoor air outlet YES Is there cool air blowing out from indoor air ou...

Page 69: ...Contents i Temperature Sensor Resistance Value Table for T1 T2 T3 and T4 C K 68 ...

Page 70: ...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 2133 119 246 0 36954 0 32 35 2024 40 104 5 17519 80 176 1 17393 120 248 0 35982 1 34 33 3269 41 106 4 96392 81 178 1 13604 121 250 0 35042 2 36 31 5635 42 108 4 76253 82 180 1 09958 122 252 0 3413 3 37 29 9058 43 109 4 5705 83 181 1 06448 123 253 0 33246 4 39 28 3459 44 111 4...

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