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Omega OTEC IEWV Series Service Manual

High wall inverter
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Summary of Contents for Omega OTEC IEWV Series

  • Page 3 Troubleshooting . Troubleshooting 1 Error Code List Name of Error malfunction and Remark Way of display Aftersales Operation code status Oil return in cooling Display by remote Normal 3s to eliminate the mode controller display Display by remote Cold air protection Normal 3s to eliminate the controller...
  • Page 4 Troubleshooting Name of malfunction Error Remark Way of display After sales Operation and status code 1.Check the connection of Outdoor mainboard electric circuit broken/ Display directly 2.Check the reactor. 3.Check the outdoor AC return reactor broken Display by remote Alternating current compressor stop 200s Outdoor mainboard Change the mainboard...
  • Page 5 Troubleshooting Name of malfunction Remark Error code Way of display After sales Operation and status Change the sensor.If Indoor pipe sensor Check indoor pipe Display directly short circuit failure sensor short mainboard Outdoor temperature Check outdoor Change the sensor.If sensor short circuit Display directly temperature failure...
  • Page 6 Troubleshooting Function Auxiliary heating zero wire connector Cold plasma zero wire connector Power supply zero wire connector 4 AC motor connector wire connector AC motor feedback connector Up and down louver motor connector Left and right louver motor connector 10 WIFI 11 Sensor connector 12 Display connector wire connector...
  • Page 7 Troubleshooting Model: Top View NO. Silk scren name Connector Function note U(BU), Compressor interface Used to connect the compressor: U (BU) - (YE) - yellow blue, V, W (RD) - red V(YE),W(RD) Overload interface Used to connect the compressor overload protector, the two white lines. Random selection Electronic expansion valve interface Used to connect to the six core thermal package: tube temperature (20 k @ 25 TEMP...
  • Page 8 Troubleshooting View...
  • Page 9 Troubleshooting Model: Top View NO. Silk scren name Connector Function note U(BU), Compressor interface Used to connect the compressor: U (BU) - (YE) - yellow blue, V, W (RD) - red V(YE),W(RD) Overload interface Used to connect the compressor overload protector, the two white lines. Random selection Used to connect to the six core thermal package: tube temperature (20 k @ 25 TEMP Temp.sensor interface...
  • Page 10 Troubleshooting View...
  • Page 11 Troubleshooting Indoor unit (1) Malfunction of Temperature Sensor U0, U1 Main detection points: er loosened or poorly contacted? Start loosened or poorly contacted? Is malfunction eliminated Is malfunction eliminated Is malfunction eliminated...
  • Page 12 Troubleshooting (2) Malfunction of Blocked Protection of IDU Fan Motor L2 Main detection points: Insert t e control te...
  • Page 13 Troubleshooting (3) Malfunction of Protection of Jumper Cap L0 Main detection points: Start eliminated eliminated Replace t eliminated...
  • Page 14 Troubleshooting (4) Malfunction of Zero-crossing Inspection Circuit Malfunction of the IDU Fan Motor L1 Main detection points: Malfunction diagnosis process: Start f for 1minute,the turn back on The unit returns to normal. U8 is still abnormal.Replace the mainboard...
  • Page 15 Troubleshooting Outdoor unit: (1) Capacitor charge fault (Fault with outdoor unit) (AP1 below refers to the outdoor control panel) Main Check Points: AC voltmeter to check if the voltage between terminal L and N on the wiring board is within 210VAC~240VAC. Fault diagnosis process: Turn on the unit and wait 1 minute...
  • Page 16 Troubleshooting (2) IPM Protection , Out-of-step Fault , Compressor Phase Over current (AP1 below refers to the outdoor control panel) Main check points: AP1 and compressor COMP secure? Loose? Is the connection in correct order? the voltage input of the machine within normal range? (Use AC voltmeter to measure the voltage between terminal L and N on the wiring board r coil against the copper tube in good condition? Fault diagnosis process: Energize and...
  • Page 17 Troubleshooting (3) High temperature and overload protection diagnosis (AP1 hereinafter refers to the control board of the outdoor unit) Mainly detect: Fault diagnosis process: Overheat and high temperature protection Normal protection, please operate it after the outdoor ambient temp- erature is normalized. 20 minutes after the complete unit is powered off.
  • Page 18 Troubleshooting (4) Start-up failure (following AP1 for outdoor unit control board) Mainly detect:...
  • Page 19 Troubleshooting (5) Out of step diagnosis for the compressor (AP1 here in after refers to the control board of the outdoor unit) Mainly detect: Fault diagnosis process: Out of step occurs in Out of step occurs once the operation Replace the fan OFAN is connected correctly compressor longer than capacitor C1...
  • Page 20 Troubleshooting (6) Overload and air exhaust malfunction diagnosis (following AP1 for outdoor unit control board) Mainly detect: Fault diagnosis process: 20 minutes after the complete unit is powered off FA for the Connect the electronic expansion valve wires correctly Resistances between the first four pins close to the terminal hole and the fifth pin are almost the same, less than 100 ohm.
  • Page 21 Troubleshooting (7) Power factor correct (PFC) fault P9 (a fault of outdoor unit) (AP1 here in after refers to the control board of the outdoor unit) Mainly detect: Start reactor of the outdoor unit and the Whether there is any wiring diagram and If the fault is eliminated? damage or...
  • Page 22 Troubleshooting (8) Communication malfunction (following AP1 for outdoor unit control board) Mainly detect: any damage? Start wiring diagram detection circuit...
  • Page 23 Troubleshooting (9) Malfunction of Overcurrent Protection Main detection points: Start of air inlet and outlet Replace t e ain oard...
  • Page 24 Troubleshooting 1. Air Conditioner Can't be Started Up Possible Causes Discriminating Method (Air conditioner Status) Troubleshooting No power supply, or poor After energization, operation indicator isn’t bright yes,wait for power recovery. If not, check power connection for power plug and the buzzer can't give out sound supply circuit and make sure the power plug is connected well.
  • Page 25 Troubleshooting 4. ODU Fan Motor Can't Operate Possible Causes Discriminating Method (Air conditioner Status) Troubleshooting Connect wires according to wiring diagram to Wrong wire connection, or poor Check the wiring status according to circuit make sure all wiring terminals are connected connection diagram Measure the capacity of fan capacitor with an...
  • Page 26 Troubleshooting Appendix1:Resistance Table for Indoor and Outdoor Ambient Temperature Sensors (15K) Temp.( Temp.( Temp.( Temp.( 22.53 4.986 1.451 138.1 21.51 4.802 1.408 128.6 20.54 4.625 1.363 121.6 19.63 4.456 1.322 18.75 4.294 1.282 108.7 17.93 4.139 1.244 102.9 17.14 3.99 1.207 97.4 16.39...
  • Page 27 Troubleshooting Appendix2:ResistanceTable for Indoor and Outdoor Ambient Temperature Sensors (20K) Temp.( Temp.( Temp.( Temp.( 361.8 48.42 9.803 2.663 339.8 46.11 9.42 2.577 319.2 43.92 9.054 2.495 41.84 8.705 2.415 282.2 39.87 8.37 2.339 265.5 38.01 8.051 2.265 249.9 36.24 7.745 2.194 235.3 34.57...
  • Page 28 Troubleshooting Appendix 3: Resistance Table for Indoor and Outdoor Ambient Temperature Sensors (50K) Temp. Resistance Temp. Resistance Temp. Resistance Temp. Resistance Temp. Resistance 911.56 119.08 24.128 6.542 2.2409 853.66 113.37 23.186 6.3315 2.1816 799.98 107.96 22.286 6.1288 2.1242 750.18 102.85 21.425 5.9336 2.0686...
  • Page 29 Removal Procedure A: Open the front panel. B: Loosen the screws of the display board with screw driver. C: Push the rotor shaft on both sides of the panel to make it separate from the groove. Remove the panel. Display board Remove axial sleeve of guide louver.
  • Page 30 Removal Procedure Electric box cover Loosen the screws of the electric box cover with screw driver. remove it. Filter A: Open the screw cap on the front case. B: Remove the front case to seperate it with bottom assembly.
  • Page 31 Removal Procedure A: Disconnect the indoor tube temperature Electric box sensor. B: Remove the screws at the joint of the earthing wire and evaporator. C: Loosen the clasp at the joint of the electric box. A: Remove the screws at the joint of the evaporator and rear case.
  • Page 32 Removal Procedure B: Remove the screws at the joint of the cross Take down the motor. Motor...
  • Page 33 Removal Procedure Screw Top cover Remove connection screws connecting the top cover plate with the front panel and the right side plate, and then remove the top panel. remove the protective grille. Screw...
  • Page 34 Removal Procedure A: Remove connection screws between the front grille and the front panel. Then remove the front grille. B: Remove connection screws connecting the front panel with the chassis and the motor support, and then remove the front panel. Grille Front panel Screw...
  • Page 35 Removal Procedure Remove connection screws connecting the left side plate with the condenser assy. Then remove the left side plate. Right side plate Remove connection screws connecting the right side plate with the valve support and the electric box. Then remove the right side plate. Electric box assy Screw loosen the wire bundle and unplug the wiring...
  • Page 36 Removal Procedure the reactor Reactor Screw Motor support disconnect the leading wire insert of the motor. Motor Then remove the motor. Remove tapping support to remove it. Screw Acoustic cotton 1 Split the acoustic cotton lock,and take out 3 pcs slowly. NOTE: Do not damage the pipe.
  • Page 37 Removal Procedure Unsolder the spot weld of 4-way valve assy, compressor and condenser, and then remove the 4-way valve assy. 4-way valve assy Discharge the refrigerant completely before unsoldering,when unsoldering, wrap the gas valve with awet cloth completely to avoid damage to the valve caused by high temperature.
  • Page 38 Removal Procedure Unsolder the spot weld of expansion valve Expansion valve Assy assy, liquid valve and condenser, and then remove the expansion valve assy . and unsolder the welding joint between the gas valve and the air-return pipe to remove the gas valve.

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