Table of Contents
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Table of Contents
Troubleshooting
Related Manuals for Omega OTEC IEWB Series
Summary of Contents for Omega OTEC IEWB Series
- Page 1 IEWB/ICHB Series 19 SEER Hygienic Mini Split Service Manual 208~230V/1/50-60Hz...
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Page 2: Table Of Contents
Content 1. Safety Precautions ......................... 1 2. Troubleshooting ........................... 4 2.1 Safety caution ........................4 2.2 Error diagnosis and solution without error code ..............4 2.3 Error code list ........................6 2.4 Spot check ......................... 7 2.4 Troubleshooting by error code ................... 8 Indoor unit error ...................... -
Page 3: Safety Precautions
1. Safety Precautions Read Safety Precautions Before Installation Incorrect installation due to ignoring instructions can cause serious damage or injury. The seriousness of potential damage or injuries is classified as either a WARNING or CAUTION. This symbol indicates that ignoring instructions may cause death or serious injury. This symbol indicates that ignoring instructions may cause moderate injury to your or damage to your appliance or other property. - Page 4 III. Electrical Warnings Only use the specified power cord. If the power cord is damaged, it must be replaced by the manufacturer or certified service agent. Keep power plug clean. Remove any dust or grime that accumulates on or around the plug. Dirty plugs can cause fire or electric shock.
- Page 5 2 Specifications 2.1 Model Reference Refer to the following table to determine the specific indoor and outdoor unit model number of your purchased equipment. Hygienic Heat pump Capacity Indoor unit model Outdoor unit model Power supply (Btu/h) IEWB009J1A-CWJ026CWA ICHB009J1A-CTJ026GFA 115V/60Hz/1Ph IEWB012J1A-CWJ035CWA ICHB012J1A-CTJ035GFA IEWB009J0A-CWJ026CWA ICHB009J0A-CTJ026GFA...
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Page 6: Troubleshooting
2 Troubleshooting 2.1 Safety caution ⚫ Be sure to turn off all power supplies or disconnect all wires to avoid electric shock. While checking indoor/outdoor PCB, please equip oneself with antistatic gloves or wrist strap to avoid damage to the board. ⚫... - Page 7 When the room humidity is relatively high, the cooling operation or heating operation defrosting Mist is blown out. ends, the air outlet may blow out water mist, which is a normal physical phenomenon. When the ambient humidity is relatively high, water droplets will be generated in the air outlet, panel and other parts, which is a normal physical phenomenon;...
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Page 8: Error Code List
2.3 Error code list 2.2.1 Indoor unit error code Definitions of malfunction Error code Communication failure between indoor and outdoor unit T1 room temperature sensor fault T2 temperature sensor fault T2B temperature sensor fault Outdoor unit fault Zero-crossing detection fault EEPROM error PG fan motor stall protection Communication fault of wired controller... -
Page 9: Spot Check
Primary / secondary over-current protection High discharge temperature protection High condenser temperature protection IPM module fault IDU anti-frosting protection High IPM temperature protection Outdoor unit fan motor stall protection High evaporator temperature protection DC bus low voltage protection DC bus high voltage protection MCE fault / sync / compressor start fault Zero speed protection Phase sequence error protection... -
Page 10: Troubleshooting By Error Code
Content Setting temperature Indoor temperature (T1), Indoor unit evaporator temperature (T2 or T2B) EEPROM code Software code Outdoor unit error code Outdoor unit running frequency Outdoor unit condenser temperature (T3) Outdoor ambient temperature (T4) Indoor unit fan speed (f0 means 1500rpm, a1 means 1010rpm) 2.4 Troubleshooting by error code Indoor unit error 2.4.1 E1 (IDU) Communication failure between indoor and outdoor unit... -
Page 11: E6 (Idu) Zero-Crossing Detection Fault
Faulty PCB Troubleshooting and repair: a) Check the connection between temperature sensor and PCB. b) Measure the resistance of sensor, and compare it with appendix table. c) If above items are no problem, replace a new PCB. 2.4.3 E6 (IDU) Zero-crossing detection fault Description: When PCB does not receive zero crossing signal feedback for 4 minutes or the zero crossing signal time interval is abnormal. -
Page 12: E9 (Idu) Communication Fault Of Wired Controller
b) Cut off the power supply and rotate the fan blade by hand. If it can’t rotate smoothly, check if there is any block. Otherwise, go to next step. c) Check the wiring of fan motor. d) Measure the voltage of fan motor from PCB. If the parameters are normal, replace a new fan motor. If not, replace indoor unit PCB. -
Page 13: Outdoor Unit Error
Faulty problem Troubleshooting and repair: a) Check if there is a short circuit in CN2 port. b) Change a new PCB. Outdoor unit error 2.4.8 E2 (ODU) Communication failure between indoor and outdoor unit Same as 5.4.1 2.4.9 E4, E5, E6 (ODU) temperature sensor fault Same as 5.4.2 2.4.10 E9 (ODU) AC over-voltage / under-voltage protection Description: Abnormal increases or decreases in voltage are detected by checking the specified... -
Page 14: E2X Outdoor Unit Fan Motor Fault
Refrigerant system leakage or block Faulty outdoor unit PCB Connection problem Troubleshooting and repair: a) Check the power supply. b) Check the fastening screws on the PCB and IPM radiator. If they are not fixed tightly, tighten the screws and apply silicon grease. -
Page 15: P4 High Discharge Temperature Protection
Refrigerant is too much Liquid side is block Heat exchanging in outdoor unit is not good Compressor malfunction 2.4.17 P4 High discharge temperature protection Description: discharge temperature is higher than 115℃. Possible reason: Lack of refrigerant ... -
Page 16: P7 Idu Anti-Frosting Protection
Phase sequence error protection Compressor stall fault Possible reason: Wrong wire connection IPM malfunction Compressor malfunction Faulty PCB Troubleshooting and repair: a) Check the wiring between PCB and compressor. b) Check the outdoor unit fan and ventilation. c) Check the IPM in PCB. -
Page 17: P9 Outdoor Unit Fan Motor Stall Protection
Change a new outdoor unit PCB. 2.4.22 P9 Outdoor unit fan motor stall protection Please refer to 5.4.5 2.4.23 P11 High evaporator temperature protection Description: Indoor unit evaporator temperature (T2) is higher than 65℃. Possible reason: Abnormal T2 temperature sensor ... - Page 18 OMEGA IEWB/ICHB Certified Mini Split Service Manual info@otecomega.com info@otecomega.com www.otecomega.com www.otecomega.com IEWB(CHB)I(J)0(1,2)A-SM1G0922...