Kouwa Service & Repair Forum

Our tuner got a E9 error and then the controller went out. Pulled the controller cover and found NB0793 is smoked. We are trying to locate another circuit board to replace it with or maybe even have this one repaired; whatever is the quickest. Thanks, Chris Haigler

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Recent 58 Comments

#Kouwa by John Demers on 2019-12-04 21:57

Mazak 6800 HMC uses Model KMV-150-M14-C. Had a 30 amp trip shut down machine. Traced to low oil in the in the Hysol (Left side oil fill port). Still tripped. The CM motor starter 4th from left was dirty with carbon. We changed it out. Still trips. We ohm'ed out the motor. Seemed good. Thinking …Purchase or Repair: ...Mazak 6800 HMC uses Model KMV-150-M14-C. Had a 30 amp trip shut down machine. Traced to low oil in the in the Hysol (Left side oil fill port). Still tripped. The CM motor starter 4th from left was dirty with carbon. We changed it out. Still trips. We ohm'ed out the motor. Seemed good. Thinking what the motor is spinning had frozen up but the e stop won't go away and the chiller never starts. I get the 4 dashes at boot up and I can push the parameter button to see A200. Nothing else shows on the display, no alarms.

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#Kouwa by Vishal Hadai on 2025-05-21 18:49

We are currently encountering an error code E9 on our unit, which indicates low oil pressure (flow). I am unsure why this is happening, as the three circulation pumps and the compressor are not activating. Additionally, the CNC lathe which we are using the unit on, does not trigger an alarm indicati…Purchase or Repair: ...We are currently encountering an error code E9 on our unit, which indicates low oil pressure (flow). I am unsure why this is happening, as the three circulation pumps and the compressor are not activating. Additionally, the CNC lathe which we are using the unit on, does not trigger an alarm indicating that the unit is not cooling the oil. Can you assist us in understanding the problem and finding a solution? Thank you in advance.

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#Kouwa by Bonnie Foor on 2010-04-23 19:36

Hello, I am with a HVAC/R company in Southeastern Michigan and have a customer with a Kouwa chiller that needs a new compressor, I would like to help them out, can anyone point in the right direction? i called the number above but only got voicemail. It is considered an urgent situation and i would …Purchase or Repair: ...Hello, I am with a HVAC/R company in Southeastern Michigan and have a customer with a Kouwa chiller that needs a new compressor, I would like to help them out, can anyone point in the right direction? i called the number above but only got voicemail. It is considered an urgent situation and i would like to get an answer to my customer as soon as possible. Thank you!!!!!

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#Kouwa by Jim on 2013-09-23 20:48

Kouwa KMV-150-M16-A throws an E8 code. Ambient pressure is around 140psi at 75 degrees. Unit will run for about 3 -5 minutes and throw the code. Current to the compressor is about 3.6 amps. Is this a good value? On page 8 of the check out procedure the term \"thermal setting value\" for current i…Purchase or Repair: ...Kouwa KMV-150-M16-A throws an E8 code. Ambient pressure is around 140psi at 75 degrees. Unit will run for about 3 -5 minutes and throw the code. Current to the compressor is about 3.6 amps. Is this a good value? On page 8 of the check out procedure the term \"thermal setting value\" for current is listed in the E8 alarm procedure. What is the normal thermal setting value for current draw? What are the normal operating pressures and current load for this unit when running properly? Any ideas on what needs to be replaced?

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#Kouwa by Andrew Maass on 2013-01-25 21:44

The above Model is on a Machine where I continually get an \"E8\" Error for Thermal Relay Overload. The Compressor will run for no more than 1 minute. Amps or Watts run high. Seems like an internal failure on Compressor. Any other thoughts before I replace Compressor? Condenser Coil is clean, great …Purchase or Repair: ...The above Model is on a Machine where I continually get an \"E8\" Error for Thermal Relay Overload. The Compressor will run for no more than 1 minute. Amps or Watts run high. Seems like an internal failure on Compressor. Any other thoughts before I replace Compressor? Condenser Coil is clean, great airflow. Nothing noticeable at Liquid Filter screen before Cap Tube.Also on this Unit it says Refrigerant is R407C. Any ideas on how much Refrigerant is in System in pounds?Any Tech info on this unit in regards to the Refrigeration cycle would be great.Thank you,Andrew Maass

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#Kouwa by Alan Trimue on 2017-04-06 10:33

Good morning our unit a KMV-150-M16-C. tHREW AN E8 fault. Per Mazak tech he said it was a bad compressor. We are trying to locate a compressor for this unit. We have a very hot job to run on this machine and need it repaired asap. Any help would be greatly appreciated. If you need additional info ca…Purchase or Repair: ...Good morning our unit a KMV-150-M16-C. tHREW AN E8 fault. Per Mazak tech he said it was a bad compressor. We are trying to locate a compressor for this unit. We have a very hot job to run on this machine and need it repaired asap. Any help would be greatly appreciated. If you need additional info call Alan E. Trimue at 989-274-5675. Thank you.

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#Kouwa by Holohan Heating and Sheetmetal on 2011-10-07 13:07

I have a customer that is using a Kouwa Mod# KMU-150-M-16-B S/N 181776 oil cooler. Can you tell me what pressures to expect and how much 407C is supposed to be in the unit? We just replaced a stuck compressor and my suction pressure is at 0Psi. Performed system flush, installed new strainer and cap …Purchase or Repair: ...I have a customer that is using a Kouwa Mod# KMU-150-M-16-B S/N 181776 oil cooler. Can you tell me what pressures to expect and how much 407C is supposed to be in the unit? We just replaced a stuck compressor and my suction pressure is at 0Psi. Performed system flush, installed new strainer and cap tube. Mazak hasn\'t a clue.ThanksJohn ArrinigtonHolohan Inc.Kankakee,Illinois

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#Kouwa by Rashpal Singh on 2016-09-28 09:05

Hello there,We have Mazak 410 VMC with Serial no. 175268. There is Kouwa Liquid Tuner installed in it for spindle lubrication with Model no. KMV-75-M02-B with Mfg. No. 0607-M9038. It shows EE alarm on display and we are not capable to remove it. Kindly provide a suitable person or mail-id or if you …Purchase or Repair: ...Hello there,We have Mazak 410 VMC with Serial no. 175268. There is Kouwa Liquid Tuner installed in it for spindle lubrication with Model no. KMV-75-M02-B with Mfg. No. 0607-M9038. It shows EE alarm on display and we are not capable to remove it. Kindly provide a suitable person or mail-id or if you can provide support through mail-id. Our machine is idle from last 20 days. Thanks & RegardsRashpal SinghIn-charge CNC SectionFor Ambika Overseas,Model House Road, Basti Shiekh,Jalandhar - Punjab (INDIA)

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#Kouwa by ADRIAN PENA ALANIS on 2014-04-03 15:29

Hello, We have a bad compressor SANYO part: C-2RN153H3A code: 80805183 This it installed on KOUWA LIQUID TUNER model: KMV-150-M16-B Mfg. No. 0601-M7189 Could you send us please price and delivery time. We are in Nuevo León, México. Please, send the answer as soon as posibble. Thanks.—> …Purchase or Repair: ...Hello, We have a bad compressor SANYO part: C-2RN153H3A code: 80805183 This it installed on KOUWA LIQUID TUNER model: KMV-150-M16-B Mfg. No. 0601-M7189 Could you send us please price and delivery time. We are in Nuevo León, México. Please, send the answer as soon as posibble. Thanks.

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