Doosan B20T-5:
Error Code F3 Inverter Fault and F6 R Motor Offline

I have a Doosan B20T-5 Electric with intermittent Trouble codes F3 Inverter Fault and F6 R motor offline. Does one cause the other to pop up or what causes this codes to display? Also, I know that this lift has a D/D Converter. Is this the same as the inverter? A little help please.
  • Posted 16 Jul 2014 12:20
  • Discussion started by Tino
  • North Carolina, United States
Showing items 1 - 3 of 3 results.
The Power Inverters are located in the back panel, and yes for that model there are 3 power inverters, two traction and one pump. I would suggest you check the power inverters with Ohm meter from Batt post to then UVW terminals and check resistance. The do the same tests from Batt- connector to all three phases.
  • Posted 15 Aug 2019 22:42
  • Reply by sirthor1881
  • Georgia, United States
we are having the same issue any solution
  • Posted 9 Aug 2019 02:29
  • Reply by doyle_l
  • Iowa, United States
A little update here. I've been doing a little research and this is what I've found about this piece of equipment;

F3- Inverter Fault actually means drive right module desat/overcurrent
F6- R Motor Offline actually means drive right motor current offset

Also found out that this F/L has 3 inverters - one for each drive motor and one for the pump motor. So, I believe that the right inverter may be defective (F3) and causing the F6 code.

Just gotta find out where the inverters are located and I should be good to go.
  • Posted 17 Jul 2014 05:01
  • Reply by Tino
  • North Carolina, United States

Having trouble using the Discussion Forums? Contact us for help.

Forkliftaction.com accepts no responsibility for forum content and requires forum participants to adhere to the rules. Click here for more information.

Featured Business
F. Uchiyama
Global exporter of used forklift and construction machinery, servicing over 50 countries.
Machinery-onQ Listings
Komatsu FD30T14
  • KomatsuFD30T14
  • 2000 | Used - Sale
  • Netherlands
  • EUR 5,750
Denyo DCA400ESM
  • DenyoDCA400ESM
  • 2007 | Used - Sale
  • Japan
Linde H30D01
  • LindeH30D01
  • 2011 | Used - Sale
  • Netherlands
  • EUR 8,500
Denka DL21
  • DenkaDL21
  • 2008 | Used - Sale
  • Netherlands
  • EUR 16,500
Denyo DCA400ESM
  • DenyoDCA400ESM
  • 2006 | Used - Sale
  • Japan
Nissan FGJ02A30U
  • NissanFGJ02A30U
  • 1998 | Used - Sale
  • Netherlands
  • EUR 4,750
Mitsubishi FD35A
  • MitsubishiFD35A
  • 1998 | Used - Sale
  • Netherlands
  • EUR 5,250
Grove MZ82C
  • GroveMZ82C
  • 1998 | Used - Sale
  • Netherlands
  • EUR 12,750
TCM FD40Z2
  • TCMFD40Z2
  • 1981 | Used - Sale
  • Netherlands
  • EUR 4,750
Toyota 02-5FD35
  • Toyota02-5FD35
  • 1994 | Used - Sale
  • Netherlands
  • EUR 6,750
Featured Business
Ningbo Ruyi Joint Stock Co., Ltd.
Manufacturer of forklifts, power stackers & pallet trucks.
Machinery-onQ Listings
Linde H30D01
  • LindeH30D01
  • 2011 | Used - Sale
  • Netherlands
  • EUR 8,500
Denyo DCA400ESM
  • DenyoDCA400ESM
  • 2007 | Used - Sale
  • Japan
Nissan FGJ02A30U
  • NissanFGJ02A30U
  • 1998 | Used - Sale
  • Netherlands
  • EUR 4,750
Komatsu FD30T14
  • KomatsuFD30T14
  • 2000 | Used - Sale
  • Netherlands
  • EUR 5,750
Mitsubishi FD35A
  • MitsubishiFD35A
  • 1998 | Used - Sale
  • Netherlands
  • EUR 5,250
Denyo DCA400ESM
  • DenyoDCA400ESM
  • 2006 | Used - Sale
  • Japan
TCM FD40Z2
  • TCMFD40Z2
  • 1981 | Used - Sale
  • Netherlands
  • EUR 4,750
Toyota 02-5FD35
  • Toyota02-5FD35
  • 1994 | Used - Sale
  • Netherlands
  • EUR 6,750
Grove MZ82C
  • GroveMZ82C
  • 1998 | Used - Sale
  • Netherlands
  • EUR 12,750
Denka DL21
  • DenkaDL21
  • 2008 | Used - Sale
  • Netherlands
  • EUR 16,500