Discussion:
Hyster error code 90

Hi all
We have a Hyster E 4.50XL with an error code 90.( drive motor high temperature )
The truck only has to drive a few yards and this code comes on.Turn it off and on again and it might work for a further 20 minutes before coming on again.
Motor looks ok.clean , no earth faults and cold in temperature.
It has a Pyroban system on it,

Appreciate your assistance
  • Posted 25 Jun 2025 22:31
  • By Paddyteclinde
  • joined 3 Dec'21 - 32 messages
  • Ireland
Showing items 1 - 2 of 2 results.
Check thermal sensor on motor, could be that it is faulty causing an erroneous high temp reading
  • Posted 12 Sep 2025 07:57
  • By John_Bradley
  • joined 10 Aug'22 - 264 messages
  • Texas, United States
Jb69
Paddy,

First check is the battery. If it is fluid filled, make sure each cell is good. You may need to check cell voltage and specific gravity. If the battery is Li ion, make sure the voltage is reading correctly. Check all cable connections from controllers to drive motor. Good Luck
  • Posted 12 Sep 2025 06:16
  • By garland_m
  • joined 16 Oct'09 - 212 messages
  • Virginia, United States
Work Hard and Fish Long

Post your Reply

Forkliftaction accepts no responsibility for forum content and requires forum participants to adhere to our rules of conduct. Click here for more information.

If you are having trouble using the Discussion Forums, please contact us for help.

PREMIUM business

Shenzhen Wellwit Robotics Co., Ltd
The Largest AMR/AGV ODM/OEM Manufacturer in China.
Latest job alerts …
New York Staten Island, United States
Oxford Ct, United States
Latest job alerts …
New York Staten Island, United States
Oxford Ct, United States
Terberg YT223
Balling, Denmark
New - Sale
JLG G12-55A
Morgantown, Pennsylvania, United States
Used - Sale & Hire

PREMIUM business

Shenzhen Wellwit Robotics Co., Ltd
The Largest AMR/AGV ODM/OEM Manufacturer in China.
Editorial calendar - planned features
CONSTRUCTION FORKLIFTS
HANDLING GOODS IN THE COLD
LOADING/UNLOADING FREIGHT
BROWNFIELD AUTOMATION
FORKLIFT ATTACHMENTS
BATTERY AFFORDABILITY AND LIFETIME
FORKLIFT SAFETY

PREMIUM business

Shenzhen Wellwit Robotics Co., Ltd
The Largest AMR/AGV ODM/OEM Manufacturer in China.
Editorial calendar - planned features
CONSTRUCTION FORKLIFTS
HANDLING GOODS IN THE COLD
LOADING/UNLOADING FREIGHT
BROWNFIELD AUTOMATION
FORKLIFT ATTACHMENTS
BATTERY AFFORDABILITY AND LIFETIME
FORKLIFT SAFETY