Nichiyu FB10P FB14P FB15P FB18P FB20P FB25P FB28P FB30P 75 Series Forklift Troubleshooting Manual – SICOS-AC Diagnostic PDF

Description

The Nichiyu FB10P FB14P FB15P FB18P FB20P FB25P FB28P FB30P 75 Series Forklift Troubleshooting Manual is the full SICOS-AC diagnostic reference for the FB-75 series electric counterbalanced forklift trucks. Published by Nippon Yusoki Co., Ltd. (Nichiyu) of Kyoto, Japan, it covers the FB10P through FB30P 75-series machines in both 48V and 72V configurations, giving service technicians everything needed to read fault codes, adjust the SICOS-AC controller, verify sensors and actuators, and trace wiring across the traction, hydraulic, and power-steering systems.

File Details

• Manual type: Troubleshooting manual (service diagnostic reference)
• Brand: Nichiyu / Nippon Yusoki Co., Ltd.
• Series: FB-75 (SICOS-AC equipped)
• Language: English
• Page count: 110 pages
• File format: PDF
• Issued by: Nippon Yusoki Co., Ltd., Kyoto, Japan – Overseas Division
• First printing: December 2003

Chapters Covered

• 1. Introduction – What’s new in FB-75, FB-75 new features, battery discharge indicator (5-step versus 10-step indication)
• 2. Adjustment of SICOS-AC
  • 2-1. Explanation of the monitor display – indicator panel, indication of display, function of display, various kinds of mode selection (slow speed, travel mode, meter mode, display mode, regeneration/neutral mode, date and time)
  • 2-2. Explanation of the MPU board – basic control board construction, travel/hydraulic board, display board, rotary switches, adjustment standards list, confirmation of other services
  • 2-3. SICOS-AC check and adjustment – chassis insulation, battery voltage, current detector, forklift model setting, control safety circuit, hydraulic setting, descending regeneration, switch-back braking force, regenerative braking force, safety monitor symbol, display language, optional setting, display brightness, hour meter, auto power off, battery electrolyte level, turn signal lamp, hydraulic oil level, brake oil level, overload, travel inhibitor, cooling fan, lift interrupt, turning speed reduction, laser pointer, accelerator potentiometer, seat switch, automated fork horizontal stop, built-in charger
• 3. Troubleshooting
  • 3-1. Self diagnosis function – display, error messages and display conditions
  • 3-2. Error history memory – memory 1, memory 2, clearing the error history memory
  • 3-3. I/O Check – I/O check mode display method, I/O port table
• 4. Wiring and main controller layout – system wiring, body wiring, body harness, controller wiring, controller harness, main controller, BC wiring (400V and 200V), charger harness, revolving light, working lamp, chime, license, load sensor, lift limit, seat heater, rear lamp, FS, wiper, automated fork horizontal stop wiring

Across those four chapters the manual walks a technician from basic orientation with the SICOS-AC system through every adjustment screen, diagnostic check, and wiring point needed to keep an FB-75 series truck operating correctly. The troubleshooting chapter alone maps out more than thirty error messages, from B11 IGBT-TRAVEL and C21 IGBT-HYD through D30 FUSE-EPS and the W-series warnings such as RELEASE PARKING BRAKE and CHARGE THE BATTERY, with the display symbols, conditions, and probable causes for each. Chapter 4 supplies the corresponding electrical traces so the fault can actually be found and repaired rather than just identified.

SICOS-AC Monitor and Diagnostic Coverage

A major part of the manual is dedicated to the SICOS-AC monitor: how to read the battery discharge indicator, the turtle (slow speed) icon, the fork horizontal indicator, travel speed meter, calendar and clock, hour meter, and the ten safety monitor symbols that flash for traction, hydraulic, power steering, brake fluid, battery electrolyte, overload, hydraulic oil, and parking brake faults. The screen-by-screen settings chapters cover every rotary switch position on the display board and travel/hydraulic board, including the RS1 model-selection table (FB10P through FB30P plus the -U variants and FBB models), battery voltage setting, current detector verification, plugging and regenerative braking force, and controller language selection.

Wiring and Controller Layout

System wiring diagrams are provided separately for the 48V FB10P-28P-75 and the 72V FB30P-75, along with full body wiring, body harness connectors, main controller layout, battery charger wiring for both 400V and 200V supplies, and wiring for revolving lights, working lamps, chimes, license lamps, load sensors, lift limits, seat heaters, rear lamps, wipers, and the automated fork horizontal stop system. The controller section identifies connector pinouts, gate-connector orientation, IGBT module installation torque, and the SICOS-AC board types (PB103, PB104, PB100) used across the series.

Who This Manual Is For

This Nichiyu FB-75 series troubleshooting manual is written for forklift service technicians, fleet maintenance departments, and electrically qualified mechanics responsible for the FB10P, FB14P, FB15P, FB18P, FB20P, FB25P, FB28P, and FB30P 75-series machines. Its focus is fault diagnosis and repair rather than general operation, so it pairs well with the operating manual and workshop manual for a full service library. Anyone dealing with the SICOS-AC controller, reading error history from the memory screens, running I/O checks on the travel or hydraulic CPU, or tracing a wiring fault through the body harness will find the exact pages they need.

Whether you are chasing a TURN OFF KEY SWITCH interlock, verifying that a repaired truck’s software numbers match the model, or simply learning how to set the slow speed limit, display brightness, or neutral regeneration strength, this Nichiyu FB10P FB14P FB15P FB18P FB20P FB25P FB28P FB30P 75 Series Forklift Troubleshooting Manual delivers the procedures and reference values in one document. It also gives a clear picture of the error-history memory so a technician can see whether a fault is a one-off or a recurring problem across a fleet.

IMAGES PREVIEW

Stop guessing at intermittent SICOS-AC faults, misreading safety monitor symbols, or pulling a controller without first checking the model selection rotary switch. With the Nichiyu FB-75 series troubleshooting manual at hand you can diagnose the fault, confirm the correct procedure and reference value, and complete the repair with confidence. Delivered as an instant PDF download – no shipping, no waiting, printable from any computer, tablet, or phone, and ready to open on the shop floor or in the service truck.