ThyssenKrupp Flow2 User Manual

2007.03.07Flow2 stairliftTab 06: Systematic fault finding
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4 Error messages
4.1 General
The Flow2 software has a number of error messages. When a fault occurs the code is shown as a 2-
digit number in the display preceded by an ‘E’.
Error codes have the highest priority and will therefore overrule other messages (mode, battery
voltage, etc.).
When fault finding it can be important whether the code was generated by the main processor or the
safety processor. The safety processor always gives the main processor the chance to generate an
error code itself. If the main processor does not do that, while it is necessary, the safety processor
takes action. When the code is generated by the safety processor, there will be a point between the
‘E’ and the error code in the display. The point is not shown when the error is generated by the main
processor. Thus ‘E10’ is generated by the main processor and ‘E.10’ by the safety processor.
The error codes mean the same thing.
4.2 Error handling
This chapter describes the possible error messages and how these error messages can be
interpreted, resolved and reset.
The following concepts require some explanation:
The following faults can be generated:
Priority: This indicates the priority of the fault.
When more than one fault is generated, the fault with the highest priority is
shown in the display.
Mode: This indicates the position of the mode switch in which the fault was recognised.
Error code E01
Type of error Control error
Error message Software inconsistency error
Description Occurs when all controls are out and the main relay is still switched on after 3
seconds. The error indicates that 'somewhere' in the control a wrong decision
has been made.
Priority Highest

ThyssenKrupp Flow2 Specifications

General

Weight capacity	125 kg
Drive	Rack and pinion
Power supply	Rechargeable battery
Maximum Weight Capacity	125 kg
Speed	0.15 m/s
Foldable Arms	Yes
Foldable Footrest	Yes
Safety Belt	Yes
Control Type	Joystick or remote control
Battery Backup	Yes
Noise Level	Low
Seat Rotation	Powered
Track Type	Single tube
Seat Type	Padded seat

Summary

Introduction

Systematic Faultfinding

Method

Step-by-step approach to fault finding.

Collecting information and defining the problem

Gathering user input and understanding the fault.

Fault analysis

Steps to analyze and pinpoint the cause of a fault.

Carry out corrective action

Implementing repairs and providing customer advice.

At the customer's home, or in the workshops?

Deciding where to perform repairs for efficiency.

Monitor the effect

Verifying that the corrective action resolved the issue.

Correct completion of a fault notification

Administrative tasks after a repair is completed.

Flow subsystems

The power supply system

Overview of the stairlift's power supply components and voltages.

The drive system

Schematic and fault finding for the stairlift's drive mechanism.

The horizontal system

Schematic and fault finding for the stairlift's horizontal movement.

The swivel system

Schematic and fault finding for the stairlift's swivel function.

The controls

Schematic and fault finding for the stairlift's remote controls and receiver.

Error messages

General

Introduction to error codes, their format and priority.

Error handling

Concepts like priority and mode for interpreting errors.

Overview of possible error codes

Summary table of all error codes, reset, priority, and mode.

Error code E51

Bad rail connection

Troubleshooting a stop caused by a rail joint issue.

Stairlift stopped at emergency end stop

Troubleshooting a stop at an emergency end stop.

Overspeed governor has operated

Troubleshooting when the overspeed governor has been activated.