Schindler 5500 Error Codes Top [hot] Page

The rice used for sushi must be acidified with acetic acid (vinegar) to pH less than 4.6 to inhibit the growth of pathogenic bacteria. To measure pH, simply place a sample of rice mixture onto the flat sensor of LAQUAtwin pH meter.

schindler 5500 error codes top

Measure the +24VR lines on the mainboard to confirm stable DC voltage. schindler 5500 error codes top

The door operator detected an obstruction (real or phantom) three times in a row. The Schindler 5500 displays active faults on the

This won’t stop the car, but passengers will panic. Replace with Schindler-approved LED kits. This won’t stop the car, but passengers will panic

What the elevator it faulted out (e.g., opening doors, running at high speed, sitting idle)

This group of errors is critical as they often lead to immediate emergency stops and block the elevator from service until manually reset. These faults typically originate from unexpected signals in the safety circuit or inspection inputs.

An excessive current spike is detected in the motor, usually indicating a drive failure or motor overload.

Introduction

Rice used for sushi must have a pH of less than 4.6. At pH levels below 4.6, most pathogenic bacteria do not grow or produce toxins¹. Thus, the rice must be acidified using acetic acid (vinegar) to be classified as non-hazardous. The LAQUAtwin pH pocket meter is used as quality control check to ensure that the rice is adequately acidified, before selling to consumers. This is an easy, quick check method used to abide to the ANZ Standards² in ensuring that customers are safely consuming sushi.

Method

Acetic acid (vinegar) should be mixed into the rice according to the following table:

schindler 5500 error codes top

A small sample of the rice mixture is placed on the flat sensor of the LAQUAtwin pH pocket meter and measured. If the measured value is above pH 4.6, add more acetic acid to the rice mixture and stir well. Place new rice sample on the sensor and repeat testing process. After tests, wash the sensor with diluted soap water and pat dry with a paper tissue.

Results and Benefits

The use of accurate pH testing in controlling the quality of sushi rice prevents the growth of pathogenic bacteria and toxins. The LAQUAtwin pH pocket meter is small and compact; convenient to carry around in your pocket and is ideal for on-site testing. Its easy-to-use interface makes the LAQUAtwin pH pocket meter an indispensable tool for food testing.

References and Suggested Readings

¹ Hocking, A.D; 2003. Foodborne Microorganisms of Public Health Significance, AIFST, Waterloo

²Food Safety Guideline for Preparation and Display of Sushi, June 2007, NSW/FA/F1005/0706

The Schindler 5500 displays active faults on the SMLCD located within the main controller cabinet.

Measure the +24VR lines on the mainboard to confirm stable DC voltage.

The door operator detected an obstruction (real or phantom) three times in a row.

This won’t stop the car, but passengers will panic. Replace with Schindler-approved LED kits.

What the elevator it faulted out (e.g., opening doors, running at high speed, sitting idle)

An excessive current spike is detected in the motor, usually indicating a drive failure or motor overload.

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