4
1. Introduction
1.1. About This Manual
This manual is intended for qualified service personnel who will perform maintenance and servicing on the
Great Group Medical Co., Ltd. VH-2600/VH-2600A Respiratory Humidifier. This manual covers the
product specifications, includes a maintenance schedule, and provides the necessary information required for
servicing.
NOTE: Some software may not be available in your country. Refer to your local Great Group Medical Co.,
Ltd. representative for the appropriate software version. Maintenance procedures should be carried out at
regular intervals (as recommended in the maintenance schedule 8), to ensure that the humidifier and its
accessories are working correctly.
If a fault should occur with the humidifier, follow the troubleshooting guide (section 5.2) in order to find the
most likely cause. If the unit requires servicing, make sure the servicing procedures are followed in order to
prevent damage to the humidifier. After service, or as part of the maintenance schedule, a humidifier
performance check should be completed.
Due to the nature of the electronics contained within this humidifier, it is not recommended that the printed
circuit boards be serviced at component level.
1.2. Glossary
Chamber
Device that allows gas to be to be heated and humidified by passing it over heated
water.
Temperature Probe Sensor assembly for measuring gas temperature.
Airway Probe Sensor assembly for measuring gas temperature at the end of the inspiratory limb.
Chamber Probe
Sensor assembly for measuring gas flow and temperature at the outlet of the
humidification chamber.
Thermistor A temperature sensitive resistor placed inside the chamber and airway probes.
Chamber Set Point The humidifier is expected to remain at chamber temperature.
Airway Set Point The humidifier is expected to remain at airway temperature.
Heater Wire Adapter Electrical connector between the breathing tube and the humidifier.
Breathing Circuit Tubing that carries respiratory gases to and from the patient.
Dual heated
Breathing Circuit
Wire inside the breathing circuit which heats the respiratory gases.
Single heated
Breathing Circuit
Wire inside the inspiratory tube which heats the respiratory gases.
PCB Printed Circuit Board.
Heater Wire Wire inside the breathing tube which heats the respiratory gases.
Inspiratory Limb The section of the breathing circuit that takes the inspired gases to the patient.
Expiratory Limb The section of the breathing circuit that takes the expired gases to the patient.
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