
546 Chapter 17 Hardware procedures
241-1501-240 5.2S2
Installing a temperature sensor inside a lower cooling unit
Install a lower (rear) cooling unit temperature sensor to restore optimum
cooling and to reduce the rpm of the fans to normal speed.
Prerequisites
•
You must be familiar with “Safety considerations and best practices”
(page 53).
•
You need the appropriate version of temperature sensor:
— NTCC8938 (or A0647397) for the temperature sensor inside a lower
(rear) cooling unit NTHR51AA
— A0521940 or NTCC8938 (or A0647397) for the temperature sensor
inside a lower (rear) cooling unit NTHR51AB
WARNING
Risk of injury or equipment damage by electricity
While installing a temperature sensor inside a cooling unit,
less than -48/-60 V dc is still live on the controllers and
other two fans. Do not drop a screw, and because of the
exposed electronics inside the unit, do not use a magnetic
screwdriver. A dropped screw must be retrieved. Also, do
not touch anything other than the sensor, its screws, or its
wires.
WARNUNG
Verletzungsgefahr oder Geräteschäden durch
Elektrizität
Beachten Sie beim Austauschen eines Temperaturfühlers
in einem Kühlaggregat, daß die Steuerungen und
verbleibenden beiden Lüfter immer noch eine Spannung
von bis zu -48/-60 V führen. Lassen Sie keine Schrauben
fallen, und arbeiten Sie aufgrund der freiliegenden
Elektronikbauteile in der Einheit nicht mit einem
Magnetschraubendreher. Heben Sie fallengelassene
Schrauben auf. Berühren Sie nur den Temperaturfühler,
seine Schrauben und Verdrahtungen.
Содержание Passport 15000
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Страница 6: ...6 Publication history 241 1501 240 5 2S2 ...
Страница 32: ...32 Contents 241 1501 240 5 2S2 ...
Страница 48: ...48 About this document 241 1501 240 5 2S2 ...
Страница 52: ...52 Chapter 1 Overview of hardware tasks 241 1501 240 5 2S2 ...
Страница 70: ...70 Chapter 2 Safety considerations and best practices 241 1501 240 5 2S2 ...
Страница 84: ...84 Chapter 4 Alarm BITS module 241 1501 240 5 2S2 ...
Страница 94: ...94 Chapter 5 CP and FP cables 241 1501 240 5 2S2 ...
Страница 178: ...178 Chapter 11 Initial switch hardware installations 241 1501 240 5 2S2 ...
Страница 182: ...182 Chapter 12 MAC address module 241 1501 240 5 2S2 ...
Страница 216: ...216 Chapter 14 Power and ground hardware of a Passport 15000 or 20000 241 1501 240 5 2S2 ...
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