HP 40C User Manual download pdf (Page 32)

Removal and replacement procedures 32

Push the module into the slot on the back of the ECS cabinet door until it clicks into place.

EPO thermister

Two EPO thermisters are located in the hot aisle, one in cooling zone 2 and one in cooling zone 5.

While the thermisters are not technically at-temperature monitoring devices, when the hot aisle temperature

reaches 60ºC (140ºF), the thermister switch closes. When both thermister switches are closed, the EPO

system initiates an emergency shutdown.

You need scissors for installation.

Removing the EPO thermister

1. Cut the tie wraps securing the thermister (1).

2. Pull the thermister down to remove the thermister (2).

Replacing the EPO thermister

1. Insert the replacement thermister (1).

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HP 40C User Manual Page 32