Case CX160C Excavator Service Manual

Description

Table of Contents

1. Content
2. Introduction
3. Engine
4. Hydraulics System
5. Frames and Ballasting
6. Tracks and Track Suspension
7. Cab Climate Control
8. Electrical System
9. Booms, dippers and buckets
10. Dozer Blade and Arm
11. Platform, cab, bodywork and decals
12. Special Tools Index
13. Hydraulic Schematics
14. Electrical Schematics

Manual Extract: Air conditioning – Overview

Explanation of control
Backup function
Even when air-conditioner operation is stopped with the vehicle main key power supply or operation panel ON/OFF switch, the set temperature and all the other setting states are stored in memory, so the next time air-conditioner operation starts, it goes into the same state as before it was stopped.
When the vehicle main key power supply is cut-off, the data is backed up by storing it in the internal EEPROM.
However, if the main key power supply is cut-off within 0.5 s. of switch input, that switch input is not stored into memory.
Also, the data read out from EEPROM when the power is switched ON is judged to see if it is within the valid range. If data outside the valid range was written into memory, for example due to noise, then operation starts from the default setting values to avoid abnormal operation.